chore(hq): daily sync 2026-04-06

- cross_validate_prysm.py: 4 tests against prysm v0.21.1
- Noll convention variant identified and documented (sin/cos swap on paired modes)
- Aberration magnitudes agree to <1e-13 nm (machine precision)
- RMS WFE agreement: 1.4e-14 nm difference
- generate_validation_report.py: Creates 9 publication-quality figures
- Figures output to PKM project folder

Phase 2 conclusion: Atomizer Zernike implementation is verified correct.

.claude-mcp-06fea803.json

@@ -1 +0,0 @@
-{"mcpServers": {"atomizer": {"command": "node", "args": ["C:\\Users\\antoi\\Atomizer\\mcp-server\\atomizer-tools\\dist\\index.js"], "env": {"ATOMIZER_MODE": "user", "ATOMIZER_ROOT": "C:\\Users\\antoi\\Atomizer"}}}}

.claude-mcp-3e104790.json

@@ -1 +0,0 @@
-{"mcpServers": {"atomizer": {"command": "node", "args": ["C:\\Users\\antoi\\Atomizer\\mcp-server\\atomizer-tools\\dist\\index.js"], "env": {"ATOMIZER_MODE": "user", "ATOMIZER_ROOT": "C:\\Users\\antoi\\Atomizer"}}}}

.claude-prompt-06fea803.md

@@ -1,45 +0,0 @@
-# Atomizer Assistant
-
-You are the Atomizer Assistant - an expert system for structural optimization using FEA.
-
-**Current Mode**: USER
-
-Your role:
-- Help engineers with FEA optimization workflows
-- Create, configure, and run optimization studies
-- Analyze results and provide insights
-- Explain FEA concepts and methodology
-
-Important guidelines:
-- Be concise and professional
-- Use technical language appropriate for engineers
-- You are "Atomizer Assistant", not a generic AI
-- Use the available MCP tools to perform actions
-- When asked about studies, use the appropriate tools to get real data
-
-
----
-
-# Current Study: m1_mirror_flatback_lateral
-
-**Status**: Study directory not found.
-
----
-
-# User Mode Instructions
-
-You can help with optimization workflows:
-- Create and configure studies
-- Run optimizations
-- Analyze results
-- Generate reports
-- Explain FEA concepts
-
-**For code modifications**, suggest switching to Power Mode.
-
-Available tools:
-- `list_studies`, `get_study_status`, `create_study`
-- `run_optimization`, `stop_optimization`, `get_optimization_status`
-- `get_trial_data`, `analyze_convergence`, `compare_trials`, `get_best_design`
-- `generate_report`, `export_data`
-- `explain_physics`, `recommend_method`, `query_extractors`

.claude-prompt-3e104790.md

@@ -1,45 +0,0 @@
-# Atomizer Assistant
-
-You are the Atomizer Assistant - an expert system for structural optimization using FEA.
-
-**Current Mode**: USER
-
-Your role:
-- Help engineers with FEA optimization workflows
-- Create, configure, and run optimization studies
-- Analyze results and provide insights
-- Explain FEA concepts and methodology
-
-Important guidelines:
-- Be concise and professional
-- Use technical language appropriate for engineers
-- You are "Atomizer Assistant", not a generic AI
-- Use the available MCP tools to perform actions
-- When asked about studies, use the appropriate tools to get real data
-
-
----
-
-# Current Study: m1_mirror_flatback_lateral
-
-**Status**: Study directory not found.
-
----
-
-# User Mode Instructions
-
-You can help with optimization workflows:
-- Create and configure studies
-- Run optimizations
-- Analyze results
-- Generate reports
-- Explain FEA concepts
-
-**For code modifications**, suggest switching to Power Mode.
-
-Available tools:
-- `list_studies`, `get_study_status`, `create_study`
-- `run_optimization`, `stop_optimization`, `get_optimization_status`
-- `get_trial_data`, `analyze_convergence`, `compare_trials`, `get_best_design`
-- `generate_report`, `export_data`
-- `explain_physics`, `recommend_method`, `query_extractors`

.claude/settings.local.json

@@ -62,7 +62,26 @@
       "Bash(xargs -I{} git ls-tree -r -l HEAD {})",
       "Bash(sort:*)",
       "Bash(C:Usersantoianaconda3envsatomizerpython.exe introspect_model.py)",
-      "Bash(xargs:*)"
+      "Bash(xargs:*)",
+      "Bash(ping:*)",
+      "Bash(C:Usersantoianaconda3envsatomizerpython.exe -c \"import requests; r = requests.post\\(''http://127.0.0.1:8001/api/claude/sessions'', json={''mode'': ''user''}\\); print\\(f''Status: {r.status_code}''\\); print\\(f''Response: {r.text}''\\)\")",
+      "Bash(start \"Atomizer Backend\" cmd /k C:UsersantoiAtomizerrestart_backend.bat)",
+      "Bash(start \"Test Backend\" cmd /c \"cd /d C:\\\\Users\\\\antoi\\\\Atomizer\\\\atomizer-dashboard\\\\backend && C:\\\\Users\\\\antoi\\\\anaconda3\\\\Scripts\\\\activate.bat atomizer && python -m uvicorn api.main:app --port 8002\")",
+      "Bash(C:Usersantoianaconda3envsatomizerpython.exe C:UsersantoiAtomizertest_backend.py)",
+      "Bash(start \"Backend 8002\" C:UsersantoiAtomizerstart_backend_8002.bat)",
+      "Bash(C:Usersantoianaconda3envsatomizerpython.exe -c \"from api.main import app; print\\(''Import OK''\\)\")",
+      "Bash(find:*)",
+      "Bash(npx tailwindcss:*)",
+      "Bash(C:Usersantoianaconda3envsatomizerpython.exe -c \"from pathlib import Path; p = Path\\(''C:/Users/antoi/Atomizer/studies''\\) / ''M1_Mirror/m1_mirror_cost_reduction_lateral''; print\\(''exists:'', p.exists\\(\\), ''path:'', p\\)\")",
+      "Bash(C:Usersantoianaconda3envsatomizerpython.exe -c \"import sys, json; d=json.load\\(sys.stdin\\); print\\(''Study:'', d.get\\(''meta'',{}\\).get\\(''study_name'',''N/A''\\)\\); print\\(''Design Variables:''\\); [print\\(f''  - {dv[\"\"name\"\"]} \\({dv[\"\"expression_name\"\"]}\\)''\\) for dv in d.get\\(''design_variables'',[]\\)]\")",
+      "Bash(C:Usersantoianaconda3envsatomizerpython.exe -m py_compile:*)",
+      "Skill(ralph-loop:ralph-loop)",
+      "Skill(ralph-loop:ralph-loop:*)",
+      "mcp__Claude_in_Chrome__computer",
+      "mcp__Claude_in_Chrome__navigate",
+      "Bash(/c/Users/antoi/anaconda3/envs/atomizer/python.exe -m pip install:*)",
+      "Bash(/c/Users/antoi/anaconda3/envs/atomizer/python.exe tests/compare_triangle_vs_gmsh.py)",
+      "Bash(/c/Users/antoi/anaconda3/envs/atomizer/python.exe:*)"
     ],
     "deny": [],
     "ask": []

.claude/skills/01_CHEATSHEET.md

@@ -1,7 +1,7 @@
 ---
 skill_id: SKILL_001
-version: 2.4
-last_updated: 2025-12-31
+version: 2.5
+last_updated: 2026-01-22
 type: reference
 code_dependencies:
   - optimization_engine/extractors/__init__.py
@@ -14,8 +14,8 @@ requires_skills:
 
 # Atomizer Quick Reference Cheatsheet
 
-**Version**: 2.4
-**Updated**: 2025-12-31
+**Version**: 2.5
+**Updated**: 2026-01-22
 **Purpose**: Rapid lookup for common operations. "I want X → Use Y"
 
 ---
@@ -37,6 +37,8 @@ requires_skills:
 | **Use SAT (Self-Aware Turbo)** | **SYS_16** | SAT v3 for high-efficiency neural-accelerated optimization |
 | Generate physics insight | SYS_17 | `python -m optimization_engine.insights generate <study>` |
 | **Manage knowledge/playbook** | **SYS_18** | `from optimization_engine.context import AtomizerPlaybook` |
+| **Automate dev tasks** | **DevLoop** | `python tools/devloop_cli.py start "task"` |
+| **Test dashboard UI** | **DevLoop** | `python tools/devloop_cli.py browser --level full` |
 
 ---
 
@@ -678,6 +680,67 @@ feedback.process_trial_result(
 
 ---
 
+## DevLoop Quick Reference
+
+Closed-loop development system using AI agents + Playwright testing.
+
+### CLI Commands
+
+| Task | Command |
+|------|---------|
+| Full dev cycle | `python tools/devloop_cli.py start "Create new study"` |
+| Plan only | `python tools/devloop_cli.py plan "Fix validation"` |
+| Implement plan | `python tools/devloop_cli.py implement` |
+| Test study files | `python tools/devloop_cli.py test --study support_arm` |
+| Analyze failures | `python tools/devloop_cli.py analyze` |
+| Browser smoke test | `python tools/devloop_cli.py browser` |
+| Browser full tests | `python tools/devloop_cli.py browser --level full` |
+| Check status | `python tools/devloop_cli.py status` |
+| Quick test | `python tools/devloop_cli.py quick` |
+
+### Browser Test Levels
+
+| Level | Description | Tests |
+|-------|-------------|-------|
+| `quick` | Smoke test (page loads) | 1 |
+| `home` | Home page verification | 2 |
+| `full` | All UI + study tests | 5+ |
+| `study` | Canvas/dashboard for specific study | 3 |
+
+### State Files (`.devloop/`)
+
+| File | Purpose |
+|------|---------|
+| `current_plan.json` | Current implementation plan |
+| `test_results.json` | Filesystem/API test results |
+| `browser_test_results.json` | Playwright test results |
+| `analysis.json` | Failure analysis |
+
+### Prerequisites
+
+```bash
+# Start backend
+cd atomizer-dashboard/backend && python -m uvicorn api.main:app --reload --port 8000
+
+# Start frontend
+cd atomizer-dashboard/frontend && npm run dev
+
+# Install Playwright (once)
+cd atomizer-dashboard/frontend && npx playwright install chromium
+```
+
+### Standalone Playwright Tests
+
+```bash
+cd atomizer-dashboard/frontend
+npm run test:e2e          # Run all E2E tests
+npm run test:e2e:ui       # Playwright UI mode
+```
+
+**Full documentation**: `docs/guides/DEVLOOP.md`
+
+---
+
 ## Report Generation Quick Reference (OP_08)
 
 Generate comprehensive study reports from optimization data.

.claude/skills/modules/study-readme-generator.md

@@ -0,0 +1,206 @@
+# Study README Generator Skill
+
+**Skill ID**: STUDY_README_GENERATOR  
+**Version**: 1.0  
+**Purpose**: Generate intelligent, context-aware README.md files for optimization studies
+
+## When to Use
+
+This skill is invoked automatically during the study intake workflow when:
+1. A study moves from `introspected` to `configured` status
+2. User explicitly requests README generation
+3. Finalizing a study from the inbox
+
+## Input Context
+
+The README generator receives:
+
+```json
+{
+  "study_name": "bracket_mass_opt_v1",
+  "topic": "Brackets",
+  "description": "User's description from intake form",
+  "spec": { /* Full AtomizerSpec v2.0 */ },
+  "introspection": {
+    "expressions": [...],
+    "mass_kg": 1.234,
+    "solver_type": "NX_Nastran"
+  },
+  "context_files": {
+    "goals.md": "User's goals markdown content",
+    "notes.txt": "Any additional notes"
+  }
+}
+```
+
+## Output Format
+
+Generate a README.md with these sections:
+
+### 1. Title & Overview
+```markdown
+# {Study Name}
+
+**Topic**: {Topic}  
+**Created**: {Date}  
+**Status**: {Status}
+
+{One paragraph executive summary of the optimization goal}
+```
+
+### 2. Engineering Problem
+```markdown
+## Engineering Problem
+
+{Describe the physical problem being solved}
+
+### Model Description
+- **Geometry**: {Describe the part/assembly}
+- **Material**: {If known from introspection}
+- **Baseline Mass**: {mass_kg} kg
+
+### Loading Conditions
+{Describe loads and boundary conditions if available}
+```
+
+### 3. Optimization Formulation
+```markdown
+## Optimization Formulation
+
+### Design Variables ({count})
+| Variable | Expression | Range | Units |
+|----------|------------|-------|-------|
+| {name} | {expr_name} | [{min}, {max}] | {units} |
+
+### Objectives ({count})
+| Objective | Direction | Weight | Source |
+|-----------|-----------|--------|--------|
+| {name} | {direction} | {weight} | {extractor} |
+
+### Constraints ({count})
+| Constraint | Condition | Threshold | Type |
+|------------|-----------|-----------|------|
+| {name} | {operator} | {threshold} | {type} |
+```
+
+### 4. Methodology
+```markdown
+## Methodology
+
+### Algorithm
+- **Primary**: {algorithm_type}
+- **Max Trials**: {max_trials}
+- **Surrogate**: {if enabled}
+
+### Physics Extraction
+{Describe extractors used}
+
+### Convergence Criteria
+{Describe stopping conditions}
+```
+
+### 5. Expected Outcomes
+```markdown
+## Expected Outcomes
+
+Based on the optimization setup:
+- Expected improvement: {estimate if baseline available}
+- Key trade-offs: {identify from objectives/constraints}
+- Risk factors: {any warnings from validation}
+```
+
+## Generation Guidelines
+
+1. **Be Specific**: Use actual values from the spec, not placeholders
+2. **Be Concise**: Engineers don't want to read novels
+3. **Be Accurate**: Only state facts that can be verified from input
+4. **Be Helpful**: Include insights that aid understanding
+5. **No Fluff**: Avoid marketing language or excessive praise
+
+## Claude Prompt Template
+
+```
+You are generating a README.md for an FEA optimization study. 
+
+CONTEXT:
+{json_context}
+
+RULES:
+1. Use the actual data provided - never use placeholder values
+2. Write in technical engineering language appropriate for structural engineers
+3. Keep each section concise but complete
+4. If information is missing, note it as "TBD" or skip the section
+5. Include physical units wherever applicable
+6. Format tables properly with alignment
+
+Generate the README.md content:
+```
+
+## Example Output
+
+```markdown
+# Bracket Mass Optimization V1
+
+**Topic**: Simple_Bracket  
+**Created**: 2026-01-22  
+**Status**: Configured
+
+Optimize the mass of a structural L-bracket while maintaining stress below yield and displacement within tolerance.
+
+## Engineering Problem
+
+### Model Description
+- **Geometry**: L-shaped mounting bracket with web and flange
+- **Material**: Steel (assumed based on typical applications)
+- **Baseline Mass**: 0.847 kg
+
+### Loading Conditions
+Static loading with force applied at mounting holes. Fixed constraints at base.
+
+## Optimization Formulation
+
+### Design Variables (3)
+| Variable | Expression | Range | Units |
+|----------|------------|-------|-------|
+| Web Thickness | web_thickness | [2.0, 10.0] | mm |
+| Flange Width | flange_width | [15.0, 40.0] | mm |
+| Fillet Radius | fillet_radius | [2.0, 8.0] | mm |
+
+### Objectives (1)
+| Objective | Direction | Weight | Source |
+|-----------|-----------|--------|--------|
+| Total Mass | minimize | 1.0 | mass_extractor |
+
+### Constraints (1)
+| Constraint | Condition | Threshold | Type |
+|------------|-----------|-----------|------|
+| Max Stress | <= | 250 MPa | hard |
+
+## Methodology
+
+### Algorithm
+- **Primary**: TPE (Tree-structured Parzen Estimator)
+- **Max Trials**: 100
+- **Surrogate**: Disabled
+
+### Physics Extraction
+- Mass: Extracted from NX expression `total_mass`
+- Stress: Von Mises stress from SOL101 static analysis
+
+### Convergence Criteria
+- Max trials: 100
+- Early stopping: 20 trials without improvement
+
+## Expected Outcomes
+
+Based on the optimization setup:
+- Expected improvement: 15-30% mass reduction (typical for thickness optimization)
+- Key trade-offs: Mass vs. stress margin
+- Risk factors: None identified
+```
+
+## Integration Points
+
+- **Backend**: `api/services/claude_readme.py` calls Claude API with this prompt
+- **Endpoint**: `POST /api/intake/{study_name}/readme`
+- **Trigger**: Automatic on status transition to `configured`

.devloop/browser_test_results.json

@@ -0,0 +1,33 @@
+{
+  "timestamp": "2026-01-22T18:13:30.884945",
+  "scenarios": [
+    {
+      "scenario_id": "browser_home_stats",
+      "scenario_name": "Home page shows statistics",
+      "passed": true,
+      "duration_ms": 1413.166,
+      "error": null,
+      "details": {
+        "navigated_to": "http://localhost:3003/",
+        "found_selector": "text=Total Trials"
+      }
+    },
+    {
+      "scenario_id": "browser_expand_folder",
+      "scenario_name": "Topic folder expands on click",
+      "passed": true,
+      "duration_ms": 2785.3219999999997,
+      "error": null,
+      "details": {
+        "navigated_to": "http://localhost:3003/",
+        "found_selector": "span:has-text('completed'), span:has-text('running'), span:has-text('paused')",
+        "clicked": "button:has-text('trials')"
+      }
+    }
+  ],
+  "summary": {
+    "passed": 2,
+    "failed": 0,
+    "total": 2
+  }
+}

.devloop/current_plan.json

@@ -0,0 +1,16 @@
+{
+  "objective": "Implement Dashboard Intake & AtomizerSpec Integration: Phase 1 - Create backend intake API routes (create, introspect, list, topics endpoints) and spec_manager service. The spec_models.py and JSON schema have already been updated with SpecStatus, IntrospectionData, BaselineData, and ExpressionInfo models. Now need to create: 1) backend/api/services/spec_manager.py for centralized spec CRUD, 2) backend/api/routes/intake.py with endpoints for creating inbox folders, running introspection, listing inbox contents, and listing topics, 3) Register the intake router in main.py. Reference the plan at docs/plans/DASHBOARD_INTAKE_ATOMIZERSPEC_INTEGRATION.md",
+  "approach": "Fallback plan - manual implementation",
+  "tasks": [
+    {
+      "id": "task_001",
+      "description": "Implement: Implement Dashboard Intake & AtomizerSpec Integration: Phase 1 - Create backend intake API routes (create, introspect, list, topics endpoints) and spec_manager service. The spec_models.py and JSON schema have already been updated with SpecStatus, IntrospectionData, BaselineData, and ExpressionInfo models. Now need to create: 1) backend/api/services/spec_manager.py for centralized spec CRUD, 2) backend/api/routes/intake.py with endpoints for creating inbox folders, running introspection, listing inbox contents, and listing topics, 3) Register the intake router in main.py. Reference the plan at docs/plans/DASHBOARD_INTAKE_ATOMIZERSPEC_INTEGRATION.md",
+      "file": "TBD",
+      "priority": "high"
+    }
+  ],
+  "test_scenarios": [],
+  "acceptance_criteria": [
+    "Implement Dashboard Intake & AtomizerSpec Integration: Phase 1 - Create backend intake API routes (create, introspect, list, topics endpoints) and spec_manager service. The spec_models.py and JSON schema have already been updated with SpecStatus, IntrospectionData, BaselineData, and ExpressionInfo models. Now need to create: 1) backend/api/services/spec_manager.py for centralized spec CRUD, 2) backend/api/routes/intake.py with endpoints for creating inbox folders, running introspection, listing inbox contents, and listing topics, 3) Register the intake router in main.py. Reference the plan at docs/plans/DASHBOARD_INTAKE_ATOMIZERSPEC_INTEGRATION.md"
+  ]
+}

.devloop/test_results.json

@@ -0,0 +1,64 @@
+{
+  "timestamp": "2026-01-22T21:10:54.742272",
+  "scenarios": [
+    {
+      "scenario_id": "test_study_dir",
+      "scenario_name": "Study directory exists: stage_3_arm",
+      "passed": true,
+      "duration_ms": 0.0,
+      "error": null,
+      "details": {
+        "path": "C:\\Users\\antoi\\Atomizer\\studies\\Stage3\\stage_3_arm",
+        "exists": true
+      }
+    },
+    {
+      "scenario_id": "test_spec",
+      "scenario_name": "AtomizerSpec is valid JSON",
+      "passed": true,
+      "duration_ms": 1.045,
+      "error": null,
+      "details": {
+        "valid_json": true
+      }
+    },
+    {
+      "scenario_id": "test_readme",
+      "scenario_name": "README exists",
+      "passed": true,
+      "duration_ms": 0.0,
+      "error": null,
+      "details": {
+        "path": "C:\\Users\\antoi\\Atomizer\\studies\\Stage3\\stage_3_arm\\README.md",
+        "exists": true
+      }
+    },
+    {
+      "scenario_id": "test_run_script",
+      "scenario_name": "run_optimization.py exists",
+      "passed": true,
+      "duration_ms": 0.0,
+      "error": null,
+      "details": {
+        "path": "C:\\Users\\antoi\\Atomizer\\studies\\Stage3\\stage_3_arm\\run_optimization.py",
+        "exists": true
+      }
+    },
+    {
+      "scenario_id": "test_model_dir",
+      "scenario_name": "Model directory exists",
+      "passed": true,
+      "duration_ms": 0.0,
+      "error": null,
+      "details": {
+        "path": "C:\\Users\\antoi\\Atomizer\\studies\\Stage3\\stage_3_arm\\1_setup\\model",
+        "exists": true
+      }
+    }
+  ],
+  "summary": {
+    "passed": 5,
+    "failed": 0,
+    "total": 5
+  }
+}

.gitignore

@@ -15,6 +15,11 @@ lib64/
 parts/
 sdist/
 var/
+
+# NOTE: This repo includes a React frontend that legitimately uses src/lib/.
+# The broad Python ignore `lib/` would ignore that. Re-include it:
+!atomizer-dashboard/frontend/src/lib/
+!atomizer-dashboard/frontend/src/lib/**
 wheels/
 *.egg-info/
 .installed.cfg
@@ -110,5 +115,34 @@ _dat_run*.dat
 .claude-mcp-*.json
 .claude-prompt-*.md
 
+# Backend logs
+backend_stdout.log
+backend_stderr.log
+*.log.bak
+
+# Linter/formatter caches
+.ruff_cache/
+.mypy_cache/
+
 # Auto-generated documentation (regenerate with: python -m optimization_engine.auto_doc all)
 docs/generated/
+
+# NX model introspection caches (generated)
+**/_introspection_*.json
+**/_introspection_cache.json
+**/_temp_introspection.json
+**/params.exp
+
+# Insight outputs (generated)
+**/3_insights/
+
+# Malformed filenames (Windows path used as filename)
+C:*
+*.gitmodules
+
+# project-context-sync (auto-generated, local only)
+PROJECT_STATE.md
+
+# Test results (synced via Syncthing, not git)
+test_results/*.json
+test_results/*.log

.mcp.json

@@ -7,6 +7,10 @@
         "ATOMIZER_MODE": "user",
         "ATOMIZER_ROOT": "C:/Users/antoi/Atomizer"
       }
+    },
+    "nxopen-docs": {
+      "command": "C:/Users/antoi/CADtomaste/Atomaste-NXOpen-MCP/.venv/Scripts/python.exe",
+      "args": ["-m", "nxopen_mcp.server", "--data-dir", "C:/Users/antoi/CADtomaste/Atomaste-NXOpen-MCP/data"]
     }
   }
 }

.project-context.yml

@@ -0,0 +1,21 @@
+# project-context-sync configuration
+# See: https://github.com/clawdbot/skills/project-context-sync
+
+project_context:
+  # Use AI to generate smart summaries
+  # true: Rich context with inferred focus and suggestions (uses tokens)
+  # false: Raw git info only (fast, free)
+  ai_summary: true
+  
+  # How many recent commits to show
+  recent_commits: 5
+  
+  # Include file change stats in output
+  include_diff_stats: true
+  
+  # Sections to include in PROJECT_STATE.md
+  sections:
+    - last_commit       # Always included
+    - recent_changes    # Recent commit list
+    - current_focus     # AI-generated (requires ai_summary: true)
+    - suggested_next    # AI-generated (requires ai_summary: true)

CHANGELOG.md

@@ -6,6 +6,64 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased]
 
+## [0.5.0] - 2025-01-24
+
+### Project Cleanup & Organization
+- Deleted 102+ orphaned MCP session temp files
+- Removed build artifacts (htmlcov, dist, __pycache__)
+- Archived superseded plan documents (RALPH_LOOP V2/V3, CANVAS V3, etc.)
+- Moved debug/analysis scripts from tests/ to tools/analysis/
+- Updated .gitignore with missing patterns
+- Cleaned empty directories
+
+## [0.4.0] - 2025-01-22
+
+### Canvas UX Improvements (Phases 7-9)
+- **Resizable Panels**: Left sidebar (200-400px) and right panel (280-600px) with localStorage persistence
+- **All Palette Items Enabled**: All 8 node types now draggable (model, solver, designVar, extractor, objective, constraint, algorithm, surrogate)
+- **Solver Configuration**: Engine selection (NX Nastran, MSC Nastran, Python Script) with solution type dropdowns (SOL101-SOL200)
+
+### AtomizerSpec v2.0
+- Unified JSON configuration schema for all studies
+- Added SolverEngine and NastranSolutionType types
+- Canvas position persistence for all nodes
+- Migration support from legacy optimization_config.json
+
+## [0.3.0] - 2025-01-18
+
+### Dashboard V3.1 - Canvas Builder
+- Visual workflow builder with 9 node types
+- Spec ↔ ReactFlow bidirectional converter
+- WebSocket real-time synchronization
+- Claude chat integration
+- Custom extractors with in-canvas code editor
+- Model introspection panel
+
+### Learning Atomizer Core (LAC)
+- Persistent memory system for accumulated knowledge
+- Session insights recording (failures, workarounds, patterns)
+- Optimization outcome tracking
+
+## [0.2.5] - 2025-01-16
+
+### GNN Surrogate for Zernike Optimization
+- PolarMirrorGraph with fixed 3000-node polar grid
+- ZernikeGNN model with design-conditioned convolutions
+- Differentiable GPU-accelerated Zernike fitting
+- Training pipeline with multi-task loss
+
+### DevLoop Automation
+- Closed-loop development system with AI agents
+- Gemini planning, Claude implementation
+- Playwright browser testing for dashboard UI
+
+## [0.2.1] - 2025-01-07
+
+### Optimization Engine v2.0 Restructure
+- Reorganized into modular subpackages (core/, nx/, study/, config/)
+- SpecManager for AtomizerSpec handling
+- Deprecation warnings for old import paths
+
 ### Phase 3.3 - Dashboard & Multi-Solution Support (November 23, 2025)
 
 #### Added

CLAUDE.md

@@ -55,6 +55,49 @@ If working directory is inside a study (`studies/*/`):
 - If no study context: Offer to create one or list available studies
 - After code changes: Update documentation proactively (SYS_12, cheatsheet)
 
+### Step 5: Use DevLoop for Multi-Step Development Tasks
+
+**CRITICAL: For any development task with 3+ steps, USE DEVLOOP instead of manual work.**
+
+DevLoop is the closed-loop development system that coordinates AI agents for autonomous development:
+
+```bash
+# Plan a task with Gemini
+python tools/devloop_cli.py plan "fix extractor exports"
+
+# Implement with Claude
+python tools/devloop_cli.py implement
+
+# Test filesystem/API
+python tools/devloop_cli.py test --study support_arm
+
+# Test dashboard UI with Playwright
+python tools/devloop_cli.py browser --level full
+
+# Analyze failures
+python tools/devloop_cli.py analyze
+
+# Full autonomous cycle
+python tools/devloop_cli.py start "add new stress extractor"
+```
+
+**When to use DevLoop:**
+- Fixing bugs that require multiple file changes
+- Adding new features or extractors
+- Debugging optimization failures
+- Testing dashboard UI changes
+- Any task that would take 3+ manual steps
+
+**Browser test levels:**
+- `quick` - Smoke test (1 test)
+- `home` - Home page verification (2 tests)
+- `full` - All UI tests (5+ tests)
+- `study` - Canvas/dashboard for specific study
+
+**DO NOT default to manual debugging** - use the automation we built!
+
+**Full documentation**: `docs/guides/DEVLOOP.md`
+
 ---
 
 ## Quick Start - Protocol Operating System

DEVELOPMENT.md

@@ -1,619 +0,0 @@
-# Atomizer Development Guide
-
-**Last Updated**: 2025-11-21
-**Current Phase**: Phase 3.2 - Integration Sprint + Documentation
-**Status**: 🟢 Core Complete (100%) | ✅ Protocols 10/11/13 Active (100%) | 🎯 Dashboard Live (95%) | 📚 Documentation Reorganized
-
-📘 **Quick Links**:
-- [Protocol Specifications](docs/PROTOCOLS.md) - All active protocols consolidated
-- [Documentation Index](docs/00_INDEX.md) - Complete documentation navigation
-- [README](README.md) - Project overview and quick start
-
----
-
-## Table of Contents
-
-1. [Current Phase](#current-phase)
-2. [Completed Features](#completed-features)
-3. [Active Development](#active-development)
-4. [Known Issues](#known-issues)
-5. [Testing Status](#testing-status)
-6. [Phase-by-Phase Progress](#phase-by-phase-progress)
-
----
-
-## Current Phase
-
-### Phase 3.2: Integration Sprint (🎯 TOP PRIORITY)
-
-**Goal**: Connect LLM intelligence components to production workflow
-
-**Timeline**: 2-4 weeks (Started 2025-11-17)
-
-**Status**: LLM components built and tested individually (85% complete). Need to wire them into production runner.
-
-📋 **Detailed Plan**: [docs/PHASE_3_2_INTEGRATION_PLAN.md](docs/PHASE_3_2_INTEGRATION_PLAN.md)
-
-**Critical Path**:
-
-#### Week 1: Make LLM Mode Accessible (16 hours)
-- [ ] **1.1** Create unified entry point `optimization_engine/run_optimization.py` (4h)
-  - Add `--llm` flag for natural language mode
-  - Add `--request` parameter for natural language input
-  - Support both LLM and traditional JSON modes
-  - Preserve backward compatibility
-
-- [ ] **1.2** Wire LLMOptimizationRunner to production (8h)
-  - Connect LLMWorkflowAnalyzer to entry point
-  - Bridge LLMOptimizationRunner → OptimizationRunner
-  - Pass model updater and simulation runner callables
-  - Integrate with existing hook system
-
-- [ ] **1.3** Create minimal example (2h)
-  - Create `examples/llm_mode_demo.py`
-  - Show natural language → optimization results
-  - Compare traditional (100 lines) vs LLM (3 lines)
-
-- [ ] **1.4** End-to-end integration test (2h)
-  - Test with simple_beam_optimization study
-  - Verify extractors generated correctly
-  - Validate output matches manual mode
-
-#### Week 2: Robustness & Safety (16 hours)
-- [ ] **2.1** Code validation pipeline (6h)
-  - Create `optimization_engine/code_validator.py`
-  - Implement syntax validation (ast.parse)
-  - Implement security scanning (whitelist imports)
-  - Implement test execution on example OP2
-  - Add retry with LLM feedback on failure
-
-- [ ] **2.2** Graceful fallback mechanisms (4h)
-  - Wrap all LLM calls in try/except
-  - Provide clear error messages
-  - Offer fallback to manual mode
-  - Never crash on LLM failure
-
-- [ ] **2.3** LLM audit trail (3h)
-  - Create `optimization_engine/llm_audit.py`
-  - Log all LLM requests and responses
-  - Log generated code with prompts
-  - Create `llm_audit.json` in study output
-
-- [ ] **2.4** Failure scenario testing (3h)
-  - Test invalid natural language request
-  - Test LLM unavailable
-  - Test generated code syntax errors
-  - Test validation failures
-
-#### Week 3: Learning System (12 hours)
-- [ ] **3.1** Knowledge base implementation (4h)
-  - Create `optimization_engine/knowledge_base.py`
-  - Implement `save_session()` - Save successful workflows
-  - Implement `search_templates()` - Find similar patterns
-  - Add confidence scoring
-
-- [ ] **3.2** Template extraction (4h)
-  - Extract reusable patterns from generated code
-  - Parameterize variable parts
-  - Save templates with usage examples
-  - Implement template application to new requests
-
-- [ ] **3.3** ResearchAgent integration (4h)
-  - Complete ResearchAgent implementation
-  - Integrate into ExtractorOrchestrator error handling
-  - Add user example collection workflow
-  - Save learned knowledge to knowledge base
-
-#### Week 4: Documentation & Discoverability (8 hours)
-- [ ] **4.1** Update README (2h)
-  - Add "🤖 LLM-Powered Mode" section
-  - Show example command with natural language
-  - Link to detailed docs
-
-- [ ] **4.2** Create LLM mode documentation (3h)
-  - Create `docs/LLM_MODE.md`
-  - Explain how LLM mode works
-  - Provide usage examples
-  - Add troubleshooting guide
-
-- [ ] **4.3** Create demo video/GIF (1h)
-  - Record terminal session
-  - Show before/after (100 lines → 3 lines)
-  - Create animated GIF for README
-
-- [ ] **4.4** Update all planning docs (2h)
-  - Update DEVELOPMENT.md status
-  - Update DEVELOPMENT_GUIDANCE.md (80-90% → 90-95%)
-  - Mark Phase 3.2 as ✅ Complete
-
----
-
-## Completed Features
-
-### ✅ Live Dashboard System (Completed 2025-11-21)
-
-#### Backend (FastAPI + WebSocket)
-- [x] **FastAPI Backend** ([atomizer-dashboard/backend/](atomizer-dashboard/backend/))
-  - REST API endpoints for study management
-  - WebSocket streaming with file watching (Watchdog)
-  - Real-time updates (<100ms latency)
-  - CORS configured for local development
-
-- [x] **REST API Endpoints** ([backend/api/routes/optimization.py](atomizer-dashboard/backend/api/routes/optimization.py))
-  - `GET /api/optimization/studies` - List all studies
-  - `GET /api/optimization/studies/{id}/status` - Get study status
-  - `GET /api/optimization/studies/{id}/history` - Get trial history
-  - `GET /api/optimization/studies/{id}/pruning` - Get pruning diagnostics
-
-- [x] **WebSocket Streaming** ([backend/api/websocket/optimization_stream.py](atomizer-dashboard/backend/api/websocket/optimization_stream.py))
-  - File watching on `optimization_history_incremental.json`
-  - Real-time trial updates via WebSocket
-  - Pruning alerts and progress updates
-  - Automatic observer lifecycle management
-
-#### Frontend (HTML + Chart.js)
-- [x] **Enhanced Live Dashboard** ([atomizer-dashboard/dashboard-enhanced.html](atomizer-dashboard/dashboard-enhanced.html))
-  - Real-time WebSocket updates
-  - Interactive convergence chart (Chart.js)
-  - Parameter space scatter plot
-  - Pruning alerts (toast notifications)
-  - Data export (JSON/CSV)
-  - Study auto-discovery and selection
-  - Metric dashboard (trials, best value, pruned count)
-
-#### React Frontend (In Progress)
-- [x] **Project Configuration** ([atomizer-dashboard/frontend/](atomizer-dashboard/frontend/))
-  - React 18 + Vite 5 + TypeScript 5.2
-  - TailwindCSS 3.3 for styling
-  - Recharts 2.10 for charts
-  - Complete build configuration
-
-- [x] **TypeScript Types** ([frontend/src/types/](atomizer-dashboard/frontend/src/types/))
-  - Complete type definitions for API data
-  - WebSocket message types
-  - Chart data structures
-
-- [x] **Custom Hooks** ([frontend/src/hooks/useWebSocket.ts](atomizer-dashboard/frontend/src/hooks/useWebSocket.ts))
-  - WebSocket connection management
-  - Auto-reconnection with exponential backoff
-  - Type-safe message routing
-
-- [x] **Reusable Components** ([frontend/src/components/](atomizer-dashboard/frontend/src/components/))
-  - Card, MetricCard, Badge, StudyCard components
-  - TailwindCSS styling with dark theme
-
-- [ ] **Dashboard Page** (Pending manual completion)
-  - Need to run `npm install`
-  - Create main.tsx, App.tsx, Dashboard.tsx
-  - Integrate Recharts for charts
-  - Test end-to-end
-
-#### Documentation
-- [x] **Dashboard Master Plan** ([docs/DASHBOARD_MASTER_PLAN.md](docs/DASHBOARD_MASTER_PLAN.md))
-  - Complete 3-page architecture (Configurator, Live Dashboard, Results Viewer)
-  - Tech stack recommendations
-  - Implementation phases
-
-- [x] **Implementation Status** ([docs/DASHBOARD_IMPLEMENTATION_STATUS.md](docs/DASHBOARD_IMPLEMENTATION_STATUS.md))
-  - Current progress tracking
-  - Testing instructions
-  - Next steps
-
-- [x] **React Implementation Guide** ([docs/DASHBOARD_REACT_IMPLEMENTATION.md](docs/DASHBOARD_REACT_IMPLEMENTATION.md))
-  - Complete templates for remaining components
-  - Recharts integration examples
-  - Troubleshooting guide
-
-- [x] **Session Summary** ([docs/DASHBOARD_SESSION_SUMMARY.md](docs/DASHBOARD_SESSION_SUMMARY.md))
-  - Features demonstrated
-  - How to use the dashboard
-  - Architecture explanation
-
-### ✅ Phase 1: Plugin System & Infrastructure (Completed 2025-01-16)
-
-#### Core Architecture
-- [x] **Hook Manager** ([optimization_engine/plugins/hook_manager.py](optimization_engine/plugins/hook_manager.py))
-  - Hook registration with priority-based execution
-  - Auto-discovery from plugin directories
-  - Context passing to all hooks
-  - Execution history tracking
-
-- [x] **Lifecycle Hooks**
-  - `pre_solve`: Execute before solver launch
-  - `post_solve`: Execute after solve, before extraction
-  - `post_extraction`: Execute after result extraction
-
-#### Logging Infrastructure
-- [x] **Detailed Trial Logs** ([detailed_logger.py](optimization_engine/plugins/pre_solve/detailed_logger.py))
-  - Per-trial log files in `optimization_results/trial_logs/`
-  - Complete iteration trace with timestamps
-  - Design variables, configuration, timeline
-  - Extracted results and constraint evaluations
-
-- [x] **High-Level Optimization Log** ([optimization_logger.py](optimization_engine/plugins/pre_solve/optimization_logger.py))
-  - `optimization.log` file tracking overall progress
-  - Configuration summary header
-  - Compact START/COMPLETE entries per trial
-  - Easy to scan format for monitoring
-
-- [x] **Result Appenders**
-  - [log_solve_complete.py](optimization_engine/plugins/post_solve/log_solve_complete.py) - Appends solve completion to trial logs
-  - [log_results.py](optimization_engine/plugins/post_extraction/log_results.py) - Appends extracted results to trial logs
-  - [optimization_logger_results.py](optimization_engine/plugins/post_extraction/optimization_logger_results.py) - Appends results to optimization.log
-
-#### Project Organization
-- [x] **Studies Structure** ([studies/](studies/))
-  - Standardized folder layout with `model/`, `optimization_results/`, `analysis/`
-  - Comprehensive documentation in [studies/README.md](studies/README.md)
-  - Example study: [bracket_stress_minimization/](studies/bracket_stress_minimization/)
-  - Template structure for future studies
-
-- [x] **Path Resolution** ([atomizer_paths.py](atomizer_paths.py))
-  - Intelligent project root detection using marker files
-  - Helper functions: `root()`, `optimization_engine()`, `studies()`, `tests()`
-  - `ensure_imports()` for robust module imports
-  - Works regardless of script location
-
-#### Testing
-- [x] **Hook Validation Test** ([test_hooks_with_bracket.py](tests/test_hooks_with_bracket.py))
-  - Verifies hook loading and execution
-  - Tests 3 trials with dummy data
-  - Checks hook execution history
-
-- [x] **Integration Tests**
-  - [run_5trial_test.py](tests/run_5trial_test.py) - Quick 5-trial optimization
-  - [test_journal_optimization.py](tests/test_journal_optimization.py) - Full optimization test
-
-#### Runner Enhancements
-- [x] **Context Passing** ([runner.py:332,365,412](optimization_engine/runner.py))
-  - `output_dir` passed to all hook contexts
-  - Trial number, design variables, extracted results
-  - Configuration dictionary available to hooks
-
-### ✅ Core Engine (Pre-Phase 1)
-- [x] Optuna integration with TPE sampler
-- [x] Multi-objective optimization support
-- [x] NX journal execution ([nx_solver.py](optimization_engine/nx_solver.py))
-- [x] Expression updates ([nx_updater.py](optimization_engine/nx_updater.py))
-- [x] OP2 result extraction (stress, displacement)
-- [x] Study management with resume capability
-- [x] Web dashboard (real-time monitoring)
-- [x] Precision control (4-decimal rounding)
-
----
-
-## Active Development
-
-### In Progress - Dashboard (High Priority)
-- [x] Backend API complete (FastAPI + WebSocket)
-- [x] HTML dashboard with Chart.js complete
-- [x] React project structure and configuration complete
-- [ ] **Complete React frontend** (Awaiting manual npm install)
-  - [ ] Run `npm install` in frontend directory
-  - [ ] Create main.tsx and App.tsx
-  - [ ] Create Dashboard.tsx with Recharts
-  - [ ] Test end-to-end with live optimization
-
-### Up Next - Dashboard (Next Session)
-- [ ] Study Configurator page (React)
-- [ ] Results Report Viewer page (React)
-- [ ] LLM chat interface integration (future)
-- [ ] Docker deployment configuration
-
-### In Progress - Phase 3.2 Integration
-- [ ] Feature registry creation (Phase 2, Week 1)
-- [ ] Claude skill definition (Phase 2, Week 1)
-
-### Up Next (Phase 2, Week 2)
-- [ ] Natural language parser
-- [ ] Intent classification system
-- [ ] Entity extraction for optimization parameters
-- [ ] Conversational workflow manager
-
-### Backlog (Phase 3+)
-- [ ] Custom function generator (RSS, weighted objectives)
-- [ ] Journal script generator
-- [ ] Code validation pipeline
-- [ ] Result analyzer with statistical analysis
-- [ ] Surrogate quality checker
-- [ ] HTML/PDF report generator
-
----
-
-## Known Issues
-
-### Critical
-- None currently
-
-### Minor
-- [ ] `.claude/settings.local.json` modified during development (contains user-specific settings)
-- [ ] Some old bash background processes still running from previous tests
-
-### Documentation
-- [ ] Need to add examples of custom hooks to studies/README.md
-- [ ] Missing API documentation for hook_manager methods
-- [ ] No developer guide for creating new plugins
-
----
-
-## Testing Status
-
-### Automated Tests
-- ✅ **Hook system** - `test_hooks_with_bracket.py` passing
-- ✅ **5-trial integration** - `run_5trial_test.py` working
-- ✅ **Full optimization** - `test_journal_optimization.py` functional
-- ⏳ **Unit tests** - Need to create for individual modules
-- ⏳ **CI/CD pipeline** - Not yet set up
-
-### Manual Testing
-- ✅ Bracket optimization (50 trials)
-- ✅ Log file generation in correct locations
-- ✅ Hook execution at all lifecycle points
-- ✅ Path resolution across different script locations
-- ✅ **Dashboard backend** - REST API and WebSocket tested successfully
-- ✅ **HTML dashboard** - Live updates working with Chart.js
-- ⏳ **React dashboard** - Pending npm install and completion
-- ⏳ Resume functionality with config validation
-
-### Test Coverage
-- Hook manager: ~80% (core functionality tested)
-- Logging plugins: 100% (tested via integration tests)
-- Path resolution: 100% (tested in all scripts)
-- Result extractors: ~70% (basic tests exist)
-- **Dashboard backend**: ~90% (REST endpoints and WebSocket tested)
-- **Dashboard frontend**: ~60% (HTML version tested, React pending)
-- Overall: ~65% estimated
-
----
-
-## Phase-by-Phase Progress
-
-### Phase 1: Plugin System ✅ (100% Complete)
-
-**Completed** (2025-01-16):
-- [x] Hook system for optimization lifecycle
-- [x] Plugin auto-discovery and registration
-- [x] Hook manager with priority-based execution
-- [x] Detailed per-trial logs (`trial_logs/`)
-- [x] High-level optimization log (`optimization.log`)
-- [x] Context passing system for hooks
-- [x] Studies folder structure
-- [x] Comprehensive studies documentation
-- [x] Model file organization (`model/` folder)
-- [x] Intelligent path resolution
-- [x] Test suite for hook system
-
-**Deferred to Future Phases**:
-- Feature registry → Phase 2 (with LLM interface)
-- `pre_mesh` and `post_mesh` hooks → Future (not needed for current workflow)
-- Custom objective/constraint registration → Phase 3 (Code Generation)
-
----
-
-### Phase 2: LLM Integration 🟡 (0% Complete)
-
-**Target**: 2 weeks (Started 2025-01-16)
-
-#### Week 1 Todos (Feature Registry & Claude Skill)
-- [ ] Create `optimization_engine/feature_registry.json`
-- [ ] Extract all current capabilities
-- [ ] Draft `.claude/skills/atomizer.md`
-- [ ] Test LLM's ability to navigate codebase
-
-#### Week 2 Todos (Natural Language Interface)
-- [ ] Implement intent classifier
-- [ ] Build entity extractor
-- [ ] Create workflow manager
-- [ ] Test end-to-end: "Create a stress minimization study"
-
-**Success Criteria**:
-- [ ] LLM can create optimization from natural language in <5 turns
-- [ ] 90% of user requests understood correctly
-- [ ] Zero manual JSON editing required
-
----
-
-### Phase 3: Code Generation ⏳ (Not Started)
-
-**Target**: 3 weeks
-
-**Key Deliverables**:
-- [ ] Custom function generator
-  - [ ] RSS (Root Sum Square) template
-  - [ ] Weighted objectives template
-  - [ ] Custom constraints template
-- [ ] Journal script generator
-- [ ] Code validation pipeline
-- [ ] Safe execution environment
-
-**Success Criteria**:
-- [ ] LLM generates 10+ custom functions with zero errors
-- [ ] All generated code passes safety validation
-- [ ] Users save 50% time vs. manual coding
-
----
-
-### Phase 4: Analysis & Decision Support ⏳ (Not Started)
-
-**Target**: 3 weeks
-
-**Key Deliverables**:
-- [ ] Result analyzer (convergence, sensitivity, outliers)
-- [ ] Surrogate model quality checker (R², CV score, confidence intervals)
-- [ ] Decision assistant (trade-offs, what-if analysis, recommendations)
-
-**Success Criteria**:
-- [ ] Surrogate quality detection 95% accurate
-- [ ] Recommendations lead to 30% faster convergence
-- [ ] Users report higher confidence in results
-
----
-
-### Phase 5: Automated Reporting ⏳ (Not Started)
-
-**Target**: 2 weeks
-
-**Key Deliverables**:
-- [ ] Report generator with Jinja2 templates
-- [ ] Multi-format export (HTML, PDF, Markdown, JSON)
-- [ ] LLM-written narrative explanations
-
-**Success Criteria**:
-- [ ] Reports generated in <30 seconds
-- [ ] Narrative quality rated 4/5 by engineers
-- [ ] 80% of reports used without manual editing
-
----
-
-### Phase 6: NX MCP Enhancement ⏳ (Not Started)
-
-**Target**: 4 weeks
-
-**Key Deliverables**:
-- [ ] NX documentation MCP server
-- [ ] Advanced NX operations library
-- [ ] Feature bank with 50+ pre-built operations
-
-**Success Criteria**:
-- [ ] NX MCP answers 95% of API questions correctly
-- [ ] Feature bank covers 80% of common workflows
-- [ ] Users write 50% less manual journal code
-
----
-
-### Phase 7: Self-Improving System ⏳ (Not Started)
-
-**Target**: 4 weeks
-
-**Key Deliverables**:
-- [ ] Feature learning system
-- [ ] Best practices database
-- [ ] Continuous documentation generation
-
-**Success Criteria**:
-- [ ] 20+ user-contributed features in library
-- [ ] Pattern recognition identifies 10+ best practices
-- [ ] Documentation auto-updates with zero manual effort
-
----
-
-## Development Commands
-
-### Running Dashboard
-```bash
-# Start backend server
-cd atomizer-dashboard/backend
-python -m uvicorn api.main:app --reload --host 0.0.0.0 --port 8000
-
-# Access HTML dashboard (current)
-# Open browser: http://localhost:8000
-
-# Start React frontend (when ready)
-cd atomizer-dashboard/frontend
-npm install  # First time only
-npm run dev  # Starts on http://localhost:3000
-```
-
-### Running Tests
-```bash
-# Hook validation (3 trials, fast)
-python tests/test_hooks_with_bracket.py
-
-# Quick integration test (5 trials)
-python tests/run_5trial_test.py
-
-# Full optimization test
-python tests/test_journal_optimization.py
-```
-
-### Code Quality
-```bash
-# Run linter (when available)
-# pylint optimization_engine/
-
-# Run type checker (when available)
-# mypy optimization_engine/
-
-# Run all tests (when test suite is complete)
-# pytest tests/
-```
-
-### Git Workflow
-```bash
-# Stage all changes
-git add .
-
-# Commit with conventional commits format
-git commit -m "feat: description"  # New feature
-git commit -m "fix: description"   # Bug fix
-git commit -m "docs: description"  # Documentation
-git commit -m "test: description"  # Tests
-git commit -m "refactor: description"  # Code refactoring
-
-# Push to GitHub
-git push origin main
-```
-
----
-
-## Documentation
-
-### For Developers
-- [DEVELOPMENT_ROADMAP.md](DEVELOPMENT_ROADMAP.md) - Strategic vision and phases
-- [studies/README.md](studies/README.md) - Studies folder organization
-- [CHANGELOG.md](CHANGELOG.md) - Version history
-
-### Dashboard Documentation
-- [docs/DASHBOARD_MASTER_PLAN.md](docs/DASHBOARD_MASTER_PLAN.md) - Complete architecture blueprint
-- [docs/DASHBOARD_IMPLEMENTATION_STATUS.md](docs/DASHBOARD_IMPLEMENTATION_STATUS.md) - Current progress
-- [docs/DASHBOARD_REACT_IMPLEMENTATION.md](docs/DASHBOARD_REACT_IMPLEMENTATION.md) - React implementation guide
-- [docs/DASHBOARD_SESSION_SUMMARY.md](docs/DASHBOARD_SESSION_SUMMARY.md) - Session summary
-- [atomizer-dashboard/README.md](atomizer-dashboard/README.md) - Dashboard quick start
-- [atomizer-dashboard/backend/README.md](atomizer-dashboard/backend/README.md) - Backend API docs
-- [atomizer-dashboard/frontend/README.md](atomizer-dashboard/frontend/README.md) - Frontend setup guide
-
-### For Users
-- [README.md](README.md) - Project overview and quick start
-- [docs/INDEX.md](docs/INDEX.md) - Complete documentation index
-- [docs/](docs/) - Additional documentation
-
----
-
-## Notes
-
-### Architecture Decisions
-- **Hook system**: Chose priority-based execution to allow precise control of plugin order
-- **Path resolution**: Used marker files instead of environment variables for simplicity
-- **Logging**: Two-tier system (detailed trial logs + high-level optimization.log) for different use cases
-
-### Performance Considerations
-- Hook execution adds <1s overhead per trial (acceptable for FEA simulations)
-- Path resolution caching could improve startup time (future optimization)
-- Log file sizes grow linearly with trials (~10KB per trial)
-
-### Future Considerations
-- Consider moving to structured logging (JSON) for easier parsing
-- May need database for storing hook execution history (currently in-memory)
-- Dashboard integration will require WebSocket for real-time log streaming
-
----
-
-**Last Updated**: 2025-11-21
-**Maintained by**: Antoine Polvé (antoine@atomaste.com)
-**Repository**: [GitHub - Atomizer](https://github.com/yourusername/Atomizer)
-
----
-
-## Recent Updates (November 21, 2025)
-
-### Dashboard System Implementation ✅
-- **Backend**: FastAPI + WebSocket with real-time file watching complete
-- **HTML Dashboard**: Functional dashboard with Chart.js, data export, pruning alerts
-- **React Setup**: Complete project configuration, types, hooks, components
-- **Documentation**: 5 comprehensive markdown documents covering architecture, implementation, and usage
-
-### Next Immediate Steps
-1. Run `npm install` in `atomizer-dashboard/frontend`
-2. Create `main.tsx`, `App.tsx`, and `Dashboard.tsx` using provided templates
-3. Test React dashboard with live optimization
-4. Build Study Configurator page (next major feature)

INSTALL_INSTRUCTIONS.md

@@ -1,63 +0,0 @@
-# Atomizer Installation Guide
-
-## Step 1: Install Miniconda (Recommended)
-
-1. Download Miniconda from: https://docs.conda.io/en/latest/miniconda.html
-   - Choose: **Miniconda3 Windows 64-bit**
-
-2. Run the installer:
-   - Check "Add Miniconda3 to my PATH environment variable"
-   - Check "Register Miniconda3 as my default Python"
-
-3. Restart your terminal/VSCode after installation
-
-## Step 2: Create Atomizer Environment
-
-Open **Anaconda Prompt** (or any terminal after restart) and run:
-
-```bash
-cd C:\Users\Antoine\Atomizer
-conda env create -f environment.yml
-conda activate atomizer
-```
-
-## Step 3: Install PyTorch with GPU Support (Optional but Recommended)
-
-If you have an NVIDIA GPU:
-
-```bash
-conda activate atomizer
-pip install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu121
-pip install torch-geometric
-```
-
-## Step 4: Verify Installation
-
-```bash
-conda activate atomizer
-python -c "import torch; import optuna; import pyNastran; print('All imports OK!')"
-python -c "import torch; print(f'CUDA available: {torch.cuda.is_available()}')"
-```
-
-## Step 5: Train Neural Network
-
-```bash
-conda activate atomizer
-cd C:\Users\Antoine\Atomizer\atomizer-field
-python train_parametric.py --train_dir ../atomizer_field_training_data/bracket_stiffness_optimization_atomizerfield --epochs 100 --output_dir runs/bracket_model
-```
-
-## Quick Commands Reference
-
-```bash
-# Activate environment (do this every time you open a new terminal)
-conda activate atomizer
-
-# Train neural network
-cd C:\Users\Antoine\Atomizer\atomizer-field
-python train_parametric.py --train_dir ../atomizer_field_training_data/bracket_stiffness_optimization_atomizerfield --epochs 100
-
-# Run optimization with neural acceleration
-cd C:\Users\Antoine\Atomizer\studies\bracket_stiffness_optimization_atomizerfield
-python run_optimization.py --run --trials 100 --enable-nn
-```

PROJECT_STATUS.md

@@ -0,0 +1,111 @@
+# PROJECT_STATUS.md
+
+> **Bridge document for Mario (Clawdbot) ↔ Claude Code coordination**
+> 
+> Both AIs should read this at session start. Update when priorities change.
+
+*Last updated: 2026-01-27 by Mario*
+
+---
+
+## Current Focus
+
+**Phase**: Foundation (Phase 1)
+**Sprint**: 2026-01-27 to 2026-02-03
+
+### This Week's Priorities
+
+**Now (Sprint 1.5): Draft + Publish (S2)**
+1. 🔴 Implement DraftManager (local autosave draft per study)
+2. 🔴 Add Draft vs Published banner + Publish button
+3. 🔴 Restore/discard draft prompt on load
+
+**Next (Sprint 2): Create Wizard v1 shell**
+4. 🟡 /create route + stepper
+5. 🟡 Files step (dependency tree + _i.prt warnings)
+6. 🟡 Introspection step (expressions + DV selection)
+
+### Completed recently
+- Spec/Canvas wiring sync foundation (converters, connect/delete wiring, output picker, panel rewiring, edge projection)
+
+### Blocked
+- None (but local npm install on this server fails due to peer deps; run builds/tests on Windows dev env)
+
+---
+
+## Active Decisions
+
+| Decision | Summary | Date |
+|----------|---------|------|
+| Full Partnership | Mario = PM, reviewer, architect. Antoine = developer, NX. | 2026-01-27 |
+| Dashboard on Windows | Keep simple for now, hybrid architecture later | 2026-01-27 |
+| Adopt Clawdbot Patterns | MEMORY.md, QUICK_REF.md, simplified CLAUDE.md | 2026-01-27 |
+
+---
+
+## For Claude Code
+
+When starting a session:
+
+1. ✅ Read CLAUDE.md (system instructions)
+2. ✅ Read PROJECT_STATUS.md (this file — current priorities)
+3. ✅ Read `knowledge_base/lac/session_insights/failure.jsonl` (critical lessons)
+4. 🔲 After session: Commit any new LAC insights to Git
+
+### LAC Commit Protocol (NEW)
+
+After each significant session, commit LAC changes:
+
+```bash
+cd Atomizer
+git add knowledge_base/lac/
+git commit -m "lac: Session insights from YYYY-MM-DD"
+git push origin main && git push github main
+```
+
+This ensures Mario can see what Claude Code learned.
+
+---
+
+## For Mario (Clawdbot)
+
+When checking on Atomizer:
+
+1. Pull latest from Gitea: `cd /home/papa/repos/Atomizer && git pull`
+2. Check `knowledge_base/lac/session_insights/` for new learnings
+3. Update tracking files in `/home/papa/clawd/memory/atomizer/`
+4. Update this file if priorities change
+
+### Heartbeat Check (Add to HEARTBEAT.md)
+
+```markdown
+### Atomizer Check (weekly)
+- git pull Atomizer repo
+- Check for new LAC insights
+- Review recent commits
+- Update roadmap if needed
+```
+
+---
+
+## Recent Activity
+
+| Date | Activity | Who |
+|------|----------|-----|
+| 2026-01-27 | Created master plan in PKM | Mario |
+| 2026-01-27 | Created tracking files | Mario |
+| 2026-01-27 | ACKed Atomizer project | Mario |
+| 2026-01-27 | Canvas V3.1 improvements | Claude Code (prior) |
+
+---
+
+## Links
+
+- **Master Plan**: `/home/papa/obsidian-vault/2-Projects/Atomizer-AtomasteAI/Development/ATOMIZER-NEXT-LEVEL-MASTERPLAN.md`
+- **Mario's Tracking**: `/home/papa/clawd/memory/atomizer/`
+- **LAC Insights**: `knowledge_base/lac/session_insights/`
+- **Full Roadmap**: See Master Plan in PKM
+
+---
+
+*This file lives in the repo. Both AIs can read it. Only update when priorities change.*

atomizer-dashboard/backend/api/main.py

@@ -13,7 +13,19 @@ import sys
 # Add parent directory to path to import optimization_engine
 sys.path.append(str(Path(__file__).parent.parent.parent.parent))
 
-from api.routes import optimization, claude, terminal, insights, context, files, nx
+from api.routes import (
+    optimization,
+    claude,
+    terminal,
+    insights,
+    context,
+    files,
+    nx,
+    claude_code,
+    spec,
+    devloop,
+    intake,
+)
 from api.websocket import optimization_stream
 
 
@@ -23,6 +35,7 @@ async def lifespan(app: FastAPI):
     """Manage application lifespan - start/stop session manager"""
     # Startup
     from api.routes.claude import get_session_manager
+
     manager = get_session_manager()
     await manager.start()
     print("Session manager started")
@@ -60,6 +73,12 @@ app.include_router(insights.router, prefix="/api/insights", tags=["insights"])
 app.include_router(context.router, prefix="/api/context", tags=["context"])
 app.include_router(files.router, prefix="/api/files", tags=["files"])
 app.include_router(nx.router, prefix="/api/nx", tags=["nx"])
+app.include_router(claude_code.router, prefix="/api", tags=["claude-code"])
+app.include_router(spec.router, prefix="/api", tags=["spec"])
+app.include_router(spec.validate_router, prefix="/api", tags=["spec"])
+app.include_router(devloop.router, prefix="/api", tags=["devloop"])
+app.include_router(intake.router, prefix="/api", tags=["intake"])
+
 
 @app.get("/")
 async def root():
@@ -67,11 +86,13 @@ async def root():
     dashboard_path = Path(__file__).parent.parent.parent / "dashboard-enhanced.html"
     return FileResponse(dashboard_path)
 
+
 @app.get("/health")
 async def health_check():
     """Health check endpoint with database status"""
     try:
         from api.services.conversation_store import ConversationStore
+
         store = ConversationStore()
         # Test database by creating/getting a health check session
         store.get_session("health_check")
@@ -84,12 +105,8 @@ async def health_check():
         "database": db_status,
     }
 
+
 if __name__ == "__main__":
     import uvicorn
-    uvicorn.run(
-        "main:app",
-        host="0.0.0.0",
-        port=8000,
-        reload=True,
-        log_level="info"
-    )
+
+    uvicorn.run("main:app", host="0.0.0.0", port=8000, reload=True, log_level="info")

atomizer-dashboard/backend/api/routes/claude.py

@@ -187,7 +187,15 @@ async def session_websocket(websocket: WebSocket, session_id: str):
                     continue
 
                 # Get canvas state from message or use stored state
-                canvas_state = data.get("canvas_state") or current_canvas_state
+                msg_canvas = data.get("canvas_state")
+                canvas_state = msg_canvas if msg_canvas is not None else current_canvas_state
+
+                # Debug logging
+                if canvas_state:
+                    node_count = len(canvas_state.get("nodes", []))
+                    print(f"[Claude WS] Sending message with canvas state: {node_count} nodes")
+                else:
+                    print("[Claude WS] Sending message WITHOUT canvas state")
 
                 async for chunk in manager.send_message(
                     session_id,
@@ -401,6 +409,175 @@ async def websocket_chat(websocket: WebSocket):
             pass
 
 
+# ========== POWER MODE: Direct API with Write Tools ==========
+
+@router.websocket("/sessions/{session_id}/ws/power")
+async def power_mode_websocket(websocket: WebSocket, session_id: str):
+    """
+    WebSocket for power mode chat using direct Anthropic API with write tools.
+
+    Unlike the regular /ws endpoint which uses Claude CLI + MCP,
+    this uses AtomizerClaudeAgent directly with built-in write tools.
+    This allows immediate modifications without permission prompts.
+
+    Message formats (client -> server):
+        {"type": "message", "content": "user message"}
+        {"type": "set_study", "study_id": "study_name"}
+        {"type": "ping"}
+
+    Message formats (server -> client):
+        {"type": "text", "content": "..."}
+        {"type": "tool_call", "tool": "...", "input": {...}}
+        {"type": "tool_result", "result": "..."}
+        {"type": "done", "tool_calls": [...]}
+        {"type": "error", "message": "..."}
+        {"type": "spec_modified", "changes": [...]}
+        {"type": "pong"}
+    """
+    await websocket.accept()
+
+    manager = get_session_manager()
+    session = manager.get_session(session_id)
+
+    if not session:
+        await websocket.send_json({"type": "error", "message": "Session not found"})
+        await websocket.close()
+        return
+
+    # Import AtomizerClaudeAgent for direct API access
+    from api.services.claude_agent import AtomizerClaudeAgent
+
+    # Create agent with study context
+    agent = AtomizerClaudeAgent(study_id=session.study_id)
+    conversation_history: List[Dict[str, Any]] = []
+
+    # Load initial spec and set canvas state so Claude sees current canvas
+    initial_spec = agent.load_current_spec()
+    if initial_spec:
+        # Send initial spec to frontend
+        await websocket.send_json({
+            "type": "spec_updated",
+            "spec": initial_spec,
+            "reason": "initial_load"
+        })
+
+    try:
+        while True:
+            data = await websocket.receive_json()
+
+            if data.get("type") == "message":
+                content = data.get("content", "")
+                if not content:
+                    continue
+
+                try:
+                    # Use streaming API with tool support for real-time response
+                    last_tool_calls = []
+                    async for event in agent.chat_stream_with_tools(content, conversation_history):
+                        event_type = event.get("type")
+
+                        if event_type == "text":
+                            # Stream text tokens to frontend immediately
+                            await websocket.send_json({
+                                "type": "text",
+                                "content": event.get("content", ""),
+                            })
+
+                        elif event_type == "tool_call":
+                            # Tool is being called
+                            tool_info = event.get("tool", {})
+                            await websocket.send_json({
+                                "type": "tool_call",
+                                "tool": tool_info,
+                            })
+
+                        elif event_type == "tool_result":
+                            # Tool finished executing
+                            tool_name = event.get("tool", "")
+                            await websocket.send_json({
+                                "type": "tool_result",
+                                "tool": tool_name,
+                                "result": event.get("result", ""),
+                            })
+
+                            # If it was a write tool, send full updated spec
+                            if tool_name in ["add_design_variable", "add_extractor",
+                                              "add_objective", "add_constraint",
+                                              "update_spec_field", "remove_node",
+                                              "create_study"]:
+                                # Load updated spec and update agent's canvas state
+                                updated_spec = agent.load_current_spec()
+                                if updated_spec:
+                                    await websocket.send_json({
+                                        "type": "spec_updated",
+                                        "tool": tool_name,
+                                        "spec": updated_spec,  # Full spec for direct canvas update
+                                    })
+
+                        elif event_type == "done":
+                            # Streaming complete
+                            last_tool_calls = event.get("tool_calls", [])
+                            await websocket.send_json({
+                                "type": "done",
+                                "tool_calls": last_tool_calls,
+                            })
+
+                            # Update conversation history for next message
+                            # Note: For proper history tracking, we'd need to store messages properly
+                            # For now, we append the user message and response
+                            conversation_history.append({"role": "user", "content": content})
+                            conversation_history.append({"role": "assistant", "content": event.get("response", "")})
+
+                except Exception as e:
+                    import traceback
+                    traceback.print_exc()
+                    await websocket.send_json({
+                        "type": "error",
+                        "message": str(e),
+                    })
+
+            elif data.get("type") == "canvas_edit":
+                # User made a manual edit to the canvas - update Claude's context
+                spec = data.get("spec")
+                if spec:
+                    agent.set_canvas_state(spec)
+                    await websocket.send_json({
+                        "type": "canvas_edit_received",
+                        "acknowledged": True
+                    })
+
+            elif data.get("type") == "set_study":
+                study_id = data.get("study_id")
+                if study_id:
+                    await manager.set_study_context(session_id, study_id)
+                    # Recreate agent with new study context
+                    agent = AtomizerClaudeAgent(study_id=study_id)
+                    conversation_history = []  # Clear history on study change
+                    # Load spec for new study
+                    new_spec = agent.load_current_spec()
+                    await websocket.send_json({
+                        "type": "context_updated",
+                        "study_id": study_id,
+                    })
+                    if new_spec:
+                        await websocket.send_json({
+                            "type": "spec_updated",
+                            "spec": new_spec,
+                            "reason": "study_change"
+                        })
+
+            elif data.get("type") == "ping":
+                await websocket.send_json({"type": "pong"})
+
+    except WebSocketDisconnect:
+        pass
+    except Exception as e:
+        try:
+            await websocket.send_json({"type": "error", "message": str(e)})
+        except:
+            pass
+
+
 @router.get("/suggestions")
 async def get_chat_suggestions(study_id: Optional[str] = None):
     """

atomizer-dashboard/backend/api/routes/claude_code.py

@@ -83,23 +83,49 @@ async def generate_extractor_code(request: ExtractorGenerationRequest):
     # Build focused system prompt for extractor generation
     system_prompt = """You are generating a Python custom extractor function for Atomizer FEA optimization.
 
-The function MUST:
-1. Have signature: def extract(op2_path: str, fem_path: str, params: dict, subcase_id: int = 1) -> dict
-2. Return a dict with extracted values (e.g., {"max_stress": 150.5, "mass": 2.3})
-3. Use pyNastran.op2.op2.OP2 for reading OP2 results
-4. Handle missing data gracefully with try/except blocks
+IMPORTANT: Choose the appropriate function signature based on what data is needed:
 
-Available imports (already available, just use them):
-- from pyNastran.op2.op2 import OP2
-- import numpy as np
-- from pathlib import Path
+## Option 1: FEA Results (OP2) - Use for stresses, displacements, frequencies, forces
+```python
+def extract(op2_path: str, fem_path: str, params: dict, subcase_id: int = 1) -> dict:
+    from pyNastran.op2.op2 import OP2
+    op2 = OP2()
+    op2.read_op2(op2_path)
+    # Access: op2.displacements[subcase_id], op2.cquad4_stress[subcase_id], etc.
+    return {"max_stress": value}
+```
 
-Common patterns:
-- Displacement: op2.displacements[subcase_id].data[0, :, 1:4] (x,y,z components)
+## Option 2: Expression/Computed Values (no FEA needed) - Use for dimensions, volumes, derived values
+```python
+def extract(trial_dir: str, config: dict, context: dict) -> dict:
+    import json
+    from pathlib import Path
+    
+    # Read mass properties (if available from model introspection)
+    mass_file = Path(trial_dir) / "mass_properties.json"
+    if mass_file.exists():
+        with open(mass_file) as f:
+            props = json.load(f)
+        mass = props.get("mass_kg", 0)
+    
+    # Or use config values directly (e.g., expression values)
+    length_mm = config.get("length_expression", 100)
+    
+    # context has results from other extractors
+    other_value = context.get("other_extractor_output", 0)
+    
+    return {"computed_value": length_mm * 2}
+```
+
+Available imports: pyNastran.op2.op2.OP2, numpy, pathlib.Path, json
+
+Common OP2 patterns:
+- Displacement: op2.displacements[subcase_id].data[0, :, 1:4] (x,y,z)
 - Stress: op2.cquad4_stress[subcase_id] or op2.ctria3_stress[subcase_id]
 - Eigenvalues: op2.eigenvalues[subcase_id]
+- Mass: op2.grid_point_weight (if available)
 
-Return ONLY the complete Python code wrapped in ```python ... ```. No explanations outside the code block."""
+Return ONLY the complete Python code wrapped in ```python ... ```. No explanations."""
 
     # Build user prompt with context
     user_prompt = f"Generate a custom extractor that: {request.prompt}"

atomizer-dashboard/backend/api/routes/devloop.py

@@ -0,0 +1,416 @@
+"""
+DevLoop API Endpoints - Closed-loop development orchestration.
+
+Provides REST API and WebSocket for:
+- Starting/stopping development cycles
+- Monitoring progress
+- Executing single phases
+- Viewing history and learnings
+"""
+
+from fastapi import APIRouter, HTTPException, WebSocket, WebSocketDisconnect, BackgroundTasks
+from pydantic import BaseModel, Field
+from typing import Any, Dict, List, Optional
+import asyncio
+import json
+import sys
+from pathlib import Path
+from datetime import datetime
+
+# Add project root to path
+sys.path.append(str(Path(__file__).parent.parent.parent.parent.parent))
+
+router = APIRouter(prefix="/devloop", tags=["devloop"])
+
+# Global orchestrator instance
+_orchestrator = None
+_active_cycle = None
+_websocket_clients: List[WebSocket] = []
+
+
+def get_orchestrator():
+    """Get or create the DevLoop orchestrator."""
+    global _orchestrator
+    if _orchestrator is None:
+        from optimization_engine.devloop import DevLoopOrchestrator
+
+        _orchestrator = DevLoopOrchestrator(
+            {
+                "dashboard_url": "http://localhost:8000",
+                "websocket_url": "ws://localhost:8000",
+                "studies_dir": str(Path(__file__).parent.parent.parent.parent.parent / "studies"),
+                "learning_enabled": True,
+            }
+        )
+
+        # Subscribe to state updates
+        _orchestrator.subscribe(_broadcast_state_update)
+
+    return _orchestrator
+
+
+def _broadcast_state_update(state):
+    """Broadcast state updates to all WebSocket clients."""
+    asyncio.create_task(
+        _send_to_all_clients(
+            {
+                "type": "state_update",
+                "state": {
+                    "phase": state.phase.value,
+                    "iteration": state.iteration,
+                    "current_task": state.current_task,
+                    "last_update": state.last_update,
+                },
+            }
+        )
+    )
+
+
+async def _send_to_all_clients(message: Dict):
+    """Send message to all connected WebSocket clients."""
+    disconnected = []
+    for client in _websocket_clients:
+        try:
+            await client.send_json(message)
+        except Exception:
+            disconnected.append(client)
+
+    # Clean up disconnected clients
+    for client in disconnected:
+        if client in _websocket_clients:
+            _websocket_clients.remove(client)
+
+
+# ============================================================================
+# Request/Response Models
+# ============================================================================
+
+
+class StartCycleRequest(BaseModel):
+    """Request to start a development cycle."""
+
+    objective: str = Field(..., description="What to achieve")
+    context: Optional[Dict[str, Any]] = Field(default=None, description="Additional context")
+    max_iterations: Optional[int] = Field(default=10, description="Maximum iterations")
+
+
+class StepRequest(BaseModel):
+    """Request to execute a single step."""
+
+    phase: str = Field(..., description="Phase to execute: plan, implement, test, analyze")
+    data: Optional[Dict[str, Any]] = Field(default=None, description="Phase-specific data")
+
+
+class CycleStatusResponse(BaseModel):
+    """Response with cycle status."""
+
+    active: bool
+    phase: str
+    iteration: int
+    current_task: Optional[str]
+    last_update: str
+
+
+# ============================================================================
+# REST Endpoints
+# ============================================================================
+
+
+@router.get("/status")
+async def get_status() -> CycleStatusResponse:
+    """Get current DevLoop status."""
+    orchestrator = get_orchestrator()
+    state = orchestrator.get_state()
+
+    return CycleStatusResponse(
+        active=state["phase"] != "idle",
+        phase=state["phase"],
+        iteration=state["iteration"],
+        current_task=state.get("current_task"),
+        last_update=state["last_update"],
+    )
+
+
+@router.post("/start")
+async def start_cycle(request: StartCycleRequest, background_tasks: BackgroundTasks):
+    """
+    Start a new development cycle.
+
+    The cycle runs in the background and broadcasts progress via WebSocket.
+    """
+    global _active_cycle
+
+    orchestrator = get_orchestrator()
+
+    # Check if already running
+    if orchestrator.state.phase.value != "idle":
+        raise HTTPException(status_code=409, detail="A development cycle is already running")
+
+    # Start cycle in background
+    async def run_cycle():
+        global _active_cycle
+        try:
+            result = await orchestrator.run_development_cycle(
+                objective=request.objective,
+                context=request.context,
+                max_iterations=request.max_iterations,
+            )
+            _active_cycle = result
+
+            # Broadcast completion
+            await _send_to_all_clients(
+                {
+                    "type": "cycle_complete",
+                    "result": {
+                        "objective": result.objective,
+                        "status": result.status,
+                        "iterations": len(result.iterations),
+                        "duration_seconds": result.total_duration_seconds,
+                    },
+                }
+            )
+        except Exception as e:
+            await _send_to_all_clients({"type": "cycle_error", "error": str(e)})
+
+    background_tasks.add_task(run_cycle)
+
+    return {
+        "message": "Development cycle started",
+        "objective": request.objective,
+    }
+
+
+@router.post("/stop")
+async def stop_cycle():
+    """Stop the current development cycle."""
+    orchestrator = get_orchestrator()
+
+    if orchestrator.state.phase.value == "idle":
+        raise HTTPException(status_code=400, detail="No active cycle to stop")
+
+    # Set state to idle (will stop at next phase boundary)
+    orchestrator._update_state(phase=orchestrator.state.phase.__class__.IDLE, task="Stopping...")
+
+    return {"message": "Cycle stop requested"}
+
+
+@router.post("/step")
+async def execute_step(request: StepRequest):
+    """
+    Execute a single phase step.
+
+    Useful for manual control or debugging.
+    """
+    orchestrator = get_orchestrator()
+
+    if request.phase == "plan":
+        objective = request.data.get("objective", "") if request.data else ""
+        context = request.data.get("context") if request.data else None
+        result = await orchestrator.step_plan(objective, context)
+
+    elif request.phase == "implement":
+        plan = request.data if request.data else {}
+        result = await orchestrator.step_implement(plan)
+
+    elif request.phase == "test":
+        scenarios = request.data.get("scenarios", []) if request.data else []
+        result = await orchestrator.step_test(scenarios)
+
+    elif request.phase == "analyze":
+        test_results = request.data if request.data else {}
+        result = await orchestrator.step_analyze(test_results)
+
+    else:
+        raise HTTPException(
+            status_code=400,
+            detail=f"Unknown phase: {request.phase}. Valid: plan, implement, test, analyze",
+        )
+
+    return {"phase": request.phase, "result": result}
+
+
+@router.get("/history")
+async def get_history():
+    """Get history of past development cycles."""
+    orchestrator = get_orchestrator()
+    return orchestrator.export_history()
+
+
+@router.get("/last-cycle")
+async def get_last_cycle():
+    """Get details of the most recent cycle."""
+    global _active_cycle
+
+    if _active_cycle is None:
+        raise HTTPException(status_code=404, detail="No cycle has been run yet")
+
+    return {
+        "objective": _active_cycle.objective,
+        "status": _active_cycle.status,
+        "start_time": _active_cycle.start_time,
+        "end_time": _active_cycle.end_time,
+        "iterations": [
+            {
+                "iteration": it.iteration,
+                "success": it.success,
+                "duration_seconds": it.duration_seconds,
+                "has_plan": it.plan is not None,
+                "has_tests": it.test_results is not None,
+                "has_fixes": it.fixes is not None,
+            }
+            for it in _active_cycle.iterations
+        ],
+        "total_duration_seconds": _active_cycle.total_duration_seconds,
+    }
+
+
+@router.get("/health")
+async def health_check():
+    """Check DevLoop system health."""
+    orchestrator = get_orchestrator()
+
+    # Check dashboard connection
+    from optimization_engine.devloop import DashboardTestRunner
+
+    runner = DashboardTestRunner()
+    dashboard_health = await runner.run_health_check()
+
+    return {
+        "devloop": "healthy",
+        "orchestrator_state": orchestrator.get_state()["phase"],
+        "dashboard": dashboard_health,
+    }
+
+
+# ============================================================================
+# WebSocket Endpoint
+# ============================================================================
+
+
+@router.websocket("/ws")
+async def websocket_endpoint(websocket: WebSocket):
+    """
+    WebSocket endpoint for real-time DevLoop updates.
+
+    Messages sent:
+    - state_update: Phase/iteration changes
+    - cycle_complete: Cycle finished
+    - cycle_error: Cycle failed
+    - test_progress: Individual test results
+    """
+    await websocket.accept()
+    _websocket_clients.append(websocket)
+
+    orchestrator = get_orchestrator()
+
+    try:
+        # Send initial state
+        await websocket.send_json(
+            {
+                "type": "connection_ack",
+                "state": orchestrator.get_state(),
+            }
+        )
+
+        # Handle incoming messages
+        while True:
+            try:
+                data = await asyncio.wait_for(websocket.receive_json(), timeout=30.0)
+
+                msg_type = data.get("type")
+
+                if msg_type == "ping":
+                    await websocket.send_json({"type": "pong"})
+
+                elif msg_type == "get_state":
+                    await websocket.send_json(
+                        {
+                            "type": "state",
+                            "state": orchestrator.get_state(),
+                        }
+                    )
+
+                elif msg_type == "start_cycle":
+                    # Allow starting cycle via WebSocket
+                    objective = data.get("objective", "")
+                    context = data.get("context")
+
+                    asyncio.create_task(orchestrator.run_development_cycle(objective, context))
+
+                    await websocket.send_json(
+                        {
+                            "type": "cycle_started",
+                            "objective": objective,
+                        }
+                    )
+
+            except asyncio.TimeoutError:
+                # Send heartbeat
+                await websocket.send_json({"type": "heartbeat"})
+
+    except WebSocketDisconnect:
+        pass
+    finally:
+        if websocket in _websocket_clients:
+            _websocket_clients.remove(websocket)
+
+
+# ============================================================================
+# Convenience Endpoints for Common Tasks
+# ============================================================================
+
+
+@router.post("/create-study")
+async def create_study_cycle(
+    study_name: str,
+    problem_statement: Optional[str] = None,
+    background_tasks: BackgroundTasks = None,
+):
+    """
+    Convenience endpoint to start a study creation cycle.
+
+    This is a common workflow that combines planning, implementation, and testing.
+    """
+    orchestrator = get_orchestrator()
+
+    context = {
+        "study_name": study_name,
+        "task_type": "create_study",
+    }
+
+    if problem_statement:
+        context["problem_statement"] = problem_statement
+
+    # Start the cycle
+    async def run_cycle():
+        result = await orchestrator.run_development_cycle(
+            objective=f"Create optimization study: {study_name}",
+            context=context,
+        )
+        return result
+
+    if background_tasks:
+        background_tasks.add_task(run_cycle)
+        return {"message": f"Study creation cycle started for '{study_name}'"}
+    else:
+        result = await run_cycle()
+        return {
+            "message": f"Study '{study_name}' creation completed",
+            "status": result.status,
+            "iterations": len(result.iterations),
+        }
+
+
+@router.post("/run-tests")
+async def run_tests(scenarios: List[Dict[str, Any]]):
+    """
+    Run a set of test scenarios directly.
+
+    Useful for testing specific features without a full cycle.
+    """
+    from optimization_engine.devloop import DashboardTestRunner
+
+    runner = DashboardTestRunner()
+    results = await runner.run_test_suite(scenarios)
+
+    return results

atomizer-dashboard/backend/api/routes/spec.py

@@ -0,0 +1,646 @@
+"""
+AtomizerSpec v2.0 API Endpoints
+
+REST API for managing AtomizerSpec configurations.
+All spec modifications flow through these endpoints.
+
+Endpoints:
+- GET /studies/{study_id}/spec - Get full spec
+- PUT /studies/{study_id}/spec - Replace entire spec
+- PATCH /studies/{study_id}/spec - Partial update
+- POST /studies/{study_id}/spec/validate - Validate spec
+- POST /studies/{study_id}/spec/nodes - Add node
+- PATCH /studies/{study_id}/spec/nodes/{node_id} - Update node
+- DELETE /studies/{study_id}/spec/nodes/{node_id} - Delete node
+- POST /studies/{study_id}/spec/custom-functions - Add custom extractor
+- WebSocket /studies/{study_id}/spec/sync - Real-time sync
+"""
+
+from fastapi import APIRouter, HTTPException, WebSocket, WebSocketDisconnect, Query
+from fastapi.responses import JSONResponse
+from pydantic import BaseModel, Field
+from pathlib import Path
+from typing import Any, Dict, List, Optional, Union
+import json
+import sys
+import asyncio
+
+# Add project root to path
+sys.path.append(str(Path(__file__).parent.parent.parent.parent.parent))
+
+from api.services.spec_manager import (
+    SpecManager,
+    SpecManagerError,
+    SpecNotFoundError,
+    SpecConflictError,
+    get_spec_manager,
+)
+from optimization_engine.config.spec_models import (
+    AtomizerSpec,
+    ValidationReport,
+)
+from optimization_engine.config.spec_validator import SpecValidationError
+
+router = APIRouter(prefix="/studies/{study_id:path}/spec", tags=["spec"])
+
+# Base studies directory
+STUDIES_DIR = Path(__file__).parent.parent.parent.parent.parent / "studies"
+
+
+# ============================================================================
+# Request/Response Models
+# ============================================================================
+
+class SpecPatchRequest(BaseModel):
+    """Request for patching a spec field."""
+    path: str = Field(..., description="JSONPath to the field (e.g., 'objectives[0].weight')")
+    value: Any = Field(..., description="New value")
+    modified_by: str = Field(default="api", description="Who is making the change")
+
+
+class NodeAddRequest(BaseModel):
+    """Request for adding a node."""
+    type: str = Field(..., description="Node type: designVar, extractor, objective, constraint")
+    data: Dict[str, Any] = Field(..., description="Node data")
+    modified_by: str = Field(default="canvas", description="Who is making the change")
+
+
+class NodeUpdateRequest(BaseModel):
+    """Request for updating a node."""
+    updates: Dict[str, Any] = Field(..., description="Fields to update")
+    modified_by: str = Field(default="canvas", description="Who is making the change")
+
+
+class CustomFunctionRequest(BaseModel):
+    """Request for adding a custom extractor function."""
+    name: str = Field(..., description="Function name")
+    code: str = Field(..., description="Python source code")
+    outputs: List[str] = Field(..., description="Output names")
+    description: Optional[str] = Field(default=None, description="Human-readable description")
+    modified_by: str = Field(default="claude", description="Who is making the change")
+
+
+class ExtractorValidationRequest(BaseModel):
+    """Request for validating custom extractor code."""
+    function_name: str = Field(default="extract", description="Expected function name")
+    source: str = Field(..., description="Python source code to validate")
+
+
+class SpecUpdateResponse(BaseModel):
+    """Response for spec modification operations."""
+    success: bool
+    hash: str
+    modified: str
+    modified_by: str
+
+
+class NodeAddResponse(BaseModel):
+    """Response for node add operation."""
+    success: bool
+    node_id: str
+    message: str
+
+
+class ValidationResponse(BaseModel):
+    """Response for validation endpoint."""
+    valid: bool
+    errors: List[Dict[str, Any]]
+    warnings: List[Dict[str, Any]]
+    summary: Dict[str, int]
+
+
+# ============================================================================
+# Helper Functions
+# ============================================================================
+
+def resolve_study_path(study_id: str) -> Path:
+    """Find study folder by scanning all topic directories.
+
+    Supports both formats:
+    - "study_name" - Will scan topic folders to find it
+    - "Topic/study_name" - Direct nested path (e.g., "M1_Mirror/m1_mirror_v1")
+    """
+    # Handle nested paths (e.g., "M1_Mirror/m1_mirror_cost_reduction_lateral")
+    if "/" in study_id:
+        nested_path = STUDIES_DIR / study_id.replace("/", "\\")  # Handle Windows paths
+        if nested_path.exists() and nested_path.is_dir():
+            return nested_path
+        # Also try with forward slashes (Path handles both)
+        nested_path = STUDIES_DIR / study_id
+        if nested_path.exists() and nested_path.is_dir():
+            return nested_path
+
+    # Direct path (flat structure)
+    direct_path = STUDIES_DIR / study_id
+    if direct_path.exists() and direct_path.is_dir():
+        return direct_path
+
+    # Scan topic folders (nested structure)
+    for topic_dir in STUDIES_DIR.iterdir():
+        if topic_dir.is_dir() and not topic_dir.name.startswith('.'):
+            study_dir = topic_dir / study_id
+            if study_dir.exists() and study_dir.is_dir():
+                return study_dir
+
+    raise HTTPException(status_code=404, detail=f"Study not found: {study_id}")
+
+
+def get_manager(study_id: str) -> SpecManager:
+    """Get SpecManager for a study."""
+    study_path = resolve_study_path(study_id)
+    return get_spec_manager(study_path)
+
+
+# ============================================================================
+# REST Endpoints
+# ============================================================================
+
+@router.get("", response_model=None)
+async def get_spec(study_id: str):
+    """
+    Get the full AtomizerSpec for a study.
+
+    Returns the complete spec JSON with all design variables, extractors,
+    objectives, constraints, and canvas state.
+    """
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(
+            status_code=404,
+            detail=f"No AtomizerSpec found for study '{study_id}'. Use migration or create new spec."
+        )
+
+    try:
+        spec = manager.load()
+        return spec.model_dump(mode='json')
+    except SpecValidationError as e:
+        # Return spec even if invalid, but include validation info
+        raw = manager.load_raw()
+        return JSONResponse(
+            status_code=200,
+            content={
+                **raw,
+                "_validation_error": str(e)
+            }
+        )
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get("/raw")
+async def get_spec_raw(study_id: str):
+    """
+    Get the raw spec JSON without validation.
+
+    Useful for debugging or when spec is invalid.
+    """
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(status_code=404, detail=f"No spec found for study '{study_id}'")
+
+    try:
+        return manager.load_raw()
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.get("/hash")
+async def get_spec_hash(study_id: str):
+    """Get the current spec hash for conflict detection."""
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(status_code=404, detail=f"No spec found for study '{study_id}'")
+
+    return {"hash": manager.get_hash()}
+
+
+@router.put("", response_model=SpecUpdateResponse)
+async def replace_spec(
+    study_id: str,
+    spec: Dict[str, Any],
+    modified_by: str = Query(default="api"),
+    expected_hash: Optional[str] = Query(default=None)
+):
+    """
+    Replace the entire spec.
+
+    Validates the new spec before saving. Optionally check for conflicts
+    using expected_hash parameter.
+    """
+    manager = get_manager(study_id)
+
+    try:
+        new_hash = manager.save(spec, modified_by=modified_by, expected_hash=expected_hash)
+        reloaded = manager.load()
+        return SpecUpdateResponse(
+            success=True,
+            hash=new_hash,
+            modified=reloaded.meta.modified or "",
+            modified_by=modified_by
+        )
+    except SpecConflictError as e:
+        raise HTTPException(
+            status_code=409,
+            detail={
+                "message": str(e),
+                "current_hash": e.current_hash
+            }
+        )
+    except SpecValidationError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.patch("", response_model=SpecUpdateResponse)
+async def patch_spec(study_id: str, request: SpecPatchRequest):
+    """
+    Partial update to spec using JSONPath.
+
+    Example paths:
+    - "objectives[0].weight" - Update objective weight
+    - "design_variables[1].bounds.max" - Update DV bound
+    - "meta.description" - Update description
+    """
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(status_code=404, detail=f"No spec found for study '{study_id}'")
+
+    try:
+        spec = manager.patch(request.path, request.value, modified_by=request.modified_by)
+        return SpecUpdateResponse(
+            success=True,
+            hash=manager.get_hash(),
+            modified=spec.meta.modified or "",
+            modified_by=request.modified_by
+        )
+    except SpecValidationError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.post("/validate", response_model=ValidationResponse)
+async def validate_spec(study_id: str):
+    """
+    Validate the spec and return detailed report.
+
+    Returns errors, warnings, and summary of the spec contents.
+    """
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(status_code=404, detail=f"No spec found for study '{study_id}'")
+
+    try:
+        report = manager.validate_and_report()
+        return ValidationResponse(
+            valid=report.valid,
+            errors=[e.model_dump() for e in report.errors],
+            warnings=[w.model_dump() for w in report.warnings],
+            summary=report.summary.model_dump()
+        )
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+# ============================================================================
+# Node CRUD Endpoints
+# ============================================================================
+
+@router.post("/nodes", response_model=NodeAddResponse)
+async def add_node(study_id: str, request: NodeAddRequest):
+    """
+    Add a new node to the spec.
+
+    Supported types: designVar, extractor, objective, constraint
+    """
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(status_code=404, detail=f"No spec found for study '{study_id}'")
+
+    valid_types = ["designVar", "extractor", "objective", "constraint"]
+    if request.type not in valid_types:
+        raise HTTPException(
+            status_code=400,
+            detail=f"Invalid node type '{request.type}'. Valid: {valid_types}"
+        )
+
+    try:
+        node_id = manager.add_node(request.type, request.data, modified_by=request.modified_by)
+        return NodeAddResponse(
+            success=True,
+            node_id=node_id,
+            message=f"Added {request.type} node: {node_id}"
+        )
+    except SpecValidationError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.patch("/nodes/{node_id}")
+async def update_node(study_id: str, node_id: str, request: NodeUpdateRequest):
+    """Update an existing node's properties."""
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(status_code=404, detail=f"No spec found for study '{study_id}'")
+
+    try:
+        manager.update_node(node_id, request.updates, modified_by=request.modified_by)
+        return {"success": True, "message": f"Updated node {node_id}"}
+    except SpecManagerError as e:
+        raise HTTPException(status_code=404, detail=str(e))
+    except SpecValidationError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.delete("/nodes/{node_id}")
+async def delete_node(
+    study_id: str,
+    node_id: str,
+    modified_by: str = Query(default="canvas")
+):
+    """
+    Delete a node and all edges referencing it.
+
+    Use with caution - this will also remove any objectives or constraints
+    that reference a deleted extractor.
+    """
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(status_code=404, detail=f"No spec found for study '{study_id}'")
+
+    try:
+        manager.remove_node(node_id, modified_by=modified_by)
+        return {"success": True, "message": f"Removed node {node_id}"}
+    except SpecManagerError as e:
+        raise HTTPException(status_code=404, detail=str(e))
+    except SpecValidationError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+# ============================================================================
+# Custom Function Endpoint
+# ============================================================================
+
+@router.post("/custom-functions", response_model=NodeAddResponse)
+async def add_custom_function(study_id: str, request: CustomFunctionRequest):
+    """
+    Add a custom Python function as an extractor.
+
+    The function will be available in the optimization workflow.
+    Claude can use this to add new physics extraction logic.
+    """
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(status_code=404, detail=f"No spec found for study '{study_id}'")
+
+    try:
+        extractor_id = manager.add_custom_function(
+            name=request.name,
+            code=request.code,
+            outputs=request.outputs,
+            description=request.description,
+            modified_by=request.modified_by
+        )
+        return NodeAddResponse(
+            success=True,
+            node_id=extractor_id,
+            message=f"Added custom extractor: {request.name}"
+        )
+    except SpecValidationError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+# Separate router for non-study-specific endpoints
+validate_router = APIRouter(prefix="/spec", tags=["spec"])
+
+
+@validate_router.post("/validate-extractor")
+async def validate_custom_extractor(request: ExtractorValidationRequest):
+    """
+    Validate custom extractor Python code.
+
+    Checks syntax, security patterns, and function signature.
+    Does not require a study - can be used before adding to spec.
+    """
+    try:
+        from optimization_engine.extractors.custom_extractor_loader import (
+            validate_extractor_code,
+            ExtractorSecurityError,
+        )
+
+        try:
+            is_valid, errors = validate_extractor_code(request.source, request.function_name)
+            return {
+                "valid": is_valid,
+                "errors": errors
+            }
+        except ExtractorSecurityError as e:
+            return {
+                "valid": False,
+                "errors": [str(e)]
+            }
+
+    except ImportError as e:
+        raise HTTPException(
+            status_code=500,
+            detail=f"Custom extractor loader not available: {e}"
+        )
+
+
+# ============================================================================
+# Edge Endpoints
+# ============================================================================
+
+@router.post("/edges")
+async def add_edge(
+    study_id: str,
+    source: str = Query(..., description="Source node ID"),
+    target: str = Query(..., description="Target node ID"),
+    modified_by: str = Query(default="canvas")
+):
+    """Add a canvas edge between two nodes."""
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(status_code=404, detail=f"No spec found for study '{study_id}'")
+
+    try:
+        manager.add_edge(source, target, modified_by=modified_by)
+        return {"success": True, "message": f"Added edge {source} -> {target}"}
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+@router.delete("/edges")
+async def delete_edge(
+    study_id: str,
+    source: str = Query(..., description="Source node ID"),
+    target: str = Query(..., description="Target node ID"),
+    modified_by: str = Query(default="canvas")
+):
+    """Remove a canvas edge."""
+    manager = get_manager(study_id)
+
+    if not manager.exists():
+        raise HTTPException(status_code=404, detail=f"No spec found for study '{study_id}'")
+
+    try:
+        manager.remove_edge(source, target, modified_by=modified_by)
+        return {"success": True, "message": f"Removed edge {source} -> {target}"}
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+
+# ============================================================================
+# WebSocket Sync Endpoint
+# ============================================================================
+
+class WebSocketSubscriber:
+    """WebSocket subscriber adapter."""
+
+    def __init__(self, websocket: WebSocket):
+        self.websocket = websocket
+
+    async def send_json(self, data: Dict[str, Any]) -> None:
+        await self.websocket.send_json(data)
+
+
+@router.websocket("/sync")
+async def websocket_sync(websocket: WebSocket, study_id: str):
+    """
+    WebSocket endpoint for real-time spec sync.
+
+    Clients receive notifications when spec changes:
+    - spec_updated: Spec was modified
+    - node_added: New node added
+    - node_removed: Node removed
+    - validation_error: Validation failed
+    """
+    await websocket.accept()
+
+    manager = get_manager(study_id)
+    subscriber = WebSocketSubscriber(websocket)
+
+    # Subscribe to updates
+    manager.subscribe(subscriber)
+
+    try:
+        # Send initial connection ack
+        await websocket.send_json({
+            "type": "connection_ack",
+            "study_id": study_id,
+            "hash": manager.get_hash() if manager.exists() else None,
+            "message": "Connected to spec sync"
+        })
+
+        # Keep connection alive and handle client messages
+        while True:
+            try:
+                data = await asyncio.wait_for(
+                    websocket.receive_json(),
+                    timeout=30.0  # Heartbeat interval
+                )
+
+                # Handle client messages
+                msg_type = data.get("type")
+
+                if msg_type == "ping":
+                    await websocket.send_json({"type": "pong"})
+
+                elif msg_type == "patch_node":
+                    # Client requests node update
+                    try:
+                        manager.update_node(
+                            data["node_id"],
+                            data.get("data", {}),
+                            modified_by=data.get("modified_by", "canvas")
+                        )
+                    except Exception as e:
+                        await websocket.send_json({
+                            "type": "error",
+                            "message": str(e)
+                        })
+
+                elif msg_type == "update_position":
+                    # Client updates node position
+                    try:
+                        manager.update_node_position(
+                            data["node_id"],
+                            data["position"],
+                            modified_by=data.get("modified_by", "canvas")
+                        )
+                    except Exception as e:
+                        await websocket.send_json({
+                            "type": "error",
+                            "message": str(e)
+                        })
+
+            except asyncio.TimeoutError:
+                # Send heartbeat
+                await websocket.send_json({"type": "heartbeat"})
+
+    except WebSocketDisconnect:
+        pass
+    finally:
+        manager.unsubscribe(subscriber)
+
+
+# ============================================================================
+# Create/Initialize Spec
+# ============================================================================
+
+@router.post("/create")
+async def create_spec(
+    study_id: str,
+    spec: Dict[str, Any],
+    modified_by: str = Query(default="api")
+):
+    """
+    Create a new spec for a study.
+
+    Use this when migrating from old config or creating a new study.
+    Will fail if spec already exists (use PUT to replace).
+    """
+    manager = get_manager(study_id)
+
+    if manager.exists():
+        raise HTTPException(
+            status_code=409,
+            detail=f"Spec already exists for '{study_id}'. Use PUT to replace."
+        )
+
+    try:
+        # Ensure meta fields are set
+        if "meta" not in spec:
+            spec["meta"] = {}
+        spec["meta"]["created_by"] = modified_by
+
+        new_hash = manager.save(spec, modified_by=modified_by)
+        return {
+            "success": True,
+            "hash": new_hash,
+            "message": f"Created spec for {study_id}"
+        }
+    except SpecValidationError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))

atomizer-dashboard/backend/api/services/__init__.py

@@ -3,5 +3,13 @@ Atomizer Dashboard Services
 """
 
 from .claude_agent import AtomizerClaudeAgent
+from .spec_manager import SpecManager, SpecManagerError, SpecNotFoundError, SpecConflictError, get_spec_manager
 
-__all__ = ['AtomizerClaudeAgent']
+__all__ = [
+    'AtomizerClaudeAgent',
+    'SpecManager',
+    'SpecManagerError',
+    'SpecNotFoundError',
+    'SpecConflictError',
+    'get_spec_manager',
+]

atomizer-dashboard/backend/api/services/claude_readme.py

@@ -0,0 +1,396 @@
+"""
+Claude README Generator Service
+
+Generates intelligent README.md files for optimization studies
+using Claude Code CLI (not API) with study context from AtomizerSpec.
+"""
+
+import asyncio
+import json
+import subprocess
+from datetime import datetime
+from pathlib import Path
+from typing import Any, Dict, Optional
+
+# Base directory
+ATOMIZER_ROOT = Path(__file__).parent.parent.parent.parent.parent
+
+# Load skill prompt
+SKILL_PATH = ATOMIZER_ROOT / ".claude" / "skills" / "modules" / "study-readme-generator.md"
+
+
+def load_skill_prompt() -> str:
+    """Load the README generator skill prompt."""
+    if SKILL_PATH.exists():
+        return SKILL_PATH.read_text(encoding="utf-8")
+    return ""
+
+
+class ClaudeReadmeGenerator:
+    """Generate README.md files using Claude Code CLI."""
+
+    def __init__(self):
+        self.skill_prompt = load_skill_prompt()
+
+    def generate_readme(
+        self,
+        study_name: str,
+        spec: Dict[str, Any],
+        context_files: Optional[Dict[str, str]] = None,
+        topic: Optional[str] = None,
+    ) -> str:
+        """
+        Generate a README.md for a study using Claude Code CLI.
+
+        Args:
+            study_name: Name of the study
+            spec: Full AtomizerSpec v2.0 dict
+            context_files: Optional dict of {filename: content} for context
+            topic: Optional topic folder name
+
+        Returns:
+            Generated README.md content
+        """
+        # Build context for Claude
+        context = self._build_context(study_name, spec, context_files, topic)
+
+        # Build the prompt
+        prompt = self._build_prompt(context)
+
+        try:
+            # Run Claude Code CLI synchronously
+            result = self._run_claude_cli(prompt)
+
+            # Extract markdown content from response
+            readme_content = self._extract_markdown(result)
+
+            if readme_content:
+                return readme_content
+
+            # If no markdown found, return the whole response
+            return result if result else self._generate_fallback_readme(study_name, spec)
+
+        except Exception as e:
+            print(f"Claude CLI error: {e}")
+            return self._generate_fallback_readme(study_name, spec)
+
+    async def generate_readme_async(
+        self,
+        study_name: str,
+        spec: Dict[str, Any],
+        context_files: Optional[Dict[str, str]] = None,
+        topic: Optional[str] = None,
+    ) -> str:
+        """Async version of generate_readme."""
+        # Run in thread pool to not block
+        loop = asyncio.get_event_loop()
+        return await loop.run_in_executor(
+            None, lambda: self.generate_readme(study_name, spec, context_files, topic)
+        )
+
+    def _run_claude_cli(self, prompt: str) -> str:
+        """Run Claude Code CLI and get response."""
+        try:
+            # Use claude CLI with --print flag for non-interactive output
+            result = subprocess.run(
+                ["claude", "--print", prompt],
+                capture_output=True,
+                text=True,
+                timeout=120,  # 2 minute timeout
+                cwd=str(ATOMIZER_ROOT),
+            )
+
+            if result.returncode != 0:
+                error_msg = result.stderr or "Unknown error"
+                raise Exception(f"Claude CLI error: {error_msg}")
+
+            return result.stdout.strip()
+
+        except subprocess.TimeoutExpired:
+            raise Exception("Request timed out")
+        except FileNotFoundError:
+            raise Exception("Claude CLI not found. Make sure 'claude' is in PATH.")
+
+    def _build_context(
+        self,
+        study_name: str,
+        spec: Dict[str, Any],
+        context_files: Optional[Dict[str, str]],
+        topic: Optional[str],
+    ) -> Dict[str, Any]:
+        """Build the context object for Claude."""
+        meta = spec.get("meta", {})
+        model = spec.get("model", {})
+        introspection = model.get("introspection", {}) or {}
+
+        context = {
+            "study_name": study_name,
+            "topic": topic or meta.get("topic", "Other"),
+            "description": meta.get("description", ""),
+            "created": meta.get("created", datetime.now().isoformat()),
+            "status": meta.get("status", "draft"),
+            "design_variables": spec.get("design_variables", []),
+            "extractors": spec.get("extractors", []),
+            "objectives": spec.get("objectives", []),
+            "constraints": spec.get("constraints", []),
+            "optimization": spec.get("optimization", {}),
+            "introspection": {
+                "mass_kg": introspection.get("mass_kg"),
+                "volume_mm3": introspection.get("volume_mm3"),
+                "solver_type": introspection.get("solver_type"),
+                "expressions": introspection.get("expressions", []),
+                "expressions_count": len(introspection.get("expressions", [])),
+            },
+            "model_files": {
+                "sim": model.get("sim", {}).get("path") if model.get("sim") else None,
+                "prt": model.get("prt", {}).get("path") if model.get("prt") else None,
+                "fem": model.get("fem", {}).get("path") if model.get("fem") else None,
+            },
+        }
+
+        # Add context files if provided
+        if context_files:
+            context["context_files"] = context_files
+
+        return context
+
+    def _build_prompt(self, context: Dict[str, Any]) -> str:
+        """Build the prompt for Claude CLI."""
+
+        # Build context files section if available
+        context_files_section = ""
+        if context.get("context_files"):
+            context_files_section = "\n\n## User-Provided Context Files\n\nIMPORTANT: Use this information to understand the optimization goals, design variables, objectives, and constraints:\n\n"
+            for filename, content in context.get("context_files", {}).items():
+                context_files_section += f"### {filename}\n```\n{content}\n```\n\n"
+
+        # Remove context_files from JSON dump to avoid duplication
+        context_for_json = {k: v for k, v in context.items() if k != "context_files"}
+
+        prompt = f"""Generate a README.md for this FEA optimization study.
+
+## Study Technical Data
+
+```json
+{json.dumps(context_for_json, indent=2, default=str)}
+```
+{context_files_section}
+## Requirements
+
+1. Use the EXACT values from the technical data - no placeholders
+2. If context files are provided, extract:
+   - Design variable bounds (min/max)
+   - Optimization objectives (minimize/maximize what)
+   - Constraints (stress limits, etc.)
+   - Any specific requirements mentioned
+
+3. Format the README with these sections:
+   - Title (# Study Name)
+   - Overview (topic, date, status, description from context)
+   - Engineering Problem (what we're optimizing and why - from context files)
+   - Model Information (mass, solver, files)
+   - Design Variables (if context specifies bounds, include them in a table)
+   - Optimization Objectives (from context files)
+   - Constraints (from context files)
+   - Expressions Found (table of discovered expressions, highlight candidates)
+   - Next Steps (what needs to be configured)
+
+4. Keep it professional and concise
+5. Use proper markdown table formatting
+6. Include units where applicable
+7. For expressions table, show: name, value, units, is_candidate
+
+Generate ONLY the README.md content in markdown format, no explanations:"""
+
+        return prompt
+
+    def _extract_markdown(self, response: str) -> Optional[str]:
+        """Extract markdown content from Claude response."""
+        if not response:
+            return None
+
+        # If response starts with #, it's already markdown
+        if response.strip().startswith("#"):
+            return response.strip()
+
+        # Try to find markdown block
+        if "```markdown" in response:
+            start = response.find("```markdown") + len("```markdown")
+            end = response.find("```", start)
+            if end > start:
+                return response[start:end].strip()
+
+        if "```md" in response:
+            start = response.find("```md") + len("```md")
+            end = response.find("```", start)
+            if end > start:
+                return response[start:end].strip()
+
+        # Look for first # heading
+        lines = response.split("\n")
+        for i, line in enumerate(lines):
+            if line.strip().startswith("# "):
+                return "\n".join(lines[i:]).strip()
+
+        return None
+
+    def _generate_fallback_readme(self, study_name: str, spec: Dict[str, Any]) -> str:
+        """Generate a basic README if Claude fails."""
+        meta = spec.get("meta", {})
+        model = spec.get("model", {})
+        introspection = model.get("introspection", {}) or {}
+        dvs = spec.get("design_variables", [])
+        objs = spec.get("objectives", [])
+        cons = spec.get("constraints", [])
+        opt = spec.get("optimization", {})
+        expressions = introspection.get("expressions", [])
+
+        lines = [
+            f"# {study_name.replace('_', ' ').title()}",
+            "",
+            f"**Topic**: {meta.get('topic', 'Other')}",
+            f"**Created**: {meta.get('created', 'Unknown')[:10] if meta.get('created') else 'Unknown'}",
+            f"**Status**: {meta.get('status', 'draft')}",
+            "",
+        ]
+
+        if meta.get("description"):
+            lines.extend([meta["description"], ""])
+
+        # Model Information
+        lines.extend(
+            [
+                "## Model Information",
+                "",
+            ]
+        )
+
+        if introspection.get("mass_kg"):
+            lines.append(f"- **Mass**: {introspection['mass_kg']:.2f} kg")
+
+        sim_path = model.get("sim", {}).get("path") if model.get("sim") else None
+        if sim_path:
+            lines.append(f"- **Simulation**: {sim_path}")
+
+        lines.append("")
+
+        # Expressions Found
+        if expressions:
+            lines.extend(
+                [
+                    "## Expressions Found",
+                    "",
+                    "| Name | Value | Units | Candidate |",
+                    "|------|-------|-------|-----------|",
+                ]
+            )
+            for expr in expressions:
+                is_candidate = "✓" if expr.get("is_candidate") else ""
+                value = f"{expr.get('value', '-')}"
+                units = expr.get("units", "-")
+                lines.append(f"| {expr.get('name', '-')} | {value} | {units} | {is_candidate} |")
+            lines.append("")
+
+        # Design Variables (if configured)
+        if dvs:
+            lines.extend(
+                [
+                    "## Design Variables",
+                    "",
+                    "| Variable | Expression | Range | Units |",
+                    "|----------|------------|-------|-------|",
+                ]
+            )
+            for dv in dvs:
+                bounds = dv.get("bounds", {})
+                units = dv.get("units", "-")
+                lines.append(
+                    f"| {dv.get('name', 'Unknown')} | "
+                    f"{dv.get('expression_name', '-')} | "
+                    f"[{bounds.get('min', '-')}, {bounds.get('max', '-')}] | "
+                    f"{units} |"
+                )
+            lines.append("")
+
+        # Objectives
+        if objs:
+            lines.extend(
+                [
+                    "## Objectives",
+                    "",
+                    "| Objective | Direction | Weight |",
+                    "|-----------|-----------|--------|",
+                ]
+            )
+            for obj in objs:
+                lines.append(
+                    f"| {obj.get('name', 'Unknown')} | "
+                    f"{obj.get('direction', 'minimize')} | "
+                    f"{obj.get('weight', 1.0)} |"
+                )
+            lines.append("")
+
+        # Constraints
+        if cons:
+            lines.extend(
+                [
+                    "## Constraints",
+                    "",
+                    "| Constraint | Condition | Threshold |",
+                    "|------------|-----------|-----------|",
+                ]
+            )
+            for con in cons:
+                lines.append(
+                    f"| {con.get('name', 'Unknown')} | "
+                    f"{con.get('operator', '<=')} | "
+                    f"{con.get('threshold', '-')} |"
+                )
+            lines.append("")
+
+        # Algorithm
+        algo = opt.get("algorithm", {})
+        budget = opt.get("budget", {})
+        lines.extend(
+            [
+                "## Methodology",
+                "",
+                f"- **Algorithm**: {algo.get('type', 'TPE')}",
+                f"- **Max Trials**: {budget.get('max_trials', 100)}",
+                "",
+            ]
+        )
+
+        # Next Steps
+        lines.extend(
+            [
+                "## Next Steps",
+                "",
+            ]
+        )
+
+        if not dvs:
+            lines.append("- [ ] Configure design variables from discovered expressions")
+        if not objs:
+            lines.append("- [ ] Define optimization objectives")
+        if not dvs and not objs:
+            lines.append("- [ ] Open in Canvas Builder to complete configuration")
+        else:
+            lines.append("- [ ] Run baseline solve to validate setup")
+            lines.append("- [ ] Finalize study to move to studies folder")
+
+        lines.append("")
+
+        return "\n".join(lines)
+
+
+# Singleton instance
+_generator: Optional[ClaudeReadmeGenerator] = None
+
+
+def get_readme_generator() -> ClaudeReadmeGenerator:
+    """Get the singleton README generator instance."""
+    global _generator
+    if _generator is None:
+        _generator = ClaudeReadmeGenerator()
+    return _generator

atomizer-dashboard/backend/api/services/context_builder.py

@@ -26,6 +26,7 @@ class ContextBuilder:
         study_id: Optional[str] = None,
         conversation_history: Optional[List[Dict[str, Any]]] = None,
         canvas_state: Optional[Dict[str, Any]] = None,
+        spec_path: Optional[str] = None,
     ) -> str:
         """
         Build full system prompt with context.
@@ -35,6 +36,7 @@ class ContextBuilder:
             study_id: Optional study name to provide context for
             conversation_history: Optional recent messages for continuity
             canvas_state: Optional canvas state (nodes, edges) from the UI
+            spec_path: Optional path to the atomizer_spec.json file
 
         Returns:
             Complete system prompt string
@@ -43,7 +45,11 @@ class ContextBuilder:
 
         # Canvas context takes priority - if user is working on a canvas, include it
         if canvas_state:
-            parts.append(self._canvas_context(canvas_state))
+            node_count = len(canvas_state.get("nodes", []))
+            print(f"[ContextBuilder] Including canvas context with {node_count} nodes")
+            parts.append(self._canvas_context(canvas_state, spec_path))
+        else:
+            print("[ContextBuilder] No canvas state provided")
 
         if study_id:
             parts.append(self._study_context(study_id))
@@ -53,7 +59,7 @@ class ContextBuilder:
         if conversation_history:
             parts.append(self._conversation_context(conversation_history))
 
-        parts.append(self._mode_instructions(mode))
+        parts.append(self._mode_instructions(mode, spec_path))
 
         return "\n\n---\n\n".join(parts)
 
@@ -91,7 +97,117 @@ Important guidelines:
 
         context = f"# Current Study: {study_id}\n\n"
 
-        # Load configuration
+        # Check for AtomizerSpec v2.0 first (preferred)
+        spec_path = study_dir / "1_setup" / "atomizer_spec.json"
+        if not spec_path.exists():
+            spec_path = study_dir / "atomizer_spec.json"
+
+        if spec_path.exists():
+            context += self._spec_context(spec_path)
+        else:
+            # Fall back to legacy optimization_config.json
+            context += self._legacy_config_context(study_dir)
+
+        # Check for results
+        db_path = study_dir / "3_results" / "study.db"
+        if db_path.exists():
+            try:
+                conn = sqlite3.connect(db_path)
+                count = conn.execute(
+                    "SELECT COUNT(*) FROM trials WHERE state = 'COMPLETE'"
+                ).fetchone()[0]
+
+                best = conn.execute("""
+                    SELECT MIN(tv.value) FROM trial_values tv
+                    JOIN trials t ON tv.trial_id = t.trial_id
+                    WHERE t.state = 'COMPLETE'
+                """).fetchone()[0]
+
+                context += f"\n## Results Status\n\n"
+                context += f"- **Trials completed**: {count}\n"
+                if best is not None:
+                    context += f"- **Best objective**: {best:.6f}\n"
+
+                conn.close()
+            except Exception:
+                pass
+
+        return context
+
+    def _spec_context(self, spec_path: Path) -> str:
+        """Build context from AtomizerSpec v2.0 file"""
+        context = "**Format**: AtomizerSpec v2.0\n\n"
+
+        try:
+            with open(spec_path) as f:
+                spec = json.load(f)
+
+            context += "## Configuration\n\n"
+
+            # Design variables
+            dvs = spec.get("design_variables", [])
+            if dvs:
+                context += "**Design Variables:**\n"
+                for dv in dvs[:10]:
+                    bounds = dv.get("bounds", {})
+                    bound_str = f"[{bounds.get('min', '?')}, {bounds.get('max', '?')}]"
+                    enabled = "✓" if dv.get("enabled", True) else "✗"
+                    context += f"- {dv.get('name', 'unnamed')}: {bound_str} {enabled}\n"
+                if len(dvs) > 10:
+                    context += f"- ... and {len(dvs) - 10} more\n"
+
+            # Extractors
+            extractors = spec.get("extractors", [])
+            if extractors:
+                context += "\n**Extractors:**\n"
+                for ext in extractors:
+                    ext_type = ext.get("type", "unknown")
+                    outputs = ext.get("outputs", [])
+                    output_names = [o.get("name", "?") for o in outputs[:3]]
+                    builtin = "builtin" if ext.get("builtin", True) else "custom"
+                    context += f"- {ext.get('name', 'unnamed')} ({ext_type}, {builtin}): outputs {output_names}\n"
+
+            # Objectives
+            objs = spec.get("objectives", [])
+            if objs:
+                context += "\n**Objectives:**\n"
+                for obj in objs:
+                    direction = obj.get("direction", "minimize")
+                    weight = obj.get("weight", 1.0)
+                    context += f"- {obj.get('name', 'unnamed')} ({direction}, weight={weight})\n"
+
+            # Constraints
+            constraints = spec.get("constraints", [])
+            if constraints:
+                context += "\n**Constraints:**\n"
+                for c in constraints:
+                    op = c.get("operator", "<=")
+                    thresh = c.get("threshold", "?")
+                    context += f"- {c.get('name', 'unnamed')}: {op} {thresh}\n"
+
+            # Optimization settings
+            opt = spec.get("optimization", {})
+            algo = opt.get("algorithm", {})
+            budget = opt.get("budget", {})
+            method = algo.get("type", "TPE")
+            max_trials = budget.get("max_trials", "not set")
+            context += f"\n**Optimization**: {method}, max_trials: {max_trials}\n"
+
+            # Surrogate
+            surrogate = opt.get("surrogate", {})
+            if surrogate.get("enabled"):
+                sur_type = surrogate.get("type", "gaussian_process")
+                context += f"**Surrogate**: {sur_type} enabled\n"
+
+        except (json.JSONDecodeError, IOError) as e:
+            context += f"\n*Spec file exists but could not be parsed: {e}*\n"
+
+        return context
+
+    def _legacy_config_context(self, study_dir: Path) -> str:
+        """Build context from legacy optimization_config.json"""
+        context = "**Format**: Legacy optimization_config.json\n\n"
+
         config_path = study_dir / "1_setup" / "optimization_config.json"
         if not config_path.exists():
             config_path = study_dir / "optimization_config.json"
@@ -135,30 +251,8 @@ Important guidelines:
 
             except (json.JSONDecodeError, IOError) as e:
                 context += f"\n*Config file exists but could not be parsed: {e}*\n"
-
-        # Check for results
-        db_path = study_dir / "3_results" / "study.db"
-        if db_path.exists():
-            try:
-                conn = sqlite3.connect(db_path)
-                count = conn.execute(
-                    "SELECT COUNT(*) FROM trials WHERE state = 'COMPLETE'"
-                ).fetchone()[0]
-
-                best = conn.execute("""
-                    SELECT MIN(tv.value) FROM trial_values tv
-                    JOIN trials t ON tv.trial_id = t.trial_id
-                    WHERE t.state = 'COMPLETE'
-                """).fetchone()[0]
-
-                context += f"\n## Results Status\n\n"
-                context += f"- **Trials completed**: {count}\n"
-                if best is not None:
-                    context += f"- **Best objective**: {best:.6f}\n"
-
-                conn.close()
-            except Exception:
-                pass
+        else:
+            context += "*No configuration file found.*\n"
 
         return context
 
@@ -206,7 +300,7 @@ Important guidelines:
 
         return context
 
-    def _canvas_context(self, canvas_state: Dict[str, Any]) -> str:
+    def _canvas_context(self, canvas_state: Dict[str, Any], spec_path: Optional[str] = None) -> str:
         """
         Build context from canvas state (nodes and edges).
 
@@ -225,6 +319,8 @@ Important guidelines:
         context += f"**Study Name**: {study_name}\n"
         if study_path:
             context += f"**Study Path**: {study_path}\n"
+        if spec_path:
+            context += f"**Spec File**: `{spec_path}`\n"
         context += "\n"
 
         # Group nodes by type
@@ -346,43 +442,100 @@ Important guidelines:
         context += f"Total edges: {len(edges)}\n"
         context += "Flow: Design Variables → Model → Solver → Extractors → Objectives/Constraints → Algorithm\n\n"
 
-        # Canvas modification instructions
-        context += """## Canvas Modification Tools
-
-When the user asks to modify the canvas (add/remove nodes, change values), use these MCP tools:
-- `canvas_add_node` - Add a new node (designVar, extractor, objective, constraint)
-- `canvas_update_node` - Update node properties (bounds, weights, names)
-- `canvas_remove_node` - Remove a node from the canvas
-- `canvas_connect_nodes` - Create an edge between nodes
-
-**Example user requests you can handle:**
-- "Add a design variable called hole_diameter with range 5-15 mm" → Use canvas_add_node
-- "Change the weight of wfe_40_20 to 8" → Use canvas_update_node
-- "Remove the constraint node" → Use canvas_remove_node
-- "Connect the new extractor to the objective" → Use canvas_connect_nodes
-
-Always respond with confirmation of changes made to the canvas.
-"""
-
+        # Instructions will be in _mode_instructions based on spec_path
         return context
 
-    def _mode_instructions(self, mode: str) -> str:
+    def _mode_instructions(self, mode: str, spec_path: Optional[str] = None) -> str:
         """Mode-specific instructions"""
         if mode == "power":
-            return """# Power Mode Instructions
+            instructions = """# Power Mode Instructions
 
-You have **full access** to Atomizer's codebase. You can:
-- Edit any file using `edit_file` tool
-- Create new files with `create_file` tool
-- Create new extractors with `create_extractor` tool
-- Run shell commands with `run_shell_command` tool
-- Search codebase with `search_codebase` tool
-- Commit and push changes
+You have **FULL ACCESS** to modify Atomizer studies. **DO NOT ASK FOR PERMISSION** - just do it.
 
-**Use these powers responsibly.** Always explain what you're doing and why.
+## CRITICAL: How to Modify the Spec
 
-For routine operations (list, status, run, analyze), use the standard tools.
 """
+            if spec_path:
+                instructions += f"""**The spec file is at**: `{spec_path}`
+
+When asked to add/modify/remove design variables, extractors, objectives, or constraints:
+1. **Read the spec file first** using the Read tool
+2. **Edit the spec file** using the Edit tool to make precise changes
+3. **Confirm what you changed** in your response
+
+### AtomizerSpec v2.0 Structure
+
+The spec has these main arrays you can modify:
+- `design_variables` - Parameters to optimize
+- `extractors` - Physics extraction functions  
+- `objectives` - What to minimize/maximize
+- `constraints` - Limits that must be satisfied
+
+### Example: Add a Design Variable
+
+To add a design variable called "thickness" with bounds [1, 10]:
+
+1. Read the spec: `Read({spec_path})`
+2. Find the `"design_variables": [...]` array
+3. Add a new entry like:
+```json
+{{
+  "id": "dv_thickness",
+  "name": "thickness",
+  "expression_name": "thickness",
+  "type": "continuous",
+  "bounds": {{"min": 1, "max": 10}},
+  "baseline": 5,
+  "units": "mm",
+  "enabled": true
+}}
+```
+4. Use Edit tool to insert this into the array
+
+### Example: Add an Objective
+
+To add a "minimize mass" objective:
+```json
+{{
+  "id": "obj_mass",
+  "name": "mass",
+  "direction": "minimize",
+  "weight": 1.0,
+  "source": {{
+    "extractor_id": "ext_mass",
+    "output_name": "mass"
+  }}
+}}
+```
+
+### Example: Add an Extractor
+
+To add a mass extractor:
+```json
+{{
+  "id": "ext_mass",
+  "name": "mass",
+  "type": "mass",
+  "builtin": true,
+  "outputs": [{{"name": "mass", "units": "kg"}}]
+}}
+```
+
+"""
+            else:
+                instructions += """No spec file is currently set. Ask the user which study they want to work with.
+
+"""
+
+            instructions += """## IMPORTANT Rules:
+- You have --dangerously-skip-permissions enabled
+- **ACT IMMEDIATELY** when asked to add/modify/remove things
+- Use the **Edit** tool to modify the spec file directly
+- Generate unique IDs like `dv_<name>`, `ext_<name>`, `obj_<name>`, `con_<name>`
+- Explain what you changed AFTER doing it, not before
+- Do NOT say "I need permission" - you already have it
+"""
+            return instructions
         else:
             return """# User Mode Instructions
 
@@ -393,20 +546,11 @@ You can help with optimization workflows:
 - Generate reports
 - Explain FEA concepts
 
-**For code modifications**, suggest switching to Power Mode.
+**For modifying studies**, the user needs to switch to Power Mode.
 
-Available tools:
-- `list_studies`, `get_study_status`, `create_study`
-- `run_optimization`, `stop_optimization`, `get_optimization_status`
-- `get_trial_data`, `analyze_convergence`, `compare_trials`, `get_best_design`
-- `generate_report`, `export_data`
-- `explain_physics`, `recommend_method`, `query_extractors`
-
-**Canvas Tools (for visual workflow builder):**
-- `validate_canvas_intent` - Validate a canvas-generated optimization intent
-- `execute_canvas_intent` - Create a study from a canvas intent
-- `interpret_canvas_intent` - Analyze intent and provide recommendations
-
-When you receive a message containing "INTENT:" followed by JSON, this is from the Canvas UI.
-Parse the intent and use the appropriate canvas tool to process it.
+In user mode you can:
+- Read and explain study configurations
+- Analyze optimization results
+- Provide recommendations
+- Answer questions about FEA and optimization
 """

atomizer-dashboard/backend/api/services/interview_engine.py

@@ -0,0 +1,454 @@
+"""
+Interview Engine - Guided Study Creation through Conversation
+
+Provides a structured interview flow for creating optimization studies.
+Claude uses this to gather information step-by-step, building a complete
+atomizer_spec.json through natural conversation.
+"""
+
+from typing import Dict, Any, List, Optional, Literal
+from dataclasses import dataclass, field
+from enum import Enum
+from datetime import datetime
+import json
+
+
+class InterviewState(str, Enum):
+    """Current phase of the interview"""
+    NOT_STARTED = "not_started"
+    GATHERING_BASICS = "gathering_basics"      # Name, description, goals
+    GATHERING_MODEL = "gathering_model"        # Model file, solver type
+    GATHERING_VARIABLES = "gathering_variables"  # Design variables
+    GATHERING_EXTRACTORS = "gathering_extractors"  # Physics extractors
+    GATHERING_OBJECTIVES = "gathering_objectives"  # Objectives
+    GATHERING_CONSTRAINTS = "gathering_constraints"  # Constraints
+    GATHERING_SETTINGS = "gathering_settings"  # Algorithm, trials
+    REVIEW = "review"                          # Review before creation
+    COMPLETED = "completed"
+
+
+@dataclass
+class InterviewData:
+    """Accumulated data from the interview"""
+    # Basics
+    study_name: Optional[str] = None
+    category: Optional[str] = None
+    description: Optional[str] = None
+    goals: List[str] = field(default_factory=list)
+
+    # Model
+    sim_file: Optional[str] = None
+    prt_file: Optional[str] = None
+    solver_type: str = "nastran"
+
+    # Design variables
+    design_variables: List[Dict[str, Any]] = field(default_factory=list)
+
+    # Extractors
+    extractors: List[Dict[str, Any]] = field(default_factory=list)
+
+    # Objectives
+    objectives: List[Dict[str, Any]] = field(default_factory=list)
+
+    # Constraints
+    constraints: List[Dict[str, Any]] = field(default_factory=list)
+
+    # Settings
+    algorithm: str = "TPE"
+    max_trials: int = 100
+
+    def to_spec(self) -> Dict[str, Any]:
+        """Convert interview data to atomizer_spec.json format"""
+        # Generate IDs for each element
+        dvs_with_ids = []
+        for i, dv in enumerate(self.design_variables):
+            dv_copy = dv.copy()
+            dv_copy['id'] = f"dv_{i+1:03d}"
+            dv_copy['canvas_position'] = {'x': 50, 'y': 100 + i * 80}
+            dvs_with_ids.append(dv_copy)
+
+        exts_with_ids = []
+        for i, ext in enumerate(self.extractors):
+            ext_copy = ext.copy()
+            ext_copy['id'] = f"ext_{i+1:03d}"
+            ext_copy['canvas_position'] = {'x': 400, 'y': 100 + i * 80}
+            exts_with_ids.append(ext_copy)
+
+        objs_with_ids = []
+        for i, obj in enumerate(self.objectives):
+            obj_copy = obj.copy()
+            obj_copy['id'] = f"obj_{i+1:03d}"
+            obj_copy['canvas_position'] = {'x': 750, 'y': 100 + i * 80}
+            objs_with_ids.append(obj_copy)
+
+        cons_with_ids = []
+        for i, con in enumerate(self.constraints):
+            con_copy = con.copy()
+            con_copy['id'] = f"con_{i+1:03d}"
+            con_copy['canvas_position'] = {'x': 750, 'y': 400 + i * 80}
+            cons_with_ids.append(con_copy)
+
+        return {
+            "meta": {
+                "version": "2.0",
+                "study_name": self.study_name or "untitled_study",
+                "description": self.description or "",
+                "created_at": datetime.now().isoformat(),
+                "created_by": "interview",
+                "modified_at": datetime.now().isoformat(),
+                "modified_by": "interview"
+            },
+            "model": {
+                "sim": {
+                    "path": self.sim_file or "",
+                    "solver": self.solver_type
+                }
+            },
+            "design_variables": dvs_with_ids,
+            "extractors": exts_with_ids,
+            "objectives": objs_with_ids,
+            "constraints": cons_with_ids,
+            "optimization": {
+                "algorithm": {
+                    "type": self.algorithm
+                },
+                "budget": {
+                    "max_trials": self.max_trials
+                }
+            },
+            "canvas": {
+                "edges": [],
+                "layout_version": "2.0"
+            }
+        }
+
+
+class InterviewEngine:
+    """
+    Manages the interview flow for study creation.
+
+    Usage:
+    1. Create engine: engine = InterviewEngine()
+    2. Start interview: engine.start()
+    3. Record answers: engine.record_answer("study_name", "bracket_opt")
+    4. Check progress: engine.get_progress()
+    5. Generate spec: engine.finalize()
+    """
+
+    def __init__(self):
+        self.state = InterviewState.NOT_STARTED
+        self.data = InterviewData()
+        self.questions_asked: List[str] = []
+        self.errors: List[str] = []
+
+    def start(self) -> Dict[str, Any]:
+        """Start the interview process"""
+        self.state = InterviewState.GATHERING_BASICS
+        return {
+            "state": self.state.value,
+            "message": "Let's create a new optimization study! I'll guide you through the process.",
+            "next_questions": self.get_current_questions()
+        }
+
+    def get_current_questions(self) -> List[Dict[str, Any]]:
+        """Get the questions for the current interview state"""
+        questions = {
+            InterviewState.GATHERING_BASICS: [
+                {
+                    "field": "study_name",
+                    "question": "What would you like to name this study?",
+                    "hint": "Use snake_case, e.g., 'bracket_mass_optimization'",
+                    "required": True
+                },
+                {
+                    "field": "category",
+                    "question": "What category should this study be in?",
+                    "hint": "e.g., 'Simple_Bracket', 'M1_Mirror', or leave blank for root",
+                    "required": False
+                },
+                {
+                    "field": "description",
+                    "question": "Briefly describe what you're trying to optimize",
+                    "hint": "e.g., 'Minimize bracket mass while maintaining stiffness'",
+                    "required": True
+                }
+            ],
+            InterviewState.GATHERING_MODEL: [
+                {
+                    "field": "sim_file",
+                    "question": "What is the path to your simulation (.sim) file?",
+                    "hint": "Relative path from the study folder, e.g., '1_setup/Model_sim1.sim'",
+                    "required": True
+                }
+            ],
+            InterviewState.GATHERING_VARIABLES: [
+                {
+                    "field": "design_variable",
+                    "question": "What parameters do you want to optimize?",
+                    "hint": "Tell me the NX expression names and their bounds",
+                    "required": True,
+                    "multi": True
+                }
+            ],
+            InterviewState.GATHERING_EXTRACTORS: [
+                {
+                    "field": "extractor",
+                    "question": "What physics quantities do you want to extract from FEA?",
+                    "hint": "e.g., mass, max displacement, max stress, frequency, Zernike WFE",
+                    "required": True,
+                    "multi": True
+                }
+            ],
+            InterviewState.GATHERING_OBJECTIVES: [
+                {
+                    "field": "objective",
+                    "question": "What do you want to optimize?",
+                    "hint": "Tell me which extracted quantities to minimize or maximize",
+                    "required": True,
+                    "multi": True
+                }
+            ],
+            InterviewState.GATHERING_CONSTRAINTS: [
+                {
+                    "field": "constraint",
+                    "question": "Do you have any constraints? (e.g., max stress, min frequency)",
+                    "hint": "You can say 'none' if you don't have any",
+                    "required": False,
+                    "multi": True
+                }
+            ],
+            InterviewState.GATHERING_SETTINGS: [
+                {
+                    "field": "algorithm",
+                    "question": "Which optimization algorithm would you like to use?",
+                    "hint": "Options: TPE (default), CMA-ES, NSGA-II, RandomSearch",
+                    "required": False
+                },
+                {
+                    "field": "max_trials",
+                    "question": "How many trials (FEA evaluations) should we run?",
+                    "hint": "Default is 100. More trials = better results but longer runtime",
+                    "required": False
+                }
+            ],
+            InterviewState.REVIEW: [
+                {
+                    "field": "confirm",
+                    "question": "Does this configuration look correct? (yes/no)",
+                    "required": True
+                }
+            ]
+        }
+        return questions.get(self.state, [])
+
+    def record_answer(self, field: str, value: Any) -> Dict[str, Any]:
+        """Record an answer and potentially advance the state"""
+        self.questions_asked.append(field)
+
+        # Handle different field types
+        if field == "study_name":
+            self.data.study_name = value
+        elif field == "category":
+            self.data.category = value if value else None
+        elif field == "description":
+            self.data.description = value
+        elif field == "sim_file":
+            self.data.sim_file = value
+        elif field == "design_variable":
+            # Value should be a dict with name, min, max, etc.
+            if isinstance(value, dict):
+                self.data.design_variables.append(value)
+            elif isinstance(value, list):
+                self.data.design_variables.extend(value)
+        elif field == "extractor":
+            if isinstance(value, dict):
+                self.data.extractors.append(value)
+            elif isinstance(value, list):
+                self.data.extractors.extend(value)
+        elif field == "objective":
+            if isinstance(value, dict):
+                self.data.objectives.append(value)
+            elif isinstance(value, list):
+                self.data.objectives.extend(value)
+        elif field == "constraint":
+            if value and value.lower() not in ["none", "no", "skip"]:
+                if isinstance(value, dict):
+                    self.data.constraints.append(value)
+                elif isinstance(value, list):
+                    self.data.constraints.extend(value)
+        elif field == "algorithm":
+            if value in ["TPE", "CMA-ES", "NSGA-II", "RandomSearch"]:
+                self.data.algorithm = value
+        elif field == "max_trials":
+            try:
+                self.data.max_trials = int(value)
+            except (ValueError, TypeError):
+                pass
+        elif field == "confirm":
+            if value.lower() in ["yes", "y", "confirm", "ok"]:
+                self.state = InterviewState.COMPLETED
+
+        return {
+            "state": self.state.value,
+            "recorded": {field: value},
+            "data_so_far": self.get_summary()
+        }
+
+    def advance_state(self) -> Dict[str, Any]:
+        """Advance to the next interview state"""
+        state_order = [
+            InterviewState.NOT_STARTED,
+            InterviewState.GATHERING_BASICS,
+            InterviewState.GATHERING_MODEL,
+            InterviewState.GATHERING_VARIABLES,
+            InterviewState.GATHERING_EXTRACTORS,
+            InterviewState.GATHERING_OBJECTIVES,
+            InterviewState.GATHERING_CONSTRAINTS,
+            InterviewState.GATHERING_SETTINGS,
+            InterviewState.REVIEW,
+            InterviewState.COMPLETED
+        ]
+
+        current_idx = state_order.index(self.state)
+        if current_idx < len(state_order) - 1:
+            self.state = state_order[current_idx + 1]
+
+        return {
+            "state": self.state.value,
+            "next_questions": self.get_current_questions()
+        }
+
+    def get_summary(self) -> Dict[str, Any]:
+        """Get a summary of collected data"""
+        return {
+            "study_name": self.data.study_name,
+            "category": self.data.category,
+            "description": self.data.description,
+            "model": self.data.sim_file,
+            "design_variables": len(self.data.design_variables),
+            "extractors": len(self.data.extractors),
+            "objectives": len(self.data.objectives),
+            "constraints": len(self.data.constraints),
+            "algorithm": self.data.algorithm,
+            "max_trials": self.data.max_trials
+        }
+
+    def get_progress(self) -> Dict[str, Any]:
+        """Get interview progress information"""
+        state_progress = {
+            InterviewState.NOT_STARTED: 0,
+            InterviewState.GATHERING_BASICS: 15,
+            InterviewState.GATHERING_MODEL: 25,
+            InterviewState.GATHERING_VARIABLES: 40,
+            InterviewState.GATHERING_EXTRACTORS: 55,
+            InterviewState.GATHERING_OBJECTIVES: 70,
+            InterviewState.GATHERING_CONSTRAINTS: 80,
+            InterviewState.GATHERING_SETTINGS: 90,
+            InterviewState.REVIEW: 95,
+            InterviewState.COMPLETED: 100
+        }
+
+        return {
+            "state": self.state.value,
+            "progress_percent": state_progress.get(self.state, 0),
+            "summary": self.get_summary(),
+            "current_questions": self.get_current_questions()
+        }
+
+    def validate(self) -> Dict[str, Any]:
+        """Validate the collected data before finalizing"""
+        errors = []
+        warnings = []
+
+        # Required fields
+        if not self.data.study_name:
+            errors.append("Study name is required")
+
+        if not self.data.design_variables:
+            errors.append("At least one design variable is required")
+
+        if not self.data.extractors:
+            errors.append("At least one extractor is required")
+
+        if not self.data.objectives:
+            errors.append("At least one objective is required")
+
+        # Warnings
+        if not self.data.sim_file:
+            warnings.append("No simulation file specified - you'll need to add one manually")
+
+        if not self.data.constraints:
+            warnings.append("No constraints defined - optimization will be unconstrained")
+
+        return {
+            "valid": len(errors) == 0,
+            "errors": errors,
+            "warnings": warnings
+        }
+
+    def finalize(self) -> Dict[str, Any]:
+        """Generate the final atomizer_spec.json"""
+        validation = self.validate()
+
+        if not validation["valid"]:
+            return {
+                "success": False,
+                "errors": validation["errors"]
+            }
+
+        spec = self.data.to_spec()
+
+        return {
+            "success": True,
+            "spec": spec,
+            "warnings": validation.get("warnings", [])
+        }
+
+    def to_dict(self) -> Dict[str, Any]:
+        """Serialize engine state for persistence"""
+        return {
+            "state": self.state.value,
+            "data": {
+                "study_name": self.data.study_name,
+                "category": self.data.category,
+                "description": self.data.description,
+                "goals": self.data.goals,
+                "sim_file": self.data.sim_file,
+                "prt_file": self.data.prt_file,
+                "solver_type": self.data.solver_type,
+                "design_variables": self.data.design_variables,
+                "extractors": self.data.extractors,
+                "objectives": self.data.objectives,
+                "constraints": self.data.constraints,
+                "algorithm": self.data.algorithm,
+                "max_trials": self.data.max_trials
+            },
+            "questions_asked": self.questions_asked,
+            "errors": self.errors
+        }
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "InterviewEngine":
+        """Restore engine from serialized state"""
+        engine = cls()
+        engine.state = InterviewState(data.get("state", "not_started"))
+
+        d = data.get("data", {})
+        engine.data.study_name = d.get("study_name")
+        engine.data.category = d.get("category")
+        engine.data.description = d.get("description")
+        engine.data.goals = d.get("goals", [])
+        engine.data.sim_file = d.get("sim_file")
+        engine.data.prt_file = d.get("prt_file")
+        engine.data.solver_type = d.get("solver_type", "nastran")
+        engine.data.design_variables = d.get("design_variables", [])
+        engine.data.extractors = d.get("extractors", [])
+        engine.data.objectives = d.get("objectives", [])
+        engine.data.constraints = d.get("constraints", [])
+        engine.data.algorithm = d.get("algorithm", "TPE")
+        engine.data.max_trials = d.get("max_trials", 100)
+
+        engine.questions_asked = data.get("questions_asked", [])
+        engine.errors = data.get("errors", [])
+
+        return engine

atomizer-dashboard/backend/api/services/session_manager.py

@@ -1,11 +1,15 @@
 """
 Session Manager
 
-Manages persistent Claude Code sessions with MCP integration.
+Manages persistent Claude Code sessions with direct file editing.
 Fixed for Windows compatibility - uses subprocess.Popen with ThreadPoolExecutor.
+
+Strategy: Claude edits atomizer_spec.json directly using Edit/Write tools
+(no MCP dependency for reliability).
 """
 
 import asyncio
+import hashlib
 import json
 import os
 import subprocess
@@ -26,6 +30,10 @@ MCP_SERVER_PATH = ATOMIZER_ROOT / "mcp-server" / "atomizer-tools"
 # Thread pool for subprocess operations (Windows compatible)
 _executor = ThreadPoolExecutor(max_workers=4)
 
+import logging
+
+logger = logging.getLogger(__name__)
+
 
 @dataclass
 class ClaudeSession:
@@ -130,6 +138,7 @@ class SessionManager:
         Send a message to a session and stream the response.
 
         Uses synchronous subprocess.Popen via ThreadPoolExecutor for Windows compatibility.
+        Claude edits atomizer_spec.json directly using Edit/Write tools (no MCP).
 
         Args:
             session_id: The session ID
@@ -147,45 +156,48 @@ class SessionManager:
         # Store user message
         self.store.add_message(session_id, "user", message)
 
+        # Get spec path and hash BEFORE Claude runs (to detect changes)
+        spec_path = self._get_spec_path(session.study_id) if session.study_id else None
+        spec_hash_before = self._get_file_hash(spec_path) if spec_path else None
+
         # Build context with conversation history AND canvas state
         history = self.store.get_history(session_id, limit=10)
         full_prompt = self.context_builder.build(
             mode=session.mode,
             study_id=session.study_id,
             conversation_history=history[:-1],
-            canvas_state=canvas_state,  # Pass canvas state for context
+            canvas_state=canvas_state,
+            spec_path=str(spec_path) if spec_path else None,  # Tell Claude where the spec is
         )
         full_prompt += f"\n\nUser: {message}\n\nRespond helpfully and concisely:"
 
-        # Build CLI arguments
+        # Build CLI arguments - NO MCP for reliability
         cli_args = ["claude", "--print"]
 
-        # Ensure MCP config exists
-        mcp_config_path = ATOMIZER_ROOT / f".claude-mcp-{session_id}.json"
-        if not mcp_config_path.exists():
-            mcp_config = self._build_mcp_config(session.mode)
-            with open(mcp_config_path, "w") as f:
-                json.dump(mcp_config, f)
-        cli_args.extend(["--mcp-config", str(mcp_config_path)])
-
         if session.mode == "user":
-            cli_args.extend([
-                "--allowedTools",
-                "Read Write(**/STUDY_REPORT.md) Write(**/3_results/*.md) Bash(python:*) mcp__atomizer-tools__*"
-            ])
+            # User mode: limited tools
+            cli_args.extend(
+                [
+                    "--allowedTools",
+                    "Read Bash(python:*)",
+                ]
+            )
         else:
+            # Power mode: full access to edit files
             cli_args.append("--dangerously-skip-permissions")
 
         cli_args.append("-")  # Read from stdin
 
         full_response = ""
         tool_calls: List[Dict] = []
+        process: Optional[subprocess.Popen] = None
 
         try:
             loop = asyncio.get_event_loop()
 
             # Run subprocess in thread pool (Windows compatible)
             def run_claude():
+                nonlocal process
                 try:
                     process = subprocess.Popen(
                         cli_args,
@@ -194,8 +206,8 @@ class SessionManager:
                         stderr=subprocess.PIPE,
                         cwd=str(ATOMIZER_ROOT),
                         text=True,
-                        encoding='utf-8',
-                        errors='replace',
+                        encoding="utf-8",
+                        errors="replace",
                     )
                     stdout, stderr = process.communicate(input=full_prompt, timeout=300)
                     return {
@@ -204,10 +216,13 @@ class SessionManager:
                         "returncode": process.returncode,
                     }
                 except subprocess.TimeoutExpired:
-                    process.kill()
+                    if process:
+                        process.kill()
                     return {"error": "Response timeout (5 minutes)"}
                 except FileNotFoundError:
-                    return {"error": "Claude CLI not found in PATH. Install with: npm install -g @anthropic-ai/claude-code"}
+                    return {
+                        "error": "Claude CLI not found in PATH. Install with: npm install -g @anthropic-ai/claude-code"
+                    }
                 except Exception as e:
                     return {"error": str(e)}
 
@@ -219,12 +234,14 @@ class SessionManager:
                 full_response = result["stdout"] or ""
 
                 if full_response:
+                    # Always send the text response first
                     yield {"type": "text", "content": full_response}
 
                 if result["returncode"] != 0 and result["stderr"]:
-                    yield {"type": "error", "message": f"CLI error: {result['stderr']}"}
+                    logger.warning(f"[SEND_MSG] CLI stderr: {result['stderr']}")
 
         except Exception as e:
+            logger.error(f"[SEND_MSG] Exception: {e}")
             yield {"type": "error", "message": str(e)}
 
         # Store assistant response
@@ -236,8 +253,46 @@ class SessionManager:
                 tool_calls=tool_calls if tool_calls else None,
             )
 
+        # Check if spec was modified by comparing hashes
+        if spec_path and session.mode == "power" and session.study_id:
+            spec_hash_after = self._get_file_hash(spec_path)
+            if spec_hash_before != spec_hash_after:
+                logger.info(f"[SEND_MSG] Spec file was modified! Sending update.")
+                spec_update = await self._check_spec_updated(session.study_id)
+                if spec_update:
+                    yield {
+                        "type": "spec_updated",
+                        "spec": spec_update,
+                        "tool": "direct_edit",
+                        "reason": "Claude modified spec file directly",
+                    }
+
         yield {"type": "done", "tool_calls": tool_calls}
 
+    def _get_spec_path(self, study_id: str) -> Optional[Path]:
+        """Get the atomizer_spec.json path for a study."""
+        if not study_id:
+            return None
+
+        if study_id.startswith("draft_"):
+            spec_path = ATOMIZER_ROOT / "studies" / "_inbox" / study_id / "atomizer_spec.json"
+        else:
+            spec_path = ATOMIZER_ROOT / "studies" / study_id / "atomizer_spec.json"
+            if not spec_path.exists():
+                spec_path = ATOMIZER_ROOT / "studies" / study_id / "1_setup" / "atomizer_spec.json"
+
+        return spec_path if spec_path.exists() else None
+
+    def _get_file_hash(self, path: Optional[Path]) -> Optional[str]:
+        """Get MD5 hash of a file for change detection."""
+        if not path or not path.exists():
+            return None
+        try:
+            with open(path, "rb") as f:
+                return hashlib.md5(f.read()).hexdigest()
+        except Exception:
+            return None
+
     async def switch_mode(
         self,
         session_id: str,
@@ -292,6 +347,132 @@ class SessionManager:
             **({} if not db_record else {"db_record": db_record}),
         }
 
+    def _extract_canvas_modifications(self, response: str) -> List[Dict]:
+        """
+        Extract canvas modification objects from Claude's response.
+
+        MCP tools like canvas_add_node return JSON with a 'modification' field.
+        This method finds and extracts those modifications so the frontend can apply them.
+        """
+        import re
+        import logging
+
+        logger = logging.getLogger(__name__)
+
+        modifications = []
+
+        # Debug: log what we're searching
+        logger.info(f"[CANVAS_MOD] Searching response ({len(response)} chars) for modifications")
+
+        # Check if "modification" even exists in the response
+        if '"modification"' not in response:
+            logger.info("[CANVAS_MOD] No 'modification' key found in response")
+            return modifications
+
+        try:
+            # Method 1: Look for JSON in code fences
+            code_block_pattern = r"```(?:json)?\s*([\s\S]*?)```"
+            for match in re.finditer(code_block_pattern, response):
+                block_content = match.group(1).strip()
+                try:
+                    obj = json.loads(block_content)
+                    if isinstance(obj, dict) and "modification" in obj:
+                        logger.info(
+                            f"[CANVAS_MOD] Found modification in code fence: {obj['modification']}"
+                        )
+                        modifications.append(obj["modification"])
+                except json.JSONDecodeError:
+                    continue
+
+            # Method 2: Find JSON objects using proper brace matching
+            # This handles nested objects correctly
+            i = 0
+            while i < len(response):
+                if response[i] == "{":
+                    # Found a potential JSON start, find matching close
+                    brace_count = 1
+                    j = i + 1
+                    in_string = False
+                    escape_next = False
+
+                    while j < len(response) and brace_count > 0:
+                        char = response[j]
+
+                        if escape_next:
+                            escape_next = False
+                        elif char == "\\":
+                            escape_next = True
+                        elif char == '"' and not escape_next:
+                            in_string = not in_string
+                        elif not in_string:
+                            if char == "{":
+                                brace_count += 1
+                            elif char == "}":
+                                brace_count -= 1
+                        j += 1
+
+                    if brace_count == 0:
+                        potential_json = response[i:j]
+                        try:
+                            obj = json.loads(potential_json)
+                            if isinstance(obj, dict) and "modification" in obj:
+                                mod = obj["modification"]
+                                # Avoid duplicates
+                                if mod not in modifications:
+                                    logger.info(
+                                        f"[CANVAS_MOD] Found inline modification: action={mod.get('action')}, nodeType={mod.get('nodeType')}"
+                                    )
+                                    modifications.append(mod)
+                        except json.JSONDecodeError as e:
+                            # Not valid JSON, skip
+                            pass
+                    i = j
+                else:
+                    i += 1
+
+        except Exception as e:
+            logger.error(f"[CANVAS_MOD] Error extracting modifications: {e}")
+
+        logger.info(f"[CANVAS_MOD] Extracted {len(modifications)} modification(s)")
+        return modifications
+
+    async def _check_spec_updated(self, study_id: str) -> Optional[Dict]:
+        """
+        Check if the atomizer_spec.json was modified and return the updated spec.
+
+        For drafts in _inbox/, we check the spec file directly.
+        """
+        import logging
+
+        logger = logging.getLogger(__name__)
+
+        try:
+            # Determine spec path based on study_id
+            if study_id.startswith("draft_"):
+                spec_path = ATOMIZER_ROOT / "studies" / "_inbox" / study_id / "atomizer_spec.json"
+            else:
+                # Regular study path
+                spec_path = ATOMIZER_ROOT / "studies" / study_id / "atomizer_spec.json"
+                if not spec_path.exists():
+                    spec_path = (
+                        ATOMIZER_ROOT / "studies" / study_id / "1_setup" / "atomizer_spec.json"
+                    )
+
+            if not spec_path.exists():
+                logger.debug(f"[SPEC_CHECK] Spec not found at {spec_path}")
+                return None
+
+            # Read and return the spec
+            with open(spec_path, "r", encoding="utf-8") as f:
+                spec = json.load(f)
+
+            logger.info(f"[SPEC_CHECK] Loaded spec from {spec_path}")
+            return spec
+
+        except Exception as e:
+            logger.error(f"[SPEC_CHECK] Error checking spec: {e}")
+            return None
+
     def _build_mcp_config(self, mode: Literal["user", "power"]) -> dict:
         """Build MCP configuration for Claude"""
         return {

atomizer-dashboard/backend/api/services/spec_manager.py

@@ -0,0 +1,827 @@
+"""
+SpecManager Service
+
+Central service for managing AtomizerSpec v2.0.
+All spec modifications flow through this service.
+
+Features:
+- Load/save specs with validation
+- Atomic writes with conflict detection
+- Patch operations with JSONPath support
+- Node CRUD operations
+- Custom function support
+- WebSocket broadcast integration
+"""
+
+import hashlib
+import json
+import re
+import sys
+from datetime import datetime, timezone
+from pathlib import Path
+from typing import Any, Callable, Dict, List, Optional, Set, Tuple, Union
+
+# Add optimization_engine to path if needed
+ATOMIZER_ROOT = Path(__file__).parent.parent.parent.parent.parent
+if str(ATOMIZER_ROOT) not in sys.path:
+    sys.path.insert(0, str(ATOMIZER_ROOT))
+
+from optimization_engine.config.spec_models import (
+    AtomizerSpec,
+    DesignVariable,
+    Extractor,
+    Objective,
+    Constraint,
+    CanvasPosition,
+    CanvasEdge,
+    ExtractorType,
+    CustomFunction,
+    ExtractorOutput,
+    ValidationReport,
+)
+from optimization_engine.config.spec_validator import (
+    SpecValidator,
+    SpecValidationError,
+)
+
+
+class SpecManagerError(Exception):
+    """Base error for SpecManager operations."""
+
+    pass
+
+
+class SpecNotFoundError(SpecManagerError):
+    """Raised when spec file doesn't exist."""
+
+    pass
+
+
+class SpecConflictError(SpecManagerError):
+    """Raised when spec has been modified by another client."""
+
+    def __init__(self, message: str, current_hash: str):
+        super().__init__(message)
+        self.current_hash = current_hash
+
+
+class WebSocketSubscriber:
+    """Protocol for WebSocket subscribers."""
+
+    async def send_json(self, data: Dict[str, Any]) -> None:
+        """Send JSON data to subscriber."""
+        raise NotImplementedError
+
+
+class SpecManager:
+    """
+    Central service for managing AtomizerSpec.
+
+    All modifications go through this service to ensure:
+    - Validation on every change
+    - Atomic file writes
+    - Conflict detection via hashing
+    - WebSocket broadcast to all clients
+    """
+
+    SPEC_FILENAME = "atomizer_spec.json"
+
+    def __init__(self, study_path: Union[str, Path]):
+        """
+        Initialize SpecManager for a study.
+
+        Args:
+            study_path: Path to the study directory
+        """
+        self.study_path = Path(study_path)
+        self.spec_path = self.study_path / self.SPEC_FILENAME
+        self.validator = SpecValidator()
+        self._subscribers: List[WebSocketSubscriber] = []
+        self._last_hash: Optional[str] = None
+
+    # =========================================================================
+    # Core CRUD Operations
+    # =========================================================================
+
+    def load(self, validate: bool = True) -> AtomizerSpec:
+        """
+        Load and optionally validate the spec.
+
+        Args:
+            validate: Whether to validate the spec
+
+        Returns:
+            AtomizerSpec instance
+
+        Raises:
+            SpecNotFoundError: If spec file doesn't exist
+            SpecValidationError: If validation fails
+        """
+        if not self.spec_path.exists():
+            raise SpecNotFoundError(f"Spec not found: {self.spec_path}")
+
+        with open(self.spec_path, "r", encoding="utf-8") as f:
+            data = json.load(f)
+
+        if validate:
+            self.validator.validate(data, strict=True)
+
+        spec = AtomizerSpec.model_validate(data)
+        self._last_hash = self._compute_hash(data)
+        return spec
+
+    def load_raw(self) -> Dict[str, Any]:
+        """
+        Load spec as raw dict without parsing.
+
+        Returns:
+            Raw spec dict
+
+        Raises:
+            SpecNotFoundError: If spec file doesn't exist
+        """
+        if not self.spec_path.exists():
+            raise SpecNotFoundError(f"Spec not found: {self.spec_path}")
+
+        with open(self.spec_path, "r", encoding="utf-8") as f:
+            return json.load(f)
+
+    def save(
+        self,
+        spec: Union[AtomizerSpec, Dict[str, Any]],
+        modified_by: str = "api",
+        expected_hash: Optional[str] = None,
+        skip_validation: bool = False,
+    ) -> str:
+        """
+        Save spec with validation and broadcast.
+
+        Args:
+            spec: Spec to save (AtomizerSpec or dict)
+            modified_by: Who/what is making the change
+            expected_hash: If provided, verify current file hash matches
+            skip_validation: If True, skip strict validation (for draft specs)
+
+        Returns:
+            New spec hash
+
+        Raises:
+            SpecValidationError: If validation fails
+            SpecConflictError: If expected_hash doesn't match current
+        """
+        # Convert to dict if needed
+        if isinstance(spec, AtomizerSpec):
+            data = spec.model_dump(mode="json")
+        else:
+            data = spec
+
+        # Check for conflicts if expected_hash provided
+        if expected_hash and self.spec_path.exists():
+            current_hash = self.get_hash()
+            if current_hash != expected_hash:
+                raise SpecConflictError(
+                    "Spec was modified by another client", current_hash=current_hash
+                )
+
+        # Update metadata
+        now = datetime.now(timezone.utc).isoformat().replace("+00:00", "Z")
+        data["meta"]["modified"] = now
+        data["meta"]["modified_by"] = modified_by
+
+        # Validate (skip for draft specs or when explicitly requested)
+        status = data.get("meta", {}).get("status", "draft")
+        is_draft = status in ("draft", "introspected", "configured")
+
+        if not skip_validation and not is_draft:
+            self.validator.validate(data, strict=True)
+        elif not skip_validation:
+            # For draft specs, just validate non-strictly (collect warnings only)
+            self.validator.validate(data, strict=False)
+
+        # Compute new hash
+        new_hash = self._compute_hash(data)
+
+        # Atomic write (write to temp, then rename)
+        temp_path = self.spec_path.with_suffix(".tmp")
+        with open(temp_path, "w", encoding="utf-8") as f:
+            json.dump(data, f, indent=2, ensure_ascii=False)
+
+        temp_path.replace(self.spec_path)
+
+        # Update cached hash
+        self._last_hash = new_hash
+
+        # Broadcast to subscribers
+        self._broadcast(
+            {"type": "spec_updated", "hash": new_hash, "modified_by": modified_by, "timestamp": now}
+        )
+
+        return new_hash
+
+    def exists(self) -> bool:
+        """Check if spec file exists."""
+        return self.spec_path.exists()
+
+    def get_hash(self) -> str:
+        """Get current spec hash."""
+        if not self.spec_path.exists():
+            return ""
+        with open(self.spec_path, "r", encoding="utf-8") as f:
+            data = json.load(f)
+        return self._compute_hash(data)
+
+    def validate_and_report(self) -> ValidationReport:
+        """
+        Run full validation and return detailed report.
+
+        Returns:
+            ValidationReport with errors, warnings, summary
+        """
+        if not self.spec_path.exists():
+            raise SpecNotFoundError(f"Spec not found: {self.spec_path}")
+
+        data = self.load_raw()
+        return self.validator.validate(data, strict=False)
+
+    # =========================================================================
+    # Patch Operations
+    # =========================================================================
+
+    def patch(self, path: str, value: Any, modified_by: str = "api") -> AtomizerSpec:
+        """
+        Apply a JSONPath-style modification.
+
+        Args:
+            path: JSONPath like "design_variables[0].bounds.max"
+            value: New value to set
+            modified_by: Who/what is making the change
+
+        Returns:
+            Updated AtomizerSpec
+        """
+        data = self.load_raw()
+
+        # Validate the partial update
+        spec = AtomizerSpec.model_validate(data)
+        is_valid, errors = self.validator.validate_partial(path, value, spec)
+        if not is_valid:
+            raise SpecValidationError(f"Invalid update: {'; '.join(errors)}")
+
+        # Apply the patch
+        self._apply_patch(data, path, value)
+
+        # Save and return
+        self.save(data, modified_by)
+        return self.load(validate=False)
+
+    def _apply_patch(self, data: Dict, path: str, value: Any) -> None:
+        """
+        Apply a patch to the data dict.
+
+        Supports paths like:
+        - "meta.description"
+        - "design_variables[0].bounds.max"
+        - "objectives[1].weight"
+        """
+        parts = self._parse_path(path)
+        if not parts:
+            raise ValueError(f"Invalid path: {path}")
+
+        # Navigate to parent
+        current = data
+        for part in parts[:-1]:
+            if isinstance(current, list):
+                idx = int(part)
+                current = current[idx]
+            else:
+                current = current[part]
+
+        # Set final value
+        final_key = parts[-1]
+        if isinstance(current, list):
+            idx = int(final_key)
+            current[idx] = value
+        else:
+            current[final_key] = value
+
+    def _parse_path(self, path: str) -> List[str]:
+        """Parse JSONPath into parts."""
+        # Handle both dot notation and bracket notation
+        parts = []
+        for part in re.split(r"\.|\[|\]", path):
+            if part:
+                parts.append(part)
+        return parts
+
+    # =========================================================================
+    # Node Operations
+    # =========================================================================
+
+    def add_node(
+        self, node_type: str, node_data: Dict[str, Any], modified_by: str = "canvas"
+    ) -> str:
+        """
+        Add a new node (design var, extractor, objective, constraint).
+
+        Args:
+            node_type: One of 'designVar', 'extractor', 'objective', 'constraint'
+            node_data: Node data without ID
+            modified_by: Who/what is making the change
+
+        Returns:
+            Generated node ID
+        """
+        data = self.load_raw()
+
+        # Generate ID
+        node_id = self._generate_id(node_type, data)
+        node_data["id"] = node_id
+
+        # Add canvas position if not provided
+        if "canvas_position" not in node_data:
+            node_data["canvas_position"] = self._auto_position(node_type, data)
+
+        # Add to appropriate section
+        section = self._get_section_for_type(node_type)
+
+        if section not in data or data[section] is None:
+            data[section] = []
+
+        data[section].append(node_data)
+
+        self.save(data, modified_by)
+
+        # Broadcast node addition
+        self._broadcast(
+            {
+                "type": "node_added",
+                "node_type": node_type,
+                "node_id": node_id,
+                "modified_by": modified_by,
+            }
+        )
+
+        return node_id
+
+    def update_node(
+        self, node_id: str, updates: Dict[str, Any], modified_by: str = "canvas"
+    ) -> None:
+        """
+        Update an existing node.
+
+        Args:
+            node_id: ID of the node to update
+            updates: Dict of fields to update
+            modified_by: Who/what is making the change
+        """
+        data = self.load_raw()
+
+        # Find and update the node
+        found = False
+        for section in ["design_variables", "extractors", "objectives", "constraints"]:
+            if section not in data or data[section] is None:
+                continue
+            for node in data[section]:
+                if node.get("id") == node_id:
+                    node.update(updates)
+                    found = True
+                    break
+            if found:
+                break
+
+        if not found:
+            raise SpecManagerError(f"Node not found: {node_id}")
+
+        self.save(data, modified_by)
+
+    def remove_node(self, node_id: str, modified_by: str = "canvas") -> None:
+        """
+        Remove a node and all edges referencing it.
+
+        Args:
+            node_id: ID of the node to remove
+            modified_by: Who/what is making the change
+        """
+        data = self.load_raw()
+
+        # Find and remove node
+        removed = False
+        for section in ["design_variables", "extractors", "objectives", "constraints"]:
+            if section not in data or data[section] is None:
+                continue
+            original_len = len(data[section])
+            data[section] = [n for n in data[section] if n.get("id") != node_id]
+            if len(data[section]) < original_len:
+                removed = True
+                break
+
+        if not removed:
+            raise SpecManagerError(f"Node not found: {node_id}")
+
+        # Remove edges referencing this node
+        if "canvas" in data and data["canvas"] and "edges" in data["canvas"]:
+            data["canvas"]["edges"] = [
+                e
+                for e in data["canvas"]["edges"]
+                if e.get("source") != node_id and e.get("target") != node_id
+            ]
+
+        self.save(data, modified_by)
+
+        # Broadcast node removal
+        self._broadcast({"type": "node_removed", "node_id": node_id, "modified_by": modified_by})
+
+    def update_node_position(
+        self, node_id: str, position: Dict[str, float], modified_by: str = "canvas"
+    ) -> None:
+        """
+        Update a node's canvas position.
+
+        Args:
+            node_id: ID of the node
+            position: Dict with x, y coordinates
+            modified_by: Who/what is making the change
+        """
+        self.update_node(node_id, {"canvas_position": position}, modified_by)
+
+    def add_edge(self, source: str, target: str, modified_by: str = "canvas") -> None:
+        """
+        Add a canvas edge between nodes.
+
+        Args:
+            source: Source node ID
+            target: Target node ID
+            modified_by: Who/what is making the change
+        """
+        data = self.load_raw()
+
+        # Initialize canvas section if needed
+        if "canvas" not in data or data["canvas"] is None:
+            data["canvas"] = {}
+        if "edges" not in data["canvas"] or data["canvas"]["edges"] is None:
+            data["canvas"]["edges"] = []
+
+        # Check for duplicate
+        for edge in data["canvas"]["edges"]:
+            if edge.get("source") == source and edge.get("target") == target:
+                return  # Already exists
+
+        data["canvas"]["edges"].append({"source": source, "target": target})
+
+        self.save(data, modified_by)
+
+    def remove_edge(self, source: str, target: str, modified_by: str = "canvas") -> None:
+        """
+        Remove a canvas edge.
+
+        Args:
+            source: Source node ID
+            target: Target node ID
+            modified_by: Who/what is making the change
+        """
+        data = self.load_raw()
+
+        if "canvas" in data and data["canvas"] and "edges" in data["canvas"]:
+            data["canvas"]["edges"] = [
+                e
+                for e in data["canvas"]["edges"]
+                if not (e.get("source") == source and e.get("target") == target)
+            ]
+
+        self.save(data, modified_by)
+
+    # =========================================================================
+    # Custom Function Support
+    # =========================================================================
+
+    def add_custom_function(
+        self,
+        name: str,
+        code: str,
+        outputs: List[str],
+        description: Optional[str] = None,
+        modified_by: str = "claude",
+    ) -> str:
+        """
+        Add a custom extractor function.
+
+        Args:
+            name: Function name
+            code: Python source code
+            outputs: List of output names
+            description: Optional description
+            modified_by: Who/what is making the change
+
+        Returns:
+            Generated extractor ID
+
+        Raises:
+            SpecValidationError: If Python syntax is invalid
+        """
+        # Validate Python syntax
+        try:
+            compile(code, f"<custom:{name}>", "exec")
+        except SyntaxError as e:
+            raise SpecValidationError(f"Invalid Python syntax: {e.msg} at line {e.lineno}")
+
+        data = self.load_raw()
+
+        # Generate extractor ID
+        ext_id = self._generate_id("extractor", data)
+
+        # Create extractor
+        extractor = {
+            "id": ext_id,
+            "name": description or f"Custom: {name}",
+            "type": "custom_function",
+            "builtin": False,
+            "function": {"name": name, "module": "custom_extractors.dynamic", "source_code": code},
+            "outputs": [{"name": o, "metric": "custom"} for o in outputs],
+            "canvas_position": self._auto_position("extractor", data),
+        }
+
+        data["extractors"].append(extractor)
+        self.save(data, modified_by)
+
+        return ext_id
+
+    def update_custom_function(
+        self,
+        extractor_id: str,
+        code: Optional[str] = None,
+        outputs: Optional[List[str]] = None,
+        modified_by: str = "claude",
+    ) -> None:
+        """
+        Update an existing custom function.
+
+        Args:
+            extractor_id: ID of the custom extractor
+            code: New Python code (optional)
+            outputs: New outputs (optional)
+            modified_by: Who/what is making the change
+        """
+        data = self.load_raw()
+
+        # Find the extractor
+        extractor = None
+        for ext in data.get("extractors", []):
+            if ext.get("id") == extractor_id:
+                extractor = ext
+                break
+
+        if not extractor:
+            raise SpecManagerError(f"Extractor not found: {extractor_id}")
+
+        if extractor.get("type") != "custom_function":
+            raise SpecManagerError(f"Extractor {extractor_id} is not a custom function")
+
+        # Update code
+        if code is not None:
+            try:
+                compile(code, f"<custom:{extractor_id}>", "exec")
+            except SyntaxError as e:
+                raise SpecValidationError(f"Invalid Python syntax: {e.msg} at line {e.lineno}")
+            if "function" not in extractor:
+                extractor["function"] = {}
+            extractor["function"]["source_code"] = code
+
+        # Update outputs
+        if outputs is not None:
+            extractor["outputs"] = [{"name": o, "metric": "custom"} for o in outputs]
+
+        self.save(data, modified_by)
+
+    # =========================================================================
+    # WebSocket Subscription
+    # =========================================================================
+
+    def subscribe(self, subscriber: WebSocketSubscriber) -> None:
+        """Subscribe to spec changes."""
+        if subscriber not in self._subscribers:
+            self._subscribers.append(subscriber)
+
+    def unsubscribe(self, subscriber: WebSocketSubscriber) -> None:
+        """Unsubscribe from spec changes."""
+        if subscriber in self._subscribers:
+            self._subscribers.remove(subscriber)
+
+    def _broadcast(self, message: Dict[str, Any]) -> None:
+        """Broadcast message to all subscribers."""
+        import asyncio
+
+        for subscriber in self._subscribers:
+            try:
+                # Handle both sync and async contexts
+                try:
+                    loop = asyncio.get_running_loop()
+                    loop.create_task(subscriber.send_json(message))
+                except RuntimeError:
+                    # No running loop, try direct call if possible
+                    pass
+            except Exception:
+                # Subscriber may have disconnected
+                pass
+
+    # =========================================================================
+    # Helper Methods
+    # =========================================================================
+
+    def _compute_hash(self, data: Dict) -> str:
+        """Compute hash of spec data for conflict detection."""
+        # Sort keys for consistent hashing
+        json_str = json.dumps(data, sort_keys=True, ensure_ascii=False)
+        return hashlib.sha256(json_str.encode()).hexdigest()[:16]
+
+    def _generate_id(self, node_type: str, data: Dict) -> str:
+        """Generate unique ID for a node type."""
+        prefix_map = {
+            "designVar": "dv",
+            "design_variable": "dv",
+            "extractor": "ext",
+            "objective": "obj",
+            "constraint": "con",
+        }
+        prefix = prefix_map.get(node_type, node_type[:3])
+
+        # Find existing IDs
+        section = self._get_section_for_type(node_type)
+        existing_ids: Set[str] = set()
+        if section in data and data[section]:
+            existing_ids = {n.get("id", "") for n in data[section]}
+
+        # Generate next available ID
+        for i in range(1, 1000):
+            new_id = f"{prefix}_{i:03d}"
+            if new_id not in existing_ids:
+                return new_id
+
+        raise SpecManagerError(f"Cannot generate ID for {node_type}: too many nodes")
+
+    def _get_section_for_type(self, node_type: str) -> str:
+        """Map node type to spec section name."""
+        section_map = {
+            "designVar": "design_variables",
+            "design_variable": "design_variables",
+            "extractor": "extractors",
+            "objective": "objectives",
+            "constraint": "constraints",
+        }
+        return section_map.get(node_type, node_type + "s")
+
+    def _auto_position(self, node_type: str, data: Dict) -> Dict[str, float]:
+        """Calculate auto position for a new node."""
+        # Default x positions by type
+        x_positions = {
+            "designVar": 50,
+            "design_variable": 50,
+            "extractor": 740,
+            "objective": 1020,
+            "constraint": 1020,
+        }
+
+        x = x_positions.get(node_type, 400)
+
+        # Find max y position for this type
+        section = self._get_section_for_type(node_type)
+        max_y = 0
+        if section in data and data[section]:
+            for node in data[section]:
+                pos = node.get("canvas_position", {})
+                y = pos.get("y", 0)
+                if y > max_y:
+                    max_y = y
+
+        # Place below existing nodes
+        y = max_y + 100 if max_y > 0 else 100
+
+        return {"x": x, "y": y}
+
+    # =========================================================================
+    # Intake Workflow Methods
+    # =========================================================================
+
+    def update_status(self, status: str, modified_by: str = "api") -> None:
+        """
+        Update the spec status field.
+
+        Args:
+            status: New status (draft, introspected, configured, validated, ready, running, completed, failed)
+            modified_by: Who/what is making the change
+        """
+        data = self.load_raw()
+        data["meta"]["status"] = status
+        self.save(data, modified_by)
+
+    def get_status(self) -> str:
+        """
+        Get the current spec status.
+
+        Returns:
+            Current status string
+        """
+        if not self.exists():
+            return "unknown"
+        data = self.load_raw()
+        return data.get("meta", {}).get("status", "draft")
+
+    def add_introspection(
+        self, introspection_data: Dict[str, Any], modified_by: str = "introspection"
+    ) -> None:
+        """
+        Add introspection data to the spec's model section.
+
+        Args:
+            introspection_data: Dict with timestamp, expressions, mass_kg, etc.
+            modified_by: Who/what is making the change
+        """
+        data = self.load_raw()
+
+        if "model" not in data:
+            data["model"] = {}
+
+        data["model"]["introspection"] = introspection_data
+        data["meta"]["status"] = "introspected"
+
+        self.save(data, modified_by)
+
+    def add_baseline(
+        self, baseline_data: Dict[str, Any], modified_by: str = "baseline_solve"
+    ) -> None:
+        """
+        Add baseline solve results to introspection data.
+
+        Args:
+            baseline_data: Dict with timestamp, solve_time_seconds, mass_kg, etc.
+            modified_by: Who/what is making the change
+        """
+        data = self.load_raw()
+
+        if "model" not in data:
+            data["model"] = {}
+        if "introspection" not in data["model"] or data["model"]["introspection"] is None:
+            data["model"]["introspection"] = {}
+
+        data["model"]["introspection"]["baseline"] = baseline_data
+
+        # Update status based on baseline success
+        if baseline_data.get("success", False):
+            data["meta"]["status"] = "validated"
+
+        self.save(data, modified_by)
+
+    def set_topic(self, topic: str, modified_by: str = "api") -> None:
+        """
+        Set the spec's topic field.
+
+        Args:
+            topic: Topic folder name
+            modified_by: Who/what is making the change
+        """
+        data = self.load_raw()
+        data["meta"]["topic"] = topic
+        self.save(data, modified_by)
+
+    def get_introspection(self) -> Optional[Dict[str, Any]]:
+        """
+        Get introspection data from spec.
+
+        Returns:
+            Introspection dict or None if not present
+        """
+        if not self.exists():
+            return None
+        data = self.load_raw()
+        return data.get("model", {}).get("introspection")
+
+    def get_design_candidates(self) -> List[Dict[str, Any]]:
+        """
+        Get expressions marked as design variable candidates.
+
+        Returns:
+            List of expression dicts where is_candidate=True
+        """
+        introspection = self.get_introspection()
+        if not introspection:
+            return []
+
+        expressions = introspection.get("expressions", [])
+        return [e for e in expressions if e.get("is_candidate", False)]
+
+
+# =========================================================================
+# Factory Function
+# =========================================================================
+
+
+def get_spec_manager(study_path: Union[str, Path]) -> SpecManager:
+    """
+    Get a SpecManager instance for a study.
+
+    Args:
+        study_path: Path to the study directory
+
+    Returns:
+        SpecManager instance
+    """
+    return SpecManager(study_path)

atomizer-dashboard/frontend/src/App.tsx

@@ -9,6 +9,7 @@ import Analysis from './pages/Analysis';
 import Insights from './pages/Insights';
 import Results from './pages/Results';
 import CanvasView from './pages/CanvasView';
+import Studio from './pages/Studio';
 
 const queryClient = new QueryClient({
   defaultOptions: {
@@ -30,6 +31,11 @@ function App() {
 
             {/* Canvas page - full screen, no sidebar */}
             <Route path="canvas" element={<CanvasView />} />
+            <Route path="canvas/*" element={<CanvasView />} />
+
+            {/* Studio - unified study creation environment */}
+            <Route path="studio" element={<Studio />} />
+            <Route path="studio/:draftId" element={<Studio />} />
 
             {/* Study pages - with sidebar layout */}
             <Route element={<MainLayout />}>

atomizer-dashboard/frontend/src/api/intake.ts

@@ -0,0 +1,411 @@
+/**
+ * Intake API Client
+ *
+ * API client methods for the study intake workflow.
+ */
+
+import {
+  CreateInboxRequest,
+  CreateInboxResponse,
+  IntrospectRequest,
+  IntrospectResponse,
+  ListInboxResponse,
+  ListTopicsResponse,
+  InboxStudyDetail,
+  GenerateReadmeResponse,
+  FinalizeRequest,
+  FinalizeResponse,
+  UploadFilesResponse,
+} from '../types/intake';
+
+const API_BASE = '/api';
+
+/**
+ * Intake API client for study creation workflow.
+ */
+export const intakeApi = {
+  /**
+   * Create a new inbox study folder with initial spec.
+   */
+  async createInbox(request: CreateInboxRequest): Promise<CreateInboxResponse> {
+    const response = await fetch(`${API_BASE}/intake/create`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(request),
+    });
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Failed to create inbox study');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Run NX introspection on an inbox study.
+   */
+  async introspect(request: IntrospectRequest): Promise<IntrospectResponse> {
+    const response = await fetch(`${API_BASE}/intake/introspect`, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(request),
+    });
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Introspection failed');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * List all studies in the inbox.
+   */
+  async listInbox(): Promise<ListInboxResponse> {
+    const response = await fetch(`${API_BASE}/intake/list`);
+
+    if (!response.ok) {
+      throw new Error('Failed to fetch inbox studies');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * List existing topic folders.
+   */
+  async listTopics(): Promise<ListTopicsResponse> {
+    const response = await fetch(`${API_BASE}/intake/topics`);
+
+    if (!response.ok) {
+      throw new Error('Failed to fetch topics');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Get detailed information about an inbox study.
+   */
+  async getInboxStudy(studyName: string): Promise<InboxStudyDetail> {
+    const response = await fetch(`${API_BASE}/intake/${encodeURIComponent(studyName)}`);
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Failed to fetch inbox study');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Delete an inbox study.
+   */
+  async deleteInboxStudy(studyName: string): Promise<{ success: boolean; deleted: string }> {
+    const response = await fetch(`${API_BASE}/intake/${encodeURIComponent(studyName)}`, {
+      method: 'DELETE',
+    });
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Failed to delete inbox study');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Generate README for an inbox study using Claude AI.
+   */
+  async generateReadme(studyName: string): Promise<GenerateReadmeResponse> {
+    const response = await fetch(
+      `${API_BASE}/intake/${encodeURIComponent(studyName)}/readme`,
+      { method: 'POST' }
+    );
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'README generation failed');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Finalize an inbox study and move to studies directory.
+   */
+  async finalize(studyName: string, request: FinalizeRequest): Promise<FinalizeResponse> {
+    const response = await fetch(
+      `${API_BASE}/intake/${encodeURIComponent(studyName)}/finalize`,
+      {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(request),
+      }
+    );
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Finalization failed');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Upload model files to an inbox study.
+   */
+  async uploadFiles(studyName: string, files: File[]): Promise<UploadFilesResponse> {
+    const formData = new FormData();
+    files.forEach((file) => {
+      formData.append('files', file);
+    });
+
+    const response = await fetch(
+      `${API_BASE}/intake/${encodeURIComponent(studyName)}/upload`,
+      {
+        method: 'POST',
+        body: formData,
+      }
+    );
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'File upload failed');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Upload context files to an inbox study.
+   * Context files help Claude understand optimization goals.
+   */
+  async uploadContextFiles(studyName: string, files: File[]): Promise<UploadFilesResponse> {
+    const formData = new FormData();
+    files.forEach((file) => {
+      formData.append('files', file);
+    });
+
+    const response = await fetch(
+      `${API_BASE}/intake/${encodeURIComponent(studyName)}/context`,
+      {
+        method: 'POST',
+        body: formData,
+      }
+    );
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Context file upload failed');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * List context files for an inbox study.
+   */
+  async listContextFiles(studyName: string): Promise<{
+    study_name: string;
+    context_files: Array<{ name: string; path: string; size: number; extension: string }>;
+    total: number;
+  }> {
+    const response = await fetch(
+      `${API_BASE}/intake/${encodeURIComponent(studyName)}/context`
+    );
+
+    if (!response.ok) {
+      throw new Error('Failed to list context files');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Delete a context file from an inbox study.
+   */
+  async deleteContextFile(studyName: string, filename: string): Promise<{ success: boolean; deleted: string }> {
+    const response = await fetch(
+      `${API_BASE}/intake/${encodeURIComponent(studyName)}/context/${encodeURIComponent(filename)}`,
+      { method: 'DELETE' }
+    );
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Failed to delete context file');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Create design variables from selected expressions.
+   */
+  async createDesignVariables(
+    studyName: string, 
+    expressionNames: string[],
+    options?: { autoBounds?: boolean; boundFactor?: number }
+  ): Promise<{
+    success: boolean;
+    study_name: string;
+    created: Array<{
+      id: string;
+      name: string;
+      expression_name: string;
+      bounds_min: number;
+      bounds_max: number;
+      baseline: number;
+      units: string | null;
+    }>;
+    total_created: number;
+  }> {
+    const response = await fetch(
+      `${API_BASE}/intake/${encodeURIComponent(studyName)}/design-variables`,
+      {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          expression_names: expressionNames,
+          auto_bounds: options?.autoBounds ?? true,
+          bound_factor: options?.boundFactor ?? 0.5,
+        }),
+      }
+    );
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Failed to create design variables');
+    }
+
+    return response.json();
+  },
+
+  // ===========================================================================
+  // Studio Endpoints (Atomizer Studio - Unified Creation Environment)
+  // ===========================================================================
+
+  /**
+   * Create an anonymous draft study for Studio workflow.
+   * Returns a temporary draft_id that can be renamed during finalization.
+   */
+  async createDraft(): Promise<{
+    success: boolean;
+    draft_id: string;
+    inbox_path: string;
+    spec_path: string;
+    status: string;
+  }> {
+    const response = await fetch(`${API_BASE}/intake/draft`, {
+      method: 'POST',
+    });
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Failed to create draft');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Get extracted text content from context files.
+   * Used for AI context injection.
+   */
+  async getContextContent(studyName: string): Promise<{
+    success: boolean;
+    study_name: string;
+    content: string;
+    files_read: Array<{
+      name: string;
+      extension: string;
+      size: number;
+      status: string;
+      characters?: number;
+      error?: string;
+    }>;
+    total_characters: number;
+  }> {
+    const response = await fetch(
+      `${API_BASE}/intake/${encodeURIComponent(studyName)}/context/content`
+    );
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Failed to get context content');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Finalize a Studio draft with rename support.
+   * Enhanced version that supports renaming draft_xxx to proper names.
+   */
+  async finalizeStudio(
+    studyName: string,
+    request: {
+      topic: string;
+      newName?: string;
+      runBaseline?: boolean;
+    }
+  ): Promise<{
+    success: boolean;
+    original_name: string;
+    final_name: string;
+    final_path: string;
+    status: string;
+    baseline_success: boolean | null;
+    readme_generated: boolean;
+  }> {
+    const response = await fetch(
+      `${API_BASE}/intake/${encodeURIComponent(studyName)}/finalize/studio`,
+      {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          topic: request.topic,
+          new_name: request.newName,
+          run_baseline: request.runBaseline ?? false,
+        }),
+      }
+    );
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Studio finalization failed');
+    }
+
+    return response.json();
+  },
+
+  /**
+   * Get complete draft information for Studio UI.
+   * Convenience endpoint that returns everything the Studio needs.
+   */
+  async getStudioDraft(studyName: string): Promise<{
+    success: boolean;
+    draft_id: string;
+    spec: Record<string, unknown>;
+    model_files: string[];
+    context_files: string[];
+    introspection_available: boolean;
+    design_variable_count: number;
+    objective_count: number;
+  }> {
+    const response = await fetch(
+      `${API_BASE}/intake/${encodeURIComponent(studyName)}/studio`
+    );
+
+    if (!response.ok) {
+      const error = await response.json();
+      throw new Error(error.detail || 'Failed to get studio draft');
+    }
+
+    return response.json();
+  },
+};
+
+export default intakeApi;

atomizer-dashboard/frontend/src/components/ParallelCoordinatesPlot.tsx

@@ -26,8 +26,8 @@ interface DesignVariable {
   name: string;
   parameter?: string;  // Optional: the actual parameter name if different from name
   unit?: string;
-  min: number;
-  max: number;
+  min?: number;
+  max?: number;
 }
 
 interface Constraint {

atomizer-dashboard/frontend/src/components/ParetoPlot.tsx

@@ -8,14 +8,15 @@ import { ScatterChart, Scatter, Line, XAxis, YAxis, CartesianGrid, Tooltip, Cell
 
 interface ParetoTrial {
   trial_number: number;
-  values: [number, number];
+  values: number[];  // Support variable number of objectives
   params: Record<string, number>;
   constraint_satisfied?: boolean;
 }
 
 interface Objective {
   name: string;
-  type: 'minimize' | 'maximize';
+  type?: 'minimize' | 'maximize';
+  direction?: 'minimize' | 'maximize';  // Alternative field used by some configs
   unit?: string;
 }
 

atomizer-dashboard/frontend/src/components/canvas/ConnectionStatusIndicator.tsx

@@ -0,0 +1,49 @@
+/**
+ * ConnectionStatusIndicator - Visual indicator for WebSocket connection status.
+ */
+
+import { ConnectionStatus } from '../../hooks/useSpecWebSocket';
+
+interface ConnectionStatusIndicatorProps {
+  status: ConnectionStatus;
+  className?: string;
+}
+
+/**
+ * Visual indicator for WebSocket connection status.
+ * Can be used in the canvas UI to show sync state.
+ */
+export function ConnectionStatusIndicator({
+  status,
+  className = '',
+}: ConnectionStatusIndicatorProps) {
+  const statusConfig = {
+    disconnected: {
+      color: 'bg-gray-500',
+      label: 'Disconnected',
+    },
+    connecting: {
+      color: 'bg-yellow-500 animate-pulse',
+      label: 'Connecting...',
+    },
+    connected: {
+      color: 'bg-green-500',
+      label: 'Connected',
+    },
+    reconnecting: {
+      color: 'bg-yellow-500 animate-pulse',
+      label: 'Reconnecting...',
+    },
+  };
+
+  const config = statusConfig[status];
+
+  return (
+    <div className={`flex items-center gap-2 ${className}`}>
+      <div className={`w-2 h-2 rounded-full ${config.color}`} />
+      <span className="text-xs text-dark-400">{config.label}</span>
+    </div>
+  );
+}
+
+export default ConnectionStatusIndicator;

atomizer-dashboard/frontend/src/components/canvas/ResizeHandle.tsx

@@ -0,0 +1,67 @@
+/**
+ * ResizeHandle - Visual drag handle for resizable panels
+ * 
+ * A thin vertical bar that can be dragged to resize panels.
+ * Shows visual feedback on hover and during drag.
+ */
+
+import { memo } from 'react';
+
+interface ResizeHandleProps {
+  /** Mouse down handler to start dragging */
+  onMouseDown: (e: React.MouseEvent) => void;
+  /** Double click handler to reset size */
+  onDoubleClick?: () => void;
+  /** Whether panel is currently being dragged */
+  isDragging?: boolean;
+  /** Position of the handle ('left' or 'right' edge of the panel) */
+  position?: 'left' | 'right';
+}
+
+function ResizeHandleComponent({
+  onMouseDown,
+  onDoubleClick,
+  isDragging = false,
+  position = 'right',
+}: ResizeHandleProps) {
+  return (
+    <div
+      className={`
+        absolute top-0 bottom-0 w-1 z-30
+        cursor-col-resize
+        transition-colors duration-150
+        ${position === 'right' ? 'right-0' : 'left-0'}
+        ${isDragging 
+          ? 'bg-primary-500' 
+          : 'bg-transparent hover:bg-primary-500/50'
+        }
+      `}
+      onMouseDown={onMouseDown}
+      onDoubleClick={onDoubleClick}
+      title="Drag to resize, double-click to reset"
+    >
+      {/* Wider hit area for easier grabbing */}
+      <div 
+        className={`
+          absolute top-0 bottom-0 w-3
+          ${position === 'right' ? '-left-1' : '-right-1'}
+        `}
+      />
+      
+      {/* Visual indicator dots (shown on hover via CSS) */}
+      <div className={`
+        absolute top-1/2 -translate-y-1/2
+        ${position === 'right' ? '-left-0.5' : '-right-0.5'}
+        flex flex-col gap-1 opacity-0 hover:opacity-100 transition-opacity
+        ${isDragging ? 'opacity-100' : ''}
+      `}>
+        <div className="w-1 h-1 rounded-full bg-dark-400" />
+        <div className="w-1 h-1 rounded-full bg-dark-400" />
+        <div className="w-1 h-1 rounded-full bg-dark-400" />
+      </div>
+    </div>
+  );
+}
+
+export const ResizeHandle = memo(ResizeHandleComponent);
+export default ResizeHandle;

atomizer-dashboard/frontend/src/components/canvas/SpecRenderer.tsx

@@ -10,7 +10,8 @@
  * P2.7-P2.10: SpecRenderer component with node/edge/selection handling
  */
 
-import { useCallback, useRef, useEffect, useMemo, DragEvent } from 'react';
+import { useCallback, useRef, useEffect, useMemo, useState, DragEvent } from 'react';
+import { Play, Square, Loader2, Eye, EyeOff, CheckCircle, AlertCircle } from 'lucide-react';
 import ReactFlow, {
   Background,
   Controls,
@@ -22,6 +23,7 @@ import ReactFlow, {
   NodeChange,
   EdgeChange,
   Connection,
+  applyNodeChanges,
 } from 'reactflow';
 import 'reactflow/dist/style.css';
 
@@ -36,23 +38,34 @@ import {
   useSelectedEdgeId,
 } from '../../hooks/useSpecStore';
 import { useSpecWebSocket } from '../../hooks/useSpecWebSocket';
+import { usePanelStore } from '../../hooks/usePanelStore';
+import { useOptimizationStream } from '../../hooks/useOptimizationStream';
 import { ConnectionStatusIndicator } from './ConnectionStatusIndicator';
+import { ProgressRing } from './visualization/ConvergenceSparkline';
 import { CanvasNodeData } from '../../lib/canvas/schema';
+import { validateSpec, canRunOptimization } from '../../lib/validation/specValidator';
 
 // ============================================================================
 // Drag-Drop Helpers
 // ============================================================================
 
-/** Addable node types via drag-drop */
-const ADDABLE_NODE_TYPES = ['designVar', 'extractor', 'objective', 'constraint'] as const;
+import { SINGLETON_TYPES } from './palette/NodePalette';
+
+/** All node types that can be added via drag-drop */
+const ADDABLE_NODE_TYPES = ['model', 'solver', 'designVar', 'extractor', 'objective', 'constraint', 'algorithm', 'surrogate'] as const;
 type AddableNodeType = typeof ADDABLE_NODE_TYPES[number];
 
 function isAddableNodeType(type: string): type is AddableNodeType {
   return ADDABLE_NODE_TYPES.includes(type as AddableNodeType);
 }
 
+/** Check if a node type is a singleton (only one allowed) */
+function isSingletonType(type: string): boolean {
+  return SINGLETON_TYPES.includes(type as typeof SINGLETON_TYPES[number]);
+}
+
 /** Maps canvas NodeType to spec API type */
-function mapNodeTypeToSpecType(type: AddableNodeType): 'designVar' | 'extractor' | 'objective' | 'constraint' {
+function mapNodeTypeToSpecType(type: AddableNodeType): 'designVar' | 'extractor' | 'objective' | 'constraint' | 'model' | 'solver' | 'algorithm' | 'surrogate' {
   return type;
 }
 
@@ -61,6 +74,22 @@ function getDefaultNodeData(type: AddableNodeType, position: { x: number; y: num
   const timestamp = Date.now();
   
   switch (type) {
+    case 'model':
+      return {
+        name: 'Model',
+        sim: {
+          path: '',
+          solver: 'nastran',
+        },
+        canvas_position: position,
+      };
+    case 'solver':
+      return {
+        name: 'Solver',
+        engine: 'nxnastran',
+        solution_type: 'SOL101',
+        canvas_position: position,
+      };
     case 'designVar':
       return {
         name: `variable_${timestamp}`,
@@ -74,8 +103,28 @@ function getDefaultNodeData(type: AddableNodeType, position: { x: number; y: num
     case 'extractor':
       return {
         name: `extractor_${timestamp}`,
-        type: 'custom',
+        type: 'custom_function',  // Must be valid ExtractorType
+        builtin: false,
         enabled: true,
+        // Custom function extractors need a function definition
+        function: {
+          name: 'extract',
+          source_code: `def extract(op2_path: str, config: dict = None) -> dict:
+    """
+    Custom extractor function.
+    
+    Args:
+        op2_path: Path to the OP2 results file
+        config: Optional configuration dict
+    
+    Returns:
+        Dictionary with extracted values
+    """
+    # TODO: Implement extraction logic
+    return {'value': 0.0}
+`,
+        },
+        outputs: [{ name: 'value', metric: 'custom' }],
         canvas_position: position,
       };
     case 'objective':
@@ -83,20 +132,44 @@ function getDefaultNodeData(type: AddableNodeType, position: { x: number; y: num
         name: `objective_${timestamp}`,
         direction: 'minimize',
         weight: 1.0,
-        source_extractor_id: null,
-        source_output: null,
+        // Source is required - use placeholder that user must configure
+        source: {
+          extractor_id: 'ext_001',  // Placeholder - user needs to configure
+          output_name: 'value',
+        },
         canvas_position: position,
       };
     case 'constraint':
       return {
         name: `constraint_${timestamp}`,
-        type: 'upper',
-        limit: 1.0,
-        source_extractor_id: null,
-        source_output: null,
+        type: 'hard',  // Must be 'hard' or 'soft' (field is 'type' not 'constraint_type')
+        operator: '<=',
+        threshold: 1.0,  // Field is 'threshold' not 'limit'
+        // Source is required
+        source: {
+          extractor_id: 'ext_001',  // Placeholder - user needs to configure
+          output_name: 'value',
+        },
         enabled: true,
         canvas_position: position,
       };
+    case 'algorithm':
+      return {
+        name: 'Algorithm',
+        type: 'TPE',
+        budget: {
+          max_trials: 100,
+        },
+        canvas_position: position,
+      };
+    case 'surrogate':
+      return {
+        name: 'Surrogate',
+        enabled: false,
+        model_type: 'MLP',
+        min_trials: 20,
+        canvas_position: position,
+      };
   }
 }
 
@@ -162,6 +235,7 @@ function SpecRendererInner({
     clearSelection,
     updateNodePosition,
     addNode,
+    updateNode,
     addEdge,
     removeEdge,
     removeNode,
@@ -173,6 +247,170 @@ function SpecRendererInner({
   const wsStudyId = enableWebSocket ? storeStudyId : null;
   const { status: wsStatus } = useSpecWebSocket(wsStudyId);
 
+  // Panel store for validation and error panels
+  const { setValidationData, addError, openPanel } = usePanelStore();
+
+  // Optimization WebSocket stream for real-time updates
+  const {
+    status: optimizationStatus,
+    progress: wsProgress,
+    bestTrial: wsBestTrial,
+    recentTrials,
+  } = useOptimizationStream(studyId, {
+    autoReportErrors: true,
+    onTrialComplete: (trial) => {
+      console.log('[SpecRenderer] Trial completed:', trial.trial_number);
+    },
+    onNewBest: (best) => {
+      console.log('[SpecRenderer] New best found:', best.value);
+      setShowResults(true); // Auto-show results when new best found
+    },
+  });
+
+  // Optimization execution state
+  const isRunning = optimizationStatus === 'running';
+  const [isStarting, setIsStarting] = useState(false);
+  const [showResults, setShowResults] = useState(false);
+  const [validationStatus, setValidationStatus] = useState<'valid' | 'invalid' | 'unchecked'>('unchecked');
+
+  // When connecting Extractor → Objective/Constraint and the extractor has multiple outputs,
+  // we prompt the user to choose which output_name to use.
+  const [pendingOutputSelect, setPendingOutputSelect] = useState<null | {
+    sourceId: string;
+    targetId: string;
+    outputNames: string[];
+    selected: string;
+  }>(null);
+
+  // Build trial history for sparklines (extract objective values from recent trials)
+  const trialHistory = useMemo(() => {
+    const history: Record<string, number[]> = {};
+    for (const trial of recentTrials) {
+      // Map objective values - assumes single objective for now
+      if (trial.objective !== null) {
+        const key = 'primary';
+        if (!history[key]) history[key] = [];
+        history[key].push(trial.objective);
+      }
+      // Could also extract individual params/results for multi-objective
+    }
+    // Reverse so oldest is first (for sparkline)
+    for (const key of Object.keys(history)) {
+      history[key].reverse();
+    }
+    return history;
+  }, [recentTrials]);
+
+  // Build best trial data for node display
+  const bestTrial = useMemo((): {
+    trial_number: number;
+    objective: number;
+    design_variables: Record<string, number>;
+    results: Record<string, number>;
+  } | null => {
+    if (!wsBestTrial) return null;
+    return {
+      trial_number: wsBestTrial.trial_number,
+      objective: wsBestTrial.value,
+      design_variables: wsBestTrial.params,
+      results: { primary: wsBestTrial.value, ...wsBestTrial.params },
+    };
+  }, [wsBestTrial]);
+
+  // Note: Polling removed - now using WebSocket via useOptimizationStream hook
+  // The hook handles: status updates, best trial updates, error reporting
+
+  // Validate the spec and show results in panel
+  const handleValidate = useCallback(() => {
+    if (!spec) return;
+    
+    const result = validateSpec(spec);
+    setValidationData(result);
+    setValidationStatus(result.valid ? 'valid' : 'invalid');
+    
+    // Auto-open validation panel if there are issues
+    if (!result.valid || result.warnings.length > 0) {
+      openPanel('validation');
+    }
+    
+    return result;
+  }, [spec, setValidationData, openPanel]);
+
+  const handleRun = async () => {
+    if (!studyId || !spec) return;
+    
+    // Validate before running
+    const validation = handleValidate();
+    if (!validation || !validation.valid) {
+      // Show validation panel with errors
+      return;
+    }
+    
+    // Also do a quick sanity check
+    const { canRun, reason } = canRunOptimization(spec);
+    if (!canRun) {
+      addError({
+        type: 'config_error',
+        message: reason || 'Cannot run optimization',
+        recoverable: false,
+        suggestions: ['Check the validation panel for details'],
+        timestamp: Date.now(),
+      });
+      return;
+    }
+    
+    setIsStarting(true);
+    try {
+      const res = await fetch(`/api/optimization/studies/${studyId}/run`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ trials: spec?.optimization?.budget?.max_trials || 50 })
+      });
+      if (!res.ok) {
+        const err = await res.json();
+        throw new Error(err.detail || 'Failed to start');
+      }
+      // isRunning is now derived from WebSocket state (optimizationStatus === 'running')
+      setValidationStatus('unchecked'); // Clear validation status when running
+    } catch (e) {
+      const errorMessage = e instanceof Error ? e.message : 'Failed to start optimization';
+      setError(errorMessage);
+      
+      // Also add to error panel for persistence
+      addError({
+        type: 'system_error',
+        message: errorMessage,
+        recoverable: true,
+        suggestions: ['Check if the backend is running', 'Verify the study configuration'],
+        timestamp: Date.now(),
+      });
+    } finally {
+      setIsStarting(false);
+    }
+  };
+
+  const handleStop = async () => {
+    if (!studyId) return;
+    try {
+      const res = await fetch(`/api/optimization/studies/${studyId}/stop`, { method: 'POST' });
+      if (!res.ok) {
+        const err = await res.json().catch(() => ({}));
+        throw new Error(err.detail || 'Failed to stop');
+      }
+      // isRunning will update via WebSocket when optimization actually stops
+    } catch (e) {
+      const errorMessage = e instanceof Error ? e.message : 'Failed to stop optimization';
+      setError(errorMessage);
+      addError({
+        type: 'system_error',
+        message: errorMessage,
+        recoverable: false,
+        suggestions: ['The optimization may still be running in the background'],
+        timestamp: Date.now(),
+      });
+    }
+  };
+
   // Load spec on mount if studyId provided
   useEffect(() => {
     if (studyId) {
@@ -184,10 +422,143 @@ function SpecRendererInner({
     }
   }, [studyId, loadSpec, onStudyChange]);
 
+  // -------------------------------------------------------------------------
+  // Option A: Edge projection sync (source fields are truth)
+  // Keep canvas edges in sync when user edits objective/constraint source in panels.
+  // We only enforce Extractor -> Objective/Constraint wiring edges here.
+  // -------------------------------------------------------------------------
+
+  const isEdgeSyncingRef = useRef(false);
+
+  useEffect(() => {
+    if (!spec || !studyId) return;
+    if (isEdgeSyncingRef.current) return;
+
+    const current = spec.canvas?.edges || [];
+
+    // Compute desired extractor->objective/constraint edges from source fields
+    const desiredPairs = new Set<string>();
+
+    for (const obj of spec.objectives || []) {
+      const extractorId = obj.source?.extractor_id;
+      const outputName = obj.source?.output_name;
+      if (extractorId && outputName && extractorId !== '__UNSET__' && outputName !== '__UNSET__') {
+        desiredPairs.add(`${extractorId}__${obj.id}`);
+      }
+    }
+
+    for (const con of spec.constraints || []) {
+      const extractorId = con.source?.extractor_id;
+      const outputName = con.source?.output_name;
+      if (extractorId && outputName && extractorId !== '__UNSET__' && outputName !== '__UNSET__') {
+        desiredPairs.add(`${extractorId}__${con.id}`);
+      }
+    }
+
+    // Identify current wiring edges (ext_* -> obj_*/con_*)
+    const currentWiringPairs = new Set<string>();
+    for (const e of current) {
+      if (e.source?.startsWith('ext_') && (e.target?.startsWith('obj_') || e.target?.startsWith('con_'))) {
+        currentWiringPairs.add(`${e.source}__${e.target}`);
+      }
+    }
+
+    // Determine adds/removes
+    const toAdd: Array<{ source: string; target: string }> = [];
+    for (const key of desiredPairs) {
+      if (!currentWiringPairs.has(key)) {
+        const [source, target] = key.split('__');
+        toAdd.push({ source, target });
+      }
+    }
+
+    const toRemove: Array<{ source: string; target: string }> = [];
+    for (const key of currentWiringPairs) {
+      if (!desiredPairs.has(key)) {
+        const [source, target] = key.split('__');
+        toRemove.push({ source, target });
+      }
+    }
+
+    if (toAdd.length === 0 && toRemove.length === 0) return;
+
+    isEdgeSyncingRef.current = true;
+
+    (async () => {
+      try {
+        // Remove stale edges first
+        for (const e of toRemove) {
+          await removeEdge(e.source, e.target);
+        }
+        // Add missing edges
+        for (const e of toAdd) {
+          await addEdge(e.source, e.target);
+        }
+      } catch (err) {
+        console.error('[SpecRenderer] Edge projection sync failed:', err);
+      } finally {
+        // Small delay avoids re-entrancy storms when backend broadcasts updates
+        setTimeout(() => {
+          isEdgeSyncingRef.current = false;
+        }, 250);
+      }
+    })();
+  }, [spec, studyId, addEdge, removeEdge]);
+
   // Convert spec to ReactFlow nodes
   const nodes = useMemo(() => {
-    return specToNodes(spec);
-  }, [spec]);
+    const baseNodes = specToNodes(spec);
+    
+    // Always map nodes to include history for sparklines (even if not showing results)
+    return baseNodes.map(node => {
+      // Create a mutable copy with explicit any type for dynamic property assignment
+      // eslint-disable-next-line @typescript-eslint/no-explicit-any
+      const newData: any = { ...node.data };
+      
+      // Add history for sparklines on objective nodes
+      if (node.type === 'objective') {
+        newData.history = trialHistory['primary'] || [];
+      }
+      
+      // Map results to nodes when showing results
+      if (showResults && bestTrial) {
+        if (node.type === 'designVar' && newData.expressionName) {
+          const val = bestTrial.design_variables?.[newData.expressionName];
+          if (val !== undefined) newData.resultValue = val;
+        } else if (node.type === 'objective') {
+          const outputName = newData.outputName;
+          if (outputName && bestTrial.results?.[outputName] !== undefined) {
+            newData.resultValue = bestTrial.results[outputName];
+          }
+        } else if (node.type === 'constraint') {
+          const outputName = newData.outputName;
+          if (outputName && bestTrial.results?.[outputName] !== undefined) {
+            const val = bestTrial.results[outputName];
+            newData.resultValue = val;
+            
+            // Check feasibility
+            const op = newData.operator;
+            const threshold = newData.value;
+            if (op === '<=' && threshold !== undefined) newData.isFeasible = val <= threshold;
+            else if (op === '>=' && threshold !== undefined) newData.isFeasible = val >= threshold;
+            else if (op === '<' && threshold !== undefined) newData.isFeasible = val < threshold;
+            else if (op === '>' && threshold !== undefined) newData.isFeasible = val > threshold;
+            else if (op === '==' && threshold !== undefined) newData.isFeasible = Math.abs(val - threshold) < 1e-6;
+          }
+        } else if (node.type === 'extractor') {
+          const outputNames = newData.outputNames;
+          if (outputNames && outputNames.length > 0 && bestTrial.results) {
+            const firstOut = outputNames[0];
+            if (bestTrial.results[firstOut] !== undefined) {
+              newData.resultValue = bestTrial.results[firstOut];
+            }
+          }
+        }
+      }
+      
+      return { ...node, data: newData };
+    });
+  }, [spec, showResults, bestTrial, trialHistory]);
 
   // Convert spec to ReactFlow edges with selection styling
   const edges = useMemo(() => {
@@ -208,12 +579,23 @@ function SpecRendererInner({
     nodesRef.current = nodes;
   }, [nodes]);
 
+  // Track local node state for smooth dragging
+  const [localNodes, setLocalNodes] = useState(nodes);
+  
+  // Sync local nodes with spec-derived nodes when spec changes
+  useEffect(() => {
+    setLocalNodes(nodes);
+  }, [nodes]);
+
   // Handle node position changes
   const onNodesChange = useCallback(
     (changes: NodeChange[]) => {
       if (!editable) return;
 
-      // Handle position changes
+      // Apply changes to local state for smooth dragging
+      setLocalNodes((nds) => applyNodeChanges(changes, nds));
+
+      // Handle position changes - save to spec when drag ends
       for (const change of changes) {
         if (change.type === 'position' && change.position && change.dragging === false) {
           // Dragging ended - update spec
@@ -232,34 +614,111 @@ function SpecRendererInner({
     (changes: EdgeChange[]) => {
       if (!editable) return;
 
+      const classify = (id: string): string => {
+        if (id === 'model' || id === 'solver' || id === 'algorithm' || id === 'surrogate') return id;
+        const prefix = id.split('_')[0];
+        if (prefix === 'dv') return 'designVar';
+        if (prefix === 'ext') return 'extractor';
+        if (prefix === 'obj') return 'objective';
+        if (prefix === 'con') return 'constraint';
+        return 'unknown';
+      };
+
       for (const change of changes) {
         if (change.type === 'remove') {
           // Find the edge being removed
           const edge = edges.find((e) => e.id === change.id);
-          if (edge) {
-            removeEdge(edge.source, edge.target).catch((err) => {
-              console.error('Failed to remove edge:', err);
+          if (!edge) continue;
+
+          const sourceType = classify(edge.source);
+          const targetType = classify(edge.target);
+
+          // First remove the visual edge
+          removeEdge(edge.source, edge.target).catch((err) => {
+            console.error('Failed to remove edge:', err);
+            setError(err.message);
+          });
+
+          // Option A truth model: if we removed Extractor -> Objective/Constraint,
+          // clear the target's source to avoid stale runnable config.
+          if (sourceType === 'extractor' && (targetType === 'objective' || targetType === 'constraint')) {
+            updateNode(edge.target, {
+              // Objective/constraint.source is required by schema.
+              // Use explicit UNSET placeholders so validation can catch it
+              // without risking accidental execution.
+              source: { extractor_id: '__UNSET__', output_name: '__UNSET__' },
+            }).catch((err) => {
+              console.error('Failed to clear source on node:', err);
               setError(err.message);
             });
           }
         }
       }
     },
-    [editable, edges, removeEdge, setError]
+    [editable, edges, removeEdge, setError, updateNode]
   );
 
   // Handle new connections
   const onConnect = useCallback(
-    (connection: Connection) => {
+    async (connection: Connection) => {
       if (!editable) return;
       if (!connection.source || !connection.target) return;
 
-      addEdge(connection.source, connection.target).catch((err) => {
-        console.error('Failed to add edge:', err);
-        setError(err.message);
-      });
+      const sourceId = connection.source;
+      const targetId = connection.target;
+
+      // Helper: classify nodes by ID (synthetic vs spec-backed)
+      const classify = (id: string): string => {
+        if (id === 'model' || id === 'solver' || id === 'algorithm' || id === 'surrogate') return id;
+        const prefix = id.split('_')[0];
+        if (prefix === 'dv') return 'designVar';
+        if (prefix === 'ext') return 'extractor';
+        if (prefix === 'obj') return 'objective';
+        if (prefix === 'con') return 'constraint';
+        return 'unknown';
+      };
+
+      const sourceType = classify(sourceId);
+      const targetType = classify(targetId);
+
+      try {
+        // Option A truth model: objective/constraint source is the real linkage.
+        // When user connects Extractor -> Objective/Constraint, we must choose an output_name.
+        if (spec && sourceType === 'extractor' && (targetType === 'objective' || targetType === 'constraint')) {
+          const ext = spec.extractors.find((e) => e.id === sourceId);
+          const outputNames = (ext?.outputs || []).map((o) => o.name).filter(Boolean);
+
+          // If extractor has multiple outputs, prompt the user.
+          if (outputNames.length > 1) {
+            const preferred = outputNames.includes('value') ? 'value' : outputNames[0];
+            setPendingOutputSelect({
+              sourceId,
+              targetId,
+              outputNames,
+              selected: preferred,
+            });
+            return;
+          }
+
+          // Single (or zero) output: choose deterministically.
+          const outputName = outputNames[0] || 'value';
+
+          // Persist edge + runnable source.
+          await addEdge(sourceId, targetId);
+          await updateNode(targetId, {
+            source: { extractor_id: sourceId, output_name: outputName },
+          });
+          return;
+        }
+
+        // Default: just persist the visual edge.
+        await addEdge(sourceId, targetId);
+      } catch (err) {
+        console.error('Failed to add connection:', err);
+        setError(err instanceof Error ? err.message : 'Failed to add connection');
+      }
     },
-    [editable, addEdge, setError]
+    [editable, addEdge, setError, spec, updateNode, setPendingOutputSelect]
   );
 
   // Handle node clicks for selection
@@ -353,6 +812,18 @@ function SpecRendererInner({
         return;
       }
 
+      // Check if this is a singleton type that already exists
+      if (isSingletonType(type)) {
+        const existingNode = localNodes.find(n => n.type === type);
+        if (existingNode) {
+          // Select the existing node instead of creating a duplicate
+          selectNode(existingNode.id);
+          // Show a toast notification would be nice here
+          console.log(`${type} already exists - selected existing node`);
+          return;
+        }
+      }
+
       // Convert screen position to flow position
       const position = reactFlowInstance.current.screenToFlowPosition({
         x: event.clientX,
@@ -363,8 +834,19 @@ function SpecRendererInner({
       const nodeData = getDefaultNodeData(type, position);
       const specType = mapNodeTypeToSpecType(type);
 
+      // For structural types (model, solver, algorithm, surrogate), these are 
+      // part of the spec structure rather than array items. Handle differently.
+      const structuralTypes = ['model', 'solver', 'algorithm', 'surrogate'];
+      if (structuralTypes.includes(type)) {
+        // These nodes are derived from spec structure - they shouldn't be "added"
+        // They already exist if the spec has that section configured
+        console.log(`${type} is a structural node - configure via spec directly`);
+        setError(`${type} nodes are configured via the spec. Use the config panel to edit.`);
+        return;
+      }
+
       try {
-        const nodeId = await addNode(specType, nodeData);
+        const nodeId = await addNode(specType as 'designVar' | 'extractor' | 'objective' | 'constraint', nodeData);
         // Select the newly created node
         selectNode(nodeId);
       } catch (err) {
@@ -372,9 +854,37 @@ function SpecRendererInner({
         setError(err instanceof Error ? err.message : 'Failed to add node');
       }
     },
-    [editable, addNode, selectNode, setError]
+    [editable, addNode, selectNode, setError, localNodes]
   );
 
+  // -------------------------------------------------------------------------
+  // Output selection modal handlers (Extractor → Objective/Constraint)
+  // -------------------------------------------------------------------------
+
+  const confirmOutputSelection = useCallback(async () => {
+    if (!pendingOutputSelect) return;
+
+    const { sourceId, targetId, selected } = pendingOutputSelect;
+
+    try {
+      // Persist edge + runnable source wiring
+      await addEdge(sourceId, targetId);
+      await updateNode(targetId, {
+        source: { extractor_id: sourceId, output_name: selected },
+      });
+    } catch (err) {
+      console.error('Failed to apply output selection:', err);
+      setError(err instanceof Error ? err.message : 'Failed to apply output selection');
+    } finally {
+      setPendingOutputSelect(null);
+    }
+  }, [pendingOutputSelect, addEdge, updateNode, setError]);
+
+  const cancelOutputSelection = useCallback(() => {
+    // User canceled: do not create the edge, do not update source
+    setPendingOutputSelect(null);
+  }, []);
+
   // Loading state
   if (showLoadingOverlay && isLoading && !spec) {
     return (
@@ -457,14 +967,65 @@ function SpecRendererInner({
         </div>
       )}
 
+      {/* Output selection modal (Extractor → Objective/Constraint) */}
+      {pendingOutputSelect && (
+        <div className="absolute inset-0 z-30 flex items-center justify-center bg-black/60 backdrop-blur-sm">
+          <div className="w-[520px] max-w-[90vw] bg-dark-850 border border-dark-600 rounded-xl shadow-2xl p-5">
+            <h3 className="text-white font-semibold text-lg">Select extractor output</h3>
+            <p className="text-sm text-dark-300 mt-1">
+              This extractor provides multiple outputs. Choose which output the target should use.
+            </p>
+
+            <div className="mt-4">
+              <label className="block text-sm font-medium text-dark-300 mb-1">Output</label>
+              <select
+                value={pendingOutputSelect.selected}
+                onChange={(e) =>
+                  setPendingOutputSelect((prev) =>
+                    prev ? { ...prev, selected: e.target.value } : prev
+                  )
+                }
+                className="w-full px-3 py-2 bg-dark-800 border border-dark-600 text-white rounded-lg focus:border-primary-500 focus:outline-none transition-colors"
+              >
+                {pendingOutputSelect.outputNames.map((name) => (
+                  <option key={name} value={name}>
+                    {name}
+                  </option>
+                ))}
+              </select>
+              <p className="text-xs text-dark-500 mt-2">
+                Tip: we default to <span className="text-dark-300 font-medium">value</span> when available.
+              </p>
+            </div>
+
+            <div className="mt-5 flex justify-end gap-2">
+              <button
+                onClick={cancelOutputSelection}
+                className="px-4 py-2 bg-dark-700 text-dark-200 hover:bg-dark-600 rounded-lg border border-dark-600 transition-colors"
+              >
+                Cancel
+              </button>
+              <button
+                onClick={confirmOutputSelection}
+                className="px-4 py-2 bg-primary-600 text-white hover:bg-primary-500 rounded-lg border border-primary-500 transition-colors"
+              >
+                Connect
+              </button>
+            </div>
+          </div>
+        </div>
+      )}
+
       <ReactFlow
-        nodes={nodes}
+        nodes={localNodes}
         edges={edges}
         onNodesChange={onNodesChange}
         onEdgesChange={onEdgesChange}
         onConnect={onConnect}
         onInit={(instance) => {
           reactFlowInstance.current = instance;
+          // Auto-fit view on init with padding
+          setTimeout(() => instance.fitView({ padding: 0.2, duration: 300 }), 100);
         }}
         onDragOver={onDragOver}
         onDrop={onDrop}
@@ -473,6 +1034,7 @@ function SpecRendererInner({
         onPaneClick={onPaneClick}
         nodeTypes={nodeTypes}
         fitView
+        fitViewOptions={{ padding: 0.2, includeHiddenNodes: false }}
         deleteKeyCode={null} // We handle delete ourselves
         nodesDraggable={editable}
         nodesConnectable={editable}
@@ -488,10 +1050,113 @@ function SpecRendererInner({
         />
       </ReactFlow>
 
+      {/* Action Buttons */}
+      <div className="absolute bottom-4 right-4 z-10 flex gap-2">
+        {/* Results toggle */}
+        {bestTrial && (
+          <button
+            onClick={() => setShowResults(!showResults)}
+            className={`flex items-center gap-2 px-3 py-2 rounded-lg transition-colors border ${
+              showResults
+                ? 'bg-primary-600/90 text-white border-primary-500 hover:bg-primary-500'
+                : 'bg-dark-800 text-dark-300 border-dark-600 hover:text-white hover:border-dark-500'
+            }`}
+            title={showResults ? "Hide Results" : "Show Best Trial Results"}
+          >
+            {showResults ? <Eye size={16} /> : <EyeOff size={16} />}
+            <span className="text-sm font-medium">Results</span>
+          </button>
+        )}
+
+        {/* Validate button - shows validation status */}
+        <button
+          onClick={handleValidate}
+          className={`flex items-center gap-2 px-3 py-2 rounded-lg transition-colors border ${
+            validationStatus === 'valid'
+              ? 'bg-green-600/20 text-green-400 border-green-500/50 hover:bg-green-600/30'
+              : validationStatus === 'invalid'
+              ? 'bg-red-600/20 text-red-400 border-red-500/50 hover:bg-red-600/30'
+              : 'bg-dark-800 text-dark-300 border-dark-600 hover:text-white hover:border-dark-500'
+          }`}
+          title="Validate spec before running"
+        >
+          {validationStatus === 'valid' ? (
+            <CheckCircle size={16} />
+          ) : validationStatus === 'invalid' ? (
+            <AlertCircle size={16} />
+          ) : (
+            <CheckCircle size={16} />
+          )}
+          <span className="text-sm font-medium">Validate</span>
+        </button>
+
+        {/* Run/Stop button */}
+        {isRunning ? (
+          <button
+            onClick={handleStop}
+            className="flex items-center gap-2 px-4 py-2 bg-red-600 text-white rounded-lg hover:bg-red-500 shadow-lg transition-colors font-medium"
+          >
+            <Square size={16} fill="currentColor" />
+            Stop
+          </button>
+        ) : (
+          <button
+            onClick={handleRun}
+            disabled={isStarting || validationStatus === 'invalid'}
+            className={`flex items-center gap-2 px-4 py-2 rounded-lg shadow-lg transition-colors font-medium ${
+              validationStatus === 'invalid'
+                ? 'bg-dark-700 text-dark-400 cursor-not-allowed'
+                : 'bg-emerald-600 text-white hover:bg-emerald-500 disabled:opacity-50 disabled:cursor-not-allowed'
+            }`}
+            title={validationStatus === 'invalid' ? 'Fix validation errors first' : 'Start optimization'}
+          >
+            {isStarting ? (
+              <Loader2 size={16} className="animate-spin" />
+            ) : (
+              <Play size={16} fill="currentColor" />
+            )}
+            Run
+          </button>
+        )}
+      </div>
+
       {/* Study name badge */}
       <div className="absolute bottom-4 left-4 z-10 px-3 py-1.5 bg-dark-800/90 backdrop-blur rounded-lg border border-dark-600">
         <span className="text-sm text-dark-300">{spec.meta.study_name}</span>
       </div>
+
+      {/* Progress indicator when running */}
+      {isRunning && wsProgress && (
+        <div className="absolute bottom-4 left-1/2 -translate-x-1/2 z-10 flex items-center gap-3 px-4 py-2 bg-dark-800/95 backdrop-blur rounded-lg border border-dark-600 shadow-lg">
+          <ProgressRing 
+            progress={wsProgress.percentage} 
+            size={36} 
+            strokeWidth={3}
+            color="#10b981"
+          />
+          <div className="flex flex-col">
+            <span className="text-sm font-medium text-white">
+              Trial {wsProgress.current} / {wsProgress.total}
+            </span>
+            <span className="text-xs text-dark-400">
+              {wsProgress.fea_count > 0 && `${wsProgress.fea_count} FEA`}
+              {wsProgress.fea_count > 0 && wsProgress.nn_count > 0 && ' + '}
+              {wsProgress.nn_count > 0 && `${wsProgress.nn_count} NN`}
+              {wsProgress.fea_count === 0 && wsProgress.nn_count === 0 && 'Running...'}
+            </span>
+          </div>
+          {wsBestTrial && (
+            <div className="flex flex-col border-l border-dark-600 pl-3 ml-1">
+              <span className="text-xs text-dark-400">Best</span>
+              <span className="text-sm font-medium text-emerald-400">
+                {typeof wsBestTrial.value === 'number' 
+                  ? wsBestTrial.value.toFixed(4) 
+                  : wsBestTrial.value}
+              </span>
+            </div>
+          )}
+        </div>
+      )}
     </div>
   );
 }

atomizer-dashboard/frontend/src/components/canvas/index.ts

@@ -1,5 +1,6 @@
 // Main Canvas Component
 export { AtomizerCanvas } from './AtomizerCanvas';
+export { SpecRenderer } from './SpecRenderer';
 
 // Palette
 export { NodePalette } from './palette/NodePalette';

atomizer-dashboard/frontend/src/components/canvas/nodes/ConstraintNode.tsx

@@ -2,12 +2,14 @@ import { memo } from 'react';
 import { NodeProps } from 'reactflow';
 import { ShieldAlert } from 'lucide-react';
 import { BaseNode } from './BaseNode';
+import { ResultBadge } from './ResultBadge';
 import { ConstraintNodeData } from '../../../lib/canvas/schema';
 
 function ConstraintNodeComponent(props: NodeProps<ConstraintNodeData>) {
   const { data } = props;
   return (
     <BaseNode {...props} icon={<ShieldAlert size={16} />} iconColor="text-amber-400">
+      <ResultBadge value={data.resultValue} isFeasible={data.isFeasible} />
       {data.name && data.operator && data.value !== undefined
         ? `${data.name} ${data.operator} ${data.value}`
         : 'Set constraint'}

atomizer-dashboard/frontend/src/components/canvas/nodes/CustomExtractorNode.tsx

@@ -0,0 +1,58 @@
+/**
+ * CustomExtractorNode - Canvas node for custom Python extractors
+ *
+ * Displays custom extractors defined with inline Python code.
+ * Visually distinct from builtin extractors with a code icon.
+ *
+ * P3.11: Custom extractor UI component
+ */
+
+import { memo } from 'react';
+import { NodeProps } from 'reactflow';
+import { Code2 } from 'lucide-react';
+import { BaseNode } from './BaseNode';
+
+export interface CustomExtractorNodeData {
+  type: 'customExtractor';
+  label: string;
+  configured: boolean;
+  extractorId?: string;
+  extractorName?: string;
+  functionName?: string;
+  functionSource?: string;
+  outputs?: Array<{ name: string; units?: string }>;
+  dependencies?: string[];
+}
+
+function CustomExtractorNodeComponent(props: NodeProps<CustomExtractorNodeData>) {
+  const { data } = props;
+
+  // Show validation status
+  const hasCode = !!data.functionSource?.trim();
+  const hasOutputs = (data.outputs?.length ?? 0) > 0;
+  const isConfigured = hasCode && hasOutputs;
+
+  return (
+    <BaseNode
+      {...props}
+      icon={<Code2 size={16} />}
+      iconColor={isConfigured ? 'text-violet-400' : 'text-dark-500'}
+    >
+      <div className="flex flex-col">
+        <span className={isConfigured ? 'text-white' : 'text-dark-400'}>
+          {data.extractorName || data.functionName || 'Custom Extractor'}
+        </span>
+        {!isConfigured && (
+          <span className="text-xs text-amber-400">Needs configuration</span>
+        )}
+        {isConfigured && data.outputs && (
+          <span className="text-xs text-dark-400">
+            {data.outputs.length} output{data.outputs.length !== 1 ? 's' : ''}
+          </span>
+        )}
+      </div>
+    </BaseNode>
+  );
+}
+
+export const CustomExtractorNode = memo(CustomExtractorNodeComponent);

atomizer-dashboard/frontend/src/components/canvas/nodes/DesignVarNode.tsx

@@ -2,12 +2,14 @@ import { memo } from 'react';
 import { NodeProps } from 'reactflow';
 import { SlidersHorizontal } from 'lucide-react';
 import { BaseNode } from './BaseNode';
+import { ResultBadge } from './ResultBadge';
 import { DesignVarNodeData } from '../../../lib/canvas/schema';
 
 function DesignVarNodeComponent(props: NodeProps<DesignVarNodeData>) {
   const { data } = props;
   return (
     <BaseNode {...props} icon={<SlidersHorizontal size={16} />} iconColor="text-emerald-400" inputs={0} outputs={1}>
+      <ResultBadge value={data.resultValue} unit={data.unit} />
       {data.expressionName ? (
         <span className="font-mono">{data.expressionName}</span>
       ) : (

atomizer-dashboard/frontend/src/components/canvas/nodes/ExtractorNode.tsx

@@ -2,12 +2,14 @@ import { memo } from 'react';
 import { NodeProps } from 'reactflow';
 import { FlaskConical } from 'lucide-react';
 import { BaseNode } from './BaseNode';
+import { ResultBadge } from './ResultBadge';
 import { ExtractorNodeData } from '../../../lib/canvas/schema';
 
 function ExtractorNodeComponent(props: NodeProps<ExtractorNodeData>) {
   const { data } = props;
   return (
     <BaseNode {...props} icon={<FlaskConical size={16} />} iconColor="text-cyan-400">
+      <ResultBadge value={data.resultValue} />
       {data.extractorName || 'Select extractor'}
     </BaseNode>
   );

atomizer-dashboard/frontend/src/components/canvas/nodes/ObjectiveNode.tsx

@@ -2,13 +2,38 @@ import { memo } from 'react';
 import { NodeProps } from 'reactflow';
 import { Target } from 'lucide-react';
 import { BaseNode } from './BaseNode';
+import { ResultBadge } from './ResultBadge';
+import { ConvergenceSparkline } from '../visualization/ConvergenceSparkline';
 import { ObjectiveNodeData } from '../../../lib/canvas/schema';
 
 function ObjectiveNodeComponent(props: NodeProps<ObjectiveNodeData>) {
   const { data } = props;
+  const hasHistory = data.history && data.history.length > 1;
+  
   return (
     <BaseNode {...props} icon={<Target size={16} />} iconColor="text-rose-400">
-      {data.name ? `${data.direction === 'maximize' ? '↑' : '↓'} ${data.name}` : 'Set objective'}
+      <div className="flex flex-col gap-1">
+        <div className="flex items-center justify-between">
+          <span className="text-sm">
+            {data.name ? `${data.direction === 'maximize' ? '↑' : '↓'} ${data.name}` : 'Set objective'}
+          </span>
+          <ResultBadge value={data.resultValue} label="Best" />
+        </div>
+        
+        {/* Convergence sparkline */}
+        {hasHistory && (
+          <div className="mt-1 -mb-1">
+            <ConvergenceSparkline 
+              values={data.history!}
+              width={120}
+              height={20}
+              direction={data.direction || 'minimize'}
+              color={data.direction === 'maximize' ? '#34d399' : '#60a5fa'}
+              showBest={true}
+            />
+          </div>
+        )}
+      </div>
     </BaseNode>
   );
 }

atomizer-dashboard/frontend/src/components/canvas/nodes/ResultBadge.tsx

@@ -0,0 +1,39 @@
+import { memo } from 'react';
+
+interface ResultBadgeProps {
+  value: number | string | null | undefined;
+  unit?: string;
+  isFeasible?: boolean; // For constraints
+  label?: string;
+}
+
+export const ResultBadge = memo(function ResultBadge({ value, unit, isFeasible, label }: ResultBadgeProps) {
+  if (value === null || value === undefined) return null;
+
+  const displayValue = typeof value === 'number' 
+    ? value.toLocaleString(undefined, { maximumFractionDigits: 4 }) 
+    : value;
+
+  // Determine color based on feasibility (if provided)
+  let bgColor = 'bg-primary-500/20';
+  let textColor = 'text-primary-300';
+  let borderColor = 'border-primary-500/30';
+
+  if (isFeasible === true) {
+    bgColor = 'bg-emerald-500/20';
+    textColor = 'text-emerald-300';
+    borderColor = 'border-emerald-500/30';
+  } else if (isFeasible === false) {
+    bgColor = 'bg-red-500/20';
+    textColor = 'text-red-300';
+    borderColor = 'border-red-500/30';
+  }
+
+  return (
+    <div className={`absolute -top-3 -right-2 px-2 py-0.5 rounded-full border ${bgColor} ${borderColor} ${textColor} text-xs font-mono shadow-lg backdrop-blur-sm z-10 flex items-center gap-1`}>
+      {label && <span className="opacity-70 mr-1">{label}:</span>}
+      <span className="font-bold">{displayValue}</span>
+      {unit && <span className="opacity-70 text-[10px] ml-0.5">{unit}</span>}
+    </div>
+  );
+});

atomizer-dashboard/frontend/src/components/canvas/nodes/SolverNode.tsx

@@ -1,14 +1,44 @@
 import { memo } from 'react';
 import { NodeProps } from 'reactflow';
-import { Cpu } from 'lucide-react';
+import { Cpu, Terminal } from 'lucide-react';
 import { BaseNode } from './BaseNode';
-import { SolverNodeData } from '../../../lib/canvas/schema';
+import { SolverNodeData, SolverEngine } from '../../../lib/canvas/schema';
+
+// Human-readable engine names
+const ENGINE_LABELS: Record<SolverEngine, string> = {
+  nxnastran: 'NX Nastran',
+  mscnastran: 'MSC Nastran',
+  python: 'Python Script',
+  abaqus: 'Abaqus',
+  ansys: 'ANSYS',
+};
 
 function SolverNodeComponent(props: NodeProps<SolverNodeData>) {
   const { data } = props;
+  
+  // Build display string: "Engine - SolutionType" or just one
+  const engineLabel = data.engine ? ENGINE_LABELS[data.engine] : null;
+  const solverTypeLabel = data.solverType || null;
+  
+  let displayText: string;
+  if (engineLabel && solverTypeLabel) {
+    displayText = `${engineLabel} (${solverTypeLabel})`;
+  } else if (engineLabel) {
+    displayText = engineLabel;
+  } else if (solverTypeLabel) {
+    displayText = solverTypeLabel;
+  } else {
+    displayText = 'Configure solver';
+  }
+  
+  // Use Terminal icon for Python, Cpu for others
+  const icon = data.engine === 'python' 
+    ? <Terminal size={16} /> 
+    : <Cpu size={16} />;
+  
   return (
-    <BaseNode {...props} icon={<Cpu size={16} />} iconColor="text-violet-400">
-      {data.solverType || 'Select solution'}
+    <BaseNode {...props} icon={icon} iconColor="text-violet-400">
+      {displayText}
     </BaseNode>
   );
 }

atomizer-dashboard/frontend/src/components/canvas/palette/NodePalette.tsx

@@ -54,6 +54,9 @@ export interface NodePaletteProps {
 // Constants
 // ============================================================================
 
+/** Singleton node types - only one of each allowed on canvas */
+export const SINGLETON_TYPES: NodeType[] = ['model', 'solver', 'algorithm', 'surrogate'];
+
 export const PALETTE_ITEMS: PaletteItem[] = [
   { 
     type: 'model', 
@@ -61,15 +64,15 @@ export const PALETTE_ITEMS: PaletteItem[] = [
     icon: Box, 
     description: 'NX model file (.prt, .sim)', 
     color: 'text-blue-400',
-    canAdd: false, // Synthetic - derived from spec
+    canAdd: true, // Singleton - only one allowed
   },
   { 
     type: 'solver', 
     label: 'Solver', 
     icon: Cpu, 
-    description: 'Nastran solution type', 
+    description: 'Analysis solver config', 
     color: 'text-violet-400',
-    canAdd: false, // Synthetic - derived from model
+    canAdd: true, // Singleton - only one allowed
   },
   { 
     type: 'designVar', 
@@ -109,7 +112,7 @@ export const PALETTE_ITEMS: PaletteItem[] = [
     icon: BrainCircuit, 
     description: 'Optimization method', 
     color: 'text-indigo-400',
-    canAdd: false, // Synthetic - derived from spec.optimization
+    canAdd: true, // Singleton - only one allowed
   },
   { 
     type: 'surrogate', 
@@ -117,7 +120,7 @@ export const PALETTE_ITEMS: PaletteItem[] = [
     icon: Rocket, 
     description: 'Neural acceleration', 
     color: 'text-pink-400',
-    canAdd: false, // Synthetic - derived from spec.optimization.surrogate
+    canAdd: true, // Singleton - only one allowed
   },
 ];
 

atomizer-dashboard/frontend/src/components/canvas/panels/CustomExtractorPanel.tsx

@@ -0,0 +1,360 @@
+/**
+ * CustomExtractorPanel - Panel for editing custom Python extractors
+ *
+ * Provides a code editor for writing custom extraction functions,
+ * output definitions, and validation.
+ *
+ * P3.12: Custom extractor UI component
+ */
+
+import { useState, useCallback } from 'react';
+import { X, Play, AlertCircle, CheckCircle, Plus, Trash2, HelpCircle } from 'lucide-react';
+
+interface CustomExtractorOutput {
+  name: string;
+  units?: string;
+  description?: string;
+}
+
+interface CustomExtractorPanelProps {
+  isOpen: boolean;
+  onClose: () => void;
+  initialName?: string;
+  initialFunctionName?: string;
+  initialSource?: string;
+  initialOutputs?: CustomExtractorOutput[];
+  initialDependencies?: string[];
+  onSave: (data: {
+    name: string;
+    functionName: string;
+    source: string;
+    outputs: CustomExtractorOutput[];
+    dependencies: string[];
+  }) => void;
+}
+
+// Common styling classes
+const inputClass =
+  'w-full px-3 py-2 bg-dark-800 border border-dark-600 text-white placeholder-dark-400 rounded-lg focus:border-primary-500 focus:outline-none transition-colors';
+const labelClass = 'block text-sm font-medium text-dark-300 mb-1';
+
+// Default extractor template
+const DEFAULT_SOURCE = `def extract(op2_path, bdf_path=None, params=None, working_dir=None):
+    """
+    Custom extractor function.
+
+    Args:
+        op2_path: Path to the OP2 results file
+        bdf_path: Optional path to the BDF model file
+        params: Dictionary of current design parameters
+        working_dir: Path to the current trial directory
+
+    Returns:
+        Dictionary of output_name -> value
+        OR a single float value
+        OR a list/tuple of values (mapped to outputs in order)
+    """
+    import numpy as np
+    from pyNastran.op2.op2 import OP2
+
+    # Load OP2 results
+    op2 = OP2(op2_path, debug=False)
+
+    # Example: compute custom metric
+    # ... your extraction logic here ...
+
+    result = 0.0
+
+    return {"custom_output": result}
+`;
+
+export function CustomExtractorPanel({
+  isOpen,
+  onClose,
+  initialName = '',
+  initialFunctionName = 'extract',
+  initialSource = DEFAULT_SOURCE,
+  initialOutputs = [{ name: 'custom_output', units: '' }],
+  initialDependencies = [],
+  onSave,
+}: CustomExtractorPanelProps) {
+  const [name, setName] = useState(initialName);
+  const [functionName, setFunctionName] = useState(initialFunctionName);
+  const [source, setSource] = useState(initialSource);
+  const [outputs, setOutputs] = useState<CustomExtractorOutput[]>(initialOutputs);
+  const [dependencies] = useState<string[]>(initialDependencies);
+  const [validation, setValidation] = useState<{
+    valid: boolean;
+    errors: string[];
+  } | null>(null);
+  const [isValidating, setIsValidating] = useState(false);
+  const [showHelp, setShowHelp] = useState(false);
+
+  // Add a new output
+  const addOutput = useCallback(() => {
+    setOutputs((prev) => [...prev, { name: '', units: '' }]);
+  }, []);
+
+  // Remove an output
+  const removeOutput = useCallback((index: number) => {
+    setOutputs((prev) => prev.filter((_, i) => i !== index));
+  }, []);
+
+  // Update an output
+  const updateOutput = useCallback(
+    (index: number, field: keyof CustomExtractorOutput, value: string) => {
+      setOutputs((prev) =>
+        prev.map((out, i) => (i === index ? { ...out, [field]: value } : out))
+      );
+    },
+    []
+  );
+
+  // Validate the code
+  const validateCode = useCallback(async () => {
+    setIsValidating(true);
+    setValidation(null);
+
+    try {
+      const response = await fetch('/api/spec/validate-extractor', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          function_name: functionName,
+          source: source,
+        }),
+      });
+
+      const result = await response.json();
+      setValidation({
+        valid: result.valid,
+        errors: result.errors || [],
+      });
+    } catch (error) {
+      setValidation({
+        valid: false,
+        errors: ['Failed to validate: ' + (error instanceof Error ? error.message : 'Unknown error')],
+      });
+    } finally {
+      setIsValidating(false);
+    }
+  }, [functionName, source]);
+
+  // Handle save
+  const handleSave = useCallback(() => {
+    // Filter out empty outputs
+    const validOutputs = outputs.filter((o) => o.name.trim());
+
+    if (!name.trim()) {
+      setValidation({ valid: false, errors: ['Name is required'] });
+      return;
+    }
+
+    if (validOutputs.length === 0) {
+      setValidation({ valid: false, errors: ['At least one output is required'] });
+      return;
+    }
+
+    onSave({
+      name: name.trim(),
+      functionName: functionName.trim() || 'extract',
+      source,
+      outputs: validOutputs,
+      dependencies: dependencies.filter((d) => d.trim()),
+    });
+    onClose();
+  }, [name, functionName, source, outputs, dependencies, onSave, onClose]);
+
+  if (!isOpen) return null;
+
+  return (
+    <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-50">
+      <div className="bg-dark-850 rounded-xl shadow-2xl w-[900px] max-h-[90vh] flex flex-col border border-dark-700">
+        {/* Header */}
+        <div className="flex items-center justify-between px-6 py-4 border-b border-dark-700">
+          <h2 className="text-lg font-semibold text-white">Custom Extractor</h2>
+          <div className="flex items-center gap-2">
+            <button
+              onClick={() => setShowHelp(!showHelp)}
+              className="p-2 text-dark-400 hover:text-white hover:bg-dark-700 rounded-lg transition-colors"
+              title="Show help"
+            >
+              <HelpCircle size={20} />
+            </button>
+            <button
+              onClick={onClose}
+              className="p-2 text-dark-400 hover:text-white hover:bg-dark-700 rounded-lg transition-colors"
+            >
+              <X size={20} />
+            </button>
+          </div>
+        </div>
+
+        {/* Content */}
+        <div className="flex-1 overflow-auto p-6">
+          {/* Help Section */}
+          {showHelp && (
+            <div className="mb-4 p-4 bg-primary-900/20 border border-primary-700 rounded-lg">
+              <h3 className="text-sm font-semibold text-primary-400 mb-2">How Custom Extractors Work</h3>
+              <ul className="text-sm text-dark-300 space-y-1">
+                <li>• Your function receives the path to OP2 results and optional BDF/params</li>
+                <li>• Use pyNastran, numpy, scipy for data extraction and analysis</li>
+                <li>• Return a dictionary mapping output names to numeric values</li>
+                <li>• Outputs can be used as objectives or constraints in optimization</li>
+                <li>• Code runs in a sandboxed environment (no file I/O beyond OP2/BDF)</li>
+              </ul>
+            </div>
+          )}
+
+          <div className="grid grid-cols-2 gap-6">
+            {/* Left Column - Basic Info & Outputs */}
+            <div className="space-y-4">
+              {/* Name */}
+              <div>
+                <label className={labelClass}>Extractor Name</label>
+                <input
+                  type="text"
+                  value={name}
+                  onChange={(e) => setName(e.target.value)}
+                  placeholder="My Custom Extractor"
+                  className={inputClass}
+                />
+              </div>
+
+              {/* Function Name */}
+              <div>
+                <label className={labelClass}>Function Name</label>
+                <input
+                  type="text"
+                  value={functionName}
+                  onChange={(e) => setFunctionName(e.target.value)}
+                  placeholder="extract"
+                  className={`${inputClass} font-mono`}
+                />
+                <p className="text-xs text-dark-500 mt-1">
+                  Name of the Python function in your code
+                </p>
+              </div>
+
+              {/* Outputs */}
+              <div>
+                <label className={labelClass}>Outputs</label>
+                <div className="space-y-2">
+                  {outputs.map((output, index) => (
+                    <div key={index} className="flex gap-2">
+                      <input
+                        type="text"
+                        value={output.name}
+                        onChange={(e) => updateOutput(index, 'name', e.target.value)}
+                        placeholder="output_name"
+                        className={`${inputClass} font-mono flex-1`}
+                      />
+                      <input
+                        type="text"
+                        value={output.units || ''}
+                        onChange={(e) => updateOutput(index, 'units', e.target.value)}
+                        placeholder="units"
+                        className={`${inputClass} w-24`}
+                      />
+                      <button
+                        onClick={() => removeOutput(index)}
+                        className="p-2 text-red-400 hover:text-red-300 hover:bg-red-900/20 rounded-lg transition-colors"
+                        disabled={outputs.length === 1}
+                      >
+                        <Trash2 size={16} />
+                      </button>
+                    </div>
+                  ))}
+                  <button
+                    onClick={addOutput}
+                    className="flex items-center gap-1 text-sm text-primary-400 hover:text-primary-300 transition-colors"
+                  >
+                    <Plus size={14} />
+                    Add Output
+                  </button>
+                </div>
+              </div>
+
+              {/* Validation Status */}
+              {validation && (
+                <div
+                  className={`p-3 rounded-lg border ${
+                    validation.valid
+                      ? 'bg-green-900/20 border-green-700'
+                      : 'bg-red-900/20 border-red-700'
+                  }`}
+                >
+                  <div className="flex items-center gap-2">
+                    {validation.valid ? (
+                      <CheckCircle size={16} className="text-green-400" />
+                    ) : (
+                      <AlertCircle size={16} className="text-red-400" />
+                    )}
+                    <span
+                      className={`text-sm font-medium ${
+                        validation.valid ? 'text-green-400' : 'text-red-400'
+                      }`}
+                    >
+                      {validation.valid ? 'Code is valid' : 'Validation failed'}
+                    </span>
+                  </div>
+                  {validation.errors.length > 0 && (
+                    <ul className="mt-2 text-sm text-red-300 space-y-1">
+                      {validation.errors.map((err, i) => (
+                        <li key={i}>• {err}</li>
+                      ))}
+                    </ul>
+                  )}
+                </div>
+              )}
+            </div>
+
+            {/* Right Column - Code Editor */}
+            <div className="space-y-2">
+              <div className="flex items-center justify-between">
+                <label className={labelClass}>Python Code</label>
+                <button
+                  onClick={validateCode}
+                  disabled={isValidating}
+                  className="flex items-center gap-1 px-3 py-1 bg-primary-600 hover:bg-primary-500
+                             text-white text-sm rounded-lg transition-colors disabled:opacity-50"
+                >
+                  <Play size={14} />
+                  {isValidating ? 'Validating...' : 'Validate'}
+                </button>
+              </div>
+              <textarea
+                value={source}
+                onChange={(e) => {
+                  setSource(e.target.value);
+                  setValidation(null);
+                }}
+                className={`${inputClass} h-[400px] font-mono text-sm resize-none`}
+                spellCheck={false}
+              />
+              <p className="text-xs text-dark-500">
+                Available modules: numpy, scipy, pyNastran, math, statistics
+              </p>
+            </div>
+          </div>
+        </div>
+
+        {/* Footer */}
+        <div className="flex items-center justify-end gap-3 px-6 py-4 border-t border-dark-700">
+          <button
+            onClick={onClose}
+            className="px-4 py-2 text-dark-300 hover:text-white hover:bg-dark-700 rounded-lg transition-colors"
+          >
+            Cancel
+          </button>
+          <button
+            onClick={handleSave}
+            className="px-4 py-2 bg-primary-600 hover:bg-primary-500 text-white rounded-lg transition-colors"
+          >
+            Save Extractor
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}

atomizer-dashboard/frontend/src/components/canvas/panels/ErrorPanel.tsx

@@ -0,0 +1,255 @@
+/**
+ * ErrorPanel - Displays optimization errors with recovery options
+ * 
+ * Shows errors that occurred during optimization with:
+ * - Error classification (NX crash, solver failure, etc.)
+ * - Recovery suggestions
+ * - Ability to dismiss individual errors
+ * - Support for multiple simultaneous errors
+ */
+
+import { useMemo } from 'react';
+import {
+  X,
+  AlertTriangle,
+  AlertOctagon,
+  RefreshCw,
+  Minimize2,
+  Maximize2,
+  Trash2,
+  Bug,
+  Cpu,
+  FileWarning,
+  Settings,
+  Server,
+} from 'lucide-react';
+import { useErrorPanel, usePanelStore, OptimizationError } from '../../../hooks/usePanelStore';
+
+interface ErrorPanelProps {
+  onClose: () => void;
+  onRetry?: (trial?: number) => void;
+  onSkipTrial?: (trial: number) => void;
+}
+
+export function ErrorPanel({ onClose, onRetry, onSkipTrial }: ErrorPanelProps) {
+  const panel = useErrorPanel();
+  const { minimizePanel, dismissError, clearErrors } = usePanelStore();
+
+  const sortedErrors = useMemo(() => {
+    return [...panel.errors].sort((a, b) => b.timestamp - a.timestamp);
+  }, [panel.errors]);
+
+  if (!panel.open || panel.errors.length === 0) return null;
+
+  // Minimized view
+  if (panel.minimized) {
+    return (
+      <div 
+        className="bg-dark-850 border border-red-500/50 rounded-lg shadow-xl flex items-center gap-2 px-3 py-2 cursor-pointer hover:bg-dark-800 transition-colors"
+        onClick={() => minimizePanel('error')}
+      >
+        <AlertOctagon size={16} className="text-red-400" />
+        <span className="text-sm text-white font-medium">
+          {panel.errors.length} Error{panel.errors.length !== 1 ? 's' : ''}
+        </span>
+        <Maximize2 size={14} className="text-dark-400" />
+      </div>
+    );
+  }
+
+  return (
+    <div className="bg-dark-850 border border-red-500/30 rounded-xl w-[420px] max-h-[500px] flex flex-col shadow-xl">
+      {/* Header */}
+      <div className="flex items-center justify-between px-4 py-3 border-b border-dark-700 bg-red-500/5">
+        <div className="flex items-center gap-2">
+          <AlertOctagon size={18} className="text-red-400" />
+          <span className="font-medium text-white">
+            Optimization Errors ({panel.errors.length})
+          </span>
+        </div>
+        <div className="flex items-center gap-1">
+          {panel.errors.length > 1 && (
+            <button
+              onClick={clearErrors}
+              className="p-1.5 text-dark-400 hover:text-red-400 hover:bg-red-500/10 rounded transition-colors"
+              title="Clear all errors"
+            >
+              <Trash2 size={14} />
+            </button>
+          )}
+          <button
+            onClick={() => minimizePanel('error')}
+            className="p-1.5 text-dark-400 hover:text-white hover:bg-dark-700 rounded transition-colors"
+            title="Minimize"
+          >
+            <Minimize2 size={14} />
+          </button>
+          <button
+            onClick={onClose}
+            className="p-1.5 text-dark-400 hover:text-white hover:bg-dark-700 rounded transition-colors"
+          >
+            <X size={14} />
+          </button>
+        </div>
+      </div>
+
+      {/* Content */}
+      <div className="flex-1 overflow-y-auto p-3 space-y-3">
+        {sortedErrors.map((error) => (
+          <ErrorItem
+            key={error.timestamp}
+            error={error}
+            onDismiss={() => dismissError(error.timestamp)}
+            onRetry={onRetry}
+            onSkipTrial={onSkipTrial}
+          />
+        ))}
+      </div>
+    </div>
+  );
+}
+
+// ============================================================================
+// Error Item Component
+// ============================================================================
+
+interface ErrorItemProps {
+  error: OptimizationError;
+  onDismiss: () => void;
+  onRetry?: (trial?: number) => void;
+  onSkipTrial?: (trial: number) => void;
+}
+
+function ErrorItem({ error, onDismiss, onRetry, onSkipTrial }: ErrorItemProps) {
+  const icon = getErrorIcon(error.type);
+  const typeLabel = getErrorTypeLabel(error.type);
+  const timeAgo = getTimeAgo(error.timestamp);
+
+  return (
+    <div className="bg-dark-800 rounded-lg border border-dark-700 overflow-hidden">
+      {/* Error header */}
+      <div className="flex items-start gap-3 p-3">
+        <div className="p-2 bg-red-500/10 rounded-lg flex-shrink-0">
+          {icon}
+        </div>
+        <div className="flex-1 min-w-0">
+          <div className="flex items-center gap-2 mb-1">
+            <span className="text-xs font-medium text-red-400 uppercase tracking-wide">
+              {typeLabel}
+            </span>
+            {error.trial !== undefined && (
+              <span className="text-xs text-dark-500">
+                Trial #{error.trial}
+              </span>
+            )}
+            <span className="text-xs text-dark-600 ml-auto">
+              {timeAgo}
+            </span>
+          </div>
+          <p className="text-sm text-white">{error.message}</p>
+          {error.details && (
+            <p className="text-xs text-dark-400 mt-1 font-mono bg-dark-900 p-2 rounded mt-2 max-h-20 overflow-y-auto">
+              {error.details}
+            </p>
+          )}
+        </div>
+        <button
+          onClick={onDismiss}
+          className="p-1 text-dark-500 hover:text-white hover:bg-dark-700 rounded transition-colors flex-shrink-0"
+          title="Dismiss"
+        >
+          <X size={14} />
+        </button>
+      </div>
+
+      {/* Suggestions */}
+      {error.suggestions.length > 0 && (
+        <div className="px-3 pb-3">
+          <p className="text-xs text-dark-500 mb-1.5">Suggestions:</p>
+          <ul className="text-xs text-dark-300 space-y-1">
+            {error.suggestions.map((suggestion, idx) => (
+              <li key={idx} className="flex items-start gap-1.5">
+                <span className="text-dark-500">-</span>
+                <span>{suggestion}</span>
+              </li>
+            ))}
+          </ul>
+        </div>
+      )}
+
+      {/* Actions */}
+      {error.recoverable && (
+        <div className="flex items-center gap-2 px-3 pb-3">
+          {onRetry && (
+            <button
+              onClick={() => onRetry(error.trial)}
+              className="flex items-center gap-1.5 px-3 py-1.5 bg-primary-600 hover:bg-primary-500 
+                         text-white text-xs font-medium rounded transition-colors"
+            >
+              <RefreshCw size={12} />
+              Retry{error.trial !== undefined ? ' Trial' : ''}
+            </button>
+          )}
+          {onSkipTrial && error.trial !== undefined && (
+            <button
+              onClick={() => onSkipTrial(error.trial!)}
+              className="flex items-center gap-1.5 px-3 py-1.5 bg-dark-700 hover:bg-dark-600 
+                         text-dark-200 text-xs font-medium rounded transition-colors"
+            >
+              Skip Trial
+            </button>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
+
+// ============================================================================
+// Helper Functions
+// ============================================================================
+
+function getErrorIcon(type: OptimizationError['type']) {
+  switch (type) {
+    case 'nx_crash':
+      return <Cpu size={16} className="text-red-400" />;
+    case 'solver_fail':
+      return <AlertTriangle size={16} className="text-amber-400" />;
+    case 'extractor_error':
+      return <FileWarning size={16} className="text-orange-400" />;
+    case 'config_error':
+      return <Settings size={16} className="text-blue-400" />;
+    case 'system_error':
+      return <Server size={16} className="text-purple-400" />;
+    default:
+      return <Bug size={16} className="text-red-400" />;
+  }
+}
+
+function getErrorTypeLabel(type: OptimizationError['type']) {
+  switch (type) {
+    case 'nx_crash':
+      return 'NX Crash';
+    case 'solver_fail':
+      return 'Solver Failure';
+    case 'extractor_error':
+      return 'Extractor Error';
+    case 'config_error':
+      return 'Configuration Error';
+    case 'system_error':
+      return 'System Error';
+    default:
+      return 'Unknown Error';
+  }
+}
+
+function getTimeAgo(timestamp: number): string {
+  const seconds = Math.floor((Date.now() - timestamp) / 1000);
+  
+  if (seconds < 60) return 'just now';
+  if (seconds < 3600) return `${Math.floor(seconds / 60)}m ago`;
+  if (seconds < 86400) return `${Math.floor(seconds / 3600)}h ago`;
+  return `${Math.floor(seconds / 86400)}d ago`;
+}
+
+export default ErrorPanel;

atomizer-dashboard/frontend/src/components/canvas/panels/FloatingIntrospectionPanel.tsx

@@ -0,0 +1,485 @@
+/**
+ * FloatingIntrospectionPanel - Persistent introspection panel using store
+ * 
+ * This is a wrapper around the existing IntrospectionPanel that:
+ * 1. Gets its state from usePanelStore instead of local state
+ * 2. Persists data when the panel is closed and reopened
+ * 3. Can be opened from anywhere without losing state
+ */
+
+import { useState, useEffect, useCallback, useMemo } from 'react';
+import {
+  X,
+  Search,
+  RefreshCw,
+  Plus,
+  ChevronDown,
+  ChevronRight,
+  Cpu,
+  SlidersHorizontal,
+  Scale,
+  Minimize2,
+  Maximize2,
+} from 'lucide-react';
+import { 
+  useIntrospectionPanel, 
+  usePanelStore,
+} from '../../../hooks/usePanelStore';
+import { useSpecStore } from '../../../hooks/useSpecStore';
+
+interface FloatingIntrospectionPanelProps {
+  onClose: () => void;
+}
+
+// Reuse types from original IntrospectionPanel
+interface Expression {
+  name: string;
+  value: number;
+  rhs?: string;
+  min?: number;
+  max?: number;
+  unit?: string;
+  units?: string;
+  type: string;
+  source?: string;
+}
+
+interface ExpressionsResult {
+  user: Expression[];
+  internal: Expression[];
+  total_count: number;
+  user_count: number;
+}
+
+interface IntrospectionResult {
+  solver_type?: string;
+  expressions?: ExpressionsResult;
+  // Allow other properties from the API response
+  file_deps?: unknown[];
+  fea_results?: unknown[];
+  fem_mesh?: unknown;
+  sim_solutions?: unknown[];
+  sim_bcs?: unknown[];
+  mass_properties?: {
+    total_mass?: number;
+    center_of_gravity?: { x: number; y: number; z: number };
+    [key: string]: unknown;
+  };
+}
+
+interface ModelFileInfo {
+  name: string;
+  stem: string;
+  type: string;
+  description?: string;
+  size_kb: number;
+  has_cache: boolean;
+}
+
+interface ModelFilesResponse {
+  files: {
+    sim: ModelFileInfo[];
+    afm: ModelFileInfo[];
+    fem: ModelFileInfo[];
+    idealized: ModelFileInfo[];
+    prt: ModelFileInfo[];
+  };
+  all_files: ModelFileInfo[];
+}
+
+export function FloatingIntrospectionPanel({ onClose }: FloatingIntrospectionPanelProps) {
+  const panel = useIntrospectionPanel();
+  const { 
+    minimizePanel, 
+    updateIntrospectionResult, 
+    setIntrospectionLoading, 
+    setIntrospectionError,
+    setIntrospectionFile,
+  } = usePanelStore();
+  const { addNode } = useSpecStore();
+
+  // Local UI state
+  const [expandedSections, setExpandedSections] = useState<Set<string>>(
+    new Set(['expressions', 'extractors', 'file_deps', 'fea_results', 'fem_mesh', 'sim_solutions', 'sim_bcs'])
+  );
+  const [searchTerm, setSearchTerm] = useState('');
+  const [modelFiles, setModelFiles] = useState<ModelFilesResponse | null>(null);
+  const [isLoadingFiles, setIsLoadingFiles] = useState(false);
+
+  const data = panel.data;
+  const result = data?.result as IntrospectionResult | undefined;
+  const isLoading = data?.isLoading || false;
+  const error = data?.error as string | null;
+
+  // Fetch available files when studyId changes
+  const fetchAvailableFiles = useCallback(async () => {
+    if (!data?.studyId) return;
+    
+    setIsLoadingFiles(true);
+    try {
+      const res = await fetch(`/api/optimization/studies/${data.studyId}/nx/parts`);
+      if (res.ok) {
+        const filesData = await res.json();
+        setModelFiles(filesData);
+      }
+    } catch (e) {
+      console.error('Failed to fetch model files:', e);
+    } finally {
+      setIsLoadingFiles(false);
+    }
+  }, [data?.studyId]);
+
+  // Run introspection
+  const runIntrospection = useCallback(async (fileName?: string) => {
+    if (!data?.filePath && !data?.studyId) return;
+
+    setIntrospectionLoading(true);
+    setIntrospectionError(null);
+    
+    try {
+      let res;
+      
+      if (data?.studyId) {
+        const endpoint = fileName 
+          ? `/api/optimization/studies/${data.studyId}/nx/introspect/${encodeURIComponent(fileName)}`
+          : `/api/optimization/studies/${data.studyId}/nx/introspect`;
+        res = await fetch(endpoint);
+      } else {
+        res = await fetch('/api/nx/introspect', {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({ file_path: data?.filePath }),
+        });
+      }
+      
+      if (!res.ok) {
+        const errData = await res.json().catch(() => ({}));
+        throw new Error(errData.detail || 'Introspection failed');
+      }
+      
+      const responseData = await res.json();
+      updateIntrospectionResult(responseData.introspection || responseData);
+    } catch (e) {
+      const msg = e instanceof Error ? e.message : 'Failed to introspect model';
+      setIntrospectionError(msg);
+      console.error('Introspection error:', e);
+    }
+  }, [data?.filePath, data?.studyId, setIntrospectionLoading, setIntrospectionError, updateIntrospectionResult]);
+
+  // Fetch files list on mount
+  useEffect(() => {
+    fetchAvailableFiles();
+  }, [fetchAvailableFiles]);
+
+  // Run introspection when panel opens or selected file changes
+  useEffect(() => {
+    if (panel.open && data && !result && !isLoading) {
+      runIntrospection(data.selectedFile);
+    }
+  }, [panel.open, data?.selectedFile]); // eslint-disable-line react-hooks/exhaustive-deps
+
+  const handleFileChange = (e: React.ChangeEvent<HTMLSelectElement>) => {
+    const newFile = e.target.value;
+    setIntrospectionFile(newFile);
+    runIntrospection(newFile);
+  };
+
+  const toggleSection = (section: string) => {
+    setExpandedSections((prev) => {
+      const next = new Set(prev);
+      if (next.has(section)) next.delete(section);
+      else next.add(section);
+      return next;
+    });
+  };
+
+  // Handle both array format (old) and object format (new API)
+  const allExpressions: Expression[] = useMemo(() => {
+    if (!result?.expressions) return [];
+    
+    if (Array.isArray(result.expressions)) {
+      return result.expressions as Expression[];
+    }
+    
+    const exprObj = result.expressions as ExpressionsResult;
+    return [...(exprObj.user || []), ...(exprObj.internal || [])];
+  }, [result?.expressions]);
+
+  const filteredExpressions = allExpressions.filter((e) =>
+    e.name.toLowerCase().includes(searchTerm.toLowerCase())
+  );
+
+  const addExpressionAsDesignVar = (expr: Expression) => {
+    const minValue = expr.min ?? expr.value * 0.5;
+    const maxValue = expr.max ?? expr.value * 1.5;
+    
+    addNode('designVar', {
+      name: expr.name,
+      expression_name: expr.name,
+      type: 'continuous',
+      bounds: { min: minValue, max: maxValue },
+      baseline: expr.value,
+      units: expr.unit || expr.units,
+      enabled: true,
+    });
+  };
+
+  if (!panel.open) return null;
+
+  // Minimized view
+  if (panel.minimized) {
+    return (
+      <div 
+        className="bg-dark-850 border border-dark-700 rounded-lg shadow-xl flex items-center gap-2 px-3 py-2 cursor-pointer hover:bg-dark-800 transition-colors"
+        onClick={() => minimizePanel('introspection')}
+      >
+        <Search size={16} className="text-primary-400" />
+        <span className="text-sm text-white font-medium">
+          Model Introspection
+          {data?.selectedFile && <span className="text-dark-400 ml-1">({data.selectedFile})</span>}
+        </span>
+        <Maximize2 size={14} className="text-dark-400" />
+      </div>
+    );
+  }
+
+  return (
+    <div className="bg-dark-850 border border-dark-700 rounded-xl w-80 max-h-[70vh] flex flex-col shadow-xl">
+      {/* Header */}
+      <div className="flex items-center justify-between px-4 py-3 border-b border-dark-700">
+        <div className="flex items-center gap-2">
+          <Search size={16} className="text-primary-400" />
+          <span className="font-medium text-white text-sm">
+            Model Introspection
+            {data?.selectedFile && <span className="text-primary-400 ml-1">({data.selectedFile})</span>}
+          </span>
+        </div>
+        <div className="flex items-center gap-1">
+          <button
+            onClick={() => runIntrospection(data?.selectedFile)}
+            disabled={isLoading}
+            className="p-1.5 text-dark-400 hover:text-white hover:bg-dark-700 rounded transition-colors"
+            title="Refresh"
+          >
+            <RefreshCw size={14} className={isLoading ? 'animate-spin' : ''} />
+          </button>
+          <button
+            onClick={() => minimizePanel('introspection')}
+            className="p-1.5 text-dark-400 hover:text-white hover:bg-dark-700 rounded transition-colors"
+            title="Minimize"
+          >
+            <Minimize2 size={14} />
+          </button>
+          <button
+            onClick={onClose}
+            className="p-1.5 text-dark-400 hover:text-white hover:bg-dark-700 rounded transition-colors"
+          >
+            <X size={14} />
+          </button>
+        </div>
+      </div>
+
+      {/* File Selector + Search */}
+      <div className="px-4 py-2 border-b border-dark-700 space-y-2">
+        {data?.studyId && modelFiles && modelFiles.all_files.length > 0 && (
+          <div className="flex items-center gap-2">
+            <label className="text-xs text-dark-400 whitespace-nowrap">File:</label>
+            <select
+              value={data?.selectedFile || ''}
+              onChange={handleFileChange}
+              disabled={isLoading || isLoadingFiles}
+              className="flex-1 px-2 py-1.5 bg-dark-800 border border-dark-600 rounded-lg
+                         text-sm text-white focus:outline-none focus:border-primary-500
+                         disabled:opacity-50"
+            >
+              <option value="">Default (Assembly)</option>
+              
+              {modelFiles.files.sim.length > 0 && (
+                <optgroup label="Simulation (.sim)">
+                  {modelFiles.files.sim.map(f => (
+                    <option key={f.name} value={f.name}>
+                      {f.stem} ({f.size_kb > 1000 ? `${(f.size_kb/1024).toFixed(1)}MB` : `${f.size_kb}KB`})
+                    </option>
+                  ))}
+                </optgroup>
+              )}
+              
+              {modelFiles.files.afm.length > 0 && (
+                <optgroup label="Assembly FEM (.afm)">
+                  {modelFiles.files.afm.map(f => (
+                    <option key={f.name} value={f.name}>
+                      {f.stem} ({f.size_kb > 1000 ? `${(f.size_kb/1024).toFixed(1)}MB` : `${f.size_kb}KB`})
+                    </option>
+                  ))}
+                </optgroup>
+              )}
+              
+              {modelFiles.files.fem.length > 0 && (
+                <optgroup label="FEM (.fem)">
+                  {modelFiles.files.fem.map(f => (
+                    <option key={f.name} value={f.name}>
+                      {f.stem} ({f.size_kb > 1000 ? `${(f.size_kb/1024).toFixed(1)}MB` : `${f.size_kb}KB`})
+                    </option>
+                  ))}
+                </optgroup>
+              )}
+              
+              {modelFiles.files.prt.length > 0 && (
+                <optgroup label="Geometry (.prt)">
+                  {modelFiles.files.prt.map(f => (
+                    <option key={f.name} value={f.name}>
+                      {f.stem} ({f.size_kb > 1000 ? `${(f.size_kb/1024).toFixed(1)}MB` : `${f.size_kb}KB`})
+                    </option>
+                  ))}
+                </optgroup>
+              )}
+              
+              {modelFiles.files.idealized.length > 0 && (
+                <optgroup label="Idealized (_i.prt)">
+                  {modelFiles.files.idealized.map(f => (
+                    <option key={f.name} value={f.name}>
+                      {f.stem} ({f.size_kb > 1000 ? `${(f.size_kb/1024).toFixed(1)}MB` : `${f.size_kb}KB`})
+                    </option>
+                  ))}
+                </optgroup>
+              )}
+            </select>
+            {isLoadingFiles && (
+              <RefreshCw size={12} className="animate-spin text-dark-400" />
+            )}
+          </div>
+        )}
+        
+        <input
+          type="text"
+          placeholder="Filter expressions..."
+          value={searchTerm}
+          onChange={(e) => setSearchTerm(e.target.value)}
+          className="w-full px-3 py-1.5 bg-dark-800 border border-dark-600 rounded-lg
+                     text-sm text-white placeholder-dark-500 focus:outline-none focus:border-primary-500"
+        />
+      </div>
+
+      {/* Content */}
+      <div className="flex-1 overflow-auto">
+        {isLoading ? (
+          <div className="flex items-center justify-center h-32 text-dark-500">
+            <RefreshCw size={20} className="animate-spin mr-2" />
+            Analyzing model...
+          </div>
+        ) : error ? (
+          <div className="p-4 text-red-400 text-sm">{error}</div>
+        ) : result ? (
+          <div className="p-2 space-y-2">
+            {/* Solver Type */}
+            {result.solver_type && (
+              <div className="p-2 bg-dark-800 rounded-lg">
+                <div className="flex items-center gap-2 text-sm">
+                  <Cpu size={14} className="text-violet-400" />
+                  <span className="text-dark-300">Solver:</span>
+                  <span className="text-white font-medium">{result.solver_type as string}</span>
+                </div>
+              </div>
+            )}
+
+            {/* Expressions Section */}
+            <div className="border border-dark-700 rounded-lg overflow-hidden">
+              <button
+                onClick={() => toggleSection('expressions')}
+                className="w-full flex items-center justify-between px-3 py-2 bg-dark-800 hover:bg-dark-750 transition-colors"
+              >
+                <div className="flex items-center gap-2">
+                  <SlidersHorizontal size={14} className="text-emerald-400" />
+                  <span className="text-sm font-medium text-white">
+                    Expressions ({filteredExpressions.length})
+                  </span>
+                </div>
+                {expandedSections.has('expressions') ? (
+                  <ChevronDown size={14} className="text-dark-400" />
+                ) : (
+                  <ChevronRight size={14} className="text-dark-400" />
+                )}
+              </button>
+
+              {expandedSections.has('expressions') && (
+                <div className="p-2 space-y-1 max-h-48 overflow-y-auto">
+                  {filteredExpressions.length === 0 ? (
+                    <p className="text-xs text-dark-500 text-center py-2">
+                      No expressions found
+                    </p>
+                  ) : (
+                    filteredExpressions.map((expr) => (
+                      <div
+                        key={expr.name}
+                        className="flex items-center justify-between p-2 bg-dark-850 rounded hover:bg-dark-750 group transition-colors"
+                      >
+                        <div className="flex-1 min-w-0">
+                          <p className="text-sm text-white truncate">{expr.name}</p>
+                          <p className="text-xs text-dark-500">
+                            {expr.value} {expr.units || expr.unit || ''}
+                            {expr.source === 'inferred' && (
+                              <span className="ml-1 text-amber-500">(inferred)</span>
+                            )}
+                          </p>
+                        </div>
+                        <button
+                          onClick={() => addExpressionAsDesignVar(expr)}
+                          className="p-1.5 text-dark-500 hover:text-primary-400 hover:bg-dark-700 rounded
+                                     opacity-0 group-hover:opacity-100 transition-all"
+                          title="Add as Design Variable"
+                        >
+                          <Plus size={14} />
+                        </button>
+                      </div>
+                    ))
+                  )}
+                </div>
+              )}
+            </div>
+
+            {/* Mass Properties Section */}
+            {result.mass_properties && (
+              <div className="border border-dark-700 rounded-lg overflow-hidden">
+                <button
+                  onClick={() => toggleSection('mass')}
+                  className="w-full flex items-center justify-between px-3 py-2 bg-dark-800 hover:bg-dark-750 transition-colors"
+                >
+                  <div className="flex items-center gap-2">
+                    <Scale size={14} className="text-blue-400" />
+                    <span className="text-sm font-medium text-white">Mass Properties</span>
+                  </div>
+                  {expandedSections.has('mass') ? (
+                    <ChevronDown size={14} className="text-dark-400" />
+                  ) : (
+                    <ChevronRight size={14} className="text-dark-400" />
+                  )}
+                </button>
+
+                {expandedSections.has('mass') && (
+                  <div className="p-2 space-y-1">
+                    {(result.mass_properties as Record<string, unknown>).mass_kg !== undefined && (
+                      <div className="flex justify-between p-2 bg-dark-850 rounded text-xs">
+                        <span className="text-dark-400">Mass</span>
+                        <span className="text-white font-mono">
+                          {((result.mass_properties as Record<string, unknown>).mass_kg as number).toFixed(4)} kg
+                        </span>
+                      </div>
+                    )}
+                  </div>
+                )}
+              </div>
+            )}
+
+            {/* More sections can be added here following the same pattern as the original IntrospectionPanel */}
+          </div>
+        ) : (
+          <div className="p-4 text-center text-dark-500 text-sm">
+            Click refresh to analyze the model
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
+
+export default FloatingIntrospectionPanel;

atomizer-dashboard/frontend/src/components/canvas/panels/NodeConfigPanelV2.tsx

@@ -17,8 +17,8 @@ import {
   useSelectedNodeId,
   useSelectedNode,
 } from '../../../hooks/useSpecStore';
+import { usePanelStore } from '../../../hooks/usePanelStore';
 import { FileBrowser } from './FileBrowser';
-import { IntrospectionPanel } from './IntrospectionPanel';
 import {
   DesignVariable,
   Extractor,
@@ -43,7 +43,6 @@ export function NodeConfigPanelV2({ onClose }: NodeConfigPanelV2Props) {
   const { updateNode, removeNode, clearSelection } = useSpecStore();
   
   const [showFileBrowser, setShowFileBrowser] = useState(false);
-  const [showIntrospection, setShowIntrospection] = useState(false);
   const [isUpdating, setIsUpdating] = useState(false);
   const [error, setError] = useState<string | null>(null);
 
@@ -249,15 +248,7 @@ export function NodeConfigPanelV2({ onClose }: NodeConfigPanelV2Props) {
         fileTypes={['.sim', '.prt', '.fem', '.afem']}
       />
 
-      {/* Introspection Panel */}
-      {showIntrospection && spec.model.sim?.path && (
-        <div className="fixed top-20 right-96 z-40">
-          <IntrospectionPanel
-            filePath={spec.model.sim.path}
-            onClose={() => setShowIntrospection(false)}
-          />
-        </div>
-      )}
+      {/* Introspection is now handled by FloatingIntrospectionPanel via usePanelStore */}
     </div>
   );
 }
@@ -271,7 +262,16 @@ interface SpecConfigProps {
 }
 
 function ModelNodeConfig({ spec }: SpecConfigProps) {
-  const [showIntrospection, setShowIntrospection] = useState(false);
+  const { setIntrospectionData, openPanel } = usePanelStore();
+  
+  const handleOpenIntrospection = () => {
+    // Set up introspection data and open the panel
+    setIntrospectionData({
+      filePath: spec.model.sim?.path || '',
+      studyId: useSpecStore.getState().studyId || undefined,
+    });
+    openPanel('introspection');
+  };
   
   return (
     <>
@@ -299,7 +299,7 @@ function ModelNodeConfig({ spec }: SpecConfigProps) {
 
       {spec.model.sim?.path && (
         <button
-          onClick={() => setShowIntrospection(true)}
+          onClick={handleOpenIntrospection}
           className="w-full flex items-center justify-center gap-2 px-3 py-2.5 bg-primary-500/20
                      hover:bg-primary-500/30 border border-primary-500/30 rounded-lg
                      text-primary-400 text-sm font-medium transition-colors"
@@ -309,31 +309,112 @@ function ModelNodeConfig({ spec }: SpecConfigProps) {
         </button>
       )}
       
-      {showIntrospection && spec.model.sim?.path && (
-        <div className="fixed top-20 right-96 z-40">
-          <IntrospectionPanel
-            filePath={spec.model.sim.path}
-            onClose={() => setShowIntrospection(false)}
-          />
-        </div>
-      )}
+      {/* Note: IntrospectionPanel is now rendered by PanelContainer, not here */}
     </>
   );
 }
 
 function SolverNodeConfig({ spec }: SpecConfigProps) {
+  const { patchSpec } = useSpecStore();
+  const [isUpdating, setIsUpdating] = useState(false);
+  
+  const engine = spec.model.sim?.engine || 'nxnastran';
+  const solutionType = spec.model.sim?.solution_type || 'SOL101';
+  const scriptPath = spec.model.sim?.script_path || '';
+  const isPython = engine === 'python';
+  
+  const handleEngineChange = async (newEngine: string) => {
+    setIsUpdating(true);
+    try {
+      await patchSpec('model.sim.engine', newEngine);
+    } catch (err) {
+      console.error('Failed to update engine:', err);
+    } finally {
+      setIsUpdating(false);
+    }
+  };
+  
+  const handleSolutionTypeChange = async (newType: string) => {
+    setIsUpdating(true);
+    try {
+      await patchSpec('model.sim.solution_type', newType);
+    } catch (err) {
+      console.error('Failed to update solution type:', err);
+    } finally {
+      setIsUpdating(false);
+    }
+  };
+  
+  const handleScriptPathChange = async (newPath: string) => {
+    setIsUpdating(true);
+    try {
+      await patchSpec('model.sim.script_path', newPath);
+    } catch (err) {
+      console.error('Failed to update script path:', err);
+    } finally {
+      setIsUpdating(false);
+    }
+  };
+
   return (
-    <div>
-      <label className={labelClass}>Solution Type</label>
-      <input
-        type="text"
-        value={spec.model.sim?.solution_type || 'Not configured'}
-        readOnly
-        className={`${inputClass} bg-dark-900 cursor-not-allowed`}
-        title="Solver type is determined by the model file."
-      />
-      <p className="text-xs text-dark-500 mt-1">Detected from model file.</p>
-    </div>
+    <>
+      {isUpdating && (
+        <div className="text-xs text-primary-400 animate-pulse">Updating...</div>
+      )}
+      
+      <div>
+        <label className={labelClass}>Solver Engine</label>
+        <select
+          value={engine}
+          onChange={(e) => handleEngineChange(e.target.value)}
+          className={selectClass}
+        >
+          <option value="nxnastran">NX Nastran (built-in)</option>
+          <option value="mscnastran">MSC Nastran (external)</option>
+          <option value="python">Python Script</option>
+          <option value="abaqus" disabled>Abaqus (coming soon)</option>
+          <option value="ansys" disabled>ANSYS (coming soon)</option>
+        </select>
+        <p className="text-xs text-dark-500 mt-1">
+          {isPython ? 'Run custom Python analysis script' : 'Select FEA solver software'}
+        </p>
+      </div>
+      
+      {!isPython && (
+        <div>
+          <label className={labelClass}>Solution Type</label>
+          <select
+            value={solutionType}
+            onChange={(e) => handleSolutionTypeChange(e.target.value)}
+            className={selectClass}
+          >
+            <option value="SOL101">SOL101 - Linear Statics</option>
+            <option value="SOL103">SOL103 - Normal Modes</option>
+            <option value="SOL105">SOL105 - Buckling</option>
+            <option value="SOL106">SOL106 - Nonlinear Statics</option>
+            <option value="SOL111">SOL111 - Modal Frequency Response</option>
+            <option value="SOL112">SOL112 - Modal Transient Response</option>
+            <option value="SOL200">SOL200 - Design Optimization</option>
+          </select>
+        </div>
+      )}
+      
+      {isPython && (
+        <div>
+          <label className={labelClass}>Script Path</label>
+          <input
+            type="text"
+            value={scriptPath}
+            onChange={(e) => handleScriptPathChange(e.target.value)}
+            placeholder="path/to/solver_script.py"
+            className={`${inputClass} font-mono text-sm`}
+          />
+          <p className="text-xs text-dark-500 mt-1">
+            Python script must define solve(params) function
+          </p>
+        </div>
+      )}
+    </>
   );
 }
 
@@ -694,38 +775,21 @@ function ExtractorNodeConfig({ node, onChange }: ExtractorNodeConfigProps) {
       {showCodeEditor && (
         <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm">
           <div className="w-[900px] h-[700px] bg-dark-850 rounded-xl overflow-hidden shadow-2xl border border-dark-600 flex flex-col">
-            {/* Modal Header */}
-            <div className="flex items-center justify-between px-4 py-3 border-b border-dark-700 bg-dark-900">
-              <div className="flex items-center gap-3">
-                <FileCode size={18} className="text-violet-400" />
-                <span className="font-medium text-white">Custom Extractor: {node.name}</span>
-                <span className="text-xs text-dark-500 bg-dark-800 px-2 py-0.5 rounded">.py</span>
-              </div>
-              <button
-                onClick={() => setShowCodeEditor(false)}
-                className="p-1.5 rounded hover:bg-dark-700 text-dark-400 hover:text-white transition-colors"
-              >
-                <X size={18} />
-              </button>
-            </div>
-            
-            {/* Code Editor */}
-            <div className="flex-1">
-              <CodeEditorPanel
-                initialCode={currentCode}
-                extractorName={node.name}
-                outputs={node.outputs?.map(o => o.name) || []}
-                onChange={handleCodeChange}
-                onRequestGeneration={handleRequestGeneration}
-                onRequestStreamingGeneration={handleStreamingGeneration}
-                onRun={handleValidateCode}
-                onTest={handleTestCode}
-                onClose={() => setShowCodeEditor(false)}
-                showHeader={false}
-                height="100%"
-                studyId={studyId || undefined}
-              />
-            </div>
+            {/* Code Editor with built-in header containing toolbar buttons */}
+            <CodeEditorPanel
+              initialCode={currentCode}
+              extractorName={`Custom Extractor: ${node.name}`}
+              outputs={node.outputs?.map(o => o.name) || []}
+              onChange={handleCodeChange}
+              onRequestGeneration={handleRequestGeneration}
+              onRequestStreamingGeneration={handleStreamingGeneration}
+              onRun={handleValidateCode}
+              onTest={handleTestCode}
+              onClose={() => setShowCodeEditor(false)}
+              showHeader={true}
+              height="100%"
+              studyId={studyId || undefined}
+            />
           </div>
         </div>
       )}
@@ -756,6 +820,34 @@ interface ObjectiveNodeConfigProps {
 }
 
 function ObjectiveNodeConfig({ node, onChange }: ObjectiveNodeConfigProps) {
+  const spec = useSpec();
+  const extractors = spec?.extractors || [];
+
+  const currentExtractorId = node.source?.extractor_id || '__UNSET__';
+  const currentOutputName = node.source?.output_name || '__UNSET__';
+
+  const selectedExtractor = extractors.find((e) => e.id === currentExtractorId);
+  const outputOptions = selectedExtractor?.outputs?.map((o) => o.name) || [];
+
+  const handleExtractorChange = (extractorId: string) => {
+    // Reset output_name to a sensible default when extractor changes
+    const ext = extractors.find((e) => e.id === extractorId);
+    const outs = ext?.outputs?.map((o) => o.name) || [];
+    const preferred = outs.includes('value') ? 'value' : outs[0] || '__UNSET__';
+
+    onChange('source', {
+      extractor_id: extractorId,
+      output_name: preferred,
+    });
+  };
+
+  const handleOutputChange = (outputName: string) => {
+    onChange('source', {
+      extractor_id: currentExtractorId,
+      output_name: outputName,
+    });
+  };
+
   return (
     <>
       <div>
@@ -768,6 +860,45 @@ function ObjectiveNodeConfig({ node, onChange }: ObjectiveNodeConfigProps) {
         />
       </div>
 
+      <div>
+        <label className={labelClass}>Source Extractor</label>
+        <select
+          value={currentExtractorId}
+          onChange={(e) => handleExtractorChange(e.target.value)}
+          className={selectClass}
+        >
+          <option value="__UNSET__">(not connected)</option>
+          {extractors.map((ext) => (
+            <option key={ext.id} value={ext.id}>
+              {ext.id} — {ext.name}
+            </option>
+          ))}
+        </select>
+      </div>
+
+      <div>
+        <label className={labelClass}>Source Output</label>
+        <select
+          value={currentOutputName}
+          onChange={(e) => handleOutputChange(e.target.value)}
+          className={selectClass}
+          disabled={currentExtractorId === '__UNSET__'}
+        >
+          {currentExtractorId === '__UNSET__' ? (
+            <option value="__UNSET__">(select an extractor)</option>
+          ) : (
+            outputOptions.map((name) => (
+              <option key={name} value={name}>
+                {name}
+              </option>
+            ))
+          )}
+        </select>
+        <p className="text-xs text-dark-500 mt-1">
+          This drives execution. Canvas wires are just a visual check.
+        </p>
+      </div>
+      
       <div>
         <label className={labelClass}>Direction</label>
         <select
@@ -813,6 +944,33 @@ interface ConstraintNodeConfigProps {
 }
 
 function ConstraintNodeConfig({ node, onChange }: ConstraintNodeConfigProps) {
+  const spec = useSpec();
+  const extractors = spec?.extractors || [];
+
+  const currentExtractorId = node.source?.extractor_id || '__UNSET__';
+  const currentOutputName = node.source?.output_name || '__UNSET__';
+
+  const selectedExtractor = extractors.find((e) => e.id === currentExtractorId);
+  const outputOptions = selectedExtractor?.outputs?.map((o) => o.name) || [];
+
+  const handleExtractorChange = (extractorId: string) => {
+    const ext = extractors.find((e) => e.id === extractorId);
+    const outs = ext?.outputs?.map((o) => o.name) || [];
+    const preferred = outs.includes('value') ? 'value' : outs[0] || '__UNSET__';
+
+    onChange('source', {
+      extractor_id: extractorId,
+      output_name: preferred,
+    });
+  };
+
+  const handleOutputChange = (outputName: string) => {
+    onChange('source', {
+      extractor_id: currentExtractorId,
+      output_name: outputName,
+    });
+  };
+
   return (
     <>
       <div>
@@ -825,6 +983,45 @@ function ConstraintNodeConfig({ node, onChange }: ConstraintNodeConfigProps) {
         />
       </div>
 
+      <div>
+        <label className={labelClass}>Source Extractor</label>
+        <select
+          value={currentExtractorId}
+          onChange={(e) => handleExtractorChange(e.target.value)}
+          className={selectClass}
+        >
+          <option value="__UNSET__">(not connected)</option>
+          {extractors.map((ext) => (
+            <option key={ext.id} value={ext.id}>
+              {ext.id} — {ext.name}
+            </option>
+          ))}
+        </select>
+      </div>
+
+      <div>
+        <label className={labelClass}>Source Output</label>
+        <select
+          value={currentOutputName}
+          onChange={(e) => handleOutputChange(e.target.value)}
+          className={selectClass}
+          disabled={currentExtractorId === '__UNSET__'}
+        >
+          {currentExtractorId === '__UNSET__' ? (
+            <option value="__UNSET__">(select an extractor)</option>
+          ) : (
+            outputOptions.map((name) => (
+              <option key={name} value={name}>
+                {name}
+              </option>
+            ))
+          )}
+        </select>
+        <p className="text-xs text-dark-500 mt-1">
+          This drives execution. Canvas wires are just a visual check.
+        </p>
+      </div>
+      
       <div className="grid grid-cols-2 gap-2">
         <div>
           <label className={labelClass}>Type</label>
@@ -833,24 +1030,37 @@ function ConstraintNodeConfig({ node, onChange }: ConstraintNodeConfigProps) {
             onChange={(e) => onChange('type', e.target.value)}
             className={selectClass}
           >
-            <option value="less_than">&lt; Less than</option>
-            <option value="less_equal">&lt;= Less or equal</option>
-            <option value="greater_than">&gt; Greater than</option>
-            <option value="greater_equal">&gt;= Greater or equal</option>
-            <option value="equal">= Equal</option>
+            <option value="hard">Hard</option>
+            <option value="soft">Soft</option>
           </select>
+          <p className="text-xs text-dark-500 mt-1">Spec type (hard/soft). Operator is set below.</p>
         </div>
         <div>
-          <label className={labelClass}>Threshold</label>
-          <input
-            type="number"
-            value={node.threshold}
-            onChange={(e) => onChange('threshold', parseFloat(e.target.value))}
-            className={inputClass}
-          />
+          <label className={labelClass}>Operator</label>
+          <select
+            value={node.operator}
+            onChange={(e) => onChange('operator', e.target.value)}
+            className={selectClass}
+          >
+            <option value="<=">&lt;=</option>
+            <option value="<">&lt;</option>
+            <option value=">=">&gt;=</option>
+            <option value=">">&gt;</option>
+            <option value="==">==</option>
+          </select>
         </div>
       </div>
 
+      <div>
+        <label className={labelClass}>Threshold</label>
+        <input
+          type="number"
+          value={node.threshold}
+          onChange={(e) => onChange('threshold', parseFloat(e.target.value))}
+          className={inputClass}
+        />
+      </div>
+
     </>
   );
 }

atomizer-dashboard/frontend/src/components/canvas/panels/PanelContainer.tsx

@@ -0,0 +1,207 @@
+/**
+ * PanelContainer - Orchestrates all floating panels in the canvas view
+ * 
+ * This component renders floating panels (Introspection, Validation, Error, Results)
+ * in a portal, positioned absolutely within the canvas area.
+ * 
+ * Features:
+ * - Draggable panels
+ * - Z-index management (click to bring to front)
+ * - Keyboard shortcuts (Escape to close all)
+ * - Position persistence via usePanelStore
+ */
+
+import { useState, useCallback, useEffect, useRef } from 'react';
+import { createPortal } from 'react-dom';
+import {
+  usePanelStore,
+  useIntrospectionPanel,
+  useValidationPanel,
+  useErrorPanel,
+  useResultsPanel,
+  PanelPosition,
+} from '../../../hooks/usePanelStore';
+import { FloatingIntrospectionPanel } from './FloatingIntrospectionPanel';
+import { FloatingValidationPanel } from './ValidationPanel';
+import { ErrorPanel } from './ErrorPanel';
+import { ResultsPanel } from './ResultsPanel';
+
+interface PanelContainerProps {
+  /** Container element to render panels into (defaults to document.body) */
+  container?: HTMLElement;
+  /** Callback when retry is requested from error panel */
+  onRetry?: (trial?: number) => void;
+  /** Callback when skip trial is requested */
+  onSkipTrial?: (trial: number) => void;
+}
+
+type PanelName = 'introspection' | 'validation' | 'error' | 'results';
+
+export function PanelContainer({ container, onRetry, onSkipTrial }: PanelContainerProps) {
+  const { closePanel, setPanelPosition, closeAllPanels } = usePanelStore();
+  
+  const introspectionPanel = useIntrospectionPanel();
+  const validationPanel = useValidationPanel();
+  const errorPanel = useErrorPanel();
+  const resultsPanel = useResultsPanel();
+
+  // Track which panel is on top (for z-index)
+  const [topPanel, setTopPanel] = useState<PanelName | null>(null);
+  
+  // Dragging state
+  const [dragging, setDragging] = useState<{ panel: PanelName; offset: { x: number; y: number } } | null>(null);
+  const dragRef = useRef<{ panel: PanelName; offset: { x: number; y: number } } | null>(null);
+
+  // Escape key to close all panels
+  useEffect(() => {
+    const handleKeyDown = (e: KeyboardEvent) => {
+      if (e.key === 'Escape') {
+        closeAllPanels();
+      }
+    };
+    window.addEventListener('keydown', handleKeyDown);
+    return () => window.removeEventListener('keydown', handleKeyDown);
+  }, [closeAllPanels]);
+
+  // Mouse move handler for dragging
+  useEffect(() => {
+    const handleMouseMove = (e: MouseEvent) => {
+      if (!dragRef.current) return;
+      
+      const { panel, offset } = dragRef.current;
+      const newPosition: PanelPosition = {
+        x: e.clientX - offset.x,
+        y: e.clientY - offset.y,
+      };
+      
+      // Clamp to viewport
+      newPosition.x = Math.max(0, Math.min(window.innerWidth - 100, newPosition.x));
+      newPosition.y = Math.max(0, Math.min(window.innerHeight - 50, newPosition.y));
+      
+      setPanelPosition(panel, newPosition);
+    };
+
+    const handleMouseUp = () => {
+      dragRef.current = null;
+      setDragging(null);
+    };
+
+    if (dragging) {
+      window.addEventListener('mousemove', handleMouseMove);
+      window.addEventListener('mouseup', handleMouseUp);
+    }
+
+    return () => {
+      window.removeEventListener('mousemove', handleMouseMove);
+      window.removeEventListener('mouseup', handleMouseUp);
+    };
+  }, [dragging, setPanelPosition]);
+
+  // Start dragging a panel
+  const handleDragStart = useCallback((panel: PanelName, e: React.MouseEvent, position: PanelPosition) => {
+    const offset = {
+      x: e.clientX - position.x,
+      y: e.clientY - position.y,
+    };
+    dragRef.current = { panel, offset };
+    setDragging({ panel, offset });
+    setTopPanel(panel);
+  }, []);
+
+  // Click to bring panel to front
+  const handlePanelClick = useCallback((panel: PanelName) => {
+    setTopPanel(panel);
+  }, []);
+
+  // Get z-index for a panel
+  const getZIndex = (panel: PanelName) => {
+    const baseZ = 100;
+    if (panel === topPanel) return baseZ + 10;
+    return baseZ;
+  };
+
+  // Render a draggable wrapper
+  const renderDraggable = (
+    panel: PanelName,
+    position: PanelPosition,
+    isOpen: boolean,
+    children: React.ReactNode
+  ) => {
+    if (!isOpen) return null;
+
+    return (
+      <div
+        key={panel}
+        className="fixed select-none"
+        style={{
+          left: position.x,
+          top: position.y,
+          zIndex: getZIndex(panel),
+          cursor: dragging?.panel === panel ? 'grabbing' : 'default',
+        }}
+        onClick={() => handlePanelClick(panel)}
+      >
+        {/* Drag handle - the header area */}
+        <div
+          className="absolute top-0 left-0 right-0 h-12 cursor-grab active:cursor-grabbing"
+          onMouseDown={(e) => handleDragStart(panel, e, position)}
+          style={{ zIndex: 1 }}
+        />
+        {/* Panel content */}
+        <div className="relative" style={{ zIndex: 0 }}>
+          {children}
+        </div>
+      </div>
+    );
+  };
+
+  // Determine what to render
+  const panels = (
+    <>
+      {/* Introspection Panel */}
+      {renderDraggable(
+        'introspection',
+        introspectionPanel.position || { x: 100, y: 100 },
+        introspectionPanel.open,
+        <FloatingIntrospectionPanel onClose={() => closePanel('introspection')} />
+      )}
+
+      {/* Validation Panel */}
+      {renderDraggable(
+        'validation',
+        validationPanel.position || { x: 150, y: 150 },
+        validationPanel.open,
+        <FloatingValidationPanel onClose={() => closePanel('validation')} />
+      )}
+
+      {/* Error Panel */}
+      {renderDraggable(
+        'error',
+        errorPanel.position || { x: 200, y: 100 },
+        errorPanel.open,
+        <ErrorPanel 
+          onClose={() => closePanel('error')} 
+          onRetry={onRetry}
+          onSkipTrial={onSkipTrial}
+        />
+      )}
+
+      {/* Results Panel */}
+      {renderDraggable(
+        'results',
+        resultsPanel.position || { x: 250, y: 150 },
+        resultsPanel.open,
+        <ResultsPanel onClose={() => closePanel('results')} />
+      )}
+    </>
+  );
+
+  // Use portal if container specified, otherwise render in place
+  if (container) {
+    return createPortal(panels, container);
+  }
+
+  return panels;
+}
+
+export default PanelContainer;

atomizer-dashboard/frontend/src/components/canvas/panels/ResultsPanel.tsx

@@ -0,0 +1,179 @@
+/**
+ * ResultsPanel - Shows detailed trial results
+ * 
+ * Displays the parameters, objectives, and constraints for a specific trial.
+ * Can be opened by clicking on result badges on nodes.
+ */
+
+import {
+  X,
+  Minimize2,
+  Maximize2,
+  CheckCircle,
+  XCircle,
+  Trophy,
+  SlidersHorizontal,
+  Target,
+  AlertTriangle,
+  Clock,
+} from 'lucide-react';
+import { useResultsPanel, usePanelStore } from '../../../hooks/usePanelStore';
+
+interface ResultsPanelProps {
+  onClose: () => void;
+}
+
+export function ResultsPanel({ onClose }: ResultsPanelProps) {
+  const panel = useResultsPanel();
+  const { minimizePanel } = usePanelStore();
+  const data = panel.data;
+
+  if (!panel.open || !data) return null;
+
+  const timestamp = new Date(data.timestamp).toLocaleTimeString();
+
+  // Minimized view
+  if (panel.minimized) {
+    return (
+      <div 
+        className="bg-dark-850 border border-dark-700 rounded-lg shadow-xl flex items-center gap-2 px-3 py-2 cursor-pointer hover:bg-dark-800 transition-colors"
+        onClick={() => minimizePanel('results')}
+      >
+        <Trophy size={16} className={data.isBest ? 'text-amber-400' : 'text-dark-400'} />
+        <span className="text-sm text-white font-medium">
+          Trial #{data.trialNumber}
+        </span>
+        <Maximize2 size={14} className="text-dark-400" />
+      </div>
+    );
+  }
+
+  return (
+    <div className="bg-dark-850 border border-dark-700 rounded-xl w-80 max-h-[500px] flex flex-col shadow-xl">
+      {/* Header */}
+      <div className="flex items-center justify-between px-4 py-3 border-b border-dark-700">
+        <div className="flex items-center gap-2">
+          <Trophy size={18} className={data.isBest ? 'text-amber-400' : 'text-dark-400'} />
+          <span className="font-medium text-white">
+            Trial #{data.trialNumber}
+          </span>
+          {data.isBest && (
+            <span className="px-1.5 py-0.5 text-xs bg-amber-500/20 text-amber-400 rounded">
+              Best
+            </span>
+          )}
+        </div>
+        <div className="flex items-center gap-1">
+          <button
+            onClick={() => minimizePanel('results')}
+            className="p-1.5 text-dark-400 hover:text-white hover:bg-dark-700 rounded transition-colors"
+            title="Minimize"
+          >
+            <Minimize2 size={14} />
+          </button>
+          <button
+            onClick={onClose}
+            className="p-1.5 text-dark-400 hover:text-white hover:bg-dark-700 rounded transition-colors"
+          >
+            <X size={14} />
+          </button>
+        </div>
+      </div>
+
+      {/* Content */}
+      <div className="flex-1 overflow-y-auto p-3 space-y-4">
+        {/* Status */}
+        <div className="flex items-center gap-3">
+          {data.isFeasible ? (
+            <div className="flex items-center gap-1.5 text-green-400">
+              <CheckCircle size={16} />
+              <span className="text-sm font-medium">Feasible</span>
+            </div>
+          ) : (
+            <div className="flex items-center gap-1.5 text-red-400">
+              <XCircle size={16} />
+              <span className="text-sm font-medium">Infeasible</span>
+            </div>
+          )}
+          <div className="flex items-center gap-1.5 text-dark-400 ml-auto">
+            <Clock size={14} />
+            <span className="text-xs">{timestamp}</span>
+          </div>
+        </div>
+
+        {/* Parameters */}
+        <div>
+          <h4 className="text-xs font-medium text-dark-400 uppercase tracking-wide mb-2 flex items-center gap-1.5">
+            <SlidersHorizontal size={12} />
+            Parameters
+          </h4>
+          <div className="space-y-1">
+            {Object.entries(data.params).map(([name, value]) => (
+              <div key={name} className="flex justify-between p-2 bg-dark-800 rounded text-sm">
+                <span className="text-dark-300">{name}</span>
+                <span className="text-white font-mono">{formatValue(value)}</span>
+              </div>
+            ))}
+          </div>
+        </div>
+
+        {/* Objectives */}
+        <div>
+          <h4 className="text-xs font-medium text-dark-400 uppercase tracking-wide mb-2 flex items-center gap-1.5">
+            <Target size={12} />
+            Objectives
+          </h4>
+          <div className="space-y-1">
+            {Object.entries(data.objectives).map(([name, value]) => (
+              <div key={name} className="flex justify-between p-2 bg-dark-800 rounded text-sm">
+                <span className="text-dark-300">{name}</span>
+                <span className="text-primary-400 font-mono">{formatValue(value)}</span>
+              </div>
+            ))}
+          </div>
+        </div>
+
+        {/* Constraints (if any) */}
+        {data.constraints && Object.keys(data.constraints).length > 0 && (
+          <div>
+            <h4 className="text-xs font-medium text-dark-400 uppercase tracking-wide mb-2 flex items-center gap-1.5">
+              <AlertTriangle size={12} />
+              Constraints
+            </h4>
+            <div className="space-y-1">
+              {Object.entries(data.constraints).map(([name, constraint]) => (
+                <div 
+                  key={name} 
+                  className={`flex justify-between p-2 rounded text-sm ${
+                    constraint.feasible ? 'bg-dark-800' : 'bg-red-500/10 border border-red-500/20'
+                  }`}
+                >
+                  <span className="text-dark-300 flex items-center gap-1.5">
+                    {constraint.feasible ? (
+                      <CheckCircle size={12} className="text-green-400" />
+                    ) : (
+                      <XCircle size={12} className="text-red-400" />
+                    )}
+                    {name}
+                  </span>
+                  <span className={`font-mono ${constraint.feasible ? 'text-white' : 'text-red-400'}`}>
+                    {formatValue(constraint.value)}
+                  </span>
+                </div>
+              ))}
+            </div>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
+
+function formatValue(value: number): string {
+  if (Math.abs(value) < 0.001 || Math.abs(value) >= 10000) {
+    return value.toExponential(3);
+  }
+  return value.toFixed(4).replace(/\.?0+$/, '');
+}
+
+export default ResultsPanel;

atomizer-dashboard/frontend/src/components/canvas/panels/ValidationPanel.tsx

@@ -1,10 +1,41 @@
+/**
+ * ValidationPanel - Displays spec validation errors and warnings
+ * 
+ * Shows a list of validation issues that need to be fixed before
+ * running an optimization. Supports auto-navigation to problematic nodes.
+ * 
+ * Can be used in two modes:
+ * 1. Legacy mode: Pass validation prop directly (for backward compatibility)
+ * 2. Store mode: Uses usePanelStore for persistent state
+ */
+
+import { useMemo } from 'react';
+import {
+  X,
+  AlertCircle,
+  AlertTriangle,
+  CheckCircle,
+  ChevronRight,
+  Minimize2,
+  Maximize2,
+} from 'lucide-react';
+import { useValidationPanel, usePanelStore, ValidationError as StoreValidationError } from '../../../hooks/usePanelStore';
+import { useSpecStore } from '../../../hooks/useSpecStore';
 import { ValidationResult } from '../../../lib/canvas/validation';
 
-interface ValidationPanelProps {
+// ============================================================================
+// Legacy Props Interface (for backward compatibility)
+// ============================================================================
+
+interface LegacyValidationPanelProps {
   validation: ValidationResult;
 }
 
-export function ValidationPanel({ validation }: ValidationPanelProps) {
+/**
+ * Legacy ValidationPanel - Inline display for canvas overlay
+ * Kept for backward compatibility with AtomizerCanvas
+ */
+export function ValidationPanel({ validation }: LegacyValidationPanelProps) {
   return (
     <div className="absolute top-4 left-1/2 transform -translate-x-1/2 max-w-md w-full z-10">
       {validation.errors.length > 0 && (
@@ -30,3 +61,199 @@ export function ValidationPanel({ validation }: ValidationPanelProps) {
     </div>
   );
 }
+
+// ============================================================================
+// New Floating Panel (uses store)
+// ============================================================================
+
+interface FloatingValidationPanelProps {
+  onClose: () => void;
+}
+
+export function FloatingValidationPanel({ onClose }: FloatingValidationPanelProps) {
+  const panel = useValidationPanel();
+  const { minimizePanel } = usePanelStore();
+  const { selectNode } = useSpecStore();
+
+  const { errors, warnings, valid } = useMemo(() => {
+    if (!panel.data) {
+      return { errors: [], warnings: [], valid: true };
+    }
+    return {
+      errors: panel.data.errors || [],
+      warnings: panel.data.warnings || [],
+      valid: panel.data.valid,
+    };
+  }, [panel.data]);
+
+  const handleNavigateToNode = (nodeId?: string) => {
+    if (nodeId) {
+      selectNode(nodeId);
+    }
+  };
+
+  if (!panel.open) return null;
+
+  // Minimized view
+  if (panel.minimized) {
+    return (
+      <div 
+        className="bg-dark-850 border border-dark-700 rounded-lg shadow-xl flex items-center gap-2 px-3 py-2 cursor-pointer hover:bg-dark-800 transition-colors"
+        onClick={() => minimizePanel('validation')}
+      >
+        {valid ? (
+          <CheckCircle size={16} className="text-green-400" />
+        ) : (
+          <AlertCircle size={16} className="text-red-400" />
+        )}
+        <span className="text-sm text-white font-medium">
+          Validation {valid ? 'Passed' : `(${errors.length} errors)`}
+        </span>
+        <Maximize2 size={14} className="text-dark-400" />
+      </div>
+    );
+  }
+
+  return (
+    <div className="bg-dark-850 border border-dark-700 rounded-xl w-96 max-h-[500px] flex flex-col shadow-xl">
+      {/* Header */}
+      <div className="flex items-center justify-between px-4 py-3 border-b border-dark-700">
+        <div className="flex items-center gap-2">
+          {valid ? (
+            <CheckCircle size={18} className="text-green-400" />
+          ) : (
+            <AlertCircle size={18} className="text-red-400" />
+          )}
+          <span className="font-medium text-white">
+            {valid ? 'Validation Passed' : 'Validation Issues'}
+          </span>
+        </div>
+        <div className="flex items-center gap-1">
+          <button
+            onClick={() => minimizePanel('validation')}
+            className="p-1.5 text-dark-400 hover:text-white hover:bg-dark-700 rounded transition-colors"
+            title="Minimize"
+          >
+            <Minimize2 size={14} />
+          </button>
+          <button
+            onClick={onClose}
+            className="p-1.5 text-dark-400 hover:text-white hover:bg-dark-700 rounded transition-colors"
+          >
+            <X size={14} />
+          </button>
+        </div>
+      </div>
+
+      {/* Content */}
+      <div className="flex-1 overflow-y-auto p-3 space-y-2">
+        {valid && errors.length === 0 && warnings.length === 0 ? (
+          <div className="flex flex-col items-center justify-center py-8 text-center">
+            <CheckCircle size={40} className="text-green-400 mb-3" />
+            <p className="text-white font-medium">All checks passed!</p>
+            <p className="text-sm text-dark-400 mt-1">
+              Your spec is ready to run.
+            </p>
+          </div>
+        ) : (
+          <>
+            {/* Errors */}
+            {errors.length > 0 && (
+              <div className="space-y-2">
+                <h4 className="text-xs font-medium text-red-400 uppercase tracking-wide flex items-center gap-1">
+                  <AlertCircle size={12} />
+                  Errors ({errors.length})
+                </h4>
+                {errors.map((error, idx) => (
+                  <ValidationItem
+                    key={`error-${idx}`}
+                    item={error}
+                    severity="error"
+                    onNavigate={() => handleNavigateToNode(error.nodeId)}
+                  />
+                ))}
+              </div>
+            )}
+
+            {/* Warnings */}
+            {warnings.length > 0 && (
+              <div className="space-y-2 mt-4">
+                <h4 className="text-xs font-medium text-amber-400 uppercase tracking-wide flex items-center gap-1">
+                  <AlertTriangle size={12} />
+                  Warnings ({warnings.length})
+                </h4>
+                {warnings.map((warning, idx) => (
+                  <ValidationItem
+                    key={`warning-${idx}`}
+                    item={warning}
+                    severity="warning"
+                    onNavigate={() => handleNavigateToNode(warning.nodeId)}
+                  />
+                ))}
+              </div>
+            )}
+          </>
+        )}
+      </div>
+
+      {/* Footer */}
+      {!valid && (
+        <div className="px-4 py-3 border-t border-dark-700 bg-dark-800/50">
+          <p className="text-xs text-dark-400">
+            Fix all errors before running the optimization.
+            Warnings can be ignored but may cause issues.
+          </p>
+        </div>
+      )}
+    </div>
+  );
+}
+
+// ============================================================================
+// Validation Item Component
+// ============================================================================
+
+interface ValidationItemProps {
+  item: StoreValidationError;
+  severity: 'error' | 'warning';
+  onNavigate: () => void;
+}
+
+function ValidationItem({ item, severity, onNavigate }: ValidationItemProps) {
+  const isError = severity === 'error';
+  const bgColor = isError ? 'bg-red-500/10' : 'bg-amber-500/10';
+  const borderColor = isError ? 'border-red-500/30' : 'border-amber-500/30';
+  const iconColor = isError ? 'text-red-400' : 'text-amber-400';
+
+  return (
+    <div 
+      className={`p-3 rounded-lg border ${bgColor} ${borderColor} group cursor-pointer hover:bg-opacity-20 transition-colors`}
+      onClick={onNavigate}
+    >
+      <div className="flex items-start gap-2">
+        {isError ? (
+          <AlertCircle size={16} className={`${iconColor} flex-shrink-0 mt-0.5`} />
+        ) : (
+          <AlertTriangle size={16} className={`${iconColor} flex-shrink-0 mt-0.5`} />
+        )}
+        <div className="flex-1 min-w-0">
+          <p className="text-sm text-white">{item.message}</p>
+          {item.path && (
+            <p className="text-xs text-dark-400 mt-1 font-mono">{item.path}</p>
+          )}
+          {item.suggestion && (
+            <p className="text-xs text-dark-300 mt-2 italic">{item.suggestion}</p>
+          )}
+        </div>
+        {item.nodeId && (
+          <ChevronRight 
+            size={16} 
+            className="text-dark-500 group-hover:text-white transition-colors flex-shrink-0" 
+          />
+        )}
+      </div>
+    </div>
+  );
+}
+
+export default ValidationPanel;

atomizer-dashboard/frontend/src/components/canvas/visualization/ConvergenceSparkline.tsx

@@ -0,0 +1,240 @@
+/**
+ * ConvergenceSparkline - Tiny SVG chart showing optimization convergence
+ * 
+ * Displays the last N trial values as a mini line chart.
+ * Used on ObjectiveNode to show convergence trend.
+ */
+
+import { useMemo } from 'react';
+
+interface ConvergenceSparklineProps {
+  /** Array of values (most recent last) */
+  values: number[];
+  /** Width in pixels */
+  width?: number;
+  /** Height in pixels */
+  height?: number;
+  /** Line color */
+  color?: string;
+  /** Best value line color */
+  bestColor?: string;
+  /** Whether to show the best value line */
+  showBest?: boolean;
+  /** Direction: minimize shows lower as better, maximize shows higher as better */
+  direction?: 'minimize' | 'maximize';
+  /** Show dots at each point */
+  showDots?: boolean;
+  /** Number of points to display */
+  maxPoints?: number;
+}
+
+export function ConvergenceSparkline({
+  values,
+  width = 80,
+  height = 24,
+  color = '#60a5fa',
+  bestColor = '#34d399',
+  showBest = true,
+  direction = 'minimize',
+  showDots = false,
+  maxPoints = 20,
+}: ConvergenceSparklineProps) {
+  const { path, bestY, points } = useMemo(() => {
+    if (!values || values.length === 0) {
+      return { path: '', bestY: null, points: [], minVal: 0, maxVal: 1 };
+    }
+
+    // Take last N points
+    const data = values.slice(-maxPoints);
+    if (data.length === 0) {
+      return { path: '', bestY: null, points: [], minVal: 0, maxVal: 1 };
+    }
+
+    // Calculate bounds with padding
+    const minVal = Math.min(...data);
+    const maxVal = Math.max(...data);
+    const range = maxVal - minVal || 1;
+    const padding = range * 0.1;
+    const yMin = minVal - padding;
+    const yMax = maxVal + padding;
+    const yRange = yMax - yMin;
+
+    // Calculate best value
+    const bestVal = direction === 'minimize' ? Math.min(...data) : Math.max(...data);
+
+    // Map values to SVG coordinates
+    const xStep = width / Math.max(data.length - 1, 1);
+    const mapY = (v: number) => height - ((v - yMin) / yRange) * height;
+
+    // Build path
+    const points = data.map((v, i) => ({
+      x: i * xStep,
+      y: mapY(v),
+      value: v,
+    }));
+
+    const pathParts = points.map((p, i) => 
+      i === 0 ? `M ${p.x} ${p.y}` : `L ${p.x} ${p.y}`
+    );
+
+    return {
+      path: pathParts.join(' '),
+      bestY: mapY(bestVal),
+      points,
+      minVal,
+      maxVal,
+    };
+  }, [values, width, height, maxPoints, direction]);
+
+  if (!values || values.length === 0) {
+    return (
+      <div 
+        className="flex items-center justify-center text-dark-500 text-xs"
+        style={{ width, height }}
+      >
+        No data
+      </div>
+    );
+  }
+
+  return (
+    <svg 
+      width={width} 
+      height={height} 
+      className="overflow-visible"
+      viewBox={`0 0 ${width} ${height}`}
+    >
+      {/* Best value line */}
+      {showBest && bestY !== null && (
+        <line
+          x1={0}
+          y1={bestY}
+          x2={width}
+          y2={bestY}
+          stroke={bestColor}
+          strokeWidth={1}
+          strokeDasharray="2,2"
+          opacity={0.5}
+        />
+      )}
+
+      {/* Main line */}
+      <path
+        d={path}
+        fill="none"
+        stroke={color}
+        strokeWidth={1.5}
+        strokeLinecap="round"
+        strokeLinejoin="round"
+      />
+
+      {/* Gradient fill under the line */}
+      <defs>
+        <linearGradient id="sparkline-gradient" x1="0%" y1="0%" x2="0%" y2="100%">
+          <stop offset="0%" stopColor={color} stopOpacity={0.3} />
+          <stop offset="100%" stopColor={color} stopOpacity={0} />
+        </linearGradient>
+      </defs>
+      
+      {points.length > 1 && (
+        <path
+          d={`${path} L ${points[points.length - 1].x} ${height} L ${points[0].x} ${height} Z`}
+          fill="url(#sparkline-gradient)"
+        />
+      )}
+
+      {/* Dots at each point */}
+      {showDots && points.map((p, i) => (
+        <circle
+          key={i}
+          cx={p.x}
+          cy={p.y}
+          r={2}
+          fill={color}
+        />
+      ))}
+
+      {/* Last point highlight */}
+      {points.length > 0 && (
+        <circle
+          cx={points[points.length - 1].x}
+          cy={points[points.length - 1].y}
+          r={3}
+          fill={color}
+          stroke="white"
+          strokeWidth={1}
+        />
+      )}
+    </svg>
+  );
+}
+
+/**
+ * ProgressRing - Circular progress indicator
+ */
+interface ProgressRingProps {
+  /** Progress percentage (0-100) */
+  progress: number;
+  /** Size in pixels */
+  size?: number;
+  /** Stroke width */
+  strokeWidth?: number;
+  /** Progress color */
+  color?: string;
+  /** Background color */
+  bgColor?: string;
+  /** Show percentage text */
+  showText?: boolean;
+}
+
+export function ProgressRing({
+  progress,
+  size = 32,
+  strokeWidth = 3,
+  color = '#60a5fa',
+  bgColor = '#374151',
+  showText = true,
+}: ProgressRingProps) {
+  const radius = (size - strokeWidth) / 2;
+  const circumference = radius * 2 * Math.PI;
+  const offset = circumference - (Math.min(100, Math.max(0, progress)) / 100) * circumference;
+
+  return (
+    <div className="relative inline-flex items-center justify-center" style={{ width: size, height: size }}>
+      <svg width={size} height={size} className="transform -rotate-90">
+        {/* Background circle */}
+        <circle
+          cx={size / 2}
+          cy={size / 2}
+          r={radius}
+          fill="none"
+          stroke={bgColor}
+          strokeWidth={strokeWidth}
+        />
+        {/* Progress circle */}
+        <circle
+          cx={size / 2}
+          cy={size / 2}
+          r={radius}
+          fill="none"
+          stroke={color}
+          strokeWidth={strokeWidth}
+          strokeDasharray={circumference}
+          strokeDashoffset={offset}
+          strokeLinecap="round"
+          className="transition-all duration-300"
+        />
+      </svg>
+      {showText && (
+        <span 
+          className="absolute text-xs font-medium"
+          style={{ color, fontSize: size * 0.25 }}
+        >
+          {Math.round(progress)}%
+        </span>
+      )}
+    </div>
+  );
+}
+
+export default ConvergenceSparkline;

atomizer-dashboard/frontend/src/components/chat/ChatMessage.tsx

@@ -5,7 +5,7 @@ import { ToolCallCard, ToolCall } from './ToolCallCard';
 
 export interface Message {
   id: string;
-  role: 'user' | 'assistant';
+  role: 'user' | 'assistant' | 'system';
   content: string;
   timestamp: Date;
   isStreaming?: boolean;
@@ -18,6 +18,18 @@ interface ChatMessageProps {
 
 export const ChatMessage: React.FC<ChatMessageProps> = ({ message }) => {
   const isAssistant = message.role === 'assistant';
+  const isSystem = message.role === 'system';
+
+  // System messages are displayed centered with special styling
+  if (isSystem) {
+    return (
+      <div className="flex justify-center my-2">
+        <div className="px-3 py-1 bg-dark-700/50 rounded-full text-xs text-dark-400 border border-dark-600">
+          {message.content}
+        </div>
+      </div>
+    );
+  }
 
   return (
     <div

atomizer-dashboard/frontend/src/components/chat/ChatPane.tsx

@@ -1,4 +1,4 @@
-import React, { useRef, useEffect, useState } from 'react';
+import React, { useRef, useEffect, useState, useMemo } from 'react';
 import {
   MessageSquare,
   ChevronRight,
@@ -13,8 +13,10 @@ import { ChatMessage } from './ChatMessage';
 import { ChatInput } from './ChatInput';
 import { ThinkingIndicator } from './ThinkingIndicator';
 import { ModeToggle } from './ModeToggle';
-import { useChat } from '../../hooks/useChat';
+import { useChat, CanvasState, CanvasModification } from '../../hooks/useChat';
 import { useStudy } from '../../context/StudyContext';
+import { useCanvasStore } from '../../hooks/useCanvasStore';
+import { NodeType } from '../../lib/canvas/schema';
 
 interface ChatPaneProps {
   isOpen: boolean;
@@ -31,6 +33,76 @@ export const ChatPane: React.FC<ChatPaneProps> = ({
   const messagesEndRef = useRef<HTMLDivElement>(null);
   const [isExpanded, setIsExpanded] = useState(false);
 
+  // Get canvas state and modification functions from the store
+  const { nodes, edges, addNode, updateNodeData, selectNode, deleteSelected } = useCanvasStore();
+
+  // Build canvas state for chat context
+  const canvasState: CanvasState | null = useMemo(() => {
+    if (nodes.length === 0) return null;
+    return {
+      nodes: nodes.map(n => ({
+        id: n.id,
+        type: n.type,
+        data: n.data,
+        position: n.position,
+      })),
+      edges: edges.map(e => ({
+        id: e.id,
+        source: e.source,
+        target: e.target,
+      })),
+      studyName: selectedStudy?.name || selectedStudy?.id,
+    };
+  }, [nodes, edges, selectedStudy]);
+
+  // Track position offset for multiple node additions
+  const nodeAddCountRef = useRef(0);
+
+  // Handle canvas modifications from the assistant
+  const handleCanvasModification = React.useCallback((modification: CanvasModification) => {
+    console.log('Canvas modification from assistant:', modification);
+
+    switch (modification.action) {
+      case 'add_node':
+        if (modification.nodeType) {
+          const nodeType = modification.nodeType as NodeType;
+          // Calculate position: offset each new node so they don't stack
+          const basePosition = modification.position || { x: 100, y: 100 };
+          const offset = nodeAddCountRef.current * 120;
+          const position = {
+            x: basePosition.x,
+            y: basePosition.y + offset,
+          };
+          nodeAddCountRef.current += 1;
+          // Reset counter after a delay (for batch operations)
+          setTimeout(() => { nodeAddCountRef.current = 0; }, 2000);
+
+          addNode(nodeType, position, modification.data);
+          console.log(`Added ${nodeType} node at position:`, position);
+        }
+        break;
+
+      case 'update_node':
+        if (modification.nodeId && modification.data) {
+          updateNodeData(modification.nodeId, modification.data);
+        }
+        break;
+
+      case 'remove_node':
+        if (modification.nodeId) {
+          selectNode(modification.nodeId);
+          deleteSelected();
+        }
+        break;
+
+      // Edge operations would need additional store methods
+      case 'add_edge':
+      case 'remove_edge':
+        console.warn('Edge modification not yet implemented:', modification);
+        break;
+    }
+  }, [addNode, updateNodeData, selectNode, deleteSelected]);
+
   const {
     messages,
     isThinking,
@@ -41,22 +113,38 @@ export const ChatPane: React.FC<ChatPaneProps> = ({
     sendMessage,
     clearMessages,
     switchMode,
+    updateCanvasState,
   } = useChat({
     studyId: selectedStudy?.id,
     mode: 'user',
     useWebSocket: true,
+    canvasState,
     onError: (err) => console.error('Chat error:', err),
+    onCanvasModification: handleCanvasModification,
   });
 
+  // Keep canvas state synced with chat
+  useEffect(() => {
+    updateCanvasState(canvasState);
+  }, [canvasState, updateCanvasState]);
+
   // Auto-scroll to bottom when new messages arrive
   useEffect(() => {
     messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
   }, [messages, isThinking]);
 
-  // Welcome message based on study context
-  const welcomeMessage = selectedStudy
-    ? `Ready to help with **${selectedStudy.name || selectedStudy.id}**. Ask me about optimization progress, results analysis, or how to improve your design.`
-    : 'Select a study to get started, or ask me to help you create a new one.';
+  // Welcome message based on study and canvas context
+  const welcomeMessage = useMemo(() => {
+    if (selectedStudy) {
+      return `Ready to help with **${selectedStudy.name || selectedStudy.id}**. Ask me about optimization progress, results analysis, or how to improve your design.`;
+    }
+    if (nodes.length > 0) {
+      const dvCount = nodes.filter(n => n.type === 'designVar').length;
+      const objCount = nodes.filter(n => n.type === 'objective').length;
+      return `I can see your canvas with ${dvCount} design variables and ${objCount} objectives. Ask me to analyze, validate, or create a study from this setup.`;
+    }
+    return 'Select a study to get started, or build an optimization in the Canvas Builder.';
+  }, [selectedStudy, nodes]);
 
   // Collapsed state - just show toggle button
   if (!isOpen) {

atomizer-dashboard/frontend/src/components/chat/ToolCallCard.tsx

@@ -30,22 +30,25 @@ interface ToolCallCardProps {
 }
 
 // Map tool names to friendly labels and icons
-const TOOL_INFO: Record<string, { label: string; icon: React.ComponentType<{ className?: string }> }> = {
+const TOOL_INFO: Record<string, { label: string; icon: React.ComponentType<{ className?: string }>; color?: string }> = {
   // Study tools
   list_studies: { label: 'Listing Studies', icon: Database },
   get_study_status: { label: 'Getting Status', icon: FileSearch },
-  create_study: { label: 'Creating Study', icon: Settings },
+  create_study: { label: 'Creating Study', icon: Settings, color: 'text-green-400' },
 
   // Optimization tools
-  run_optimization: { label: 'Starting Optimization', icon: Play },
+  run_optimization: { label: 'Starting Optimization', icon: Play, color: 'text-blue-400' },
   stop_optimization: { label: 'Stopping Optimization', icon: XCircle },
   get_optimization_status: { label: 'Checking Progress', icon: BarChart2 },
 
   // Analysis tools
   get_trial_data: { label: 'Querying Trials', icon: Database },
+  query_trials: { label: 'Querying Trials', icon: Database },
+  get_trial_details: { label: 'Getting Trial Details', icon: FileSearch },
   analyze_convergence: { label: 'Analyzing Convergence', icon: BarChart2 },
   compare_trials: { label: 'Comparing Trials', icon: BarChart2 },
   get_best_design: { label: 'Getting Best Design', icon: CheckCircle },
+  get_optimization_summary: { label: 'Getting Summary', icon: BarChart2 },
 
   // Reporting tools
   generate_report: { label: 'Generating Report', icon: FileText },
@@ -56,6 +59,25 @@ const TOOL_INFO: Record<string, { label: string; icon: React.ComponentType<{ cla
   recommend_method: { label: 'Recommending Method', icon: Settings },
   query_extractors: { label: 'Listing Extractors', icon: Database },
 
+  // Config tools (read)
+  read_study_config: { label: 'Reading Config', icon: FileSearch },
+  read_study_readme: { label: 'Reading README', icon: FileText },
+
+  // === WRITE TOOLS (Power Mode) ===
+  add_design_variable: { label: 'Adding Design Variable', icon: Settings, color: 'text-amber-400' },
+  add_extractor: { label: 'Adding Extractor', icon: Settings, color: 'text-amber-400' },
+  add_objective: { label: 'Adding Objective', icon: Settings, color: 'text-amber-400' },
+  add_constraint: { label: 'Adding Constraint', icon: Settings, color: 'text-amber-400' },
+  update_spec_field: { label: 'Updating Field', icon: Settings, color: 'text-amber-400' },
+  remove_node: { label: 'Removing Node', icon: XCircle, color: 'text-red-400' },
+
+  // === INTERVIEW TOOLS ===
+  start_interview: { label: 'Starting Interview', icon: HelpCircle, color: 'text-purple-400' },
+  interview_record: { label: 'Recording Answer', icon: CheckCircle, color: 'text-purple-400' },
+  interview_advance: { label: 'Advancing Interview', icon: Play, color: 'text-purple-400' },
+  interview_status: { label: 'Checking Progress', icon: BarChart2, color: 'text-purple-400' },
+  interview_finalize: { label: 'Creating Study', icon: CheckCircle, color: 'text-green-400' },
+
   // Admin tools (power mode)
   edit_file: { label: 'Editing File', icon: FileText },
   create_file: { label: 'Creating File', icon: FileText },
@@ -104,7 +126,7 @@ export const ToolCallCard: React.FC<ToolCallCardProps> = ({ toolCall }) => {
         )}
 
         {/* Tool icon */}
-        <Icon className="w-4 h-4 text-dark-400 flex-shrink-0" />
+        <Icon className={`w-4 h-4 flex-shrink-0 ${info.color || 'text-dark-400'}`} />
 
         {/* Label */}
         <span className="flex-1 text-sm text-dark-200 truncate">{info.label}</span>

atomizer-dashboard/frontend/src/components/devloop/DevLoopPanel.tsx

@@ -0,0 +1,342 @@
+/**
+ * DevLoopPanel - Control panel for closed-loop development
+ * 
+ * Features:
+ * - Start/stop development cycles
+ * - Real-time phase monitoring
+ * - Iteration history view
+ * - Test result visualization
+ */
+
+import { useState, useEffect, useCallback } from 'react';
+import {
+  PlayCircle,
+  StopCircle,
+  RefreshCw,
+  CheckCircle,
+  XCircle,
+  AlertCircle,
+  Clock,
+  ListChecks,
+  Zap,
+  ChevronDown,
+  ChevronRight,
+} from 'lucide-react';
+import useWebSocket from 'react-use-websocket';
+
+interface LoopState {
+  phase: string;
+  iteration: number;
+  current_task: string | null;
+  last_update: string;
+}
+
+interface CycleResult {
+  objective: string;
+  status: string;
+  iterations: number;
+  duration_seconds: number;
+}
+
+interface TestResult {
+  scenario_id: string;
+  scenario_name: string;
+  passed: boolean;
+  duration_ms: number;
+  error?: string;
+}
+
+const PHASE_COLORS: Record<string, string> = {
+  idle: 'bg-gray-500',
+  planning: 'bg-blue-500',
+  implementing: 'bg-purple-500',
+  testing: 'bg-yellow-500',
+  analyzing: 'bg-orange-500',
+  fixing: 'bg-red-500',
+  verifying: 'bg-green-500',
+};
+
+const PHASE_ICONS: Record<string, React.ReactNode> = {
+  idle: <Clock className="w-4 h-4" />,
+  planning: <ListChecks className="w-4 h-4" />,
+  implementing: <Zap className="w-4 h-4" />,
+  testing: <RefreshCw className="w-4 h-4 animate-spin" />,
+  analyzing: <AlertCircle className="w-4 h-4" />,
+  fixing: <Zap className="w-4 h-4" />,
+  verifying: <CheckCircle className="w-4 h-4" />,
+};
+
+export function DevLoopPanel() {
+  const [state, setState] = useState<LoopState>({
+    phase: 'idle',
+    iteration: 0,
+    current_task: null,
+    last_update: new Date().toISOString(),
+  });
+  const [objective, setObjective] = useState('');
+  const [history, setHistory] = useState<CycleResult[]>([]);
+  const [testResults, setTestResults] = useState<TestResult[]>([]);
+  const [expanded, setExpanded] = useState(true);
+  const [isStarting, setIsStarting] = useState(false);
+
+  // WebSocket connection for real-time updates
+  const { lastJsonMessage, readyState } = useWebSocket(
+    'ws://localhost:8000/api/devloop/ws',
+    {
+      shouldReconnect: () => true,
+      reconnectInterval: 3000,
+    }
+  );
+
+  // Handle WebSocket messages
+  useEffect(() => {
+    if (!lastJsonMessage) return;
+
+    const msg = lastJsonMessage as any;
+
+    switch (msg.type) {
+      case 'connection_ack':
+      case 'state_update':
+      case 'state':
+        if (msg.state) {
+          setState(msg.state);
+        }
+        break;
+      case 'cycle_complete':
+        setHistory(prev => [msg.result, ...prev].slice(0, 10));
+        setIsStarting(false);
+        break;
+      case 'cycle_error':
+        console.error('DevLoop error:', msg.error);
+        setIsStarting(false);
+        break;
+      case 'test_progress':
+        if (msg.result) {
+          setTestResults(prev => [...prev, msg.result]);
+        }
+        break;
+    }
+  }, [lastJsonMessage]);
+
+  // Start a development cycle
+  const startCycle = useCallback(async () => {
+    if (!objective.trim()) return;
+
+    setIsStarting(true);
+    setTestResults([]);
+
+    try {
+      const response = await fetch('http://localhost:8000/api/devloop/start', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({
+          objective: objective.trim(),
+          max_iterations: 10,
+        }),
+      });
+
+      if (!response.ok) {
+        const error = await response.json();
+        console.error('Failed to start cycle:', error);
+        setIsStarting(false);
+      }
+    } catch (error) {
+      console.error('Failed to start cycle:', error);
+      setIsStarting(false);
+    }
+  }, [objective]);
+
+  // Stop the current cycle
+  const stopCycle = useCallback(async () => {
+    try {
+      await fetch('http://localhost:8000/api/devloop/stop', {
+        method: 'POST',
+      });
+    } catch (error) {
+      console.error('Failed to stop cycle:', error);
+    }
+  }, []);
+
+  // Quick start: Create support_arm study
+  const quickStartSupportArm = useCallback(() => {
+    setObjective('Create support_arm optimization study with 5 design variables (center_space, arm_thk, arm_angle, end_thk, base_thk), objectives (minimize displacement, minimize mass), and stress constraint (< 30% yield)');
+    // Auto-start after a brief delay
+    setTimeout(() => {
+      startCycle();
+    }, 500);
+  }, [startCycle]);
+
+  const isActive = state.phase !== 'idle';
+  const wsConnected = readyState === WebSocket.OPEN;
+
+  return (
+    <div className="bg-gray-900 rounded-lg border border-gray-700 overflow-hidden">
+      {/* Header */}
+      <div
+        className="flex items-center justify-between px-4 py-3 bg-gray-800 cursor-pointer"
+        onClick={() => setExpanded(!expanded)}
+      >
+        <div className="flex items-center gap-2">
+          {expanded ? (
+            <ChevronDown className="w-4 h-4 text-gray-400" />
+          ) : (
+            <ChevronRight className="w-4 h-4 text-gray-400" />
+          )}
+          <RefreshCw className="w-5 h-5 text-blue-400" />
+          <h3 className="font-semibold text-white">DevLoop Control</h3>
+        </div>
+        
+        {/* Status indicator */}
+        <div className="flex items-center gap-2">
+          <div
+            className={`w-2 h-2 rounded-full ${
+              wsConnected ? 'bg-green-500' : 'bg-red-500'
+            }`}
+          />
+          <span className={`px-2 py-1 text-xs rounded ${PHASE_COLORS[state.phase]} text-white`}>
+            {state.phase.toUpperCase()}
+          </span>
+        </div>
+      </div>
+
+      {expanded && (
+        <div className="p-4 space-y-4">
+          {/* Objective Input */}
+          <div>
+            <label className="block text-sm text-gray-400 mb-1">
+              Development Objective
+            </label>
+            <textarea
+              value={objective}
+              onChange={(e) => setObjective(e.target.value)}
+              placeholder="e.g., Create support_arm optimization study..."
+              className="w-full px-3 py-2 bg-gray-800 border border-gray-600 rounded text-white text-sm resize-none h-20"
+              disabled={isActive}
+            />
+          </div>
+
+          {/* Quick Actions */}
+          <div className="flex gap-2">
+            <button
+              onClick={quickStartSupportArm}
+              disabled={isActive}
+              className="px-3 py-1.5 bg-purple-600 hover:bg-purple-700 disabled:bg-gray-600 text-white text-sm rounded flex items-center gap-1"
+            >
+              <Zap className="w-4 h-4" />
+              Quick: support_arm
+            </button>
+          </div>
+
+          {/* Control Buttons */}
+          <div className="flex gap-2">
+            {!isActive ? (
+              <button
+                onClick={startCycle}
+                disabled={!objective.trim() || isStarting}
+                className="flex-1 px-4 py-2 bg-green-600 hover:bg-green-700 disabled:bg-gray-600 text-white rounded flex items-center justify-center gap-2"
+              >
+                <PlayCircle className="w-5 h-5" />
+                {isStarting ? 'Starting...' : 'Start Cycle'}
+              </button>
+            ) : (
+              <button
+                onClick={stopCycle}
+                className="flex-1 px-4 py-2 bg-red-600 hover:bg-red-700 text-white rounded flex items-center justify-center gap-2"
+              >
+                <StopCircle className="w-5 h-5" />
+                Stop Cycle
+              </button>
+            )}
+          </div>
+
+          {/* Current Phase Progress */}
+          {isActive && (
+            <div className="bg-gray-800 rounded p-3 space-y-2">
+              <div className="flex items-center gap-2">
+                {PHASE_ICONS[state.phase]}
+                <span className="text-sm text-white font-medium">
+                  {state.phase.charAt(0).toUpperCase() + state.phase.slice(1)}
+                </span>
+                <span className="text-xs text-gray-400">
+                  Iteration {state.iteration + 1}
+                </span>
+              </div>
+              {state.current_task && (
+                <p className="text-xs text-gray-400 truncate">
+                  {state.current_task}
+                </p>
+              )}
+            </div>
+          )}
+
+          {/* Test Results */}
+          {testResults.length > 0 && (
+            <div className="bg-gray-800 rounded p-3">
+              <h4 className="text-sm font-medium text-white mb-2">Test Results</h4>
+              <div className="space-y-1 max-h-32 overflow-y-auto">
+                {testResults.map((test, i) => (
+                  <div
+                    key={`${test.scenario_id}-${i}`}
+                    className="flex items-center gap-2 text-xs"
+                  >
+                    {test.passed ? (
+                      <CheckCircle className="w-3 h-3 text-green-500" />
+                    ) : (
+                      <XCircle className="w-3 h-3 text-red-500" />
+                    )}
+                    <span className="text-gray-300 truncate flex-1">
+                      {test.scenario_name}
+                    </span>
+                    <span className="text-gray-500">
+                      {test.duration_ms.toFixed(0)}ms
+                    </span>
+                  </div>
+                ))}
+              </div>
+            </div>
+          )}
+
+          {/* History */}
+          {history.length > 0 && (
+            <div className="bg-gray-800 rounded p-3">
+              <h4 className="text-sm font-medium text-white mb-2">Recent Cycles</h4>
+              <div className="space-y-2">
+                {history.slice(0, 3).map((cycle, i) => (
+                  <div
+                    key={i}
+                    className="flex items-center justify-between text-xs"
+                  >
+                    <span className="text-gray-300 truncate flex-1">
+                      {cycle.objective.substring(0, 40)}...
+                    </span>
+                    <span
+                      className={`px-1.5 py-0.5 rounded ${
+                        cycle.status === 'completed'
+                          ? 'bg-green-900 text-green-300'
+                          : 'bg-yellow-900 text-yellow-300'
+                      }`}
+                    >
+                      {cycle.status}
+                    </span>
+                  </div>
+                ))}
+              </div>
+            </div>
+          )}
+
+          {/* Phase Legend */}
+          <div className="grid grid-cols-4 gap-2 text-xs">
+            {Object.entries(PHASE_COLORS).map(([phase, color]) => (
+              <div key={phase} className="flex items-center gap-1">
+                <div className={`w-2 h-2 rounded ${color}`} />
+                <span className="text-gray-400 capitalize">{phase}</span>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+    </div>
+  );
+}
+
+export default DevLoopPanel;

atomizer-dashboard/frontend/src/components/intake/ContextFileUpload.tsx

@@ -0,0 +1,292 @@
+/**
+ * ContextFileUpload - Upload context files for study configuration
+ *
+ * Allows uploading markdown, text, PDF, and image files that help
+ * Claude understand optimization goals and generate better documentation.
+ */
+
+import React, { useState, useEffect, useRef, useCallback } from 'react';
+import { Upload, FileText, X, Loader2, AlertCircle, CheckCircle, Trash2, BookOpen } from 'lucide-react';
+import { intakeApi } from '../../api/intake';
+
+interface ContextFileUploadProps {
+  studyName: string;
+  onUploadComplete: () => void;
+}
+
+interface ContextFile {
+  name: string;
+  path: string;
+  size: number;
+  extension: string;
+}
+
+interface FileStatus {
+  file: File;
+  status: 'pending' | 'uploading' | 'success' | 'error';
+  message?: string;
+}
+
+const VALID_EXTENSIONS = ['.md', '.txt', '.pdf', '.png', '.jpg', '.jpeg', '.json', '.csv'];
+
+export const ContextFileUpload: React.FC<ContextFileUploadProps> = ({
+  studyName,
+  onUploadComplete,
+}) => {
+  const [contextFiles, setContextFiles] = useState<ContextFile[]>([]);
+  const [pendingFiles, setPendingFiles] = useState<FileStatus[]>([]);
+  const [isUploading, setIsUploading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const fileInputRef = useRef<HTMLInputElement>(null);
+
+  // Load existing context files
+  const loadContextFiles = useCallback(async () => {
+    try {
+      const response = await intakeApi.listContextFiles(studyName);
+      setContextFiles(response.context_files);
+    } catch (err) {
+      console.error('Failed to load context files:', err);
+    }
+  }, [studyName]);
+
+  useEffect(() => {
+    loadContextFiles();
+  }, [loadContextFiles]);
+
+  const validateFile = (file: File): { valid: boolean; reason?: string } => {
+    const ext = '.' + file.name.split('.').pop()?.toLowerCase();
+    if (!VALID_EXTENSIONS.includes(ext)) {
+      return { valid: false, reason: `Invalid type: ${ext}` };
+    }
+    // Max 10MB per file
+    if (file.size > 10 * 1024 * 1024) {
+      return { valid: false, reason: 'File too large (max 10MB)' };
+    }
+    return { valid: true };
+  };
+
+  const addFiles = useCallback((newFiles: File[]) => {
+    const validFiles: FileStatus[] = [];
+    
+    for (const file of newFiles) {
+      // Skip duplicates
+      if (pendingFiles.some(f => f.file.name === file.name)) {
+        continue;
+      }
+      if (contextFiles.some(f => f.name === file.name)) {
+        continue;
+      }
+      
+      const validation = validateFile(file);
+      if (validation.valid) {
+        validFiles.push({ file, status: 'pending' });
+      } else {
+        validFiles.push({ file, status: 'error', message: validation.reason });
+      }
+    }
+    
+    setPendingFiles(prev => [...prev, ...validFiles]);
+  }, [pendingFiles, contextFiles]);
+
+  const handleFileSelect = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
+    const selectedFiles = Array.from(e.target.files || []);
+    addFiles(selectedFiles);
+    e.target.value = '';
+  }, [addFiles]);
+
+  const removeFile = (index: number) => {
+    setPendingFiles(prev => prev.filter((_, i) => i !== index));
+  };
+
+  const handleUpload = async () => {
+    const filesToUpload = pendingFiles.filter(f => f.status === 'pending');
+    if (filesToUpload.length === 0) return;
+
+    setIsUploading(true);
+    setError(null);
+
+    try {
+      const response = await intakeApi.uploadContextFiles(
+        studyName,
+        filesToUpload.map(f => f.file)
+      );
+
+      // Update pending file statuses
+      const uploadResults = new Map(
+        response.uploaded_files.map(f => [f.name, f.status === 'uploaded'])
+      );
+
+      setPendingFiles(prev => prev.map(f => {
+        if (f.status !== 'pending') return f;
+        const success = uploadResults.get(f.file.name);
+        return {
+          ...f,
+          status: success ? 'success' : 'error',
+          message: success ? undefined : 'Upload failed',
+        };
+      }));
+
+      // Refresh and clear after a moment
+      setTimeout(() => {
+        setPendingFiles(prev => prev.filter(f => f.status !== 'success'));
+        loadContextFiles();
+        onUploadComplete();
+      }, 1500);
+
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Upload failed');
+    } finally {
+      setIsUploading(false);
+    }
+  };
+
+  const handleDeleteFile = async (filename: string) => {
+    try {
+      await intakeApi.deleteContextFile(studyName, filename);
+      loadContextFiles();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Delete failed');
+    }
+  };
+
+  const pendingCount = pendingFiles.filter(f => f.status === 'pending').length;
+
+  const formatSize = (bytes: number) => {
+    if (bytes < 1024) return `${bytes} B`;
+    if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`;
+    return `${(bytes / 1024 / 1024).toFixed(1)} MB`;
+  };
+
+  return (
+    <div className="space-y-3">
+      <div className="flex items-center justify-between">
+        <h5 className="text-sm font-medium text-dark-300 flex items-center gap-2">
+          <BookOpen className="w-4 h-4 text-purple-400" />
+          Context Files
+        </h5>
+        <button
+          onClick={() => fileInputRef.current?.click()}
+          className="flex items-center gap-1.5 px-2 py-1 rounded text-xs font-medium
+                     bg-purple-500/10 text-purple-400 hover:bg-purple-500/20
+                     transition-colors"
+        >
+          <Upload className="w-3 h-3" />
+          Add Context
+        </button>
+      </div>
+
+      <p className="text-xs text-dark-500">
+        Add .md, .txt, or .pdf files describing your optimization goals. Claude will use these to generate documentation.
+      </p>
+
+      {/* Error Display */}
+      {error && (
+        <div className="p-2 rounded-lg bg-red-500/10 border border-red-500/30 text-red-400 text-xs flex items-center gap-2">
+          <AlertCircle className="w-3 h-3 flex-shrink-0" />
+          {error}
+          <button onClick={() => setError(null)} className="ml-auto hover:text-white">
+            <X className="w-3 h-3" />
+          </button>
+        </div>
+      )}
+
+      {/* Existing Context Files */}
+      {contextFiles.length > 0 && (
+        <div className="space-y-1">
+          {contextFiles.map((file) => (
+            <div
+              key={file.name}
+              className="flex items-center justify-between p-2 rounded-lg bg-purple-500/5 border border-purple-500/20"
+            >
+              <div className="flex items-center gap-2">
+                <FileText className="w-4 h-4 text-purple-400" />
+                <span className="text-sm text-white">{file.name}</span>
+                <span className="text-xs text-dark-500">{formatSize(file.size)}</span>
+              </div>
+              <button
+                onClick={() => handleDeleteFile(file.name)}
+                className="p-1 hover:bg-white/10 rounded text-dark-400 hover:text-red-400"
+                title="Delete file"
+              >
+                <Trash2 className="w-3 h-3" />
+              </button>
+            </div>
+          ))}
+        </div>
+      )}
+
+      {/* Pending Files */}
+      {pendingFiles.length > 0 && (
+        <div className="space-y-1">
+          {pendingFiles.map((f, i) => (
+            <div
+              key={i}
+              className={`flex items-center justify-between p-2 rounded-lg
+                         ${f.status === 'error' ? 'bg-red-500/10' : 
+                           f.status === 'success' ? 'bg-green-500/10' :
+                           'bg-dark-700'}`}
+            >
+              <div className="flex items-center gap-2">
+                {f.status === 'pending' && <FileText className="w-4 h-4 text-dark-400" />}
+                {f.status === 'uploading' && <Loader2 className="w-4 h-4 text-purple-400 animate-spin" />}
+                {f.status === 'success' && <CheckCircle className="w-4 h-4 text-green-400" />}
+                {f.status === 'error' && <AlertCircle className="w-4 h-4 text-red-400" />}
+                <span className={`text-sm ${f.status === 'error' ? 'text-red-400' : 
+                                            f.status === 'success' ? 'text-green-400' : 
+                                            'text-white'}`}>
+                  {f.file.name}
+                </span>
+                {f.message && (
+                  <span className="text-xs text-red-400">({f.message})</span>
+                )}
+              </div>
+              {f.status === 'pending' && (
+                <button
+                  onClick={() => removeFile(i)}
+                  className="p-1 hover:bg-white/10 rounded text-dark-400 hover:text-white"
+                >
+                  <X className="w-3 h-3" />
+                </button>
+              )}
+            </div>
+          ))}
+        </div>
+      )}
+
+      {/* Upload Button */}
+      {pendingCount > 0 && (
+        <button
+          onClick={handleUpload}
+          disabled={isUploading}
+          className="w-full flex items-center justify-center gap-2 px-3 py-2 rounded-lg
+                     bg-purple-500 text-white text-sm font-medium
+                     hover:bg-purple-400 disabled:opacity-50 disabled:cursor-not-allowed
+                     transition-colors"
+        >
+          {isUploading ? (
+            <>
+              <Loader2 className="w-4 h-4 animate-spin" />
+              Uploading...
+            </>
+          ) : (
+            <>
+              <Upload className="w-4 h-4" />
+              Upload {pendingCount} {pendingCount === 1 ? 'File' : 'Files'}
+            </>
+          )}
+        </button>
+      )}
+
+      <input
+        ref={fileInputRef}
+        type="file"
+        multiple
+        accept={VALID_EXTENSIONS.join(',')}
+        onChange={handleFileSelect}
+        className="hidden"
+      />
+    </div>
+  );
+};
+
+export default ContextFileUpload;

atomizer-dashboard/frontend/src/components/intake/CreateStudyCard.tsx

@@ -0,0 +1,227 @@
+/**
+ * CreateStudyCard - Card for initiating new study creation
+ *
+ * Displays a prominent card on the Home page that allows users to
+ * create a new study through the intake workflow.
+ */
+
+import React, { useState } from 'react';
+import { Plus, Loader2 } from 'lucide-react';
+import { intakeApi } from '../../api/intake';
+import { TopicInfo } from '../../types/intake';
+
+interface CreateStudyCardProps {
+  topics: TopicInfo[];
+  onStudyCreated: (studyName: string) => void;
+}
+
+export const CreateStudyCard: React.FC<CreateStudyCardProps> = ({
+  topics,
+  onStudyCreated,
+}) => {
+  const [isExpanded, setIsExpanded] = useState(false);
+  const [studyName, setStudyName] = useState('');
+  const [description, setDescription] = useState('');
+  const [selectedTopic, setSelectedTopic] = useState('');
+  const [newTopic, setNewTopic] = useState('');
+  const [isCreating, setIsCreating] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleCreate = async () => {
+    if (!studyName.trim()) {
+      setError('Study name is required');
+      return;
+    }
+
+    // Validate study name format
+    const nameRegex = /^[a-z0-9_]+$/;
+    if (!nameRegex.test(studyName)) {
+      setError('Study name must be lowercase with underscores only (e.g., my_study_name)');
+      return;
+    }
+
+    setIsCreating(true);
+    setError(null);
+
+    try {
+      const topic = newTopic.trim() || selectedTopic || undefined;
+      await intakeApi.createInbox({
+        study_name: studyName.trim(),
+        description: description.trim() || undefined,
+        topic,
+      });
+
+      // Reset form
+      setStudyName('');
+      setDescription('');
+      setSelectedTopic('');
+      setNewTopic('');
+      setIsExpanded(false);
+
+      onStudyCreated(studyName.trim());
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to create study');
+    } finally {
+      setIsCreating(false);
+    }
+  };
+
+  if (!isExpanded) {
+    return (
+      <button
+        onClick={() => setIsExpanded(true)}
+        className="w-full glass rounded-xl p-6 border border-dashed border-primary-400/30 
+                   hover:border-primary-400/60 hover:bg-primary-400/5 transition-all
+                   flex items-center justify-center gap-3 group"
+      >
+        <div className="w-12 h-12 rounded-xl bg-primary-400/10 flex items-center justify-center
+                        group-hover:bg-primary-400/20 transition-colors">
+          <Plus className="w-6 h-6 text-primary-400" />
+        </div>
+        <div className="text-left">
+          <h3 className="text-lg font-semibold text-white">Create New Study</h3>
+          <p className="text-sm text-dark-400">Set up a new optimization study</p>
+        </div>
+      </button>
+    );
+  }
+
+  return (
+    <div className="glass-strong rounded-xl border border-primary-400/20 overflow-hidden">
+      {/* Header */}
+      <div className="px-6 py-4 border-b border-primary-400/10 flex items-center justify-between">
+        <div className="flex items-center gap-3">
+          <div className="w-10 h-10 rounded-lg bg-primary-400/10 flex items-center justify-center">
+            <Plus className="w-5 h-5 text-primary-400" />
+          </div>
+          <h3 className="text-lg font-semibold text-white">Create New Study</h3>
+        </div>
+        <button
+          onClick={() => setIsExpanded(false)}
+          className="text-dark-400 hover:text-white transition-colors text-sm"
+        >
+          Cancel
+        </button>
+      </div>
+
+      {/* Form */}
+      <div className="p-6 space-y-4">
+        {/* Study Name */}
+        <div>
+          <label className="block text-sm font-medium text-dark-300 mb-2">
+            Study Name <span className="text-red-400">*</span>
+          </label>
+          <input
+            type="text"
+            value={studyName}
+            onChange={(e) => setStudyName(e.target.value.toLowerCase().replace(/[^a-z0-9_]/g, '_'))}
+            placeholder="my_optimization_study"
+            className="w-full px-4 py-2.5 rounded-lg bg-dark-800 border border-dark-600 
+                       text-white placeholder-dark-500 focus:border-primary-400 
+                       focus:outline-none focus:ring-1 focus:ring-primary-400/50"
+          />
+          <p className="mt-1 text-xs text-dark-500">
+            Lowercase letters, numbers, and underscores only
+          </p>
+        </div>
+
+        {/* Description */}
+        <div>
+          <label className="block text-sm font-medium text-dark-300 mb-2">
+            Description
+          </label>
+          <textarea
+            value={description}
+            onChange={(e) => setDescription(e.target.value)}
+            placeholder="Brief description of the optimization goal..."
+            rows={2}
+            className="w-full px-4 py-2.5 rounded-lg bg-dark-800 border border-dark-600 
+                       text-white placeholder-dark-500 focus:border-primary-400 
+                       focus:outline-none focus:ring-1 focus:ring-primary-400/50 resize-none"
+          />
+        </div>
+
+        {/* Topic Selection */}
+        <div>
+          <label className="block text-sm font-medium text-dark-300 mb-2">
+            Topic Folder
+          </label>
+          <div className="flex gap-2">
+            <select
+              value={selectedTopic}
+              onChange={(e) => {
+                setSelectedTopic(e.target.value);
+                setNewTopic('');
+              }}
+              className="flex-1 px-4 py-2.5 rounded-lg bg-dark-800 border border-dark-600 
+                         text-white focus:border-primary-400 focus:outline-none 
+                         focus:ring-1 focus:ring-primary-400/50"
+            >
+              <option value="">Select existing topic...</option>
+              {topics.map((topic) => (
+                <option key={topic.name} value={topic.name}>
+                  {topic.name} ({topic.study_count} studies)
+                </option>
+              ))}
+            </select>
+            <span className="text-dark-500 self-center">or</span>
+            <input
+              type="text"
+              value={newTopic}
+              onChange={(e) => {
+                setNewTopic(e.target.value.replace(/[^A-Za-z0-9_]/g, '_'));
+                setSelectedTopic('');
+              }}
+              placeholder="New_Topic"
+              className="flex-1 px-4 py-2.5 rounded-lg bg-dark-800 border border-dark-600 
+                         text-white placeholder-dark-500 focus:border-primary-400 
+                         focus:outline-none focus:ring-1 focus:ring-primary-400/50"
+            />
+          </div>
+        </div>
+
+        {/* Error Message */}
+        {error && (
+          <div className="p-3 rounded-lg bg-red-500/10 border border-red-500/30 text-red-400 text-sm">
+            {error}
+          </div>
+        )}
+
+        {/* Actions */}
+        <div className="flex justify-end gap-3 pt-2">
+          <button
+            onClick={() => setIsExpanded(false)}
+            className="px-4 py-2 rounded-lg border border-dark-600 text-dark-300 
+                       hover:border-dark-500 hover:text-white transition-colors"
+          >
+            Cancel
+          </button>
+          <button
+            onClick={handleCreate}
+            disabled={isCreating || !studyName.trim()}
+            className="px-6 py-2 rounded-lg font-medium transition-all disabled:opacity-50
+                       flex items-center gap-2"
+            style={{
+              background: 'linear-gradient(135deg, #00d4e6 0%, #0891b2 100%)',
+              color: '#000',
+            }}
+          >
+            {isCreating ? (
+              <>
+                <Loader2 className="w-4 h-4 animate-spin" />
+                Creating...
+              </>
+            ) : (
+              <>
+                <Plus className="w-4 h-4" />
+                Create Study
+              </>
+            )}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default CreateStudyCard;

atomizer-dashboard/frontend/src/components/intake/ExpressionList.tsx

@@ -0,0 +1,270 @@
+/**
+ * ExpressionList - Display discovered expressions with selection capability
+ *
+ * Shows expressions from NX introspection, allowing users to:
+ * - View all discovered expressions
+ * - See which are design variable candidates (auto-detected)
+ * - Select/deselect expressions to use as design variables
+ * - View expression values and units
+ */
+
+import React, { useState } from 'react';
+import {
+  Check,
+  Search,
+  AlertTriangle,
+  Sparkles,
+  Info,
+  Variable,
+} from 'lucide-react';
+import { ExpressionInfo } from '../../types/intake';
+
+interface ExpressionListProps {
+  /** Expression data from introspection */
+  expressions: ExpressionInfo[];
+  /** Mass from introspection (kg) */
+  massKg?: number | null;
+  /** Currently selected expressions (to become DVs) */
+  selectedExpressions: string[];
+  /** Callback when selection changes */
+  onSelectionChange: (selected: string[]) => void;
+  /** Whether in read-only mode */
+  readOnly?: boolean;
+  /** Compact display mode */
+  compact?: boolean;
+}
+
+export const ExpressionList: React.FC<ExpressionListProps> = ({
+  expressions,
+  massKg,
+  selectedExpressions,
+  onSelectionChange,
+  readOnly = false,
+  compact = false,
+}) => {
+  const [filter, setFilter] = useState('');
+  const [showCandidatesOnly, setShowCandidatesOnly] = useState(true);
+
+  // Filter expressions based on search and candidate toggle
+  const filteredExpressions = expressions.filter((expr) => {
+    const matchesSearch = filter === '' || 
+      expr.name.toLowerCase().includes(filter.toLowerCase());
+    const matchesCandidate = !showCandidatesOnly || expr.is_candidate;
+    return matchesSearch && matchesCandidate;
+  });
+
+  // Sort: candidates first, then by confidence, then alphabetically
+  const sortedExpressions = [...filteredExpressions].sort((a, b) => {
+    if (a.is_candidate !== b.is_candidate) {
+      return a.is_candidate ? -1 : 1;
+    }
+    if (a.confidence !== b.confidence) {
+      return b.confidence - a.confidence;
+    }
+    return a.name.localeCompare(b.name);
+  });
+
+  const toggleExpression = (name: string) => {
+    if (readOnly) return;
+    
+    if (selectedExpressions.includes(name)) {
+      onSelectionChange(selectedExpressions.filter(n => n !== name));
+    } else {
+      onSelectionChange([...selectedExpressions, name]);
+    }
+  };
+
+  const selectAllCandidates = () => {
+    const candidateNames = expressions
+      .filter(e => e.is_candidate)
+      .map(e => e.name);
+    onSelectionChange(candidateNames);
+  };
+
+  const clearSelection = () => {
+    onSelectionChange([]);
+  };
+
+  const candidateCount = expressions.filter(e => e.is_candidate).length;
+
+  if (expressions.length === 0) {
+    return (
+      <div className="p-4 rounded-lg bg-dark-700/50 border border-dark-600">
+        <div className="flex items-center gap-2 text-dark-400">
+          <AlertTriangle className="w-4 h-4" />
+          <span>No expressions found. Run introspection to discover model parameters.</span>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-3">
+      {/* Header with stats */}
+      <div className="flex items-center justify-between">
+        <div className="flex items-center gap-3">
+          <h5 className="text-sm font-medium text-dark-300 flex items-center gap-2">
+            <Variable className="w-4 h-4" />
+            Discovered Expressions
+          </h5>
+          <span className="text-xs text-dark-500">
+            {expressions.length} total, {candidateCount} candidates
+          </span>
+          {massKg && (
+            <span className="text-xs text-primary-400">
+              Mass: {massKg.toFixed(3)} kg
+            </span>
+          )}
+        </div>
+        {!readOnly && selectedExpressions.length > 0 && (
+          <span className="text-xs text-green-400">
+            {selectedExpressions.length} selected
+          </span>
+        )}
+      </div>
+
+      {/* Controls */}
+      {!compact && (
+        <div className="flex items-center gap-3">
+          {/* Search */}
+          <div className="relative flex-1 max-w-xs">
+            <Search className="absolute left-2.5 top-1/2 -translate-y-1/2 w-4 h-4 text-dark-500" />
+            <input
+              type="text"
+              placeholder="Search expressions..."
+              value={filter}
+              onChange={(e) => setFilter(e.target.value)}
+              className="w-full pl-8 pr-3 py-1.5 text-sm rounded-lg bg-dark-700 border border-dark-600
+                         text-white placeholder-dark-500 focus:border-primary-500/50 focus:outline-none"
+            />
+          </div>
+
+          {/* Show candidates only toggle */}
+          <label className="flex items-center gap-2 text-xs text-dark-400 cursor-pointer">
+            <input
+              type="checkbox"
+              checked={showCandidatesOnly}
+              onChange={(e) => setShowCandidatesOnly(e.target.checked)}
+              className="w-4 h-4 rounded border-dark-500 bg-dark-700 text-primary-500 
+                         focus:ring-primary-500/30"
+            />
+            Candidates only
+          </label>
+
+          {/* Quick actions */}
+          {!readOnly && (
+            <div className="flex items-center gap-2">
+              <button
+                onClick={selectAllCandidates}
+                className="px-2 py-1 text-xs rounded bg-primary-500/10 text-primary-400 
+                           hover:bg-primary-500/20 transition-colors"
+              >
+                Select all candidates
+              </button>
+              <button
+                onClick={clearSelection}
+                className="px-2 py-1 text-xs rounded bg-dark-600 text-dark-400 
+                           hover:bg-dark-500 transition-colors"
+              >
+                Clear
+              </button>
+            </div>
+          )}
+        </div>
+      )}
+
+      {/* Expression list */}
+      <div className={`rounded-lg border border-dark-600 overflow-hidden ${
+        compact ? 'max-h-48' : 'max-h-72'
+      } overflow-y-auto`}>
+        <table className="w-full text-sm">
+          <thead className="bg-dark-700 sticky top-0">
+            <tr>
+              {!readOnly && (
+                <th className="w-8 px-2 py-2"></th>
+              )}
+              <th className="px-3 py-2 text-left text-dark-400 font-medium">Name</th>
+              <th className="px-3 py-2 text-right text-dark-400 font-medium w-24">Value</th>
+              <th className="px-3 py-2 text-left text-dark-400 font-medium w-16">Units</th>
+              <th className="px-3 py-2 text-center text-dark-400 font-medium w-20">Candidate</th>
+            </tr>
+          </thead>
+          <tbody className="divide-y divide-dark-700">
+            {sortedExpressions.map((expr) => {
+              const isSelected = selectedExpressions.includes(expr.name);
+              return (
+                <tr
+                  key={expr.name}
+                  onClick={() => toggleExpression(expr.name)}
+                  className={`
+                    ${readOnly ? '' : 'cursor-pointer hover:bg-dark-700/50'}
+                    ${isSelected ? 'bg-primary-500/10' : ''}
+                    transition-colors
+                  `}
+                >
+                  {!readOnly && (
+                    <td className="px-2 py-2">
+                      <div className={`w-5 h-5 rounded border flex items-center justify-center
+                        ${isSelected 
+                          ? 'bg-primary-500 border-primary-500' 
+                          : 'border-dark-500 bg-dark-700'
+                        }`}
+                      >
+                        {isSelected && <Check className="w-3 h-3 text-white" />}
+                      </div>
+                    </td>
+                  )}
+                  <td className="px-3 py-2">
+                    <div className="flex items-center gap-2">
+                      <code className={`text-xs ${isSelected ? 'text-primary-300' : 'text-white'}`}>
+                        {expr.name}
+                      </code>
+                      {expr.formula && (
+                        <span className="text-xs text-dark-500" title={expr.formula}>
+                          <Info className="w-3 h-3" />
+                        </span>
+                      )}
+                    </div>
+                  </td>
+                  <td className="px-3 py-2 text-right font-mono text-xs text-dark-300">
+                    {expr.value !== null ? expr.value.toFixed(3) : '-'}
+                  </td>
+                  <td className="px-3 py-2 text-xs text-dark-400">
+                    {expr.units || '-'}
+                  </td>
+                  <td className="px-3 py-2 text-center">
+                    {expr.is_candidate ? (
+                      <span className="inline-flex items-center gap-1 px-1.5 py-0.5 rounded text-xs 
+                                       bg-green-500/10 text-green-400">
+                        <Sparkles className="w-3 h-3" />
+                        {Math.round(expr.confidence * 100)}%
+                      </span>
+                    ) : (
+                      <span className="text-xs text-dark-500">-</span>
+                    )}
+                  </td>
+                </tr>
+              );
+            })}
+          </tbody>
+        </table>
+        
+        {sortedExpressions.length === 0 && (
+          <div className="px-4 py-8 text-center text-dark-500">
+            No expressions match your filter
+          </div>
+        )}
+      </div>
+
+      {/* Help text */}
+      {!readOnly && !compact && (
+        <p className="text-xs text-dark-500">
+          Select expressions to use as design variables. Candidates (marked with %) are 
+          automatically identified based on naming patterns and units.
+        </p>
+      )}
+    </div>
+  );
+};
+
+export default ExpressionList;

atomizer-dashboard/frontend/src/components/intake/FileDropzone.tsx

@@ -0,0 +1,348 @@
+/**
+ * FileDropzone - Drag and drop file upload component
+ *
+ * Supports drag-and-drop or click-to-browse for model files.
+ * Accepts .prt, .sim, .fem, .afem files.
+ */
+
+import React, { useState, useCallback, useRef } from 'react';
+import { Upload, FileText, X, Loader2, AlertCircle, CheckCircle } from 'lucide-react';
+import { intakeApi } from '../../api/intake';
+
+interface FileDropzoneProps {
+  studyName: string;
+  onUploadComplete: () => void;
+  compact?: boolean;
+}
+
+interface FileStatus {
+  file: File;
+  status: 'pending' | 'uploading' | 'success' | 'error';
+  message?: string;
+}
+
+const VALID_EXTENSIONS = ['.prt', '.sim', '.fem', '.afem'];
+
+export const FileDropzone: React.FC<FileDropzoneProps> = ({
+  studyName,
+  onUploadComplete,
+  compact = false,
+}) => {
+  const [isDragging, setIsDragging] = useState(false);
+  const [files, setFiles] = useState<FileStatus[]>([]);
+  const [isUploading, setIsUploading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const fileInputRef = useRef<HTMLInputElement>(null);
+
+  const validateFile = (file: File): { valid: boolean; reason?: string } => {
+    const ext = '.' + file.name.split('.').pop()?.toLowerCase();
+    if (!VALID_EXTENSIONS.includes(ext)) {
+      return { valid: false, reason: `Invalid type: ${ext}` };
+    }
+    // Max 500MB per file
+    if (file.size > 500 * 1024 * 1024) {
+      return { valid: false, reason: 'File too large (max 500MB)' };
+    }
+    return { valid: true };
+  };
+
+  const handleDragEnter = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsDragging(true);
+  }, []);
+
+  const handleDragLeave = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsDragging(false);
+  }, []);
+
+  const handleDragOver = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+  }, []);
+
+  const addFiles = useCallback((newFiles: File[]) => {
+    const validFiles: FileStatus[] = [];
+    
+    for (const file of newFiles) {
+      // Skip duplicates
+      if (files.some(f => f.file.name === file.name)) {
+        continue;
+      }
+      
+      const validation = validateFile(file);
+      if (validation.valid) {
+        validFiles.push({ file, status: 'pending' });
+      } else {
+        validFiles.push({ file, status: 'error', message: validation.reason });
+      }
+    }
+    
+    setFiles(prev => [...prev, ...validFiles]);
+  }, [files]);
+
+  const handleDrop = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsDragging(false);
+    
+    const droppedFiles = Array.from(e.dataTransfer.files);
+    addFiles(droppedFiles);
+  }, [addFiles]);
+
+  const handleFileSelect = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
+    const selectedFiles = Array.from(e.target.files || []);
+    addFiles(selectedFiles);
+    // Reset input so the same file can be selected again
+    e.target.value = '';
+  }, [addFiles]);
+
+  const removeFile = (index: number) => {
+    setFiles(prev => prev.filter((_, i) => i !== index));
+  };
+
+  const handleUpload = async () => {
+    const pendingFiles = files.filter(f => f.status === 'pending');
+    if (pendingFiles.length === 0) return;
+
+    setIsUploading(true);
+    setError(null);
+
+    try {
+      // Upload files
+      const response = await intakeApi.uploadFiles(
+        studyName,
+        pendingFiles.map(f => f.file)
+      );
+
+      // Update file statuses based on response
+      const uploadResults = new Map(
+        response.uploaded_files.map(f => [f.name, f.status === 'uploaded'])
+      );
+
+      setFiles(prev => prev.map(f => {
+        if (f.status !== 'pending') return f;
+        const success = uploadResults.get(f.file.name);
+        return {
+          ...f,
+          status: success ? 'success' : 'error',
+          message: success ? undefined : 'Upload failed',
+        };
+      }));
+
+      // Clear successful uploads after a moment and refresh
+      setTimeout(() => {
+        setFiles(prev => prev.filter(f => f.status !== 'success'));
+        onUploadComplete();
+      }, 1500);
+
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Upload failed');
+      setFiles(prev => prev.map(f => 
+        f.status === 'pending' 
+          ? { ...f, status: 'error', message: 'Upload failed' }
+          : f
+      ));
+    } finally {
+      setIsUploading(false);
+    }
+  };
+
+  const pendingCount = files.filter(f => f.status === 'pending').length;
+
+  if (compact) {
+    // Compact inline version
+    return (
+      <div className="space-y-2">
+        <div className="flex items-center gap-2">
+          <button
+            onClick={() => fileInputRef.current?.click()}
+            className="flex items-center gap-2 px-3 py-1.5 rounded-lg text-sm font-medium
+                       bg-dark-700 text-dark-300 hover:bg-dark-600 hover:text-white
+                       transition-colors"
+          >
+            <Upload className="w-4 h-4" />
+            Add Files
+          </button>
+          {pendingCount > 0 && (
+            <button
+              onClick={handleUpload}
+              disabled={isUploading}
+              className="flex items-center gap-2 px-3 py-1.5 rounded-lg text-sm font-medium
+                         bg-primary-500/10 text-primary-400 hover:bg-primary-500/20
+                         disabled:opacity-50 transition-colors"
+            >
+              {isUploading ? (
+                <Loader2 className="w-4 h-4 animate-spin" />
+              ) : (
+                <Upload className="w-4 h-4" />
+              )}
+              Upload {pendingCount} {pendingCount === 1 ? 'File' : 'Files'}
+            </button>
+          )}
+        </div>
+        
+        {/* File list */}
+        {files.length > 0 && (
+          <div className="flex flex-wrap gap-2">
+            {files.map((f, i) => (
+              <span
+                key={i}
+                className={`inline-flex items-center gap-1.5 px-2 py-1 rounded text-xs
+                           ${f.status === 'error' ? 'bg-red-500/10 text-red-400' : 
+                             f.status === 'success' ? 'bg-green-500/10 text-green-400' :
+                             'bg-dark-700 text-dark-300'}`}
+              >
+                {f.status === 'uploading' && <Loader2 className="w-3 h-3 animate-spin" />}
+                {f.status === 'success' && <CheckCircle className="w-3 h-3" />}
+                {f.status === 'error' && <AlertCircle className="w-3 h-3" />}
+                {f.file.name}
+                {f.status === 'pending' && (
+                  <button onClick={() => removeFile(i)} className="hover:text-white">
+                    <X className="w-3 h-3" />
+                  </button>
+                )}
+              </span>
+            ))}
+          </div>
+        )}
+        
+        <input
+          ref={fileInputRef}
+          type="file"
+          multiple
+          accept={VALID_EXTENSIONS.join(',')}
+          onChange={handleFileSelect}
+          className="hidden"
+        />
+      </div>
+    );
+  }
+
+  // Full dropzone version
+  return (
+    <div className="space-y-4">
+      {/* Dropzone */}
+      <div
+        onDragEnter={handleDragEnter}
+        onDragLeave={handleDragLeave}
+        onDragOver={handleDragOver}
+        onDrop={handleDrop}
+        onClick={() => fileInputRef.current?.click()}
+        className={`
+          relative border-2 border-dashed rounded-xl p-6 cursor-pointer
+          transition-all duration-200
+          ${isDragging 
+            ? 'border-primary-400 bg-primary-400/5' 
+            : 'border-dark-600 hover:border-primary-400/50 hover:bg-white/5'
+          }
+        `}
+      >
+        <div className="flex flex-col items-center text-center">
+          <div className={`w-12 h-12 rounded-full flex items-center justify-center mb-3
+                          ${isDragging ? 'bg-primary-400/20 text-primary-400' : 'bg-dark-700 text-dark-400'}`}>
+            <Upload className="w-6 h-6" />
+          </div>
+          <p className="text-white font-medium mb-1">
+            {isDragging ? 'Drop files here' : 'Drop model files here'}
+          </p>
+          <p className="text-sm text-dark-400">
+            or <span className="text-primary-400">click to browse</span>
+          </p>
+          <p className="text-xs text-dark-500 mt-2">
+            Accepts: {VALID_EXTENSIONS.join(', ')}
+          </p>
+        </div>
+      </div>
+
+      {/* Error */}
+      {error && (
+        <div className="p-3 rounded-lg bg-red-500/10 border border-red-500/30 text-red-400 text-sm flex items-center gap-2">
+          <AlertCircle className="w-4 h-4 flex-shrink-0" />
+          {error}
+        </div>
+      )}
+
+      {/* File List */}
+      {files.length > 0 && (
+        <div className="space-y-2">
+          <h5 className="text-sm font-medium text-dark-300">Files to Upload</h5>
+          <div className="space-y-1">
+            {files.map((f, i) => (
+              <div
+                key={i}
+                className={`flex items-center justify-between p-2 rounded-lg
+                           ${f.status === 'error' ? 'bg-red-500/10' : 
+                             f.status === 'success' ? 'bg-green-500/10' :
+                             'bg-dark-700'}`}
+              >
+                <div className="flex items-center gap-2">
+                  {f.status === 'pending' && <FileText className="w-4 h-4 text-dark-400" />}
+                  {f.status === 'uploading' && <Loader2 className="w-4 h-4 text-primary-400 animate-spin" />}
+                  {f.status === 'success' && <CheckCircle className="w-4 h-4 text-green-400" />}
+                  {f.status === 'error' && <AlertCircle className="w-4 h-4 text-red-400" />}
+                  <span className={`text-sm ${f.status === 'error' ? 'text-red-400' : 
+                                              f.status === 'success' ? 'text-green-400' : 
+                                              'text-white'}`}>
+                    {f.file.name}
+                  </span>
+                  {f.message && (
+                    <span className="text-xs text-red-400">({f.message})</span>
+                  )}
+                </div>
+                {f.status === 'pending' && (
+                  <button
+                    onClick={(e) => {
+                      e.stopPropagation();
+                      removeFile(i);
+                    }}
+                    className="p-1 hover:bg-white/10 rounded text-dark-400 hover:text-white"
+                  >
+                    <X className="w-4 h-4" />
+                  </button>
+                )}
+              </div>
+            ))}
+          </div>
+
+          {/* Upload Button */}
+          {pendingCount > 0 && (
+            <button
+              onClick={handleUpload}
+              disabled={isUploading}
+              className="w-full flex items-center justify-center gap-2 px-4 py-2 rounded-lg
+                         bg-primary-500 text-white font-medium
+                         hover:bg-primary-400 disabled:opacity-50 disabled:cursor-not-allowed
+                         transition-colors"
+            >
+              {isUploading ? (
+                <>
+                  <Loader2 className="w-4 h-4 animate-spin" />
+                  Uploading...
+                </>
+              ) : (
+                <>
+                  <Upload className="w-4 h-4" />
+                  Upload {pendingCount} {pendingCount === 1 ? 'File' : 'Files'}
+                </>
+              )}
+            </button>
+          )}
+        </div>
+      )}
+
+      <input
+        ref={fileInputRef}
+        type="file"
+        multiple
+        accept={VALID_EXTENSIONS.join(',')}
+        onChange={handleFileSelect}
+        className="hidden"
+      />
+    </div>
+  );
+};
+
+export default FileDropzone;

atomizer-dashboard/frontend/src/components/intake/FinalizeModal.tsx

@@ -0,0 +1,272 @@
+/**
+ * FinalizeModal - Modal for finalizing an inbox study
+ *
+ * Allows user to:
+ * - Select/create topic folder
+ * - Choose whether to run baseline FEA
+ * - See progress during finalization
+ */
+
+import React, { useState, useEffect } from 'react';
+import {
+  X,
+  Folder,
+  CheckCircle,
+  Loader2,
+  AlertCircle,
+} from 'lucide-react';
+import { intakeApi } from '../../api/intake';
+import { TopicInfo, InboxStudyDetail } from '../../types/intake';
+
+interface FinalizeModalProps {
+  studyName: string;
+  topics: TopicInfo[];
+  onClose: () => void;
+  onFinalized: (finalPath: string) => void;
+}
+
+export const FinalizeModal: React.FC<FinalizeModalProps> = ({
+  studyName,
+  topics,
+  onClose,
+  onFinalized,
+}) => {
+  const [studyDetail, setStudyDetail] = useState<InboxStudyDetail | null>(null);
+  const [selectedTopic, setSelectedTopic] = useState('');
+  const [newTopic, setNewTopic] = useState('');
+  const [runBaseline, setRunBaseline] = useState(true);
+  const [isLoading, setIsLoading] = useState(true);
+  const [isFinalizing, setIsFinalizing] = useState(false);
+  const [progress, setProgress] = useState<string>('');
+  const [error, setError] = useState<string | null>(null);
+
+  // Load study detail
+  useEffect(() => {
+    const loadStudy = async () => {
+      try {
+        const detail = await intakeApi.getInboxStudy(studyName);
+        setStudyDetail(detail);
+        // Pre-select topic if set in spec
+        if (detail.spec.meta.topic) {
+          setSelectedTopic(detail.spec.meta.topic);
+        }
+      } catch (err) {
+        setError(err instanceof Error ? err.message : 'Failed to load study');
+      } finally {
+        setIsLoading(false);
+      }
+    };
+    loadStudy();
+  }, [studyName]);
+
+  const handleFinalize = async () => {
+    const topic = newTopic.trim() || selectedTopic;
+    if (!topic) {
+      setError('Please select or create a topic folder');
+      return;
+    }
+
+    setIsFinalizing(true);
+    setError(null);
+    setProgress('Starting finalization...');
+
+    try {
+      setProgress('Validating study configuration...');
+      await new Promise((r) => setTimeout(r, 500)); // Visual feedback
+
+      if (runBaseline) {
+        setProgress('Running baseline FEA solve...');
+      }
+
+      const result = await intakeApi.finalize(studyName, {
+        topic,
+        run_baseline: runBaseline,
+      });
+
+      setProgress('Finalization complete!');
+      await new Promise((r) => setTimeout(r, 500));
+
+      onFinalized(result.final_path);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Finalization failed');
+      setIsFinalizing(false);
+    }
+  };
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center bg-dark-900/80 backdrop-blur-sm">
+      <div className="w-full max-w-lg glass-strong rounded-xl border border-primary-400/20 overflow-hidden">
+        {/* Header */}
+        <div className="px-6 py-4 border-b border-primary-400/10 flex items-center justify-between">
+          <div className="flex items-center gap-3">
+            <div className="w-10 h-10 rounded-lg bg-primary-400/10 flex items-center justify-center">
+              <Folder className="w-5 h-5 text-primary-400" />
+            </div>
+            <div>
+              <h3 className="text-lg font-semibold text-white">Finalize Study</h3>
+              <p className="text-sm text-dark-400">{studyName}</p>
+            </div>
+          </div>
+          {!isFinalizing && (
+            <button
+              onClick={onClose}
+              className="p-2 hover:bg-white/5 rounded-lg transition-colors text-dark-400 hover:text-white"
+            >
+              <X className="w-5 h-5" />
+            </button>
+          )}
+        </div>
+
+        {/* Content */}
+        <div className="p-6 space-y-6">
+          {isLoading ? (
+            <div className="flex items-center justify-center py-8">
+              <Loader2 className="w-6 h-6 animate-spin text-primary-400" />
+            </div>
+          ) : isFinalizing ? (
+            /* Progress View */
+            <div className="text-center py-8 space-y-4">
+              <Loader2 className="w-12 h-12 animate-spin text-primary-400 mx-auto" />
+              <p className="text-white font-medium">{progress}</p>
+              <p className="text-sm text-dark-400">
+                Please wait while your study is being finalized...
+              </p>
+            </div>
+          ) : (
+            <>
+              {/* Error Display */}
+              {error && (
+                <div className="p-3 rounded-lg bg-red-500/10 border border-red-500/30 text-red-400 text-sm flex items-center gap-2">
+                  <AlertCircle className="w-4 h-4 flex-shrink-0" />
+                  {error}
+                </div>
+              )}
+
+              {/* Study Summary */}
+              {studyDetail && (
+                <div className="p-4 rounded-lg bg-dark-800 space-y-2">
+                  <h4 className="text-sm font-medium text-dark-300">Study Summary</h4>
+                  <div className="grid grid-cols-2 gap-4 text-sm">
+                    <div>
+                      <span className="text-dark-500">Status:</span>
+                      <span className="ml-2 text-white capitalize">
+                        {studyDetail.spec.meta.status}
+                      </span>
+                    </div>
+                    <div>
+                      <span className="text-dark-500">Model Files:</span>
+                      <span className="ml-2 text-white">
+                        {studyDetail.files.sim.length + studyDetail.files.prt.length + studyDetail.files.fem.length}
+                      </span>
+                    </div>
+                    <div>
+                      <span className="text-dark-500">Design Variables:</span>
+                      <span className="ml-2 text-white">
+                        {studyDetail.spec.design_variables?.length || 0}
+                      </span>
+                    </div>
+                    <div>
+                      <span className="text-dark-500">Objectives:</span>
+                      <span className="ml-2 text-white">
+                        {studyDetail.spec.objectives?.length || 0}
+                      </span>
+                    </div>
+                  </div>
+                </div>
+              )}
+
+              {/* Topic Selection */}
+              <div>
+                <label className="block text-sm font-medium text-dark-300 mb-2">
+                  Topic Folder <span className="text-red-400">*</span>
+                </label>
+                <div className="flex gap-2">
+                  <select
+                    value={selectedTopic}
+                    onChange={(e) => {
+                      setSelectedTopic(e.target.value);
+                      setNewTopic('');
+                    }}
+                    className="flex-1 px-4 py-2.5 rounded-lg bg-dark-800 border border-dark-600 
+                               text-white focus:border-primary-400 focus:outline-none 
+                               focus:ring-1 focus:ring-primary-400/50"
+                  >
+                    <option value="">Select existing topic...</option>
+                    {topics.map((topic) => (
+                      <option key={topic.name} value={topic.name}>
+                        {topic.name} ({topic.study_count} studies)
+                      </option>
+                    ))}
+                  </select>
+                  <span className="text-dark-500 self-center">or</span>
+                  <input
+                    type="text"
+                    value={newTopic}
+                    onChange={(e) => {
+                      setNewTopic(e.target.value.replace(/[^A-Za-z0-9_]/g, '_'));
+                      setSelectedTopic('');
+                    }}
+                    placeholder="New_Topic"
+                    className="flex-1 px-4 py-2.5 rounded-lg bg-dark-800 border border-dark-600 
+                               text-white placeholder-dark-500 focus:border-primary-400 
+                               focus:outline-none focus:ring-1 focus:ring-primary-400/50"
+                  />
+                </div>
+                <p className="mt-1 text-xs text-dark-500">
+                  Study will be created at: studies/{newTopic || selectedTopic || '<topic>'}/{studyName}/
+                </p>
+              </div>
+
+              {/* Baseline Option */}
+              <div>
+                <label className="flex items-center gap-3 cursor-pointer">
+                  <input
+                    type="checkbox"
+                    checked={runBaseline}
+                    onChange={(e) => setRunBaseline(e.target.checked)}
+                    className="w-4 h-4 rounded border-dark-600 bg-dark-800 text-primary-400 
+                               focus:ring-primary-400/50"
+                  />
+                  <div>
+                    <span className="text-white font-medium">Run baseline FEA solve</span>
+                    <p className="text-xs text-dark-500">
+                      Validates the model and captures baseline performance metrics
+                    </p>
+                  </div>
+                </label>
+              </div>
+            </>
+          )}
+        </div>
+
+        {/* Footer */}
+        {!isLoading && !isFinalizing && (
+          <div className="px-6 py-4 border-t border-primary-400/10 flex justify-end gap-3">
+            <button
+              onClick={onClose}
+              className="px-4 py-2 rounded-lg border border-dark-600 text-dark-300 
+                         hover:border-dark-500 hover:text-white transition-colors"
+            >
+              Cancel
+            </button>
+            <button
+              onClick={handleFinalize}
+              disabled={!selectedTopic && !newTopic.trim()}
+              className="px-6 py-2 rounded-lg font-medium transition-all disabled:opacity-50
+                         flex items-center gap-2"
+              style={{
+                background: 'linear-gradient(135deg, #00d4e6 0%, #0891b2 100%)',
+                color: '#000',
+              }}
+            >
+              <CheckCircle className="w-4 h-4" />
+              Finalize Study
+            </button>
+          </div>
+        )}
+      </div>
+    </div>
+  );
+};
+
+export default FinalizeModal;

atomizer-dashboard/frontend/src/components/intake/InboxSection.tsx

@@ -0,0 +1,147 @@
+/**
+ * InboxSection - Section displaying inbox studies on Home page
+ *
+ * Shows the "Create New Study" card and lists all inbox studies
+ * with their current status and available actions.
+ */
+
+import React, { useState, useEffect, useCallback } from 'react';
+import { Inbox, RefreshCw, ChevronDown, ChevronRight } from 'lucide-react';
+import { intakeApi } from '../../api/intake';
+import { InboxStudy, TopicInfo } from '../../types/intake';
+import { CreateStudyCard } from './CreateStudyCard';
+import { InboxStudyCard } from './InboxStudyCard';
+import { FinalizeModal } from './FinalizeModal';
+
+interface InboxSectionProps {
+  onStudyFinalized?: () => void;
+}
+
+export const InboxSection: React.FC<InboxSectionProps> = ({ onStudyFinalized }) => {
+  const [inboxStudies, setInboxStudies] = useState<InboxStudy[]>([]);
+  const [topics, setTopics] = useState<TopicInfo[]>([]);
+  const [isLoading, setIsLoading] = useState(true);
+  const [isExpanded, setIsExpanded] = useState(true);
+  const [selectedStudyForFinalize, setSelectedStudyForFinalize] = useState<string | null>(null);
+
+  const loadData = useCallback(async () => {
+    setIsLoading(true);
+    try {
+      const [inboxResponse, topicsResponse] = await Promise.all([
+        intakeApi.listInbox(),
+        intakeApi.listTopics(),
+      ]);
+      setInboxStudies(inboxResponse.studies);
+      setTopics(topicsResponse.topics);
+    } catch (err) {
+      console.error('Failed to load inbox data:', err);
+    } finally {
+      setIsLoading(false);
+    }
+  }, []);
+
+  useEffect(() => {
+    loadData();
+  }, [loadData]);
+
+  const handleStudyCreated = (_studyName: string) => {
+    loadData();
+  };
+
+  const handleStudyFinalized = (_finalPath: string) => {
+    setSelectedStudyForFinalize(null);
+    loadData();
+    onStudyFinalized?.();
+  };
+
+  const pendingStudies = inboxStudies.filter(
+    (s) => !['ready', 'running', 'completed'].includes(s.status)
+  );
+
+  return (
+    <div className="space-y-4">
+      {/* Section Header */}
+      <button
+        onClick={() => setIsExpanded(!isExpanded)}
+        className="w-full flex items-center justify-between px-2 py-1 hover:bg-white/5 rounded-lg transition-colors"
+      >
+        <div className="flex items-center gap-3">
+          <div className="w-8 h-8 rounded-lg bg-primary-400/10 flex items-center justify-center">
+            <Inbox className="w-4 h-4 text-primary-400" />
+          </div>
+          <div className="text-left">
+            <h2 className="text-lg font-semibold text-white">Study Inbox</h2>
+            <p className="text-sm text-dark-400">
+              {pendingStudies.length} pending studies
+            </p>
+          </div>
+        </div>
+        <div className="flex items-center gap-2">
+          <button
+            onClick={(e) => {
+              e.stopPropagation();
+              loadData();
+            }}
+            className="p-2 hover:bg-white/5 rounded-lg transition-colors text-dark-400 hover:text-primary-400"
+            title="Refresh"
+          >
+            <RefreshCw className={`w-4 h-4 ${isLoading ? 'animate-spin' : ''}`} />
+          </button>
+          {isExpanded ? (
+            <ChevronDown className="w-5 h-5 text-dark-400" />
+          ) : (
+            <ChevronRight className="w-5 h-5 text-dark-400" />
+          )}
+        </div>
+      </button>
+
+      {/* Content */}
+      {isExpanded && (
+        <div className="space-y-4">
+          {/* Create Study Card */}
+          <CreateStudyCard topics={topics} onStudyCreated={handleStudyCreated} />
+
+          {/* Inbox Studies List */}
+          {inboxStudies.length > 0 && (
+            <div className="space-y-3">
+              <h3 className="text-sm font-medium text-dark-400 px-2">
+                Inbox Studies ({inboxStudies.length})
+              </h3>
+              {inboxStudies.map((study) => (
+                <InboxStudyCard
+                  key={study.study_name}
+                  study={study}
+                  onRefresh={loadData}
+                  onSelect={setSelectedStudyForFinalize}
+                />
+              ))}
+            </div>
+          )}
+
+          {/* Empty State */}
+          {!isLoading && inboxStudies.length === 0 && (
+            <div className="text-center py-8 text-dark-400">
+              <Inbox className="w-12 h-12 mx-auto mb-3 opacity-30" />
+              <p>No studies in inbox</p>
+              <p className="text-sm text-dark-500">
+                Create a new study to get started
+              </p>
+            </div>
+          )}
+        </div>
+      )}
+
+      {/* Finalize Modal */}
+      {selectedStudyForFinalize && (
+        <FinalizeModal
+          studyName={selectedStudyForFinalize}
+          topics={topics}
+          onClose={() => setSelectedStudyForFinalize(null)}
+          onFinalized={handleStudyFinalized}
+        />
+      )}
+    </div>
+  );
+};
+
+export default InboxSection;

atomizer-dashboard/frontend/src/components/intake/InboxStudyCard.tsx

@@ -0,0 +1,455 @@
+/**
+ * InboxStudyCard - Card displaying an inbox study with actions
+ *
+ * Shows study status, files, and provides actions for:
+ * - Running introspection
+ * - Generating README
+ * - Finalizing the study
+ */
+
+import React, { useState, useEffect } from 'react';
+import {
+  FileText,
+  Folder,
+  Trash2,
+  Play,
+  CheckCircle,
+  Clock,
+  AlertCircle,
+  Loader2,
+  ChevronDown,
+  ChevronRight,
+  Sparkles,
+  ArrowRight,
+  Eye,
+  Save,
+} from 'lucide-react';
+import { InboxStudy, SpecStatus, ExpressionInfo, InboxStudyDetail } from '../../types/intake';
+import { intakeApi } from '../../api/intake';
+import { FileDropzone } from './FileDropzone';
+import { ContextFileUpload } from './ContextFileUpload';
+import { ExpressionList } from './ExpressionList';
+
+interface InboxStudyCardProps {
+  study: InboxStudy;
+  onRefresh: () => void;
+  onSelect: (studyName: string) => void;
+}
+
+const statusConfig: Record<SpecStatus, { icon: React.ReactNode; color: string; label: string }> = {
+  draft: {
+    icon: <Clock className="w-4 h-4" />,
+    color: 'text-dark-400 bg-dark-600',
+    label: 'Draft',
+  },
+  introspected: {
+    icon: <CheckCircle className="w-4 h-4" />,
+    color: 'text-blue-400 bg-blue-500/10',
+    label: 'Introspected',
+  },
+  configured: {
+    icon: <CheckCircle className="w-4 h-4" />,
+    color: 'text-green-400 bg-green-500/10',
+    label: 'Configured',
+  },
+  validated: {
+    icon: <CheckCircle className="w-4 h-4" />,
+    color: 'text-green-400 bg-green-500/10',
+    label: 'Validated',
+  },
+  ready: {
+    icon: <CheckCircle className="w-4 h-4" />,
+    color: 'text-primary-400 bg-primary-500/10',
+    label: 'Ready',
+  },
+  running: {
+    icon: <Play className="w-4 h-4" />,
+    color: 'text-yellow-400 bg-yellow-500/10',
+    label: 'Running',
+  },
+  completed: {
+    icon: <CheckCircle className="w-4 h-4" />,
+    color: 'text-green-400 bg-green-500/10',
+    label: 'Completed',
+  },
+  failed: {
+    icon: <AlertCircle className="w-4 h-4" />,
+    color: 'text-red-400 bg-red-500/10',
+    label: 'Failed',
+  },
+};
+
+export const InboxStudyCard: React.FC<InboxStudyCardProps> = ({
+  study,
+  onRefresh,
+  onSelect,
+}) => {
+  const [isExpanded, setIsExpanded] = useState(false);
+  const [isIntrospecting, setIsIntrospecting] = useState(false);
+  const [isGeneratingReadme, setIsGeneratingReadme] = useState(false);
+  const [isDeleting, setIsDeleting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  
+  // Introspection data (fetched when expanded)
+  const [studyDetail, setStudyDetail] = useState<InboxStudyDetail | null>(null);
+  const [isLoadingDetail, setIsLoadingDetail] = useState(false);
+  const [selectedExpressions, setSelectedExpressions] = useState<string[]>([]);
+  const [showReadme, setShowReadme] = useState(false);
+  const [readmeContent, setReadmeContent] = useState<string | null>(null);
+  const [isSavingDVs, setIsSavingDVs] = useState(false);
+  const [dvSaveMessage, setDvSaveMessage] = useState<string | null>(null);
+
+  const status = statusConfig[study.status] || statusConfig.draft;
+  
+  // Fetch study details when expanded for the first time
+  useEffect(() => {
+    if (isExpanded && !studyDetail && !isLoadingDetail) {
+      loadStudyDetail();
+    }
+  }, [isExpanded]);
+  
+  const loadStudyDetail = async () => {
+    setIsLoadingDetail(true);
+    try {
+      const detail = await intakeApi.getInboxStudy(study.study_name);
+      setStudyDetail(detail);
+      
+      // Auto-select candidate expressions
+      const introspection = detail.spec?.model?.introspection;
+      if (introspection?.expressions) {
+        const candidates = introspection.expressions
+          .filter((e: ExpressionInfo) => e.is_candidate)
+          .map((e: ExpressionInfo) => e.name);
+        setSelectedExpressions(candidates);
+      }
+    } catch (err) {
+      console.error('Failed to load study detail:', err);
+    } finally {
+      setIsLoadingDetail(false);
+    }
+  };
+
+  const handleIntrospect = async () => {
+    setIsIntrospecting(true);
+    setError(null);
+    try {
+      await intakeApi.introspect({ study_name: study.study_name });
+      // Reload study detail to get new introspection data
+      await loadStudyDetail();
+      onRefresh();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Introspection failed');
+    } finally {
+      setIsIntrospecting(false);
+    }
+  };
+
+  const handleGenerateReadme = async () => {
+    setIsGeneratingReadme(true);
+    setError(null);
+    try {
+      const response = await intakeApi.generateReadme(study.study_name);
+      setReadmeContent(response.content);
+      setShowReadme(true);
+      onRefresh();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'README generation failed');
+    } finally {
+      setIsGeneratingReadme(false);
+    }
+  };
+
+  const handleDelete = async () => {
+    if (!confirm(`Delete inbox study "${study.study_name}"? This cannot be undone.`)) {
+      return;
+    }
+    setIsDeleting(true);
+    try {
+      await intakeApi.deleteInboxStudy(study.study_name);
+      onRefresh();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Delete failed');
+      setIsDeleting(false);
+    }
+  };
+
+  const handleSaveDesignVariables = async () => {
+    if (selectedExpressions.length === 0) {
+      setError('Please select at least one expression to use as a design variable');
+      return;
+    }
+    
+    setIsSavingDVs(true);
+    setError(null);
+    setDvSaveMessage(null);
+    
+    try {
+      const result = await intakeApi.createDesignVariables(study.study_name, selectedExpressions);
+      setDvSaveMessage(`Created ${result.total_created} design variable(s)`);
+      // Reload study detail to see updated spec
+      await loadStudyDetail();
+      onRefresh();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to save design variables');
+    } finally {
+      setIsSavingDVs(false);
+    }
+  };
+
+  const canIntrospect = study.status === 'draft' && study.model_files.length > 0;
+  const canGenerateReadme = study.status === 'introspected';
+  const canFinalize = ['introspected', 'configured'].includes(study.status);
+  const canSaveDVs = study.status === 'introspected' && selectedExpressions.length > 0;
+
+  return (
+    <div className="glass rounded-xl border border-primary-400/10 overflow-hidden">
+      {/* Header - Always visible */}
+      <button
+        onClick={() => setIsExpanded(!isExpanded)}
+        className="w-full px-4 py-3 flex items-center justify-between hover:bg-white/5 transition-colors"
+      >
+        <div className="flex items-center gap-3">
+          <div className="w-10 h-10 rounded-lg bg-dark-700 flex items-center justify-center">
+            <Folder className="w-5 h-5 text-primary-400" />
+          </div>
+          <div className="text-left">
+            <h4 className="text-white font-medium">{study.study_name}</h4>
+            {study.description && (
+              <p className="text-sm text-dark-400 truncate max-w-[300px]">
+                {study.description}
+              </p>
+            )}
+          </div>
+        </div>
+        <div className="flex items-center gap-3">
+          {/* Status Badge */}
+          <span className={`inline-flex items-center gap-1.5 px-2.5 py-1 rounded-full text-xs font-medium ${status.color}`}>
+            {status.icon}
+            {status.label}
+          </span>
+          {/* File Count */}
+          <span className="text-dark-500 text-sm">
+            {study.model_files.length} files
+          </span>
+          {/* Expand Icon */}
+          {isExpanded ? (
+            <ChevronDown className="w-4 h-4 text-dark-400" />
+          ) : (
+            <ChevronRight className="w-4 h-4 text-dark-400" />
+          )}
+        </div>
+      </button>
+
+      {/* Expanded Content */}
+      {isExpanded && (
+        <div className="px-4 pb-4 space-y-4 border-t border-primary-400/10 pt-4">
+          {/* Error Display */}
+          {error && (
+            <div className="p-3 rounded-lg bg-red-500/10 border border-red-500/30 text-red-400 text-sm flex items-center gap-2">
+              <AlertCircle className="w-4 h-4 flex-shrink-0" />
+              {error}
+            </div>
+          )}
+
+          {/* Success Message */}
+          {dvSaveMessage && (
+            <div className="p-3 rounded-lg bg-green-500/10 border border-green-500/30 text-green-400 text-sm flex items-center gap-2">
+              <CheckCircle className="w-4 h-4 flex-shrink-0" />
+              {dvSaveMessage}
+            </div>
+          )}
+
+          {/* Files Section */}
+          {study.model_files.length > 0 && (
+            <div>
+              <h5 className="text-sm font-medium text-dark-300 mb-2">Model Files</h5>
+              <div className="flex flex-wrap gap-2">
+                {study.model_files.map((file) => (
+                  <span
+                    key={file}
+                    className="inline-flex items-center gap-1.5 px-2 py-1 rounded bg-dark-700 text-dark-300 text-xs"
+                  >
+                    <FileText className="w-3 h-3" />
+                    {file}
+                  </span>
+                ))}
+              </div>
+            </div>
+          )}
+
+          {/* Model File Upload Section */}
+          <div>
+            <h5 className="text-sm font-medium text-dark-300 mb-2">Upload Model Files</h5>
+            <FileDropzone 
+              studyName={study.study_name} 
+              onUploadComplete={onRefresh}
+              compact={true}
+            />
+          </div>
+
+          {/* Context File Upload Section */}
+          <ContextFileUpload 
+            studyName={study.study_name} 
+            onUploadComplete={onRefresh}
+          />
+
+          {/* Introspection Results - Expressions */}
+          {isLoadingDetail && (
+            <div className="flex items-center gap-2 text-dark-400 text-sm py-4">
+              <Loader2 className="w-4 h-4 animate-spin" />
+              Loading introspection data...
+            </div>
+          )}
+          
+          {studyDetail?.spec?.model?.introspection?.expressions && 
+           studyDetail.spec.model.introspection.expressions.length > 0 && (
+            <ExpressionList
+              expressions={studyDetail.spec.model.introspection.expressions}
+              massKg={studyDetail.spec.model.introspection.mass_kg}
+              selectedExpressions={selectedExpressions}
+              onSelectionChange={setSelectedExpressions}
+              readOnly={study.status === 'configured'}
+              compact={true}
+            />
+          )}
+
+          {/* README Preview Section */}
+          {(readmeContent || study.status === 'configured') && (
+            <div className="space-y-2">
+              <div className="flex items-center justify-between">
+                <h5 className="text-sm font-medium text-dark-300 flex items-center gap-2">
+                  <FileText className="w-4 h-4" />
+                  README.md
+                </h5>
+                <button
+                  onClick={() => setShowReadme(!showReadme)}
+                  className="flex items-center gap-1 px-2 py-1 text-xs rounded bg-dark-600 
+                             text-dark-300 hover:bg-dark-500 transition-colors"
+                >
+                  <Eye className="w-3 h-3" />
+                  {showReadme ? 'Hide' : 'Preview'}
+                </button>
+              </div>
+              {showReadme && readmeContent && (
+                <div className="max-h-64 overflow-y-auto rounded-lg border border-dark-600 
+                                bg-dark-800 p-4">
+                  <pre className="text-xs text-dark-300 whitespace-pre-wrap font-mono">
+                    {readmeContent}
+                  </pre>
+                </div>
+              )}
+            </div>
+          )}
+
+          {/* No Files Warning */}
+          {study.model_files.length === 0 && (
+            <div className="p-3 rounded-lg bg-yellow-500/10 border border-yellow-500/30 text-yellow-400 text-sm flex items-center gap-2">
+              <AlertCircle className="w-4 h-4 flex-shrink-0" />
+              No model files found. Upload .prt, .sim, or .fem files to continue.
+            </div>
+          )}
+
+          {/* Actions */}
+          <div className="flex flex-wrap gap-2">
+            {/* Introspect */}
+            {canIntrospect && (
+              <button
+                onClick={handleIntrospect}
+                disabled={isIntrospecting}
+                className="flex items-center gap-2 px-3 py-1.5 rounded-lg text-sm font-medium
+                           bg-blue-500/10 text-blue-400 hover:bg-blue-500/20 
+                           disabled:opacity-50 transition-colors"
+              >
+                {isIntrospecting ? (
+                  <Loader2 className="w-4 h-4 animate-spin" />
+                ) : (
+                  <Play className="w-4 h-4" />
+                )}
+                Introspect Model
+              </button>
+            )}
+
+            {/* Save Design Variables */}
+            {canSaveDVs && (
+              <button
+                onClick={handleSaveDesignVariables}
+                disabled={isSavingDVs}
+                className="flex items-center gap-2 px-3 py-1.5 rounded-lg text-sm font-medium
+                           bg-green-500/10 text-green-400 hover:bg-green-500/20 
+                           disabled:opacity-50 transition-colors"
+              >
+                {isSavingDVs ? (
+                  <Loader2 className="w-4 h-4 animate-spin" />
+                ) : (
+                  <Save className="w-4 h-4" />
+                )}
+                Save as DVs ({selectedExpressions.length})
+              </button>
+            )}
+
+            {/* Generate README */}
+            {canGenerateReadme && (
+              <button
+                onClick={handleGenerateReadme}
+                disabled={isGeneratingReadme}
+                className="flex items-center gap-2 px-3 py-1.5 rounded-lg text-sm font-medium
+                           bg-purple-500/10 text-purple-400 hover:bg-purple-500/20 
+                           disabled:opacity-50 transition-colors"
+              >
+                {isGeneratingReadme ? (
+                  <Loader2 className="w-4 h-4 animate-spin" />
+                ) : (
+                  <Sparkles className="w-4 h-4" />
+                )}
+                Generate README
+              </button>
+            )}
+
+            {/* Finalize */}
+            {canFinalize && (
+              <button
+                onClick={() => onSelect(study.study_name)}
+                className="flex items-center gap-2 px-3 py-1.5 rounded-lg text-sm font-medium
+                           bg-primary-500/10 text-primary-400 hover:bg-primary-500/20 
+                           transition-colors"
+              >
+                <ArrowRight className="w-4 h-4" />
+                Finalize Study
+              </button>
+            )}
+
+            {/* Delete */}
+            <button
+              onClick={handleDelete}
+              disabled={isDeleting}
+              className="flex items-center gap-2 px-3 py-1.5 rounded-lg text-sm font-medium
+                         bg-red-500/10 text-red-400 hover:bg-red-500/20 
+                         disabled:opacity-50 transition-colors ml-auto"
+            >
+              {isDeleting ? (
+                <Loader2 className="w-4 h-4 animate-spin" />
+              ) : (
+                <Trash2 className="w-4 h-4" />
+              )}
+              Delete
+            </button>
+          </div>
+
+          {/* Workflow Hint */}
+          {study.status === 'draft' && study.model_files.length > 0 && (
+            <p className="text-xs text-dark-500">
+              Next step: Run introspection to discover expressions and model properties.
+            </p>
+          )}
+          {study.status === 'introspected' && (
+            <p className="text-xs text-dark-500">
+              Next step: Generate README with Claude AI, then finalize to create the study.
+            </p>
+          )}
+        </div>
+      )}
+    </div>
+  );
+};
+
+export default InboxStudyCard;

atomizer-dashboard/frontend/src/components/intake/index.ts

@@ -0,0 +1,13 @@
+/**
+ * Intake Components Index
+ *
+ * Export all intake workflow components.
+ */
+
+export { CreateStudyCard } from './CreateStudyCard';
+export { InboxStudyCard } from './InboxStudyCard';
+export { FinalizeModal } from './FinalizeModal';
+export { InboxSection } from './InboxSection';
+export { FileDropzone } from './FileDropzone';
+export { ContextFileUpload } from './ContextFileUpload';
+export { ExpressionList } from './ExpressionList';

atomizer-dashboard/frontend/src/components/plotly/PlotlyConvergencePlot.tsx

@@ -1,260 +0,0 @@
-/**
- * PlotlyConvergencePlot - Interactive convergence plot using Plotly
- *
- * Features:
- * - Line plot showing objective vs trial number
- * - Best-so-far trace overlay
- * - FEA vs NN trial differentiation
- * - Hover tooltips with trial details
- * - Range slider for zooming
- * - Log scale toggle
- * - Export to PNG/SVG
- */
-
-import { useMemo, useState } from 'react';
-import Plot from 'react-plotly.js';
-
-interface Trial {
-  trial_number: number;
-  values: number[];
-  params: Record<string, number>;
-  user_attrs?: Record<string, any>;
-  source?: 'FEA' | 'NN' | 'V10_FEA';
-  constraint_satisfied?: boolean;
-}
-
-// Penalty threshold - objectives above this are considered failed/penalty trials
-const PENALTY_THRESHOLD = 100000;
-
-interface PlotlyConvergencePlotProps {
-  trials: Trial[];
-  objectiveIndex?: number;
-  objectiveName?: string;
-  direction?: 'minimize' | 'maximize';
-  height?: number;
-  showRangeSlider?: boolean;
-  showLogScaleToggle?: boolean;
-}
-
-export function PlotlyConvergencePlot({
-  trials,
-  objectiveIndex = 0,
-  objectiveName = 'Objective',
-  direction = 'minimize',
-  height = 400,
-  showRangeSlider = true,
-  showLogScaleToggle = true
-}: PlotlyConvergencePlotProps) {
-  const [useLogScale, setUseLogScale] = useState(false);
-
-  // Process trials and calculate best-so-far
-  const { feaData, nnData, bestSoFar, allX, allY } = useMemo(() => {
-    if (!trials.length) return { feaData: { x: [], y: [], text: [] }, nnData: { x: [], y: [], text: [] }, bestSoFar: { x: [], y: [] }, allX: [], allY: [] };
-
-    // Sort by trial number
-    const sorted = [...trials].sort((a, b) => a.trial_number - b.trial_number);
-
-    const fea: { x: number[]; y: number[]; text: string[] } = { x: [], y: [], text: [] };
-    const nn: { x: number[]; y: number[]; text: string[] } = { x: [], y: [], text: [] };
-    const best: { x: number[]; y: number[] } = { x: [], y: [] };
-    const xs: number[] = [];
-    const ys: number[] = [];
-
-    let bestValue = direction === 'minimize' ? Infinity : -Infinity;
-
-    sorted.forEach(t => {
-      const val = t.values?.[objectiveIndex] ?? t.user_attrs?.[objectiveName] ?? null;
-      if (val === null || !isFinite(val)) return;
-
-      // Filter out failed/penalty trials:
-      // 1. Objective above penalty threshold (e.g., 1000000 = solver failure)
-      // 2. constraint_satisfied explicitly false
-      // 3. user_attrs indicates pruned/failed
-      const isPenalty = val >= PENALTY_THRESHOLD;
-      const isFailed = t.constraint_satisfied === false;
-      const isPruned = t.user_attrs?.pruned === true || t.user_attrs?.fail_reason;
-      if (isPenalty || isFailed || isPruned) return;
-
-      const source = t.source || t.user_attrs?.source || 'FEA';
-      const hoverText = `Trial #${t.trial_number}<br>${objectiveName}: ${val.toFixed(4)}<br>Source: ${source}`;
-
-      xs.push(t.trial_number);
-      ys.push(val);
-
-      if (source === 'NN') {
-        nn.x.push(t.trial_number);
-        nn.y.push(val);
-        nn.text.push(hoverText);
-      } else {
-        fea.x.push(t.trial_number);
-        fea.y.push(val);
-        fea.text.push(hoverText);
-      }
-
-      // Update best-so-far
-      if (direction === 'minimize') {
-        if (val < bestValue) bestValue = val;
-      } else {
-        if (val > bestValue) bestValue = val;
-      }
-      best.x.push(t.trial_number);
-      best.y.push(bestValue);
-    });
-
-    return { feaData: fea, nnData: nn, bestSoFar: best, allX: xs, allY: ys };
-  }, [trials, objectiveIndex, objectiveName, direction]);
-
-  if (!trials.length || allX.length === 0) {
-    return (
-      <div className="flex items-center justify-center h-64 text-gray-500">
-        No trial data available
-      </div>
-    );
-  }
-
-  const traces: any[] = [];
-
-  // FEA trials scatter
-  if (feaData.x.length > 0) {
-    traces.push({
-      type: 'scatter',
-      mode: 'markers',
-      name: `FEA (${feaData.x.length})`,
-      x: feaData.x,
-      y: feaData.y,
-      text: feaData.text,
-      hoverinfo: 'text',
-      marker: {
-        color: '#3B82F6',
-        size: 8,
-        opacity: 0.7,
-        line: { color: '#1E40AF', width: 1 }
-      }
-    });
-  }
-
-  // NN trials scatter
-  if (nnData.x.length > 0) {
-    traces.push({
-      type: 'scatter',
-      mode: 'markers',
-      name: `NN (${nnData.x.length})`,
-      x: nnData.x,
-      y: nnData.y,
-      text: nnData.text,
-      hoverinfo: 'text',
-      marker: {
-        color: '#F97316',
-        size: 6,
-        symbol: 'cross',
-        opacity: 0.6
-      }
-    });
-  }
-
-  // Best-so-far line
-  if (bestSoFar.x.length > 0) {
-    traces.push({
-      type: 'scatter',
-      mode: 'lines',
-      name: 'Best So Far',
-      x: bestSoFar.x,
-      y: bestSoFar.y,
-      line: {
-        color: '#10B981',
-        width: 3,
-        shape: 'hv'  // Step line
-      },
-      hoverinfo: 'y'
-    });
-  }
-
-  const layout: any = {
-    height,
-    margin: { l: 60, r: 30, t: 30, b: showRangeSlider ? 80 : 50 },
-    paper_bgcolor: 'rgba(0,0,0,0)',
-    plot_bgcolor: 'rgba(0,0,0,0)',
-    xaxis: {
-      title: 'Trial Number',
-      gridcolor: '#E5E7EB',
-      zerolinecolor: '#D1D5DB',
-      rangeslider: showRangeSlider ? { visible: true } : undefined
-    },
-    yaxis: {
-      title: useLogScale ? `log₁₀(${objectiveName})` : objectiveName,
-      gridcolor: '#E5E7EB',
-      zerolinecolor: '#D1D5DB',
-      type: useLogScale ? 'log' : 'linear'
-    },
-    legend: {
-      x: 1,
-      y: 1,
-      xanchor: 'right',
-      bgcolor: 'rgba(255,255,255,0.8)',
-      bordercolor: '#E5E7EB',
-      borderwidth: 1
-    },
-    font: { family: 'Inter, system-ui, sans-serif' },
-    hovermode: 'closest'
-  };
-
-  // Best value annotation
-  const bestVal = direction === 'minimize'
-    ? Math.min(...allY)
-    : Math.max(...allY);
-  const bestIdx = allY.indexOf(bestVal);
-  const bestTrial = allX[bestIdx];
-
-  return (
-    <div className="w-full">
-      {/* Summary stats and controls */}
-      <div className="flex items-center justify-between mb-3">
-        <div className="flex gap-6 text-sm">
-          <div className="text-gray-600">
-            Best: <span className="font-semibold text-green-600">{bestVal.toFixed(4)}</span>
-            <span className="text-gray-400 ml-1">(Trial #{bestTrial})</span>
-          </div>
-          <div className="text-gray-600">
-            Current: <span className="font-semibold">{allY[allY.length - 1].toFixed(4)}</span>
-          </div>
-          <div className="text-gray-600">
-            Trials: <span className="font-semibold">{allX.length}</span>
-          </div>
-        </div>
-
-        {/* Log scale toggle */}
-        {showLogScaleToggle && (
-          <button
-            onClick={() => setUseLogScale(!useLogScale)}
-            className={`px-3 py-1 text-xs rounded transition-colors ${
-              useLogScale
-                ? 'bg-blue-600 text-white'
-                : 'bg-gray-200 text-gray-700 hover:bg-gray-300'
-            }`}
-            title="Toggle logarithmic scale - better for viewing early improvements"
-          >
-            {useLogScale ? 'Log Scale' : 'Linear Scale'}
-          </button>
-        )}
-      </div>
-
-      <Plot
-        data={traces}
-        layout={layout}
-        config={{
-          displayModeBar: true,
-          displaylogo: false,
-          modeBarButtonsToRemove: ['lasso2d', 'select2d'],
-          toImageButtonOptions: {
-            format: 'png',
-            filename: 'convergence_plot',
-            height: 600,
-            width: 1200,
-            scale: 2
-          }
-        }}
-        style={{ width: '100%' }}
-      />
-    </div>
-  );
-}

atomizer-dashboard/frontend/src/components/plotly/PlotlyCorrelationHeatmap.tsx

@@ -1,161 +0,0 @@
-import { useMemo } from 'react';
-import Plot from 'react-plotly.js';
-
-interface TrialData {
-  trial_number: number;
-  values: number[];
-  params: Record<string, number>;
-}
-
-interface PlotlyCorrelationHeatmapProps {
-  trials: TrialData[];
-  objectiveName?: string;
-  height?: number;
-}
-
-// Calculate Pearson correlation coefficient
-function pearsonCorrelation(x: number[], y: number[]): number {
-  const n = x.length;
-  if (n === 0 || n !== y.length) return 0;
-
-  const meanX = x.reduce((a, b) => a + b, 0) / n;
-  const meanY = y.reduce((a, b) => a + b, 0) / n;
-
-  let numerator = 0;
-  let denomX = 0;
-  let denomY = 0;
-
-  for (let i = 0; i < n; i++) {
-    const dx = x[i] - meanX;
-    const dy = y[i] - meanY;
-    numerator += dx * dy;
-    denomX += dx * dx;
-    denomY += dy * dy;
-  }
-
-  const denominator = Math.sqrt(denomX) * Math.sqrt(denomY);
-  return denominator === 0 ? 0 : numerator / denominator;
-}
-
-export function PlotlyCorrelationHeatmap({
-  trials,
-  objectiveName = 'Objective',
-  height = 500
-}: PlotlyCorrelationHeatmapProps) {
-  const { matrix, labels, annotations } = useMemo(() => {
-    if (trials.length < 3) {
-      return { matrix: [], labels: [], annotations: [] };
-    }
-
-    // Get parameter names
-    const paramNames = Object.keys(trials[0].params);
-    const allLabels = [...paramNames, objectiveName];
-
-    // Extract data columns
-    const columns: Record<string, number[]> = {};
-    paramNames.forEach(name => {
-      columns[name] = trials.map(t => t.params[name]).filter(v => v !== undefined && !isNaN(v));
-    });
-    columns[objectiveName] = trials.map(t => t.values[0]).filter(v => v !== undefined && !isNaN(v));
-
-    // Calculate correlation matrix
-    const n = allLabels.length;
-    const correlationMatrix: number[][] = [];
-    const annotationData: any[] = [];
-
-    for (let i = 0; i < n; i++) {
-      const row: number[] = [];
-      for (let j = 0; j < n; j++) {
-        const col1 = columns[allLabels[i]];
-        const col2 = columns[allLabels[j]];
-
-        // Ensure same length
-        const minLen = Math.min(col1.length, col2.length);
-        const corr = pearsonCorrelation(col1.slice(0, minLen), col2.slice(0, minLen));
-        row.push(corr);
-
-        // Add annotation
-        annotationData.push({
-          x: allLabels[j],
-          y: allLabels[i],
-          text: corr.toFixed(2),
-          showarrow: false,
-          font: {
-            color: Math.abs(corr) > 0.5 ? '#fff' : '#888',
-            size: 11
-          }
-        });
-      }
-      correlationMatrix.push(row);
-    }
-
-    return {
-      matrix: correlationMatrix,
-      labels: allLabels,
-      annotations: annotationData
-    };
-  }, [trials, objectiveName]);
-
-  if (trials.length < 3) {
-    return (
-      <div className="h-64 flex items-center justify-center text-dark-400">
-        <p>Need at least 3 trials to compute correlations</p>
-      </div>
-    );
-  }
-
-  return (
-    <Plot
-      data={[
-        {
-          z: matrix,
-          x: labels,
-          y: labels,
-          type: 'heatmap',
-          colorscale: [
-            [0, '#ef4444'],    // -1: strong negative (red)
-            [0.25, '#f87171'], // -0.5: moderate negative
-            [0.5, '#1a1b26'],  // 0: no correlation (dark)
-            [0.75, '#60a5fa'], // 0.5: moderate positive
-            [1, '#3b82f6']     // 1: strong positive (blue)
-          ],
-          zmin: -1,
-          zmax: 1,
-          showscale: true,
-          colorbar: {
-            title: { text: 'Correlation', font: { color: '#888' } },
-            tickfont: { color: '#888' },
-            len: 0.8
-          },
-          hovertemplate: '%{y} vs %{x}<br>Correlation: %{z:.3f}<extra></extra>'
-        }
-      ]}
-      layout={{
-        title: {
-          text: 'Parameter-Objective Correlation Matrix',
-          font: { color: '#fff', size: 14 }
-        },
-        height,
-        margin: { l: 120, r: 60, t: 60, b: 120 },
-        paper_bgcolor: 'transparent',
-        plot_bgcolor: 'transparent',
-        xaxis: {
-          tickangle: 45,
-          tickfont: { color: '#888', size: 10 },
-          gridcolor: 'rgba(255,255,255,0.05)'
-        },
-        yaxis: {
-          tickfont: { color: '#888', size: 10 },
-          gridcolor: 'rgba(255,255,255,0.05)'
-        },
-        annotations: annotations
-      }}
-      config={{
-        displayModeBar: true,
-        modeBarButtonsToRemove: ['lasso2d', 'select2d'],
-        displaylogo: false
-      }}
-      style={{ width: '100%' }}
-    />
-  );
-}

atomizer-dashboard/frontend/src/components/plotly/PlotlyFeasibilityChart.tsx

@@ -1,120 +0,0 @@
-import { useMemo } from 'react';
-import Plot from 'react-plotly.js';
-
-interface TrialData {
-  trial_number: number;
-  values: number[];
-  constraint_satisfied?: boolean;
-}
-
-interface PlotlyFeasibilityChartProps {
-  trials: TrialData[];
-  height?: number;
-}
-
-export function PlotlyFeasibilityChart({
-  trials,
-  height = 350
-}: PlotlyFeasibilityChartProps) {
-  const { trialNumbers, cumulativeFeasibility, windowedFeasibility } = useMemo(() => {
-    if (trials.length === 0) {
-      return { trialNumbers: [], cumulativeFeasibility: [], windowedFeasibility: [] };
-    }
-
-    // Sort trials by number
-    const sorted = [...trials].sort((a, b) => a.trial_number - b.trial_number);
-
-    const numbers: number[] = [];
-    const cumulative: number[] = [];
-    const windowed: number[] = [];
-
-    let feasibleCount = 0;
-    const windowSize = Math.min(20, Math.floor(sorted.length / 5) || 1);
-
-    sorted.forEach((trial, idx) => {
-      numbers.push(trial.trial_number);
-
-      // Cumulative feasibility
-      if (trial.constraint_satisfied !== false) {
-        feasibleCount++;
-      }
-      cumulative.push((feasibleCount / (idx + 1)) * 100);
-
-      // Windowed (rolling) feasibility
-      const windowStart = Math.max(0, idx - windowSize + 1);
-      const windowTrials = sorted.slice(windowStart, idx + 1);
-      const windowFeasible = windowTrials.filter(t => t.constraint_satisfied !== false).length;
-      windowed.push((windowFeasible / windowTrials.length) * 100);
-    });
-
-    return { trialNumbers: numbers, cumulativeFeasibility: cumulative, windowedFeasibility: windowed };
-  }, [trials]);
-
-  if (trials.length === 0) {
-    return (
-      <div className="h-64 flex items-center justify-center text-dark-400">
-        <p>No trials to display</p>
-      </div>
-    );
-  }
-
-  return (
-    <Plot
-      data={[
-        {
-          x: trialNumbers,
-          y: cumulativeFeasibility,
-          type: 'scatter',
-          mode: 'lines',
-          name: 'Cumulative Feasibility',
-          line: { color: '#22c55e', width: 2 },
-          hovertemplate: 'Trial %{x}<br>Cumulative: %{y:.1f}%<extra></extra>'
-        },
-        {
-          x: trialNumbers,
-          y: windowedFeasibility,
-          type: 'scatter',
-          mode: 'lines',
-          name: 'Rolling (20-trial)',
-          line: { color: '#60a5fa', width: 2, dash: 'dot' },
-          hovertemplate: 'Trial %{x}<br>Rolling: %{y:.1f}%<extra></extra>'
-        }
-      ]}
-      layout={{
-        height,
-        margin: { l: 60, r: 30, t: 30, b: 50 },
-        paper_bgcolor: 'transparent',
-        plot_bgcolor: 'transparent',
-        xaxis: {
-          title: { text: 'Trial Number', font: { color: '#888' } },
-          tickfont: { color: '#888' },
-          gridcolor: 'rgba(255,255,255,0.05)',
-          zeroline: false
-        },
-        yaxis: {
-          title: { text: 'Feasibility Rate (%)', font: { color: '#888' } },
-          tickfont: { color: '#888' },
-          gridcolor: 'rgba(255,255,255,0.1)',
-          zeroline: false,
-          range: [0, 105]
-        },
-        legend: {
-          font: { color: '#888' },
-          bgcolor: 'rgba(0,0,0,0.5)',
-          x: 0.02,
-          y: 0.98,
-          xanchor: 'left',
-          yanchor: 'top'
-        },
-        showlegend: true,
-        hovermode: 'x unified'
-      }}
-      config={{
-        displayModeBar: true,
-        modeBarButtonsToRemove: ['lasso2d', 'select2d'],
-        displaylogo: false
-      }}
-      style={{ width: '100%' }}
-    />
-  );
-}

atomizer-dashboard/frontend/src/components/plotly/PlotlyParallelCoordinates.tsx

@@ -1,221 +0,0 @@
-/**
- * PlotlyParallelCoordinates - Interactive parallel coordinates plot using Plotly
- *
- * Features:
- * - Native zoom, pan, and selection
- * - Hover tooltips with trial details
- * - Brush filtering on each axis
- * - FEA vs NN color differentiation
- * - Export to PNG/SVG
- */
-
-import { useMemo } from 'react';
-import Plot from 'react-plotly.js';
-
-interface Trial {
-  trial_number: number;
-  values: number[];
-  params: Record<string, number>;
-  user_attrs?: Record<string, any>;
-  constraint_satisfied?: boolean;
-  source?: 'FEA' | 'NN' | 'V10_FEA';
-}
-
-interface Objective {
-  name: string;
-  direction?: 'minimize' | 'maximize';
-  unit?: string;
-}
-
-interface DesignVariable {
-  name: string;
-  unit?: string;
-  min?: number;
-  max?: number;
-}
-
-interface PlotlyParallelCoordinatesProps {
-  trials: Trial[];
-  objectives: Objective[];
-  designVariables: DesignVariable[];
-  paretoFront?: Trial[];
-  height?: number;
-}
-
-export function PlotlyParallelCoordinates({
-  trials,
-  objectives,
-  designVariables,
-  paretoFront = [],
-  height = 500
-}: PlotlyParallelCoordinatesProps) {
-  // Create set of Pareto front trial numbers
-  const paretoSet = useMemo(() => new Set(paretoFront.map(t => t.trial_number)), [paretoFront]);
-
-  // Build dimensions array for parallel coordinates
-  const { dimensions, colorValues, colorScale } = useMemo(() => {
-    if (!trials.length) return { dimensions: [], colorValues: [], colorScale: [] };
-
-    const dims: any[] = [];
-    const colors: number[] = [];
-
-    // Get all design variable names
-    const dvNames = designVariables.map(dv => dv.name);
-    const objNames = objectives.map(obj => obj.name);
-
-    // Add design variable dimensions
-    dvNames.forEach((name, idx) => {
-      const dv = designVariables[idx];
-      const values = trials.map(t => t.params[name] ?? 0);
-      const validValues = values.filter(v => v !== null && v !== undefined && isFinite(v));
-
-      if (validValues.length === 0) return;
-
-      dims.push({
-        label: name,
-        values: values,
-        range: [
-          dv?.min ?? Math.min(...validValues),
-          dv?.max ?? Math.max(...validValues)
-        ],
-        constraintrange: undefined
-      });
-    });
-
-    // Add objective dimensions
-    objNames.forEach((name, idx) => {
-      const obj = objectives[idx];
-      const values = trials.map(t => {
-        // Try to get from values array first, then user_attrs
-        if (t.values && t.values[idx] !== undefined) {
-          return t.values[idx];
-        }
-        return t.user_attrs?.[name] ?? 0;
-      });
-      const validValues = values.filter(v => v !== null && v !== undefined && isFinite(v));
-
-      if (validValues.length === 0) return;
-
-      dims.push({
-        label: `${name}${obj.unit ? ` (${obj.unit})` : ''}`,
-        values: values,
-        range: [Math.min(...validValues) * 0.95, Math.max(...validValues) * 1.05]
-      });
-    });
-
-    // Build color array: 0 = V10_FEA, 1 = FEA, 2 = NN, 3 = Pareto
-    trials.forEach(t => {
-      const source = t.source || t.user_attrs?.source || 'FEA';
-      const isPareto = paretoSet.has(t.trial_number);
-
-      if (isPareto) {
-        colors.push(3); // Pareto - special color
-      } else if (source === 'NN') {
-        colors.push(2); // NN trials
-      } else if (source === 'V10_FEA') {
-        colors.push(0); // V10 FEA
-      } else {
-        colors.push(1); // V11 FEA
-      }
-    });
-
-    // Color scale: V10_FEA (light blue), FEA (blue), NN (orange), Pareto (green)
-    const scale: [number, string][] = [
-      [0, '#93C5FD'],      // V10_FEA - light blue
-      [0.33, '#2563EB'],   // FEA - blue
-      [0.66, '#F97316'],   // NN - orange
-      [1, '#10B981']       // Pareto - green
-    ];
-
-    return { dimensions: dims, colorValues: colors, colorScale: scale };
-  }, [trials, objectives, designVariables, paretoSet]);
-
-  if (!trials.length || dimensions.length === 0) {
-    return (
-      <div className="flex items-center justify-center h-64 text-gray-500">
-        No trial data available for parallel coordinates
-      </div>
-    );
-  }
-
-  // Count trial types for legend
-  const feaCount = trials.filter(t => {
-    const source = t.source || t.user_attrs?.source || 'FEA';
-    return source === 'FEA' || source === 'V10_FEA';
-  }).length;
-  const nnCount = trials.filter(t => {
-    const source = t.source || t.user_attrs?.source || 'FEA';
-    return source === 'NN';
-  }).length;
-
-  return (
-    <div className="w-full">
-      {/* Legend */}
-      <div className="flex gap-4 justify-center mb-2 text-sm">
-        <div className="flex items-center gap-1.5">
-          <div className="w-4 h-1 rounded" style={{ backgroundColor: '#2563EB' }} />
-          <span className="text-gray-600">FEA ({feaCount})</span>
-        </div>
-        <div className="flex items-center gap-1.5">
-          <div className="w-4 h-1 rounded" style={{ backgroundColor: '#F97316' }} />
-          <span className="text-gray-600">NN ({nnCount})</span>
-        </div>
-        {paretoFront.length > 0 && (
-          <div className="flex items-center gap-1.5">
-            <div className="w-4 h-1 rounded" style={{ backgroundColor: '#10B981' }} />
-            <span className="text-gray-600">Pareto ({paretoFront.length})</span>
-          </div>
-        )}
-      </div>
-
-      <Plot
-        data={[
-          {
-            type: 'parcoords',
-            line: {
-              color: colorValues,
-              colorscale: colorScale as any,
-              showscale: false
-            },
-            dimensions: dimensions,
-            labelangle: -30,
-            labelfont: {
-              size: 11,
-              color: '#374151'
-            },
-            tickfont: {
-              size: 10,
-              color: '#6B7280'
-            }
-          } as any
-        ]}
-        layout={{
-          height: height,
-          margin: { l: 80, r: 80, t: 30, b: 30 },
-          paper_bgcolor: 'rgba(0,0,0,0)',
-          plot_bgcolor: 'rgba(0,0,0,0)',
-          font: {
-            family: 'Inter, system-ui, sans-serif'
-          }
-        }}
-        config={{
-          displayModeBar: true,
-          displaylogo: false,
-          modeBarButtonsToRemove: ['lasso2d', 'select2d'],
-          toImageButtonOptions: {
-            format: 'png',
-            filename: 'parallel_coordinates',
-            height: 800,
-            width: 1400,
-            scale: 2
-          }
-        }}
-        style={{ width: '100%' }}
-      />
-
-      <p className="text-xs text-gray-500 text-center mt-2">
-        Drag along axes to filter. Double-click to reset.
-      </p>
-    </div>
-  );
-}

atomizer-dashboard/frontend/src/components/plotly/PlotlyParameterImportance.tsx

@@ -1,209 +0,0 @@
-/**
- * PlotlyParameterImportance - Interactive parameter importance chart using Plotly
- *
- * Features:
- * - Horizontal bar chart showing correlation/importance
- * - Color coding by positive/negative correlation
- * - Hover tooltips with details
- * - Sortable by importance
- */
-
-import { useMemo, useState } from 'react';
-import Plot from 'react-plotly.js';
-
-interface Trial {
-  trial_number: number;
-  values: number[];
-  params: Record<string, number>;
-  user_attrs?: Record<string, any>;
-}
-
-interface DesignVariable {
-  name: string;
-  unit?: string;
-}
-
-interface PlotlyParameterImportanceProps {
-  trials: Trial[];
-  designVariables: DesignVariable[];
-  objectiveIndex?: number;
-  objectiveName?: string;
-  height?: number;
-}
-
-// Calculate Pearson correlation coefficient
-function pearsonCorrelation(x: number[], y: number[]): number {
-  const n = x.length;
-  if (n === 0) return 0;
-
-  const sumX = x.reduce((a, b) => a + b, 0);
-  const sumY = y.reduce((a, b) => a + b, 0);
-  const sumXY = x.reduce((acc, xi, i) => acc + xi * y[i], 0);
-  const sumX2 = x.reduce((acc, xi) => acc + xi * xi, 0);
-  const sumY2 = y.reduce((acc, yi) => acc + yi * yi, 0);
-
-  const numerator = n * sumXY - sumX * sumY;
-  const denominator = Math.sqrt((n * sumX2 - sumX * sumX) * (n * sumY2 - sumY * sumY));
-
-  if (denominator === 0) return 0;
-  return numerator / denominator;
-}
-
-export function PlotlyParameterImportance({
-  trials,
-  designVariables,
-  objectiveIndex = 0,
-  objectiveName = 'Objective',
-  height = 400
-}: PlotlyParameterImportanceProps) {
-  const [sortBy, setSortBy] = useState<'importance' | 'name'>('importance');
-
-  // Calculate correlations for each parameter
-  const correlations = useMemo(() => {
-    if (!trials.length || !designVariables.length) return [];
-
-    // Get objective values
-    const objValues = trials.map(t => {
-      if (t.values && t.values[objectiveIndex] !== undefined) {
-        return t.values[objectiveIndex];
-      }
-      return t.user_attrs?.[objectiveName] ?? null;
-    }).filter((v): v is number => v !== null && isFinite(v));
-
-    if (objValues.length < 3) return []; // Need at least 3 points for correlation
-
-    const results: { name: string; correlation: number; absCorrelation: number }[] = [];
-
-    designVariables.forEach(dv => {
-      const paramValues = trials
-        .map((t) => {
-          const objVal = t.values?.[objectiveIndex] ?? t.user_attrs?.[objectiveName];
-          if (objVal === null || objVal === undefined || !isFinite(objVal)) return null;
-          return { param: t.params[dv.name], obj: objVal };
-        })
-        .filter((v): v is { param: number; obj: number } => v !== null && v.param !== undefined);
-
-      if (paramValues.length < 3) return;
-
-      const x = paramValues.map(v => v.param);
-      const y = paramValues.map(v => v.obj);
-      const corr = pearsonCorrelation(x, y);
-
-      results.push({
-        name: dv.name,
-        correlation: corr,
-        absCorrelation: Math.abs(corr)
-      });
-    });
-
-    // Sort by absolute correlation or name
-    if (sortBy === 'importance') {
-      results.sort((a, b) => b.absCorrelation - a.absCorrelation);
-    } else {
-      results.sort((a, b) => a.name.localeCompare(b.name));
-    }
-
-    return results;
-  }, [trials, designVariables, objectiveIndex, objectiveName, sortBy]);
-
-  if (!correlations.length) {
-    return (
-      <div className="flex items-center justify-center h-64 text-gray-500">
-        Not enough data to calculate parameter importance
-      </div>
-    );
-  }
-
-  // Build bar chart data
-  const names = correlations.map(c => c.name);
-  const values = correlations.map(c => c.correlation);
-  const colors = values.map(v => v > 0 ? '#EF4444' : '#22C55E'); // Red for positive (worse), Green for negative (better) when minimizing
-  const hoverTexts = correlations.map(c =>
-    `${c.name}<br>Correlation: ${c.correlation.toFixed(4)}<br>|r|: ${c.absCorrelation.toFixed(4)}<br>${c.correlation > 0 ? 'Higher → Higher objective' : 'Higher → Lower objective'}`
-  );
-
-  return (
-    <div className="w-full">
-      {/* Controls */}
-      <div className="flex justify-between items-center mb-3">
-        <div className="text-sm text-gray-600">
-          Correlation with <span className="font-semibold">{objectiveName}</span>
-        </div>
-        <div className="flex gap-2">
-          <button
-            onClick={() => setSortBy('importance')}
-            className={`px-3 py-1 text-xs rounded ${sortBy === 'importance' ? 'bg-blue-500 text-white' : 'bg-gray-100 text-gray-700'}`}
-          >
-            By Importance
-          </button>
-          <button
-            onClick={() => setSortBy('name')}
-            className={`px-3 py-1 text-xs rounded ${sortBy === 'name' ? 'bg-blue-500 text-white' : 'bg-gray-100 text-gray-700'}`}
-          >
-            By Name
-          </button>
-        </div>
-      </div>
-
-      <Plot
-        data={[
-          {
-            type: 'bar',
-            orientation: 'h',
-            y: names,
-            x: values,
-            text: hoverTexts,
-            hoverinfo: 'text',
-            marker: {
-              color: colors,
-              line: { color: '#fff', width: 1 }
-            }
-          }
-        ]}
-        layout={{
-          height: Math.max(height, correlations.length * 30 + 80),
-          margin: { l: 150, r: 30, t: 10, b: 50 },
-          paper_bgcolor: 'rgba(0,0,0,0)',
-          plot_bgcolor: 'rgba(0,0,0,0)',
-          xaxis: {
-            title: { text: 'Correlation Coefficient' },
-            range: [-1, 1],
-            gridcolor: '#E5E7EB',
-            zerolinecolor: '#9CA3AF',
-            zerolinewidth: 2
-          },
-          yaxis: {
-            automargin: true
-          },
-          font: { family: 'Inter, system-ui, sans-serif', size: 11 },
-          bargap: 0.3
-        }}
-        config={{
-          displayModeBar: true,
-          displaylogo: false,
-          modeBarButtonsToRemove: ['lasso2d', 'select2d'],
-          toImageButtonOptions: {
-            format: 'png',
-            filename: 'parameter_importance',
-            height: 600,
-            width: 800,
-            scale: 2
-          }
-        }}
-        style={{ width: '100%' }}
-      />
-
-      {/* Legend */}
-      <div className="flex gap-6 justify-center mt-3 text-xs">
-        <div className="flex items-center gap-1.5">
-          <div className="w-4 h-3 rounded" style={{ backgroundColor: '#EF4444' }} />
-          <span className="text-gray-600">Positive correlation (higher param → higher objective)</span>
-        </div>
-        <div className="flex items-center gap-1.5">
-          <div className="w-4 h-3 rounded" style={{ backgroundColor: '#22C55E' }} />
-          <span className="text-gray-600">Negative correlation (higher param → lower objective)</span>
-        </div>
-      </div>
-    </div>
-  );
-}

atomizer-dashboard/frontend/src/components/plotly/PlotlyParetoPlot.tsx

@@ -1,448 +0,0 @@
-/**
- * PlotlyParetoPlot - Interactive Pareto front visualization using Plotly
- *
- * Features:
- * - 2D scatter with Pareto front highlighted
- * - 3D scatter for 3-objective problems
- * - Hover tooltips with trial details
- * - Pareto front connection line
- * - FEA vs NN differentiation
- * - Constraint satisfaction highlighting
- * - Dark mode styling
- * - Zoom, pan, and export
- */
-
-import { useMemo, useState } from 'react';
-import Plot from 'react-plotly.js';
-
-interface Trial {
-  trial_number: number;
-  values: number[];
-  params: Record<string, number>;
-  user_attrs?: Record<string, any>;
-  source?: 'FEA' | 'NN' | 'V10_FEA';
-  constraint_satisfied?: boolean;
-}
-
-interface Objective {
-  name: string;
-  direction?: 'minimize' | 'maximize';
-  unit?: string;
-}
-
-interface PlotlyParetoPlotProps {
-  trials: Trial[];
-  paretoFront: Trial[];
-  objectives: Objective[];
-  height?: number;
-  showParetoLine?: boolean;
-  showInfeasible?: boolean;
-}
-
-export function PlotlyParetoPlot({
-  trials,
-  paretoFront,
-  objectives,
-  height = 500,
-  showParetoLine = true,
-  showInfeasible = true
-}: PlotlyParetoPlotProps) {
-  const [viewMode, setViewMode] = useState<'2d' | '3d'>(objectives.length >= 3 ? '3d' : '2d');
-  const [selectedObjectives, setSelectedObjectives] = useState<[number, number, number]>([0, 1, 2]);
-
-  const paretoSet = useMemo(() => new Set(paretoFront.map(t => t.trial_number)), [paretoFront]);
-
-  // Separate trials by source, Pareto status, and constraint satisfaction
-  const { feaTrials, nnTrials, paretoTrials, infeasibleTrials, stats } = useMemo(() => {
-    const fea: Trial[] = [];
-    const nn: Trial[] = [];
-    const pareto: Trial[] = [];
-    const infeasible: Trial[] = [];
-
-    trials.forEach(t => {
-      const source = t.source || t.user_attrs?.source || 'FEA';
-      const isFeasible = t.constraint_satisfied !== false && t.user_attrs?.constraint_satisfied !== false;
-
-      if (!isFeasible && showInfeasible) {
-        infeasible.push(t);
-      } else if (paretoSet.has(t.trial_number)) {
-        pareto.push(t);
-      } else if (source === 'NN') {
-        nn.push(t);
-      } else {
-        fea.push(t);
-      }
-    });
-
-    // Calculate statistics
-    const stats = {
-      totalTrials: trials.length,
-      paretoCount: pareto.length,
-      feaCount: fea.length + pareto.filter(t => (t.source || 'FEA') !== 'NN').length,
-      nnCount: nn.length + pareto.filter(t => t.source === 'NN').length,
-      infeasibleCount: infeasible.length,
-      hypervolume: 0 // Could calculate if needed
-    };
-
-    return { feaTrials: fea, nnTrials: nn, paretoTrials: pareto, infeasibleTrials: infeasible, stats };
-  }, [trials, paretoSet, showInfeasible]);
-
-  // Helper to get objective value
-  const getObjValue = (trial: Trial, idx: number): number => {
-    if (trial.values && trial.values[idx] !== undefined) {
-      return trial.values[idx];
-    }
-    const objName = objectives[idx]?.name;
-    return trial.user_attrs?.[objName] ?? 0;
-  };
-
-  // Build hover text
-  const buildHoverText = (trial: Trial): string => {
-    const lines = [`Trial #${trial.trial_number}`];
-    objectives.forEach((obj, i) => {
-      const val = getObjValue(trial, i);
-      lines.push(`${obj.name}: ${val.toFixed(4)}${obj.unit ? ` ${obj.unit}` : ''}`);
-    });
-    const source = trial.source || trial.user_attrs?.source || 'FEA';
-    lines.push(`Source: ${source}`);
-    return lines.join('<br>');
-  };
-
-  // Create trace data
-  const createTrace = (
-    trialList: Trial[],
-    name: string,
-    color: string,
-    symbol: string,
-    size: number,
-    opacity: number
-  ) => {
-    const [i, j, k] = selectedObjectives;
-
-    if (viewMode === '3d' && objectives.length >= 3) {
-      return {
-        type: 'scatter3d' as const,
-        mode: 'markers' as const,
-        name,
-        x: trialList.map(t => getObjValue(t, i)),
-        y: trialList.map(t => getObjValue(t, j)),
-        z: trialList.map(t => getObjValue(t, k)),
-        text: trialList.map(buildHoverText),
-        hoverinfo: 'text' as const,
-        marker: {
-          color,
-          size,
-          symbol,
-          opacity,
-          line: { color: '#fff', width: 1 }
-        }
-      };
-    } else {
-      return {
-        type: 'scatter' as const,
-        mode: 'markers' as const,
-        name,
-        x: trialList.map(t => getObjValue(t, i)),
-        y: trialList.map(t => getObjValue(t, j)),
-        text: trialList.map(buildHoverText),
-        hoverinfo: 'text' as const,
-        marker: {
-          color,
-          size,
-          symbol,
-          opacity,
-          line: { color: '#fff', width: 1 }
-        }
-      };
-    }
-  };
-
-  // Sort Pareto trials by first objective for line connection
-  const sortedParetoTrials = useMemo(() => {
-    const [i] = selectedObjectives;
-    return [...paretoTrials].sort((a, b) => getObjValue(a, i) - getObjValue(b, i));
-  }, [paretoTrials, selectedObjectives]);
-
-  // Create Pareto front line trace (2D only)
-  const createParetoLine = () => {
-    if (!showParetoLine || viewMode === '3d' || sortedParetoTrials.length < 2) return null;
-    const [i, j] = selectedObjectives;
-    return {
-      type: 'scatter' as const,
-      mode: 'lines' as const,
-      name: 'Pareto Front',
-      x: sortedParetoTrials.map(t => getObjValue(t, i)),
-      y: sortedParetoTrials.map(t => getObjValue(t, j)),
-      line: {
-        color: '#10B981',
-        width: 2,
-        dash: 'dot'
-      },
-      hoverinfo: 'skip' as const,
-      showlegend: false
-    };
-  };
-
-  const traces = [
-    // Infeasible trials (background, red X)
-    ...(showInfeasible && infeasibleTrials.length > 0 ? [
-      createTrace(infeasibleTrials, `Infeasible (${infeasibleTrials.length})`, '#EF4444', 'x', 7, 0.4)
-    ] : []),
-    // FEA trials (blue circles)
-    createTrace(feaTrials, `FEA (${feaTrials.length})`, '#3B82F6', 'circle', 8, 0.6),
-    // NN trials (purple diamonds)
-    createTrace(nnTrials, `NN (${nnTrials.length})`, '#A855F7', 'diamond', 8, 0.5),
-    // Pareto front line (2D only)
-    createParetoLine(),
-    // Pareto front points (highlighted)
-    createTrace(sortedParetoTrials, `Pareto (${sortedParetoTrials.length})`, '#10B981', 'star', 14, 1.0)
-  ].filter(trace => trace && (trace.x as number[]).length > 0);
-
-  const [i, j, k] = selectedObjectives;
-
-  // Dark mode color scheme
-  const colors = {
-    text: '#E5E7EB',
-    textMuted: '#9CA3AF',
-    grid: 'rgba(255,255,255,0.1)',
-    zeroline: 'rgba(255,255,255,0.2)',
-    legendBg: 'rgba(30,30,30,0.9)',
-    legendBorder: 'rgba(255,255,255,0.1)'
-  };
-
-  const layout: any = viewMode === '3d' && objectives.length >= 3
-    ? {
-        height,
-        margin: { l: 50, r: 50, t: 30, b: 50 },
-        paper_bgcolor: 'transparent',
-        plot_bgcolor: 'transparent',
-        scene: {
-          xaxis: {
-            title: { text: objectives[i]?.name || 'Objective 1', font: { color: colors.text } },
-            gridcolor: colors.grid,
-            zerolinecolor: colors.zeroline,
-            tickfont: { color: colors.textMuted }
-          },
-          yaxis: {
-            title: { text: objectives[j]?.name || 'Objective 2', font: { color: colors.text } },
-            gridcolor: colors.grid,
-            zerolinecolor: colors.zeroline,
-            tickfont: { color: colors.textMuted }
-          },
-          zaxis: {
-            title: { text: objectives[k]?.name || 'Objective 3', font: { color: colors.text } },
-            gridcolor: colors.grid,
-            zerolinecolor: colors.zeroline,
-            tickfont: { color: colors.textMuted }
-          },
-          bgcolor: 'transparent'
-        },
-        legend: {
-          x: 1,
-          y: 1,
-          font: { color: colors.text },
-          bgcolor: colors.legendBg,
-          bordercolor: colors.legendBorder,
-          borderwidth: 1
-        },
-        font: { family: 'Inter, system-ui, sans-serif', color: colors.text }
-      }
-    : {
-        height,
-        margin: { l: 60, r: 30, t: 30, b: 60 },
-        paper_bgcolor: 'transparent',
-        plot_bgcolor: 'transparent',
-        xaxis: {
-          title: { text: objectives[i]?.name || 'Objective 1', font: { color: colors.text } },
-          gridcolor: colors.grid,
-          zerolinecolor: colors.zeroline,
-          tickfont: { color: colors.textMuted }
-        },
-        yaxis: {
-          title: { text: objectives[j]?.name || 'Objective 2', font: { color: colors.text } },
-          gridcolor: colors.grid,
-          zerolinecolor: colors.zeroline,
-          tickfont: { color: colors.textMuted }
-        },
-        legend: {
-          x: 1,
-          y: 1,
-          xanchor: 'right',
-          font: { color: colors.text },
-          bgcolor: colors.legendBg,
-          bordercolor: colors.legendBorder,
-          borderwidth: 1
-        },
-        font: { family: 'Inter, system-ui, sans-serif', color: colors.text },
-        hovermode: 'closest' as const
-      };
-
-  if (!trials.length) {
-    return (
-      <div className="flex items-center justify-center h-64 text-dark-400">
-        No trial data available
-      </div>
-    );
-  }
-
-  return (
-    <div className="w-full">
-      {/* Stats Bar */}
-      <div className="flex gap-4 mb-4 text-sm">
-        <div className="flex items-center gap-2 px-3 py-1.5 bg-dark-700 rounded-lg">
-          <div className="w-3 h-3 bg-green-500 rounded-full" />
-          <span className="text-dark-300">Pareto:</span>
-          <span className="text-green-400 font-medium">{stats.paretoCount}</span>
-        </div>
-        <div className="flex items-center gap-2 px-3 py-1.5 bg-dark-700 rounded-lg">
-          <div className="w-3 h-3 bg-blue-500 rounded-full" />
-          <span className="text-dark-300">FEA:</span>
-          <span className="text-blue-400 font-medium">{stats.feaCount}</span>
-        </div>
-        <div className="flex items-center gap-2 px-3 py-1.5 bg-dark-700 rounded-lg">
-          <div className="w-3 h-3 bg-purple-500 rounded-full" />
-          <span className="text-dark-300">NN:</span>
-          <span className="text-purple-400 font-medium">{stats.nnCount}</span>
-        </div>
-        {stats.infeasibleCount > 0 && (
-          <div className="flex items-center gap-2 px-3 py-1.5 bg-dark-700 rounded-lg">
-            <div className="w-3 h-3 bg-red-500 rounded-full" />
-            <span className="text-dark-300">Infeasible:</span>
-            <span className="text-red-400 font-medium">{stats.infeasibleCount}</span>
-          </div>
-        )}
-      </div>
-
-      {/* Controls */}
-      <div className="flex gap-4 items-center justify-between mb-3">
-        <div className="flex gap-2 items-center">
-          {objectives.length >= 3 && (
-            <div className="flex rounded-lg overflow-hidden border border-dark-600">
-              <button
-                onClick={() => setViewMode('2d')}
-                className={`px-3 py-1.5 text-sm font-medium transition-colors ${
-                  viewMode === '2d'
-                    ? 'bg-primary-600 text-white'
-                    : 'bg-dark-700 text-dark-300 hover:bg-dark-600 hover:text-white'
-                }`}
-              >
-                2D
-              </button>
-              <button
-                onClick={() => setViewMode('3d')}
-                className={`px-3 py-1.5 text-sm font-medium transition-colors ${
-                  viewMode === '3d'
-                    ? 'bg-primary-600 text-white'
-                    : 'bg-dark-700 text-dark-300 hover:bg-dark-600 hover:text-white'
-                }`}
-              >
-                3D
-              </button>
-            </div>
-          )}
-        </div>
-
-        {/* Objective selectors */}
-        <div className="flex gap-2 items-center text-sm">
-          <label className="text-dark-400">X:</label>
-          <select
-            value={selectedObjectives[0]}
-            onChange={(e) => setSelectedObjectives([parseInt(e.target.value), selectedObjectives[1], selectedObjectives[2]])}
-            className="px-2 py-1.5 bg-dark-700 border border-dark-600 rounded text-white text-sm"
-          >
-            {objectives.map((obj, idx) => (
-              <option key={idx} value={idx}>{obj.name}</option>
-            ))}
-          </select>
-
-          <label className="text-dark-400 ml-2">Y:</label>
-          <select
-            value={selectedObjectives[1]}
-            onChange={(e) => setSelectedObjectives([selectedObjectives[0], parseInt(e.target.value), selectedObjectives[2]])}
-            className="px-2 py-1.5 bg-dark-700 border border-dark-600 rounded text-white text-sm"
-          >
-            {objectives.map((obj, idx) => (
-              <option key={idx} value={idx}>{obj.name}</option>
-            ))}
-          </select>
-
-          {viewMode === '3d' && objectives.length >= 3 && (
-            <>
-              <label className="text-dark-400 ml-2">Z:</label>
-              <select
-                value={selectedObjectives[2]}
-                onChange={(e) => setSelectedObjectives([selectedObjectives[0], selectedObjectives[1], parseInt(e.target.value)])}
-                className="px-2 py-1.5 bg-dark-700 border border-dark-600 rounded text-white text-sm"
-              >
-                {objectives.map((obj, idx) => (
-                  <option key={idx} value={idx}>{obj.name}</option>
-                ))}
-              </select>
-            </>
-          )}
-        </div>
-      </div>
-
-      <Plot
-        data={traces as any}
-        layout={layout}
-        config={{
-          displayModeBar: true,
-          displaylogo: false,
-          modeBarButtonsToRemove: ['lasso2d', 'select2d'],
-          toImageButtonOptions: {
-            format: 'png',
-            filename: 'pareto_front',
-            height: 800,
-            width: 1200,
-            scale: 2
-          }
-        }}
-        style={{ width: '100%' }}
-      />
-
-      {/* Pareto Front Table for 2D view */}
-      {viewMode === '2d' && sortedParetoTrials.length > 0 && (
-        <div className="mt-4 max-h-48 overflow-auto">
-          <table className="w-full text-sm">
-            <thead className="sticky top-0 bg-dark-800">
-              <tr className="border-b border-dark-600">
-                <th className="text-left py-2 px-3 text-dark-400 font-medium">Trial</th>
-                <th className="text-left py-2 px-3 text-dark-400 font-medium">{objectives[i]?.name || 'Obj 1'}</th>
-                <th className="text-left py-2 px-3 text-dark-400 font-medium">{objectives[j]?.name || 'Obj 2'}</th>
-                <th className="text-left py-2 px-3 text-dark-400 font-medium">Source</th>
-              </tr>
-            </thead>
-            <tbody>
-              {sortedParetoTrials.slice(0, 10).map(trial => (
-                <tr key={trial.trial_number} className="border-b border-dark-700 hover:bg-dark-750">
-                  <td className="py-2 px-3 font-mono text-white">#{trial.trial_number}</td>
-                  <td className="py-2 px-3 font-mono text-green-400">
-                    {getObjValue(trial, i).toExponential(4)}
-                  </td>
-                  <td className="py-2 px-3 font-mono text-green-400">
-                    {getObjValue(trial, j).toExponential(4)}
-                  </td>
-                  <td className="py-2 px-3">
-                    <span className={`px-2 py-0.5 rounded text-xs ${
-                      (trial.source || trial.user_attrs?.source) === 'NN'
-                        ? 'bg-purple-500/20 text-purple-400'
-                        : 'bg-blue-500/20 text-blue-400'
-                    }`}>
-                      {trial.source || trial.user_attrs?.source || 'FEA'}
-                    </span>
-                  </td>
-                </tr>
-              ))}
-            </tbody>
-          </table>
-          {sortedParetoTrials.length > 10 && (
-            <div className="text-center py-2 text-dark-500 text-xs">
-              Showing 10 of {sortedParetoTrials.length} Pareto-optimal solutions
-            </div>
-          )}
-        </div>
-      )}
-    </div>
-  );
-}

atomizer-dashboard/frontend/src/components/plotly/PlotlyRunComparison.tsx

@@ -1,247 +0,0 @@
-import { useMemo } from 'react';
-import Plot from 'react-plotly.js';
-import { TrendingUp, TrendingDown, Minus } from 'lucide-react';
-
-interface Run {
-  run_id: number;
-  name: string;
-  source: 'FEA' | 'NN';
-  trial_count: number;
-  best_value: number | null;
-  avg_value: number | null;
-  first_trial: string | null;
-  last_trial: string | null;
-}
-
-interface PlotlyRunComparisonProps {
-  runs: Run[];
-  height?: number;
-}
-
-export function PlotlyRunComparison({ runs, height = 400 }: PlotlyRunComparisonProps) {
-  const chartData = useMemo(() => {
-    if (runs.length === 0) return null;
-
-    // Separate FEA and NN runs
-    const feaRuns = runs.filter(r => r.source === 'FEA');
-    const nnRuns = runs.filter(r => r.source === 'NN');
-
-    // Create bar chart for trial counts
-    const trialCountData = {
-      x: runs.map(r => r.name),
-      y: runs.map(r => r.trial_count),
-      type: 'bar' as const,
-      name: 'Trial Count',
-      marker: {
-        color: runs.map(r => r.source === 'NN' ? 'rgba(147, 51, 234, 0.8)' : 'rgba(59, 130, 246, 0.8)'),
-        line: { color: runs.map(r => r.source === 'NN' ? 'rgb(147, 51, 234)' : 'rgb(59, 130, 246)'), width: 1 }
-      },
-      hovertemplate: '<b>%{x}</b><br>Trials: %{y}<extra></extra>'
-    };
-
-    // Create line chart for best values
-    const bestValueData = {
-      x: runs.map(r => r.name),
-      y: runs.map(r => r.best_value),
-      type: 'scatter' as const,
-      mode: 'lines+markers' as const,
-      name: 'Best Value',
-      yaxis: 'y2',
-      line: { color: 'rgba(16, 185, 129, 1)', width: 2 },
-      marker: { size: 8, color: 'rgba(16, 185, 129, 1)' },
-      hovertemplate: '<b>%{x}</b><br>Best: %{y:.4e}<extra></extra>'
-    };
-
-    return { trialCountData, bestValueData, feaRuns, nnRuns };
-  }, [runs]);
-
-  // Calculate statistics
-  const stats = useMemo(() => {
-    if (runs.length === 0) return null;
-
-    const totalTrials = runs.reduce((sum, r) => sum + r.trial_count, 0);
-    const feaTrials = runs.filter(r => r.source === 'FEA').reduce((sum, r) => sum + r.trial_count, 0);
-    const nnTrials = runs.filter(r => r.source === 'NN').reduce((sum, r) => sum + r.trial_count, 0);
-
-    const bestValues = runs.map(r => r.best_value).filter((v): v is number => v !== null);
-    const overallBest = bestValues.length > 0 ? Math.min(...bestValues) : null;
-
-    // Calculate improvement from first FEA run to overall best
-    const feaRuns = runs.filter(r => r.source === 'FEA');
-    const firstFEA = feaRuns.length > 0 ? feaRuns[0].best_value : null;
-    const improvement = firstFEA && overallBest ? ((firstFEA - overallBest) / Math.abs(firstFEA)) * 100 : null;
-
-    return {
-      totalTrials,
-      feaTrials,
-      nnTrials,
-      overallBest,
-      improvement,
-      totalRuns: runs.length,
-      feaRuns: runs.filter(r => r.source === 'FEA').length,
-      nnRuns: runs.filter(r => r.source === 'NN').length
-    };
-  }, [runs]);
-
-  if (!chartData || !stats) {
-    return (
-      <div className="flex items-center justify-center h-64 text-dark-400">
-        No run data available
-      </div>
-    );
-  }
-
-  return (
-    <div className="space-y-4">
-      {/* Stats Summary */}
-      <div className="grid grid-cols-2 md:grid-cols-4 lg:grid-cols-6 gap-3">
-        <div className="bg-dark-750 rounded-lg p-3">
-          <div className="text-xs text-dark-400 mb-1">Total Runs</div>
-          <div className="text-xl font-bold text-white">{stats.totalRuns}</div>
-        </div>
-        <div className="bg-dark-750 rounded-lg p-3">
-          <div className="text-xs text-dark-400 mb-1">Total Trials</div>
-          <div className="text-xl font-bold text-white">{stats.totalTrials}</div>
-        </div>
-        <div className="bg-dark-750 rounded-lg p-3">
-          <div className="text-xs text-dark-400 mb-1">FEA Trials</div>
-          <div className="text-xl font-bold text-blue-400">{stats.feaTrials}</div>
-        </div>
-        <div className="bg-dark-750 rounded-lg p-3">
-          <div className="text-xs text-dark-400 mb-1">NN Trials</div>
-          <div className="text-xl font-bold text-purple-400">{stats.nnTrials}</div>
-        </div>
-        <div className="bg-dark-750 rounded-lg p-3">
-          <div className="text-xs text-dark-400 mb-1">Best Value</div>
-          <div className="text-xl font-bold text-green-400">
-            {stats.overallBest !== null ? stats.overallBest.toExponential(3) : 'N/A'}
-          </div>
-        </div>
-        <div className="bg-dark-750 rounded-lg p-3">
-          <div className="text-xs text-dark-400 mb-1">Improvement</div>
-          <div className="text-xl font-bold text-primary-400 flex items-center gap-1">
-            {stats.improvement !== null ? (
-              <>
-                {stats.improvement > 0 ? <TrendingDown className="w-4 h-4" /> :
-                 stats.improvement < 0 ? <TrendingUp className="w-4 h-4" /> :
-                 <Minus className="w-4 h-4" />}
-                {Math.abs(stats.improvement).toFixed(1)}%
-              </>
-            ) : 'N/A'}
-          </div>
-        </div>
-      </div>
-
-      {/* Chart */}
-      <Plot
-        data={[chartData.trialCountData, chartData.bestValueData]}
-        layout={{
-          height,
-          margin: { l: 60, r: 60, t: 40, b: 100 },
-          paper_bgcolor: 'transparent',
-          plot_bgcolor: 'transparent',
-          font: { color: '#9ca3af', size: 11 },
-          showlegend: true,
-          legend: {
-            orientation: 'h',
-            y: 1.12,
-            x: 0.5,
-            xanchor: 'center',
-            bgcolor: 'transparent'
-          },
-          xaxis: {
-            tickangle: -45,
-            gridcolor: 'rgba(75, 85, 99, 0.3)',
-            linecolor: 'rgba(75, 85, 99, 0.5)',
-            tickfont: { size: 10 }
-          },
-          yaxis: {
-            title: { text: 'Trial Count' },
-            gridcolor: 'rgba(75, 85, 99, 0.3)',
-            linecolor: 'rgba(75, 85, 99, 0.5)',
-            zeroline: false
-          },
-          yaxis2: {
-            title: { text: 'Best Value' },
-            overlaying: 'y',
-            side: 'right',
-            gridcolor: 'rgba(75, 85, 99, 0.1)',
-            linecolor: 'rgba(75, 85, 99, 0.5)',
-            zeroline: false,
-            tickformat: '.2e'
-          },
-          bargap: 0.3,
-          hovermode: 'x unified'
-        }}
-        config={{
-          displayModeBar: true,
-          displaylogo: false,
-          modeBarButtonsToRemove: ['select2d', 'lasso2d', 'autoScale2d']
-        }}
-        className="w-full"
-        useResizeHandler
-        style={{ width: '100%' }}
-      />
-
-      {/* Runs Table */}
-      <div className="overflow-x-auto">
-        <table className="w-full text-sm">
-          <thead>
-            <tr className="border-b border-dark-600">
-              <th className="text-left py-2 px-3 text-dark-400 font-medium">Run Name</th>
-              <th className="text-left py-2 px-3 text-dark-400 font-medium">Source</th>
-              <th className="text-right py-2 px-3 text-dark-400 font-medium">Trials</th>
-              <th className="text-right py-2 px-3 text-dark-400 font-medium">Best Value</th>
-              <th className="text-right py-2 px-3 text-dark-400 font-medium">Avg Value</th>
-              <th className="text-left py-2 px-3 text-dark-400 font-medium">Duration</th>
-            </tr>
-          </thead>
-          <tbody>
-            {runs.map((run) => {
-              // Calculate duration if times available
-              let duration = '-';
-              if (run.first_trial && run.last_trial) {
-                const start = new Date(run.first_trial);
-                const end = new Date(run.last_trial);
-                const diffMs = end.getTime() - start.getTime();
-                const diffMins = Math.round(diffMs / 60000);
-                if (diffMins < 60) {
-                  duration = `${diffMins}m`;
-                } else {
-                  const hours = Math.floor(diffMins / 60);
-                  const mins = diffMins % 60;
-                  duration = `${hours}h ${mins}m`;
-                }
-              }
-
-              return (
-                <tr key={run.run_id} className="border-b border-dark-700 hover:bg-dark-750">
-                  <td className="py-2 px-3 font-mono text-white">{run.name}</td>
-                  <td className="py-2 px-3">
-                    <span className={`px-2 py-0.5 rounded text-xs ${
-                      run.source === 'NN'
-                        ? 'bg-purple-500/20 text-purple-400'
-                        : 'bg-blue-500/20 text-blue-400'
-                    }`}>
-                      {run.source}
-                    </span>
-                  </td>
-                  <td className="py-2 px-3 text-right font-mono text-white">{run.trial_count}</td>
-                  <td className="py-2 px-3 text-right font-mono text-green-400">
-                    {run.best_value !== null ? run.best_value.toExponential(4) : '-'}
-                  </td>
-                  <td className="py-2 px-3 text-right font-mono text-dark-300">
-                    {run.avg_value !== null ? run.avg_value.toExponential(4) : '-'}
-                  </td>
-                  <td className="py-2 px-3 text-dark-400">{duration}</td>
-                </tr>
-              );
-            })}
-          </tbody>
-        </table>
-      </div>
-    </div>
-  );
-}
-
-export default PlotlyRunComparison;

atomizer-dashboard/frontend/src/components/plotly/PlotlySurrogateQuality.tsx

@@ -1,202 +0,0 @@
-import { useMemo } from 'react';
-import Plot from 'react-plotly.js';
-
-interface TrialData {
-  trial_number: number;
-  values: number[];
-  source?: 'FEA' | 'NN' | 'V10_FEA';
-  user_attrs?: Record<string, any>;
-}
-
-interface PlotlySurrogateQualityProps {
-  trials: TrialData[];
-  height?: number;
-}
-
-export function PlotlySurrogateQuality({
-  trials,
-  height = 400
-}: PlotlySurrogateQualityProps) {
-  const { feaTrials, nnTrials, timeline } = useMemo(() => {
-    const fea = trials.filter(t => t.source === 'FEA' || t.source === 'V10_FEA');
-    const nn = trials.filter(t => t.source === 'NN');
-
-    // Sort by trial number for timeline
-    const sorted = [...trials].sort((a, b) => a.trial_number - b.trial_number);
-
-    // Calculate source distribution over time
-    const timeline: { trial: number; feaCount: number; nnCount: number }[] = [];
-    let feaCount = 0;
-    let nnCount = 0;
-
-    sorted.forEach(t => {
-      if (t.source === 'NN') nnCount++;
-      else feaCount++;
-
-      timeline.push({
-        trial: t.trial_number,
-        feaCount,
-        nnCount
-      });
-    });
-
-    return {
-      feaTrials: fea,
-      nnTrials: nn,
-      timeline
-    };
-  }, [trials]);
-
-  if (nnTrials.length === 0) {
-    return (
-      <div className="h-64 flex items-center justify-center text-dark-400">
-        <p>No neural network evaluations in this study</p>
-      </div>
-    );
-  }
-
-  // Objective distribution by source
-  const feaObjectives = feaTrials.map(t => t.values[0]).filter(v => v !== undefined && !isNaN(v));
-  const nnObjectives = nnTrials.map(t => t.values[0]).filter(v => v !== undefined && !isNaN(v));
-
-  return (
-    <div className="space-y-6">
-      {/* Source Distribution Over Time */}
-      <Plot
-        data={[
-          {
-            x: timeline.map(t => t.trial),
-            y: timeline.map(t => t.feaCount),
-            type: 'scatter',
-            mode: 'lines',
-            name: 'FEA Cumulative',
-            line: { color: '#3b82f6', width: 2 },
-            fill: 'tozeroy',
-            fillcolor: 'rgba(59, 130, 246, 0.2)'
-          },
-          {
-            x: timeline.map(t => t.trial),
-            y: timeline.map(t => t.nnCount),
-            type: 'scatter',
-            mode: 'lines',
-            name: 'NN Cumulative',
-            line: { color: '#a855f7', width: 2 },
-            fill: 'tozeroy',
-            fillcolor: 'rgba(168, 85, 247, 0.2)'
-          }
-        ]}
-        layout={{
-          title: {
-            text: 'Evaluation Source Over Time',
-            font: { color: '#fff', size: 14 }
-          },
-          height: height * 0.6,
-          margin: { l: 60, r: 30, t: 50, b: 50 },
-          paper_bgcolor: 'transparent',
-          plot_bgcolor: 'transparent',
-          xaxis: {
-            title: { text: 'Trial Number', font: { color: '#888' } },
-            tickfont: { color: '#888' },
-            gridcolor: 'rgba(255,255,255,0.05)'
-          },
-          yaxis: {
-            title: { text: 'Cumulative Count', font: { color: '#888' } },
-            tickfont: { color: '#888' },
-            gridcolor: 'rgba(255,255,255,0.1)'
-          },
-          legend: {
-            font: { color: '#888' },
-            bgcolor: 'rgba(0,0,0,0.5)',
-            orientation: 'h',
-            y: 1.1
-          },
-          showlegend: true
-        }}
-        config={{
-          displayModeBar: true,
-          modeBarButtonsToRemove: ['lasso2d', 'select2d'],
-          displaylogo: false
-        }}
-        style={{ width: '100%' }}
-      />
-
-      {/* Objective Distribution by Source */}
-      <Plot
-        data={[
-          {
-            x: feaObjectives,
-            type: 'histogram',
-            name: 'FEA',
-            marker: { color: 'rgba(59, 130, 246, 0.7)' },
-            opacity: 0.8
-          } as any,
-          {
-            x: nnObjectives,
-            type: 'histogram',
-            name: 'NN',
-            marker: { color: 'rgba(168, 85, 247, 0.7)' },
-            opacity: 0.8
-          } as any
-        ]}
-        layout={{
-          title: {
-            text: 'Objective Distribution by Source',
-            font: { color: '#fff', size: 14 }
-          },
-          height: height * 0.5,
-          margin: { l: 60, r: 30, t: 50, b: 50 },
-          paper_bgcolor: 'transparent',
-          plot_bgcolor: 'transparent',
-          xaxis: {
-            title: { text: 'Objective Value', font: { color: '#888' } },
-            tickfont: { color: '#888' },
-            gridcolor: 'rgba(255,255,255,0.05)'
-          },
-          yaxis: {
-            title: { text: 'Count', font: { color: '#888' } },
-            tickfont: { color: '#888' },
-            gridcolor: 'rgba(255,255,255,0.1)'
-          },
-          barmode: 'overlay',
-          legend: {
-            font: { color: '#888' },
-            bgcolor: 'rgba(0,0,0,0.5)',
-            orientation: 'h',
-            y: 1.1
-          },
-          showlegend: true
-        }}
-        config={{
-          displayModeBar: true,
-          modeBarButtonsToRemove: ['lasso2d', 'select2d'],
-          displaylogo: false
-        }}
-        style={{ width: '100%' }}
-      />
-
-      {/* FEA vs NN Best Values Comparison */}
-      {feaObjectives.length > 0 && nnObjectives.length > 0 && (
-        <div className="grid grid-cols-2 gap-4 mt-4">
-          <div className="bg-dark-750 rounded-lg p-4 border border-dark-600">
-            <div className="text-xs text-dark-400 uppercase mb-2">FEA Best</div>
-            <div className="text-xl font-mono text-blue-400">
-              {Math.min(...feaObjectives).toExponential(4)}
-            </div>
-            <div className="text-xs text-dark-500 mt-1">
-              from {feaObjectives.length} evaluations
-            </div>
-          </div>
-          <div className="bg-dark-750 rounded-lg p-4 border border-dark-600">
-            <div className="text-xs text-dark-400 uppercase mb-2">NN Best</div>
-            <div className="text-xl font-mono text-purple-400">
-              {Math.min(...nnObjectives).toExponential(4)}
-            </div>
-            <div className="text-xs text-dark-500 mt-1">
-              from {nnObjectives.length} predictions
-            </div>
-          </div>
-        </div>
-      )}
-    </div>
-  );
-}

atomizer-dashboard/frontend/src/components/plotly/README.md

@@ -1,217 +0,0 @@
-# Plotly Chart Components
-
-Interactive visualization components using Plotly.js for the Atomizer Dashboard.
-
-## Overview
-
-These components provide enhanced interactivity compared to Recharts:
-- Native zoom, pan, and selection
-- Export to PNG/SVG
-- Hover tooltips with detailed information
-- Brush filtering (parallel coordinates)
-- 3D visualization support
-
-## Components
-
-### PlotlyParallelCoordinates
-
-Multi-dimensional data visualization showing relationships between all variables.
-
-```tsx
-import { PlotlyParallelCoordinates } from '../components/plotly';
-
-<PlotlyParallelCoordinates
-  trials={allTrials}
-  objectives={studyMetadata.objectives}
-  designVariables={studyMetadata.design_variables}
-  paretoFront={paretoFront}
-  height={450}
-/>
-```
-
-**Props:**
-| Prop | Type | Description |
-|------|------|-------------|
-| trials | Trial[] | All trial data |
-| objectives | Objective[] | Objective definitions |
-| designVariables | DesignVariable[] | Design variable definitions |
-| paretoFront | Trial[] | Pareto-optimal trials (optional) |
-| height | number | Chart height in pixels |
-
-**Features:**
-- Drag on axes to filter data
-- Double-click to reset filters
-- Color coding: FEA (blue), NN (orange), Pareto (green)
-
-### PlotlyParetoPlot
-
-2D/3D scatter plot for Pareto front visualization.
-
-```tsx
-<PlotlyParetoPlot
-  trials={allTrials}
-  paretoFront={paretoFront}
-  objectives={studyMetadata.objectives}
-  height={350}
-/>
-```
-
-**Props:**
-| Prop | Type | Description |
-|------|------|-------------|
-| trials | Trial[] | All trial data |
-| paretoFront | Trial[] | Pareto-optimal trials |
-| objectives | Objective[] | Objective definitions |
-| height | number | Chart height in pixels |
-
-**Features:**
-- Toggle between 2D and 3D views
-- Axis selector for multi-objective problems
-- Click to select trials
-- Hover for trial details
-
-### PlotlyConvergencePlot
-
-Optimization progress over trials.
-
-```tsx
-<PlotlyConvergencePlot
-  trials={allTrials}
-  objectiveIndex={0}
-  objectiveName="weighted_objective"
-  direction="minimize"
-  height={350}
-/>
-```
-
-**Props:**
-| Prop | Type | Description |
-|------|------|-------------|
-| trials | Trial[] | All trial data |
-| objectiveIndex | number | Which objective to plot |
-| objectiveName | string | Objective display name |
-| direction | 'minimize' \| 'maximize' | Optimization direction |
-| height | number | Chart height |
-| showRangeSlider | boolean | Show zoom slider |
-
-**Features:**
-- Scatter points for each trial
-- Best-so-far step line
-- Range slider for zooming
-- FEA vs NN differentiation
-
-### PlotlyParameterImportance
-
-Correlation-based parameter sensitivity analysis.
-
-```tsx
-<PlotlyParameterImportance
-  trials={allTrials}
-  designVariables={studyMetadata.design_variables}
-  objectiveIndex={0}
-  objectiveName="weighted_objective"
-  height={350}
-/>
-```
-
-**Props:**
-| Prop | Type | Description |
-|------|------|-------------|
-| trials | Trial[] | All trial data |
-| designVariables | DesignVariable[] | Design variables |
-| objectiveIndex | number | Which objective |
-| objectiveName | string | Objective display name |
-| height | number | Chart height |
-
-**Features:**
-- Horizontal bar chart of correlations
-- Sort by importance or name
-- Color: Red (positive), Green (negative)
-- Pearson correlation coefficient
-
-## Bundle Optimization
-
-To minimize bundle size, we use:
-
-1. **plotly.js-basic-dist**: Smaller bundle (~1MB vs 3.5MB)
-   - Includes: scatter, bar, parcoords
-   - Excludes: 3D plots, maps, animations
-
-2. **Lazy Loading**: Components loaded on demand
-   ```tsx
-   const PlotlyParetoPlot = lazy(() =>
-     import('./plotly/PlotlyParetoPlot')
-       .then(m => ({ default: m.PlotlyParetoPlot }))
-   );
-   ```
-
-3. **Code Splitting**: Vite config separates Plotly into its own chunk
-   ```ts
-   manualChunks: {
-     plotly: ['plotly.js-basic-dist', 'react-plotly.js']
-   }
-   ```
-
-## Usage with Suspense
-
-Always wrap Plotly components with Suspense:
-
-```tsx
-<Suspense fallback={<ChartLoading />}>
-  <PlotlyParetoPlot {...props} />
-</Suspense>
-```
-
-## Type Definitions
-
-```typescript
-interface Trial {
-  trial_number: number;
-  values: number[];
-  params: Record<string, number>;
-  user_attrs?: Record<string, any>;
-  source?: 'FEA' | 'NN' | 'V10_FEA';
-}
-
-interface Objective {
-  name: string;
-  direction?: 'minimize' | 'maximize';
-  unit?: string;
-}
-
-interface DesignVariable {
-  name: string;
-  unit?: string;
-  min?: number;
-  max?: number;
-}
-```
-
-## Styling
-
-Components use transparent backgrounds for dark theme compatibility:
-- `paper_bgcolor: 'rgba(0,0,0,0)'`
-- `plot_bgcolor: 'rgba(0,0,0,0)'`
-- Font: Inter, system-ui, sans-serif
-- Grid colors: Tailwind gray palette
-
-## Export Options
-
-All Plotly charts include a mode bar with:
-- Download PNG
-- Download SVG (via menu)
-- Zoom, Pan, Reset
-- Auto-scale
-
-Configure export in the `config` prop:
-```tsx
-config={{
-  toImageButtonOptions: {
-    format: 'png',
-    filename: 'my_chart',
-    height: 600,
-    width: 1200,
-    scale: 2
-  }
-}}
-```

atomizer-dashboard/frontend/src/components/plotly/index.ts

@@ -1,15 +0,0 @@
-/**
- * Plotly-based interactive chart components
- *
- * These components provide enhanced interactivity compared to Recharts:
- * - Native zoom/pan
- * - Brush selection on axes
- * - 3D views for multi-objective problems
- * - Export to PNG/SVG
- * - Detailed hover tooltips
- */
-
-export { PlotlyParallelCoordinates } from './PlotlyParallelCoordinates';
-export { PlotlyParetoPlot } from './PlotlyParetoPlot';
-export { PlotlyConvergencePlot } from './PlotlyConvergencePlot';
-export { PlotlyParameterImportance } from './PlotlyParameterImportance';

atomizer-dashboard/frontend/src/components/studio/StudioBuildDialog.tsx

@@ -0,0 +1,254 @@
+/**
+ * StudioBuildDialog - Final dialog to name and build the study
+ */
+
+import React, { useState, useEffect } from 'react';
+import { X, Loader2, FolderOpen, AlertCircle, CheckCircle, Sparkles, Play } from 'lucide-react';
+import { intakeApi } from '../../api/intake';
+
+interface StudioBuildDialogProps {
+  draftId: string;
+  onClose: () => void;
+  onBuildComplete: (finalPath: string, finalName: string) => void;
+}
+
+interface Topic {
+  name: string;
+  study_count: number;
+}
+
+export const StudioBuildDialog: React.FC<StudioBuildDialogProps> = ({
+  draftId,
+  onClose,
+  onBuildComplete,
+}) => {
+  const [studyName, setStudyName] = useState('');
+  const [topic, setTopic] = useState('');
+  const [newTopic, setNewTopic] = useState('');
+  const [useNewTopic, setUseNewTopic] = useState(false);
+  const [topics, setTopics] = useState<Topic[]>([]);
+  const [isBuilding, setIsBuilding] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const [validationErrors, setValidationErrors] = useState<string[]>([]);
+  
+  // Load topics
+  useEffect(() => {
+    loadTopics();
+  }, []);
+  
+  const loadTopics = async () => {
+    try {
+      const response = await intakeApi.listTopics();
+      setTopics(response.topics);
+      if (response.topics.length > 0) {
+        setTopic(response.topics[0].name);
+      }
+    } catch (err) {
+      console.error('Failed to load topics:', err);
+    }
+  };
+  
+  // Validate study name
+  useEffect(() => {
+    const errors: string[] = [];
+    
+    if (studyName.length > 0) {
+      if (studyName.length < 3) {
+        errors.push('Name must be at least 3 characters');
+      }
+      if (!/^[a-z0-9_]+$/.test(studyName)) {
+        errors.push('Use only lowercase letters, numbers, and underscores');
+      }
+      if (studyName.startsWith('draft_')) {
+        errors.push('Name cannot start with "draft_"');
+      }
+    }
+    
+    setValidationErrors(errors);
+  }, [studyName]);
+  
+  const handleBuild = async () => {
+    const finalTopic = useNewTopic ? newTopic : topic;
+    
+    if (!studyName || !finalTopic) {
+      setError('Please provide both a study name and topic');
+      return;
+    }
+    
+    if (validationErrors.length > 0) {
+      setError('Please fix validation errors');
+      return;
+    }
+    
+    setIsBuilding(true);
+    setError(null);
+    
+    try {
+      const response = await intakeApi.finalizeStudio(draftId, {
+        topic: finalTopic,
+        newName: studyName,
+        runBaseline: false,
+      });
+      
+      onBuildComplete(response.final_path, response.final_name);
+      
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Build failed');
+    } finally {
+      setIsBuilding(false);
+    }
+  };
+  
+  const isValid = studyName.length >= 3 && 
+                  validationErrors.length === 0 && 
+                  (topic || (useNewTopic && newTopic));
+  
+  return (
+    <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-50">
+      <div className="bg-dark-850 border border-dark-700 rounded-xl shadow-xl w-full max-w-lg mx-4">
+        {/* Header */}
+        <div className="flex items-center justify-between p-4 border-b border-dark-700">
+          <div className="flex items-center gap-2">
+            <Sparkles className="w-5 h-5 text-primary-400" />
+            <h2 className="text-lg font-semibold text-white">Build Study</h2>
+          </div>
+          <button
+            onClick={onClose}
+            className="p-1 hover:bg-dark-700 rounded text-dark-400 hover:text-white transition-colors"
+          >
+            <X className="w-5 h-5" />
+          </button>
+        </div>
+        
+        {/* Content */}
+        <div className="p-6 space-y-6">
+          {/* Study Name */}
+          <div>
+            <label className="block text-sm font-medium text-dark-300 mb-2">
+              Study Name
+            </label>
+            <input
+              type="text"
+              value={studyName}
+              onChange={(e) => setStudyName(e.target.value.toLowerCase().replace(/[^a-z0-9_]/g, '_'))}
+              placeholder="my_optimization_study"
+              className="w-full bg-dark-700 border border-dark-600 rounded-lg px-3 py-2 text-white placeholder-dark-500 focus:outline-none focus:border-primary-400"
+            />
+            {validationErrors.length > 0 && (
+              <div className="mt-2 space-y-1">
+                {validationErrors.map((err, i) => (
+                  <p key={i} className="text-xs text-red-400 flex items-center gap-1">
+                    <AlertCircle className="w-3 h-3" />
+                    {err}
+                  </p>
+                ))}
+              </div>
+            )}
+            {studyName.length >= 3 && validationErrors.length === 0 && (
+              <p className="mt-2 text-xs text-green-400 flex items-center gap-1">
+                <CheckCircle className="w-3 h-3" />
+                Name is valid
+              </p>
+            )}
+          </div>
+          
+          {/* Topic Selection */}
+          <div>
+            <label className="block text-sm font-medium text-dark-300 mb-2">
+              Topic Folder
+            </label>
+            
+            {!useNewTopic && topics.length > 0 && (
+              <div className="space-y-2">
+                <select
+                  value={topic}
+                  onChange={(e) => setTopic(e.target.value)}
+                  className="w-full bg-dark-700 border border-dark-600 rounded-lg px-3 py-2 text-white focus:outline-none focus:border-primary-400"
+                >
+                  {topics.map((t) => (
+                    <option key={t.name} value={t.name}>
+                      {t.name} ({t.study_count} studies)
+                    </option>
+                  ))}
+                </select>
+                <button
+                  onClick={() => setUseNewTopic(true)}
+                  className="text-sm text-primary-400 hover:text-primary-300"
+                >
+                  + Create new topic
+                </button>
+              </div>
+            )}
+            
+            {(useNewTopic || topics.length === 0) && (
+              <div className="space-y-2">
+                <input
+                  type="text"
+                  value={newTopic}
+                  onChange={(e) => setNewTopic(e.target.value.replace(/[^A-Za-z0-9_]/g, '_'))}
+                  placeholder="NewTopic"
+                  className="w-full bg-dark-700 border border-dark-600 rounded-lg px-3 py-2 text-white placeholder-dark-500 focus:outline-none focus:border-primary-400"
+                />
+                {topics.length > 0 && (
+                  <button
+                    onClick={() => setUseNewTopic(false)}
+                    className="text-sm text-dark-400 hover:text-white"
+                  >
+                    Use existing topic
+                  </button>
+                )}
+              </div>
+            )}
+          </div>
+          
+          {/* Preview */}
+          <div className="p-3 bg-dark-700/50 rounded-lg">
+            <p className="text-xs text-dark-400 mb-1">Study will be created at:</p>
+            <p className="text-sm text-white font-mono flex items-center gap-2">
+              <FolderOpen className="w-4 h-4 text-primary-400" />
+              studies/{useNewTopic ? newTopic || '...' : topic}/{studyName || '...'}
+            </p>
+          </div>
+          
+          {/* Error */}
+          {error && (
+            <div className="p-3 rounded-lg bg-red-500/10 border border-red-500/30 text-red-400 text-sm flex items-center gap-2">
+              <AlertCircle className="w-4 h-4 flex-shrink-0" />
+              {error}
+            </div>
+          )}
+        </div>
+        
+        {/* Footer */}
+        <div className="flex items-center justify-end gap-3 p-4 border-t border-dark-700">
+          <button
+            onClick={onClose}
+            disabled={isBuilding}
+            className="px-4 py-2 text-sm text-dark-300 hover:text-white hover:bg-dark-700 rounded-lg transition-colors"
+          >
+            Cancel
+          </button>
+          <button
+            onClick={handleBuild}
+            disabled={!isValid || isBuilding}
+            className="flex items-center gap-2 px-4 py-2 text-sm font-medium bg-primary-500 text-white rounded-lg hover:bg-primary-400 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
+          >
+            {isBuilding ? (
+              <>
+                <Loader2 className="w-4 h-4 animate-spin" />
+                Building...
+              </>
+            ) : (
+              <>
+                <Play className="w-4 h-4" />
+                Build Study
+              </>
+            )}
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default StudioBuildDialog;

atomizer-dashboard/frontend/src/components/studio/StudioChat.tsx

@@ -0,0 +1,375 @@
+/**
+ * StudioChat - Context-aware AI chat for Studio
+ * 
+ * Uses the existing useChat hook to communicate with Claude via WebSocket.
+ * Injects model files and context documents into the conversation.
+ */
+
+import React, { useRef, useEffect, useState, useMemo } from 'react';
+import { Send, Loader2, Sparkles, FileText, Wifi, WifiOff, Bot, User, File, AlertCircle } from 'lucide-react';
+import { useChat } from '../../hooks/useChat';
+import { useSpecStore, useSpec } from '../../hooks/useSpecStore';
+import { MarkdownRenderer } from '../MarkdownRenderer';
+import { ToolCallCard } from '../chat/ToolCallCard';
+
+interface StudioChatProps {
+  draftId: string;
+  contextFiles: string[];
+  contextContent: string;
+  modelFiles: string[];
+  onSpecUpdated: () => void;
+}
+
+export const StudioChat: React.FC<StudioChatProps> = ({
+  draftId,
+  contextFiles,
+  contextContent,
+  modelFiles,
+  onSpecUpdated,
+}) => {
+  const messagesEndRef = useRef<HTMLDivElement>(null);
+  const inputRef = useRef<HTMLTextAreaElement>(null);
+  const [input, setInput] = useState('');
+  const [hasInjectedContext, setHasInjectedContext] = useState(false);
+  
+  // Get spec store for canvas updates
+  const spec = useSpec();
+  const { reloadSpec, setSpecFromWebSocket } = useSpecStore();
+  
+  // Build canvas state with full context for Claude
+  const canvasState = useMemo(() => ({
+    nodes: [],
+    edges: [],
+    studyName: draftId,
+    studyPath: `_inbox/${draftId}`,
+    // Include file info for Claude context
+    modelFiles,
+    contextFiles,
+    contextContent: contextContent.substring(0, 50000), // Limit context size
+  }), [draftId, modelFiles, contextFiles, contextContent]);
+  
+  // Use the chat hook with WebSocket
+  // Power mode gives Claude write permissions to modify the spec
+  const {
+    messages,
+    isThinking,
+    error,
+    isConnected,
+    sendMessage,
+    updateCanvasState,
+  } = useChat({
+    studyId: draftId,
+    mode: 'power',  // Power mode = --dangerously-skip-permissions = can write files
+    useWebSocket: true,
+    canvasState,
+    onError: (err) => console.error('[StudioChat] Error:', err),
+    onSpecUpdated: (newSpec) => {
+      // Claude modified the spec - update the store directly
+      console.log('[StudioChat] Spec updated by Claude');
+      setSpecFromWebSocket(newSpec, draftId);
+      onSpecUpdated();
+    },
+    onCanvasModification: (modification) => {
+      // Claude wants to modify canvas - reload the spec
+      console.log('[StudioChat] Canvas modification:', modification);
+      reloadSpec();
+      onSpecUpdated();
+    },
+  });
+  
+  // Update canvas state when context changes
+  useEffect(() => {
+    updateCanvasState(canvasState);
+  }, [canvasState, updateCanvasState]);
+  
+  // Scroll to bottom when messages change
+  useEffect(() => {
+    messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
+  }, [messages]);
+  
+  // Auto-focus input
+  useEffect(() => {
+    inputRef.current?.focus();
+  }, []);
+  
+  // Build context summary for display
+  const contextSummary = useMemo(() => {
+    const parts: string[] = [];
+    if (modelFiles.length > 0) {
+      parts.push(`${modelFiles.length} model file${modelFiles.length > 1 ? 's' : ''}`);
+    }
+    if (contextFiles.length > 0) {
+      parts.push(`${contextFiles.length} context doc${contextFiles.length > 1 ? 's' : ''}`);
+    }
+    if (contextContent) {
+      parts.push(`${contextContent.length.toLocaleString()} chars context`);
+    }
+    return parts.join(', ');
+  }, [modelFiles, contextFiles, contextContent]);
+  
+  const handleSend = () => {
+    if (!input.trim() || isThinking) return;
+    
+    let messageToSend = input.trim();
+    
+    // On first message, inject full context so Claude has everything it needs
+    if (!hasInjectedContext && (modelFiles.length > 0 || contextContent)) {
+      const contextParts: string[] = [];
+      
+      // Add model files info
+      if (modelFiles.length > 0) {
+        contextParts.push(`**Model Files Uploaded:**\n${modelFiles.map(f => `- ${f}`).join('\n')}`);
+      }
+      
+      // Add context document content (full text)
+      if (contextContent) {
+        contextParts.push(`**Context Documents Content:**\n\`\`\`\n${contextContent.substring(0, 30000)}\n\`\`\``);
+      }
+      
+      // Add current spec state
+      if (spec) {
+        const dvCount = spec.design_variables?.length || 0;
+        const objCount = spec.objectives?.length || 0;
+        const extCount = spec.extractors?.length || 0;
+        if (dvCount > 0 || objCount > 0 || extCount > 0) {
+          contextParts.push(`**Current Configuration:** ${dvCount} design variables, ${objCount} objectives, ${extCount} extractors`);
+        }
+      }
+      
+      if (contextParts.length > 0) {
+        messageToSend = `${contextParts.join('\n\n')}\n\n---\n\n**User Request:** ${messageToSend}`;
+      }
+      
+      setHasInjectedContext(true);
+    }
+    
+    sendMessage(messageToSend);
+    setInput('');
+  };
+  
+  const handleKeyDown = (e: React.KeyboardEvent) => {
+    if (e.key === 'Enter' && !e.shiftKey) {
+      e.preventDefault();
+      handleSend();
+    }
+  };
+  
+  // Welcome message for empty state
+  const showWelcome = messages.length === 0;
+  
+  // Check if we have any context
+  const hasContext = modelFiles.length > 0 || contextContent.length > 0;
+  
+  return (
+    <div className="h-full flex flex-col">
+      {/* Header */}
+      <div className="p-3 border-b border-dark-700 flex-shrink-0">
+        <div className="flex items-center justify-between mb-2">
+          <div className="flex items-center gap-2">
+            <Sparkles className="w-5 h-5 text-primary-400" />
+            <span className="font-medium text-white">Studio Assistant</span>
+          </div>
+          <span className={`flex items-center gap-1 text-xs px-2 py-0.5 rounded ${
+            isConnected 
+              ? 'text-green-400 bg-green-400/10' 
+              : 'text-red-400 bg-red-400/10'
+          }`}>
+            {isConnected ? <Wifi className="w-3 h-3" /> : <WifiOff className="w-3 h-3" />}
+            {isConnected ? 'Connected' : 'Disconnected'}
+          </span>
+        </div>
+        
+        {/* Context indicator */}
+        {contextSummary && (
+          <div className="flex items-center gap-2 text-xs">
+            <div className="flex items-center gap-1 text-amber-400 bg-amber-400/10 px-2 py-1 rounded">
+              <FileText className="w-3 h-3" />
+              <span>{contextSummary}</span>
+            </div>
+            {hasContext && !hasInjectedContext && (
+              <span className="text-dark-500">Will be sent with first message</span>
+            )}
+            {hasInjectedContext && (
+              <span className="text-green-500">Context sent</span>
+            )}
+          </div>
+        )}
+      </div>
+      
+      {/* Messages */}
+      <div className="flex-1 overflow-y-auto p-3 space-y-4">
+        {/* Welcome message with context awareness */}
+        {showWelcome && (
+          <div className="flex gap-3">
+            <div className="flex-shrink-0 w-8 h-8 rounded-lg flex items-center justify-center bg-primary-500/20 text-primary-400">
+              <Bot className="w-4 h-4" />
+            </div>
+            <div className="flex-1 bg-dark-700 rounded-lg px-4 py-3 text-sm text-dark-100">
+              <MarkdownRenderer content={hasContext 
+                ? `I can see you've uploaded files. Here's what I have access to:
+
+${modelFiles.length > 0 ? `**Model Files:** ${modelFiles.join(', ')}` : ''}
+${contextContent ? `\n**Context Document:** ${contextContent.substring(0, 200)}...` : ''}
+
+Tell me what you want to optimize and I'll help you configure the study!`
+                : `Welcome to Atomizer Studio! I'm here to help you configure your optimization study.
+
+**What I can do:**
+- Read your uploaded context documents
+- Help set up design variables, objectives, and constraints
+- Create extractors for physics outputs
+- Suggest optimization strategies
+
+Upload your model files and any requirements documents, then tell me what you want to optimize!`} />
+            </div>
+          </div>
+        )}
+        
+        {/* File context display (only if we have files but no messages yet) */}
+        {showWelcome && modelFiles.length > 0 && (
+          <div className="bg-dark-800/50 rounded-lg p-3 border border-dark-700">
+            <p className="text-xs text-dark-400 mb-2 font-medium">Loaded Files:</p>
+            <div className="flex flex-wrap gap-2">
+              {modelFiles.map((file, idx) => (
+                <span key={idx} className="flex items-center gap-1 text-xs bg-blue-500/10 text-blue-400 px-2 py-1 rounded">
+                  <File className="w-3 h-3" />
+                  {file}
+                </span>
+              ))}
+              {contextFiles.map((file, idx) => (
+                <span key={idx} className="flex items-center gap-1 text-xs bg-amber-500/10 text-amber-400 px-2 py-1 rounded">
+                  <FileText className="w-3 h-3" />
+                  {file}
+                </span>
+              ))}
+            </div>
+          </div>
+        )}
+        
+        {/* Chat messages */}
+        {messages.map((msg) => {
+          const isAssistant = msg.role === 'assistant';
+          const isSystem = msg.role === 'system';
+          
+          // System messages
+          if (isSystem) {
+            return (
+              <div key={msg.id} className="flex justify-center my-2">
+                <div className="px-3 py-1 bg-dark-700/50 rounded-full text-xs text-dark-400 border border-dark-600">
+                  {msg.content}
+                </div>
+              </div>
+            );
+          }
+          
+          return (
+            <div
+              key={msg.id}
+              className={`flex gap-3 ${isAssistant ? '' : 'flex-row-reverse'}`}
+            >
+              {/* Avatar */}
+              <div
+                className={`flex-shrink-0 w-8 h-8 rounded-lg flex items-center justify-center ${
+                  isAssistant
+                    ? 'bg-primary-500/20 text-primary-400'
+                    : 'bg-dark-600 text-dark-300'
+                }`}
+              >
+                {isAssistant ? <Bot className="w-4 h-4" /> : <User className="w-4 h-4" />}
+              </div>
+              
+              {/* Message content */}
+              <div
+                className={`flex-1 max-w-[85%] rounded-lg px-4 py-3 text-sm ${
+                  isAssistant
+                    ? 'bg-dark-700 text-dark-100'
+                    : 'bg-primary-500 text-white ml-auto'
+                }`}
+              >
+                {isAssistant ? (
+                  <>
+                    {msg.content && <MarkdownRenderer content={msg.content} />}
+                    {msg.isStreaming && !msg.content && (
+                      <span className="text-dark-400">Thinking...</span>
+                    )}
+                    {/* Tool calls */}
+                    {msg.toolCalls && msg.toolCalls.length > 0 && (
+                      <div className="mt-3 space-y-2">
+                        {msg.toolCalls.map((tool, idx) => (
+                          <ToolCallCard key={idx} toolCall={tool} />
+                        ))}
+                      </div>
+                    )}
+                  </>
+                ) : (
+                  <span className="whitespace-pre-wrap">{msg.content}</span>
+                )}
+              </div>
+            </div>
+          );
+        })}
+        
+        {/* Thinking indicator */}
+        {isThinking && messages.length > 0 && !messages[messages.length - 1]?.isStreaming && (
+          <div className="flex gap-3">
+            <div className="flex-shrink-0 w-8 h-8 rounded-lg flex items-center justify-center bg-primary-500/20 text-primary-400">
+              <Bot className="w-4 h-4" />
+            </div>
+            <div className="bg-dark-700 rounded-lg px-4 py-3 flex items-center gap-2">
+              <Loader2 className="w-4 h-4 text-primary-400 animate-spin" />
+              <span className="text-sm text-dark-300">Thinking...</span>
+            </div>
+          </div>
+        )}
+        
+        {/* Error display */}
+        {error && (
+          <div className="flex gap-3">
+            <div className="flex-shrink-0 w-8 h-8 rounded-lg flex items-center justify-center bg-red-500/20 text-red-400">
+              <AlertCircle className="w-4 h-4" />
+            </div>
+            <div className="flex-1 px-4 py-3 bg-red-500/10 rounded-lg text-sm text-red-400 border border-red-500/30">
+              {error}
+            </div>
+          </div>
+        )}
+        
+        <div ref={messagesEndRef} />
+      </div>
+      
+      {/* Input */}
+      <div className="p-3 border-t border-dark-700 flex-shrink-0">
+        <div className="flex gap-2">
+          <textarea
+            ref={inputRef}
+            value={input}
+            onChange={(e) => setInput(e.target.value)}
+            onKeyDown={handleKeyDown}
+            placeholder={isConnected ? "Ask about your optimization..." : "Connecting..."}
+            disabled={!isConnected}
+            rows={1}
+            className="flex-1 bg-dark-700 border border-dark-600 rounded-lg px-3 py-2 text-sm text-white placeholder-dark-400 resize-none focus:outline-none focus:border-primary-400 disabled:opacity-50"
+          />
+          <button
+            onClick={handleSend}
+            disabled={!input.trim() || isThinking || !isConnected}
+            className="p-2 bg-primary-500 text-white rounded-lg hover:bg-primary-400 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
+          >
+            {isThinking ? (
+              <Loader2 className="w-5 h-5 animate-spin" />
+            ) : (
+              <Send className="w-5 h-5" />
+            )}
+          </button>
+        </div>
+        {!isConnected && (
+          <p className="text-xs text-dark-500 mt-1">
+            Waiting for connection to Claude...
+          </p>
+        )}
+      </div>
+    </div>
+  );
+};
+
+export default StudioChat;

atomizer-dashboard/frontend/src/components/studio/StudioContextFiles.tsx

@@ -0,0 +1,117 @@
+/**
+ * StudioContextFiles - Context document upload and display
+ */
+
+import React, { useState, useRef } from 'react';
+import { FileText, Upload, Trash2, Loader2 } from 'lucide-react';
+import { intakeApi } from '../../api/intake';
+
+interface StudioContextFilesProps {
+  draftId: string;
+  files: string[];
+  onUploadComplete: () => void;
+}
+
+export const StudioContextFiles: React.FC<StudioContextFilesProps> = ({
+  draftId,
+  files,
+  onUploadComplete,
+}) => {
+  const [isUploading, setIsUploading] = useState(false);
+  const [deleting, setDeleting] = useState<string | null>(null);
+  const fileInputRef = useRef<HTMLInputElement>(null);
+  
+  const VALID_EXTENSIONS = ['.md', '.txt', '.pdf', '.json', '.csv', '.docx'];
+  
+  const handleFileSelect = async (e: React.ChangeEvent<HTMLInputElement>) => {
+    const selectedFiles = Array.from(e.target.files || []);
+    if (selectedFiles.length === 0) return;
+    
+    e.target.value = '';
+    setIsUploading(true);
+    
+    try {
+      await intakeApi.uploadContextFiles(draftId, selectedFiles);
+      onUploadComplete();
+    } catch (err) {
+      console.error('Failed to upload context files:', err);
+    } finally {
+      setIsUploading(false);
+    }
+  };
+  
+  const deleteFile = async (filename: string) => {
+    setDeleting(filename);
+    
+    try {
+      await intakeApi.deleteContextFile(draftId, filename);
+      onUploadComplete();
+    } catch (err) {
+      console.error('Failed to delete context file:', err);
+    } finally {
+      setDeleting(null);
+    }
+  };
+  
+  const getFileIcon = (_filename: string) => {
+    return <FileText className="w-3.5 h-3.5 text-amber-400" />;
+  };
+  
+  return (
+    <div className="space-y-2">
+      {/* File List */}
+      {files.length > 0 && (
+        <div className="space-y-1">
+          {files.map((name) => (
+            <div
+              key={name}
+              className="flex items-center gap-2 px-2 py-1.5 rounded bg-dark-700/50 text-sm group"
+            >
+              {getFileIcon(name)}
+              <span className="text-dark-200 truncate flex-1">{name}</span>
+              <button
+                onClick={() => deleteFile(name)}
+                disabled={deleting === name}
+                className="p-1 opacity-0 group-hover:opacity-100 hover:bg-red-500/20 rounded text-red-400 transition-all"
+              >
+                {deleting === name ? (
+                  <Loader2 className="w-3 h-3 animate-spin" />
+                ) : (
+                  <Trash2 className="w-3 h-3" />
+                )}
+              </button>
+            </div>
+          ))}
+        </div>
+      )}
+      
+      {/* Upload Button */}
+      <button
+        onClick={() => fileInputRef.current?.click()}
+        disabled={isUploading}
+        className="w-full flex items-center justify-center gap-2 px-3 py-2 rounded-lg
+                   border border-dashed border-dark-600 text-dark-400 text-sm
+                   hover:border-primary-400/50 hover:text-primary-400 hover:bg-primary-400/5
+                   disabled:opacity-50 transition-colors"
+      >
+        {isUploading ? (
+          <Loader2 className="w-4 h-4 animate-spin" />
+        ) : (
+          <Upload className="w-4 h-4" />
+        )}
+        {isUploading ? 'Uploading...' : 'Add context files'}
+      </button>
+      
+      <input
+        ref={fileInputRef}
+        type="file"
+        multiple
+        accept={VALID_EXTENSIONS.join(',')}
+        onChange={handleFileSelect}
+        className="hidden"
+      />
+    </div>
+  );
+};
+
+export default StudioContextFiles;

atomizer-dashboard/frontend/src/components/studio/StudioDropZone.tsx

@@ -0,0 +1,242 @@
+/**
+ * StudioDropZone - Smart file drop zone for Studio
+ * 
+ * Handles both model files (.sim, .prt, .fem) and context files (.pdf, .md, .txt)
+ */
+
+import React, { useState, useCallback, useRef } from 'react';
+import { Upload, X, Loader2, AlertCircle, CheckCircle, File } from 'lucide-react';
+import { intakeApi } from '../../api/intake';
+
+interface StudioDropZoneProps {
+  draftId: string;
+  type: 'model' | 'context';
+  files: string[];
+  onUploadComplete: () => void;
+}
+
+interface FileStatus {
+  file: File;
+  status: 'pending' | 'uploading' | 'success' | 'error';
+  message?: string;
+}
+
+const MODEL_EXTENSIONS = ['.prt', '.sim', '.fem', '.afem'];
+const CONTEXT_EXTENSIONS = ['.md', '.txt', '.pdf', '.json', '.csv', '.docx'];
+
+export const StudioDropZone: React.FC<StudioDropZoneProps> = ({
+  draftId,
+  type,
+  files,
+  onUploadComplete,
+}) => {
+  const [isDragging, setIsDragging] = useState(false);
+  const [pendingFiles, setPendingFiles] = useState<FileStatus[]>([]);
+  const [isUploading, setIsUploading] = useState(false);
+  const fileInputRef = useRef<HTMLInputElement>(null);
+  
+  const validExtensions = type === 'model' ? MODEL_EXTENSIONS : CONTEXT_EXTENSIONS;
+  
+  const validateFile = (file: File): { valid: boolean; reason?: string } => {
+    const ext = '.' + file.name.split('.').pop()?.toLowerCase();
+    if (!validExtensions.includes(ext)) {
+      return { valid: false, reason: `Invalid type: ${ext}` };
+    }
+    if (file.size > 500 * 1024 * 1024) {
+      return { valid: false, reason: 'File too large (max 500MB)' };
+    }
+    return { valid: true };
+  };
+  
+  const handleDragEnter = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsDragging(true);
+  }, []);
+  
+  const handleDragLeave = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsDragging(false);
+  }, []);
+  
+  const handleDragOver = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+  }, []);
+  
+  const addFiles = useCallback((newFiles: File[]) => {
+    const validFiles: FileStatus[] = [];
+    
+    for (const file of newFiles) {
+      if (pendingFiles.some(f => f.file.name === file.name)) {
+        continue;
+      }
+      
+      const validation = validateFile(file);
+      validFiles.push({
+        file,
+        status: validation.valid ? 'pending' : 'error',
+        message: validation.reason,
+      });
+    }
+    
+    setPendingFiles(prev => [...prev, ...validFiles]);
+  }, [pendingFiles, validExtensions]);
+  
+  const handleDrop = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsDragging(false);
+    addFiles(Array.from(e.dataTransfer.files));
+  }, [addFiles]);
+  
+  const handleFileSelect = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
+    addFiles(Array.from(e.target.files || []));
+    e.target.value = '';
+  }, [addFiles]);
+  
+  const removeFile = (index: number) => {
+    setPendingFiles(prev => prev.filter((_, i) => i !== index));
+  };
+  
+  const uploadFiles = async () => {
+    const toUpload = pendingFiles.filter(f => f.status === 'pending');
+    if (toUpload.length === 0) return;
+    
+    setIsUploading(true);
+    
+    try {
+      const uploadFn = type === 'model' 
+        ? intakeApi.uploadFiles 
+        : intakeApi.uploadContextFiles;
+      
+      const response = await uploadFn(draftId, toUpload.map(f => f.file));
+      
+      const results = new Map(
+        response.uploaded_files.map(f => [f.name, f.status === 'uploaded'])
+      );
+      
+      setPendingFiles(prev => prev.map(f => {
+        if (f.status !== 'pending') return f;
+        const success = results.get(f.file.name);
+        return {
+          ...f,
+          status: success ? 'success' : 'error',
+          message: success ? undefined : 'Upload failed',
+        };
+      }));
+      
+      setTimeout(() => {
+        setPendingFiles(prev => prev.filter(f => f.status !== 'success'));
+        onUploadComplete();
+      }, 1000);
+      
+    } catch (err) {
+      setPendingFiles(prev => prev.map(f => 
+        f.status === 'pending' 
+          ? { ...f, status: 'error', message: 'Upload failed' }
+          : f
+      ));
+    } finally {
+      setIsUploading(false);
+    }
+  };
+  
+  // Auto-upload when files are added
+  React.useEffect(() => {
+    const pending = pendingFiles.filter(f => f.status === 'pending');
+    if (pending.length > 0 && !isUploading) {
+      uploadFiles();
+    }
+  }, [pendingFiles, isUploading]);
+  
+  return (
+    <div className="space-y-2">
+      {/* Drop Zone */}
+      <div
+        onDragEnter={handleDragEnter}
+        onDragLeave={handleDragLeave}
+        onDragOver={handleDragOver}
+        onDrop={handleDrop}
+        onClick={() => fileInputRef.current?.click()}
+        className={`
+          relative border-2 border-dashed rounded-lg p-4 cursor-pointer
+          transition-all duration-200 text-center
+          ${isDragging 
+            ? 'border-primary-400 bg-primary-400/5' 
+            : 'border-dark-600 hover:border-primary-400/50 hover:bg-white/5'
+          }
+        `}
+      >
+        <div className={`w-8 h-8 rounded-full flex items-center justify-center mx-auto mb-2
+                        ${isDragging ? 'bg-primary-400/20 text-primary-400' : 'bg-dark-700 text-dark-400'}`}>
+          <Upload className="w-4 h-4" />
+        </div>
+        <p className="text-sm text-dark-300">
+          {isDragging ? 'Drop files here' : 'Drop or click to add'}
+        </p>
+        <p className="text-xs text-dark-500 mt-1">
+          {validExtensions.join(', ')}
+        </p>
+      </div>
+      
+      {/* Existing Files */}
+      {files.length > 0 && (
+        <div className="space-y-1">
+          {files.map((name, i) => (
+            <div
+              key={i}
+              className="flex items-center gap-2 px-2 py-1.5 rounded bg-dark-700/50 text-sm"
+            >
+              <File className="w-3.5 h-3.5 text-dark-400" />
+              <span className="text-dark-200 truncate flex-1">{name}</span>
+              <CheckCircle className="w-3.5 h-3.5 text-green-400" />
+            </div>
+          ))}
+        </div>
+      )}
+      
+      {/* Pending Files */}
+      {pendingFiles.length > 0 && (
+        <div className="space-y-1">
+          {pendingFiles.map((f, i) => (
+            <div
+              key={i}
+              className={`flex items-center gap-2 px-2 py-1.5 rounded text-sm
+                         ${f.status === 'error' ? 'bg-red-500/10' : 
+                           f.status === 'success' ? 'bg-green-500/10' : 'bg-dark-700'}`}
+            >
+              {f.status === 'pending' && <Loader2 className="w-3.5 h-3.5 text-primary-400 animate-spin" />}
+              {f.status === 'uploading' && <Loader2 className="w-3.5 h-3.5 text-primary-400 animate-spin" />}
+              {f.status === 'success' && <CheckCircle className="w-3.5 h-3.5 text-green-400" />}
+              {f.status === 'error' && <AlertCircle className="w-3.5 h-3.5 text-red-400" />}
+              <span className={`truncate flex-1 ${f.status === 'error' ? 'text-red-400' : 'text-dark-200'}`}>
+                {f.file.name}
+              </span>
+              {f.message && (
+                <span className="text-xs text-red-400">({f.message})</span>
+              )}
+              {f.status === 'pending' && (
+                <button onClick={(e) => { e.stopPropagation(); removeFile(i); }} className="p-0.5 hover:bg-white/10 rounded">
+                  <X className="w-3 h-3 text-dark-400" />
+                </button>
+              )}
+            </div>
+          ))}
+        </div>
+      )}
+      
+      <input
+        ref={fileInputRef}
+        type="file"
+        multiple
+        accept={validExtensions.join(',')}
+        onChange={handleFileSelect}
+        className="hidden"
+      />
+    </div>
+  );
+};
+
+export default StudioDropZone;

atomizer-dashboard/frontend/src/components/studio/StudioParameterList.tsx

@@ -0,0 +1,172 @@
+/**
+ * StudioParameterList - Display and add discovered parameters as design variables
+ */
+
+import React, { useState, useEffect } from 'react';
+import { Plus, Check, SlidersHorizontal, Loader2 } from 'lucide-react';
+import { intakeApi } from '../../api/intake';
+
+interface Expression {
+  name: string;
+  value: number | null;
+  units: string | null;
+  is_candidate: boolean;
+  confidence: number;
+}
+
+interface StudioParameterListProps {
+  draftId: string;
+  onParameterAdded: () => void;
+}
+
+export const StudioParameterList: React.FC<StudioParameterListProps> = ({
+  draftId,
+  onParameterAdded,
+}) => {
+  const [expressions, setExpressions] = useState<Expression[]>([]);
+  const [addedParams, setAddedParams] = useState<Set<string>>(new Set());
+  const [adding, setAdding] = useState<string | null>(null);
+  const [loading, setLoading] = useState(true);
+  
+  // Load expressions from spec introspection
+  useEffect(() => {
+    loadExpressions();
+  }, [draftId]);
+  
+  const loadExpressions = async () => {
+    setLoading(true);
+    try {
+      const data = await intakeApi.getStudioDraft(draftId);
+      const introspection = (data.spec as any)?.model?.introspection;
+      
+      if (introspection?.expressions) {
+        setExpressions(introspection.expressions);
+        
+        // Check which are already added as DVs
+        const existingDVs = new Set<string>(
+          ((data.spec as any)?.design_variables || []).map((dv: any) => dv.expression_name as string)
+        );
+        setAddedParams(existingDVs);
+      }
+    } catch (err) {
+      console.error('Failed to load expressions:', err);
+    } finally {
+      setLoading(false);
+    }
+  };
+  
+  const addAsDesignVariable = async (expressionName: string) => {
+    setAdding(expressionName);
+    
+    try {
+      await intakeApi.createDesignVariables(draftId, [expressionName]);
+      setAddedParams(prev => new Set([...prev, expressionName]));
+      onParameterAdded();
+    } catch (err) {
+      console.error('Failed to add design variable:', err);
+    } finally {
+      setAdding(null);
+    }
+  };
+  
+  // Sort: candidates first, then by confidence
+  const sortedExpressions = [...expressions].sort((a, b) => {
+    if (a.is_candidate !== b.is_candidate) {
+      return b.is_candidate ? 1 : -1;
+    }
+    return (b.confidence || 0) - (a.confidence || 0);
+  });
+  
+  // Show only candidates by default, with option to show all
+  const [showAll, setShowAll] = useState(false);
+  const displayExpressions = showAll 
+    ? sortedExpressions 
+    : sortedExpressions.filter(e => e.is_candidate);
+  
+  if (loading) {
+    return (
+      <div className="flex items-center justify-center py-4">
+        <Loader2 className="w-5 h-5 text-primary-400 animate-spin" />
+      </div>
+    );
+  }
+  
+  if (expressions.length === 0) {
+    return (
+      <p className="text-xs text-dark-500 italic py-2">
+        No expressions found. Try running introspection.
+      </p>
+    );
+  }
+  
+  const candidateCount = expressions.filter(e => e.is_candidate).length;
+  
+  return (
+    <div className="space-y-2">
+      {/* Header with toggle */}
+      <div className="flex items-center justify-between text-xs text-dark-400">
+        <span>{candidateCount} candidates</span>
+        <button
+          onClick={() => setShowAll(!showAll)}
+          className="hover:text-primary-400 transition-colors"
+        >
+          {showAll ? 'Show candidates only' : `Show all (${expressions.length})`}
+        </button>
+      </div>
+      
+      {/* Parameter List */}
+      <div className="space-y-1 max-h-48 overflow-y-auto">
+        {displayExpressions.map((expr) => {
+          const isAdded = addedParams.has(expr.name);
+          const isAdding = adding === expr.name;
+          
+          return (
+            <div
+              key={expr.name}
+              className={`flex items-center gap-2 px-2 py-1.5 rounded text-sm
+                         ${isAdded ? 'bg-green-500/10' : 'bg-dark-700/50 hover:bg-dark-700'}
+                         transition-colors`}
+            >
+              <SlidersHorizontal className="w-3.5 h-3.5 text-dark-400 flex-shrink-0" />
+              <div className="flex-1 min-w-0">
+                <span className={`block truncate ${isAdded ? 'text-green-400' : 'text-dark-200'}`}>
+                  {expr.name}
+                </span>
+                {expr.value !== null && (
+                  <span className="text-xs text-dark-500">
+                    = {expr.value}{expr.units ? ` ${expr.units}` : ''}
+                  </span>
+                )}
+              </div>
+              
+              {isAdded ? (
+                <Check className="w-4 h-4 text-green-400 flex-shrink-0" />
+              ) : (
+                <button
+                  onClick={() => addAsDesignVariable(expr.name)}
+                  disabled={isAdding}
+                  className="p-1 hover:bg-primary-400/20 rounded text-primary-400 transition-colors disabled:opacity-50"
+                  title="Add as design variable"
+                >
+                  {isAdding ? (
+                    <Loader2 className="w-3.5 h-3.5 animate-spin" />
+                  ) : (
+                    <Plus className="w-3.5 h-3.5" />
+                  )}
+                </button>
+              )}
+            </div>
+          );
+        })}
+      </div>
+      
+      {displayExpressions.length === 0 && (
+        <p className="text-xs text-dark-500 italic py-2">
+          No candidate parameters found. Click "Show all" to see all expressions.
+        </p>
+      )}
+    </div>
+  );
+};
+
+export default StudioParameterList;

atomizer-dashboard/frontend/src/components/studio/index.ts

@@ -0,0 +1,11 @@
+/**
+ * Studio Components Index
+ * 
+ * Export all Studio-related components.
+ */
+
+export { StudioDropZone } from './StudioDropZone';
+export { StudioParameterList } from './StudioParameterList';
+export { StudioContextFiles } from './StudioContextFiles';
+export { StudioChat } from './StudioChat';
+export { StudioBuildDialog } from './StudioBuildDialog';

atomizer-dashboard/frontend/src/hooks/index.ts

@@ -3,3 +3,27 @@ export { useCanvasStore } from './useCanvasStore';
 export type { OptimizationConfig } from './useCanvasStore';
 export { useCanvasChat } from './useCanvasChat';
 export { useIntentParser } from './useIntentParser';
+
+// Spec Store (AtomizerSpec v2.0)
+export {
+  useSpecStore,
+  useSpec,
+  useSpecLoading,
+  useSpecError,
+  useSpecValidation,
+  useSelectedNodeId,
+  useSelectedEdgeId,
+  useSpecHash,
+  useSpecIsDirty,
+  useDesignVariables,
+  useExtractors,
+  useObjectives,
+  useConstraints,
+  useCanvasEdges,
+  useSelectedNode,
+} from './useSpecStore';
+
+// WebSocket Sync
+export { useSpecWebSocket } from './useSpecWebSocket';
+export type { ConnectionStatus } from './useSpecWebSocket';
+export { ConnectionStatusIndicator } from '../components/canvas/ConnectionStatusIndicator';

atomizer-dashboard/frontend/src/hooks/useChat.ts

@@ -11,12 +11,25 @@ export interface CanvasState {
   studyPath?: string;
 }
 
+export interface CanvasModification {
+  action: 'add_node' | 'update_node' | 'remove_node' | 'add_edge' | 'remove_edge';
+  nodeType?: string;
+  nodeId?: string;
+  edgeId?: string;
+  data?: Record<string, any>;
+  source?: string;
+  target?: string;
+  position?: { x: number; y: number };
+}
+
 interface UseChatOptions {
   studyId?: string | null;
   mode?: ChatMode;
   useWebSocket?: boolean;
   canvasState?: CanvasState | null;
   onError?: (error: string) => void;
+  onCanvasModification?: (modification: CanvasModification) => void;
+  onSpecUpdated?: (spec: any) => void;  // Called when Claude modifies the spec
 }
 
 interface ChatState {
@@ -35,6 +48,8 @@ export function useChat({
   useWebSocket = true,
   canvasState: initialCanvasState,
   onError,
+  onCanvasModification,
+  onSpecUpdated,
 }: UseChatOptions = {}) {
   const [state, setState] = useState<ChatState>({
     messages: [],
@@ -49,6 +64,23 @@ export function useChat({
   // Track canvas state for sending with messages
   const canvasStateRef = useRef<CanvasState | null>(initialCanvasState || null);
 
+  // Sync mode prop changes to internal state (triggers WebSocket reconnect)
+  useEffect(() => {
+    if (mode !== state.mode) {
+      console.log(`[useChat] Mode prop changed from ${state.mode} to ${mode}, triggering reconnect`);
+      // Close existing WebSocket
+      wsRef.current?.close();
+      wsRef.current = null;
+      // Update internal state to trigger reconnect
+      setState((prev) => ({
+        ...prev,
+        mode,
+        sessionId: null,
+        isConnected: false,
+      }));
+    }
+  }, [mode]);
+
   const abortControllerRef = useRef<AbortController | null>(null);
   const conversationHistoryRef = useRef<Array<{ role: string; content: string }>>([]);
   const wsRef = useRef<WebSocket | null>(null);
@@ -82,9 +114,16 @@ export function useChat({
         const data = await response.json();
         setState((prev) => ({ ...prev, sessionId: data.session_id }));
 
-        // Connect WebSocket
+        // Connect WebSocket - use backend directly in dev mode
         const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
-        const wsUrl = `${protocol}//${window.location.host}/api/claude/sessions/${data.session_id}/ws`;
+        // Use port 8001 to match start-dashboard.bat
+        const backendHost = import.meta.env.DEV ? 'localhost:8001' : window.location.host;
+        // Both modes use the same WebSocket - mode is handled by session config
+        // Power mode uses --dangerously-skip-permissions in CLI
+        // User mode uses --allowedTools to restrict access
+        const wsPath = `/api/claude/sessions/${data.session_id}/ws`;
+        const wsUrl = `${protocol}//${backendHost}${wsPath}`;
+        console.log(`[useChat] Connecting to WebSocket (${state.mode} mode): ${wsUrl}`);
         const ws = new WebSocket(wsUrl);
 
         ws.onopen = () => {
@@ -126,6 +165,9 @@ export function useChat({
 
   // Handle WebSocket messages
   const handleWebSocketMessage = useCallback((data: any) => {
+    // Debug: log all incoming WebSocket messages
+    console.log('[useChat] WebSocket message received:', data.type, data);
+
     switch (data.type) {
       case 'text':
         currentMessageRef.current += data.content || '';
@@ -212,11 +254,51 @@ export function useChat({
         // Canvas state was updated - could show notification
         break;
 
+      case 'canvas_modification':
+        // Assistant wants to modify the canvas (from MCP tools in user mode)
+        console.log('[useChat] Received canvas_modification:', data.modification);
+        if (onCanvasModification && data.modification) {
+          console.log('[useChat] Calling onCanvasModification callback');
+          onCanvasModification(data.modification);
+        } else {
+          console.warn('[useChat] canvas_modification received but no handler or modification:', {
+            hasCallback: !!onCanvasModification,
+            modification: data.modification
+          });
+        }
+        break;
+
+      case 'spec_updated':
+        // Assistant modified the spec - we receive the full updated spec
+        console.log('[useChat] Spec updated by assistant:', data.tool, data.reason);
+        if (onSpecUpdated && data.spec) {
+          // Directly update the canvas with the new spec
+          onSpecUpdated(data.spec);
+        }
+        break;
+
+      case 'spec_modified':
+        // Legacy: Assistant modified the spec directly (from power mode write tools)
+        console.log('[useChat] Spec was modified by assistant (legacy):', data.tool, data.changes);
+        // Treat this as a canvas modification to trigger reload
+        if (onCanvasModification) {
+          // Create a synthetic modification event to trigger canvas refresh
+          onCanvasModification({
+            action: 'add_node',  // Use add_node as it triggers refresh
+            data: {
+              _refresh: true,
+              tool: data.tool,
+              changes: data.changes,
+            },
+          });
+        }
+        break;
+
       case 'pong':
         // Heartbeat response - ignore
         break;
     }
-  }, [onError]);
+  }, [onError, onCanvasModification]);
 
   // Switch mode (requires new session)
   const switchMode = useCallback(async (newMode: ChatMode) => {
@@ -462,6 +544,18 @@ export function useChat({
     }
   }, [useWebSocket]);
 
+  // Notify backend when user edits canvas (so Claude sees the changes)
+  const notifyCanvasEdit = useCallback((spec: any) => {
+    if (useWebSocket && wsRef.current?.readyState === WebSocket.OPEN) {
+      wsRef.current.send(
+        JSON.stringify({
+          type: 'canvas_edit',
+          spec: spec,
+        })
+      );
+    }
+  }, [useWebSocket]);
+
   return {
     messages: state.messages,
     isThinking: state.isThinking,
@@ -475,5 +569,6 @@ export function useChat({
     cancelRequest,
     switchMode,
     updateCanvasState,
+    notifyCanvasEdit,
   };
 }

atomizer-dashboard/frontend/src/hooks/useClaudeCode.ts

@@ -0,0 +1,349 @@
+/**
+ * Hook for Claude Code CLI integration
+ *
+ * Connects to backend that spawns actual Claude Code CLI processes.
+ * This gives full power: file editing, command execution, etc.
+ *
+ * Unlike useChat (which uses MCP tools), this hook:
+ * - Spawns actual Claude Code CLI in the backend
+ * - Has full file system access
+ * - Can edit files directly (not just return instructions)
+ * - Uses Opus 4.5 model
+ * - Has all Claude Code capabilities
+ */
+
+import { useState, useCallback, useRef, useEffect } from 'react';
+import { Message } from '../components/chat/ChatMessage';
+import { useCanvasStore } from './useCanvasStore';
+
+export interface CanvasState {
+  nodes: any[];
+  edges: any[];
+  studyName?: string;
+  studyPath?: string;
+}
+
+interface UseClaudeCodeOptions {
+  studyId?: string | null;
+  canvasState?: CanvasState | null;
+  onError?: (error: string) => void;
+  onCanvasRefresh?: (studyId: string) => void;
+}
+
+interface ClaudeCodeState {
+  messages: Message[];
+  isThinking: boolean;
+  error: string | null;
+  sessionId: string | null;
+  isConnected: boolean;
+  workingDir: string | null;
+}
+
+export function useClaudeCode({
+  studyId,
+  canvasState: initialCanvasState,
+  onError,
+  onCanvasRefresh,
+}: UseClaudeCodeOptions = {}) {
+  const [state, setState] = useState<ClaudeCodeState>({
+    messages: [],
+    isThinking: false,
+    error: null,
+    sessionId: null,
+    isConnected: false,
+    workingDir: null,
+  });
+
+  // Track canvas state for sending with messages
+  const canvasStateRef = useRef<CanvasState | null>(initialCanvasState || null);
+  const wsRef = useRef<WebSocket | null>(null);
+  const currentMessageRef = useRef<string>('');
+  const reconnectAttempts = useRef(0);
+  const maxReconnectAttempts = 3;
+
+  // Keep canvas state in sync with prop changes
+  useEffect(() => {
+    if (initialCanvasState) {
+      canvasStateRef.current = initialCanvasState;
+    }
+  }, [initialCanvasState]);
+
+  // Get canvas store for auto-refresh
+  const { loadFromConfig } = useCanvasStore();
+
+  // Connect to Claude Code WebSocket
+  useEffect(() => {
+    const connect = () => {
+      const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
+      // In development, connect directly to backend (bypass Vite proxy for WebSockets)
+      // Use port 8001 to match start-dashboard.bat
+      const backendHost = import.meta.env.DEV ? 'localhost:8001' : window.location.host;
+
+      // Use study-specific endpoint if studyId provided
+      const wsUrl = studyId
+        ? `${protocol}//${backendHost}/api/claude-code/ws/${encodeURIComponent(studyId)}`
+        : `${protocol}//${backendHost}/api/claude-code/ws`;
+
+      console.log('[ClaudeCode] Connecting to:', wsUrl);
+      const ws = new WebSocket(wsUrl);
+
+      ws.onopen = () => {
+        console.log('[ClaudeCode] Connected');
+        setState((prev) => ({ ...prev, isConnected: true, error: null }));
+        reconnectAttempts.current = 0;
+
+        // If no studyId in URL, send init message
+        if (!studyId) {
+          ws.send(JSON.stringify({ type: 'init', study_id: null }));
+        }
+      };
+
+      ws.onclose = () => {
+        console.log('[ClaudeCode] Disconnected');
+        setState((prev) => ({ ...prev, isConnected: false }));
+
+        // Attempt reconnection
+        if (reconnectAttempts.current < maxReconnectAttempts) {
+          reconnectAttempts.current++;
+          console.log(`[ClaudeCode] Reconnecting... attempt ${reconnectAttempts.current}`);
+          setTimeout(connect, 2000 * reconnectAttempts.current);
+        }
+      };
+
+      ws.onerror = (event) => {
+        console.error('[ClaudeCode] WebSocket error:', event);
+        setState((prev) => ({ ...prev, isConnected: false }));
+        onError?.('Claude Code connection error');
+      };
+
+      ws.onmessage = (event) => {
+        try {
+          const data = JSON.parse(event.data);
+          handleWebSocketMessage(data);
+        } catch (e) {
+          console.error('[ClaudeCode] Failed to parse message:', e);
+        }
+      };
+
+      wsRef.current = ws;
+    };
+
+    connect();
+
+    return () => {
+      reconnectAttempts.current = maxReconnectAttempts; // Prevent reconnection on unmount
+      wsRef.current?.close();
+      wsRef.current = null;
+    };
+  }, [studyId]);
+
+  // Handle WebSocket messages
+  const handleWebSocketMessage = useCallback(
+    (data: any) => {
+      switch (data.type) {
+        case 'initialized':
+          console.log('[ClaudeCode] Session initialized:', data.session_id);
+          setState((prev) => ({
+            ...prev,
+            sessionId: data.session_id,
+            workingDir: data.working_dir || null,
+          }));
+          break;
+
+        case 'text':
+          currentMessageRef.current += data.content || '';
+          setState((prev) => ({
+            ...prev,
+            messages: prev.messages.map((msg, idx) =>
+              idx === prev.messages.length - 1 && msg.role === 'assistant'
+                ? { ...msg, content: currentMessageRef.current }
+                : msg
+            ),
+          }));
+          break;
+
+        case 'done':
+          setState((prev) => ({
+            ...prev,
+            isThinking: false,
+            messages: prev.messages.map((msg, idx) =>
+              idx === prev.messages.length - 1 && msg.role === 'assistant'
+                ? { ...msg, isStreaming: false }
+                : msg
+            ),
+          }));
+          currentMessageRef.current = '';
+          break;
+
+        case 'error':
+          console.error('[ClaudeCode] Error:', data.content);
+          setState((prev) => ({
+            ...prev,
+            isThinking: false,
+            error: data.content || 'Unknown error',
+          }));
+          onError?.(data.content || 'Unknown error');
+          currentMessageRef.current = '';
+          break;
+
+        case 'refresh_canvas':
+          // Claude made file changes - trigger canvas refresh
+          console.log('[ClaudeCode] Canvas refresh requested:', data.reason);
+          if (data.study_id) {
+            onCanvasRefresh?.(data.study_id);
+            reloadCanvasFromStudy(data.study_id);
+          }
+          break;
+
+        case 'canvas_updated':
+          console.log('[ClaudeCode] Canvas state updated');
+          break;
+
+        case 'pong':
+          // Heartbeat response
+          break;
+
+        default:
+          console.log('[ClaudeCode] Unknown message type:', data.type);
+      }
+    },
+    [onError, onCanvasRefresh]
+  );
+
+  // Reload canvas from study config
+  const reloadCanvasFromStudy = useCallback(
+    async (studyIdToReload: string) => {
+      try {
+        console.log('[ClaudeCode] Reloading canvas for study:', studyIdToReload);
+
+        // Fetch fresh config from backend
+        const response = await fetch(`/api/optimization/studies/${encodeURIComponent(studyIdToReload)}/config`);
+        if (!response.ok) {
+          throw new Error(`Failed to fetch config: ${response.status}`);
+        }
+
+        const data = await response.json();
+        const config = data.config; // API returns { config: ..., path: ..., study_id: ... }
+
+        // Reload canvas with new config
+        loadFromConfig(config);
+
+        // Add system message about refresh
+        const refreshMessage: Message = {
+          id: `msg_${Date.now()}_refresh`,
+          role: 'system',
+          content: `Canvas refreshed with latest changes from ${studyIdToReload}`,
+          timestamp: new Date(),
+        };
+
+        setState((prev) => ({
+          ...prev,
+          messages: [...prev.messages, refreshMessage],
+        }));
+      } catch (error) {
+        console.error('[ClaudeCode] Failed to reload canvas:', error);
+      }
+    },
+    [loadFromConfig]
+  );
+
+  const generateMessageId = () => {
+    return `msg_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
+  };
+
+  const sendMessage = useCallback(
+    async (content: string) => {
+      if (!content.trim() || state.isThinking) return;
+
+      if (!wsRef.current || wsRef.current.readyState !== WebSocket.OPEN) {
+        onError?.('Not connected to Claude Code');
+        return;
+      }
+
+      // Add user message
+      const userMessage: Message = {
+        id: generateMessageId(),
+        role: 'user',
+        content: content.trim(),
+        timestamp: new Date(),
+      };
+
+      // Add assistant message placeholder
+      const assistantMessage: Message = {
+        id: generateMessageId(),
+        role: 'assistant',
+        content: '',
+        timestamp: new Date(),
+        isStreaming: true,
+      };
+
+      setState((prev) => ({
+        ...prev,
+        messages: [...prev.messages, userMessage, assistantMessage],
+        isThinking: true,
+        error: null,
+      }));
+
+      // Reset current message tracking
+      currentMessageRef.current = '';
+
+      // Send message via WebSocket with canvas state
+      wsRef.current.send(
+        JSON.stringify({
+          type: 'message',
+          content: content.trim(),
+          canvas_state: canvasStateRef.current || undefined,
+        })
+      );
+    },
+    [state.isThinking, onError]
+  );
+
+  const clearMessages = useCallback(() => {
+    setState((prev) => ({
+      ...prev,
+      messages: [],
+      error: null,
+    }));
+    currentMessageRef.current = '';
+  }, []);
+
+  // Update canvas state (call this when canvas changes)
+  const updateCanvasState = useCallback((newCanvasState: CanvasState | null) => {
+    canvasStateRef.current = newCanvasState;
+
+    // Also send to backend to update context
+    if (wsRef.current?.readyState === WebSocket.OPEN) {
+      wsRef.current.send(
+        JSON.stringify({
+          type: 'set_canvas',
+          canvas_state: newCanvasState,
+        })
+      );
+    }
+  }, []);
+
+  // Send ping to keep connection alive
+  useEffect(() => {
+    const pingInterval = setInterval(() => {
+      if (wsRef.current?.readyState === WebSocket.OPEN) {
+        wsRef.current.send(JSON.stringify({ type: 'ping' }));
+      }
+    }, 30000); // Every 30 seconds
+
+    return () => clearInterval(pingInterval);
+  }, []);
+
+  return {
+    messages: state.messages,
+    isThinking: state.isThinking,
+    error: state.error,
+    sessionId: state.sessionId,
+    isConnected: state.isConnected,
+    workingDir: state.workingDir,
+    sendMessage,
+    clearMessages,
+    updateCanvasState,
+    reloadCanvasFromStudy,
+  };
+}

atomizer-dashboard/frontend/src/hooks/useOptimizationStream.ts

@@ -0,0 +1,335 @@
+/**
+ * useOptimizationStream - Enhanced WebSocket hook for real-time optimization updates
+ * 
+ * This hook provides:
+ * - Real-time trial updates (no polling needed)
+ * - Best trial tracking
+ * - Progress tracking
+ * - Error detection and reporting
+ * - Integration with panel store for error display
+ * - Automatic reconnection
+ * 
+ * Usage:
+ * ```tsx
+ * const { 
+ *   isConnected, 
+ *   progress, 
+ *   bestTrial, 
+ *   recentTrials,
+ *   status 
+ * } = useOptimizationStream(studyId);
+ * ```
+ */
+
+import { useState, useEffect, useCallback, useRef } from 'react';
+import useWebSocket, { ReadyState } from 'react-use-websocket';
+import { usePanelStore } from './usePanelStore';
+
+// ============================================================================
+// Types
+// ============================================================================
+
+export interface TrialData {
+  trial_number: number;
+  trial_num: number;
+  objective: number | null;
+  values: number[];
+  params: Record<string, number>;
+  user_attrs: Record<string, unknown>;
+  source: 'FEA' | 'NN' | string;
+  start_time: string;
+  end_time: string;
+  study_name: string;
+  constraint_satisfied: boolean;
+}
+
+export interface ProgressData {
+  current: number;
+  total: number;
+  percentage: number;
+  fea_count: number;
+  nn_count: number;
+  timestamp: string;
+}
+
+export interface BestTrialData {
+  trial_number: number;
+  value: number;
+  params: Record<string, number>;
+  improvement: number;
+}
+
+export interface ParetoData {
+  pareto_front: Array<{
+    trial_number: number;
+    values: number[];
+    params: Record<string, number>;
+    constraint_satisfied: boolean;
+    source: string;
+  }>;
+  count: number;
+}
+
+export type OptimizationStatus = 'disconnected' | 'connecting' | 'connected' | 'running' | 'paused' | 'completed' | 'failed';
+
+export interface OptimizationStreamState {
+  isConnected: boolean;
+  status: OptimizationStatus;
+  progress: ProgressData | null;
+  bestTrial: BestTrialData | null;
+  recentTrials: TrialData[];
+  paretoFront: ParetoData | null;
+  lastUpdate: number | null;
+  error: string | null;
+}
+
+// ============================================================================
+// Hook
+// ============================================================================
+
+interface UseOptimizationStreamOptions {
+  /** Maximum number of recent trials to keep */
+  maxRecentTrials?: number;
+  /** Callback when a new trial completes */
+  onTrialComplete?: (trial: TrialData) => void;
+  /** Callback when a new best is found */
+  onNewBest?: (best: BestTrialData) => void;
+  /** Callback on progress update */
+  onProgress?: (progress: ProgressData) => void;
+  /** Whether to auto-report errors to the error panel */
+  autoReportErrors?: boolean;
+}
+
+export function useOptimizationStream(
+  studyId: string | null | undefined,
+  options: UseOptimizationStreamOptions = {}
+) {
+  const {
+    maxRecentTrials = 20,
+    onTrialComplete,
+    onNewBest,
+    onProgress,
+    autoReportErrors = true,
+  } = options;
+
+  // Panel store for error reporting
+  const { addError } = usePanelStore();
+
+  // State
+  const [state, setState] = useState<OptimizationStreamState>({
+    isConnected: false,
+    status: 'disconnected',
+    progress: null,
+    bestTrial: null,
+    recentTrials: [],
+    paretoFront: null,
+    lastUpdate: null,
+    error: null,
+  });
+
+  // Track last error timestamp to avoid duplicates
+  const lastErrorTime = useRef<number>(0);
+
+  // Build WebSocket URL
+  const socketUrl = studyId
+    ? `${window.location.protocol === 'https:' ? 'wss:' : 'ws:'}//${
+        import.meta.env.DEV ? 'localhost:8001' : window.location.host
+      }/api/ws/optimization/${encodeURIComponent(studyId)}`
+    : null;
+
+  // WebSocket connection
+  const { sendMessage, lastMessage, readyState } = useWebSocket(socketUrl, {
+    shouldReconnect: () => true,
+    reconnectAttempts: 10,
+    reconnectInterval: 3000,
+    onOpen: () => {
+      console.log('[OptStream] Connected to optimization stream');
+      setState(prev => ({ ...prev, isConnected: true, status: 'connected', error: null }));
+    },
+    onClose: () => {
+      console.log('[OptStream] Disconnected from optimization stream');
+      setState(prev => ({ ...prev, isConnected: false, status: 'disconnected' }));
+    },
+    onError: (event) => {
+      console.error('[OptStream] WebSocket error:', event);
+      setState(prev => ({ ...prev, error: 'WebSocket connection error' }));
+    },
+  });
+
+  // Update connection status
+  useEffect(() => {
+    const statusMap: Record<ReadyState, OptimizationStatus> = {
+      [ReadyState.CONNECTING]: 'connecting',
+      [ReadyState.OPEN]: 'connected',
+      [ReadyState.CLOSING]: 'disconnected',
+      [ReadyState.CLOSED]: 'disconnected',
+      [ReadyState.UNINSTANTIATED]: 'disconnected',
+    };
+    
+    setState(prev => ({
+      ...prev,
+      isConnected: readyState === ReadyState.OPEN,
+      status: prev.status === 'running' || prev.status === 'completed' || prev.status === 'failed'
+        ? prev.status
+        : statusMap[readyState] || 'disconnected',
+    }));
+  }, [readyState]);
+
+  // Process incoming messages
+  useEffect(() => {
+    if (!lastMessage?.data) return;
+
+    try {
+      const message = JSON.parse(lastMessage.data);
+      const { type, data } = message;
+
+      switch (type) {
+        case 'connected':
+          console.log('[OptStream] Connection confirmed:', data.message);
+          break;
+
+        case 'trial_completed':
+          handleTrialComplete(data as TrialData);
+          break;
+
+        case 'new_best':
+          handleNewBest(data as BestTrialData);
+          break;
+
+        case 'progress':
+          handleProgress(data as ProgressData);
+          break;
+
+        case 'pareto_update':
+          handleParetoUpdate(data as ParetoData);
+          break;
+
+        case 'heartbeat':
+        case 'pong':
+          // Keep-alive messages
+          break;
+
+        case 'error':
+          handleError(data);
+          break;
+
+        default:
+          console.log('[OptStream] Unknown message type:', type, data);
+      }
+    } catch (e) {
+      console.error('[OptStream] Failed to parse message:', e);
+    }
+  }, [lastMessage]);
+
+  // Handler functions
+  const handleTrialComplete = useCallback((trial: TrialData) => {
+    setState(prev => {
+      const newTrials = [trial, ...prev.recentTrials].slice(0, maxRecentTrials);
+      return {
+        ...prev,
+        recentTrials: newTrials,
+        lastUpdate: Date.now(),
+        status: 'running',
+      };
+    });
+    
+    onTrialComplete?.(trial);
+  }, [maxRecentTrials, onTrialComplete]);
+
+  const handleNewBest = useCallback((best: BestTrialData) => {
+    setState(prev => ({
+      ...prev,
+      bestTrial: best,
+      lastUpdate: Date.now(),
+    }));
+    
+    onNewBest?.(best);
+  }, [onNewBest]);
+
+  const handleProgress = useCallback((progress: ProgressData) => {
+    setState(prev => {
+      // Determine status based on progress
+      let status: OptimizationStatus = prev.status;
+      if (progress.current > 0 && progress.current < progress.total) {
+        status = 'running';
+      } else if (progress.current >= progress.total) {
+        status = 'completed';
+      }
+      
+      return {
+        ...prev,
+        progress,
+        status,
+        lastUpdate: Date.now(),
+      };
+    });
+    
+    onProgress?.(progress);
+  }, [onProgress]);
+
+  const handleParetoUpdate = useCallback((pareto: ParetoData) => {
+    setState(prev => ({
+      ...prev,
+      paretoFront: pareto,
+      lastUpdate: Date.now(),
+    }));
+  }, []);
+
+  const handleError = useCallback((errorData: { message: string; details?: string; trial?: number }) => {
+    const now = Date.now();
+    
+    // Avoid duplicate errors within 5 seconds
+    if (now - lastErrorTime.current < 5000) return;
+    lastErrorTime.current = now;
+
+    setState(prev => ({
+      ...prev,
+      error: errorData.message,
+      status: 'failed',
+    }));
+
+    if (autoReportErrors) {
+      addError({
+        type: 'system_error',
+        message: errorData.message,
+        details: errorData.details,
+        trial: errorData.trial,
+        recoverable: true,
+        suggestions: ['Check the optimization logs', 'Try restarting the optimization'],
+        timestamp: now,
+      });
+    }
+  }, [autoReportErrors, addError]);
+
+  // Send ping to keep connection alive
+  useEffect(() => {
+    if (readyState !== ReadyState.OPEN) return;
+
+    const interval = setInterval(() => {
+      sendMessage(JSON.stringify({ type: 'ping' }));
+    }, 25000); // Ping every 25 seconds
+
+    return () => clearInterval(interval);
+  }, [readyState, sendMessage]);
+
+  // Reset state when study changes
+  useEffect(() => {
+    setState({
+      isConnected: false,
+      status: 'disconnected',
+      progress: null,
+      bestTrial: null,
+      recentTrials: [],
+      paretoFront: null,
+      lastUpdate: null,
+      error: null,
+    });
+  }, [studyId]);
+
+  return {
+    ...state,
+    sendPing: () => sendMessage(JSON.stringify({ type: 'ping' })),
+  };
+}
+
+export default useOptimizationStream;

atomizer-dashboard/frontend/src/hooks/usePanelStore.ts

@@ -0,0 +1,375 @@
+/**
+ * usePanelStore - Centralized state management for canvas panels
+ * 
+ * This store manages the visibility and state of all panels in the canvas view.
+ * Panels persist their state even when the user clicks elsewhere on the canvas.
+ * 
+ * Panel Types:
+ * - introspection: Model introspection results (floating, draggable)
+ * - validation: Spec validation errors/warnings (floating)
+ * - results: Trial results details (floating)
+ * - error: Error display with recovery options (floating)
+ */
+
+import { create } from 'zustand';
+import { persist } from 'zustand/middleware';
+
+// ============================================================================
+// Types
+// ============================================================================
+
+export interface IntrospectionData {
+  filePath: string;
+  studyId?: string;
+  selectedFile?: string;
+  result?: Record<string, unknown>;
+  isLoading?: boolean;
+  error?: string | null;
+}
+
+export interface ValidationError {
+  code: string;
+  severity: 'error' | 'warning';
+  path: string;
+  message: string;
+  suggestion?: string;
+  nodeId?: string;
+}
+
+export interface ValidationData {
+  valid: boolean;
+  errors: ValidationError[];
+  warnings: ValidationError[];
+  checkedAt: number;
+}
+
+export interface OptimizationError {
+  type: 'nx_crash' | 'solver_fail' | 'extractor_error' | 'config_error' | 'system_error' | 'unknown';
+  trial?: number;
+  message: string;
+  details?: string;
+  recoverable: boolean;
+  suggestions: string[];
+  timestamp: number;
+}
+
+export interface TrialResultData {
+  trialNumber: number;
+  params: Record<string, number>;
+  objectives: Record<string, number>;
+  constraints?: Record<string, { value: number; feasible: boolean }>;
+  isFeasible: boolean;
+  isBest: boolean;
+  timestamp: number;
+}
+
+export interface PanelPosition {
+  x: number;
+  y: number;
+}
+
+export interface PanelState {
+  open: boolean;
+  position?: PanelPosition;
+  minimized?: boolean;
+}
+
+export interface IntrospectionPanelState extends PanelState {
+  data?: IntrospectionData;
+}
+
+export interface ValidationPanelState extends PanelState {
+  data?: ValidationData;
+}
+
+export interface ErrorPanelState extends PanelState {
+  errors: OptimizationError[];
+}
+
+export interface ResultsPanelState extends PanelState {
+  data?: TrialResultData;
+}
+
+// ============================================================================
+// Store Interface
+// ============================================================================
+
+interface PanelStore {
+  // Panel states
+  introspection: IntrospectionPanelState;
+  validation: ValidationPanelState;
+  error: ErrorPanelState;
+  results: ResultsPanelState;
+  
+  // Generic panel actions
+  openPanel: (panel: 'introspection' | 'validation' | 'error' | 'results') => void;
+  closePanel: (panel: 'introspection' | 'validation' | 'error' | 'results') => void;
+  togglePanel: (panel: 'introspection' | 'validation' | 'error' | 'results') => void;
+  minimizePanel: (panel: 'introspection' | 'validation' | 'error' | 'results') => void;
+  setPanelPosition: (panel: 'introspection' | 'validation' | 'error' | 'results', position: PanelPosition) => void;
+  
+  // Introspection-specific actions
+  setIntrospectionData: (data: IntrospectionData) => void;
+  updateIntrospectionResult: (result: Record<string, unknown>) => void;
+  setIntrospectionLoading: (loading: boolean) => void;
+  setIntrospectionError: (error: string | null) => void;
+  setIntrospectionFile: (fileName: string) => void;
+  
+  // Validation-specific actions
+  setValidationData: (data: ValidationData) => void;
+  clearValidation: () => void;
+  
+  // Error-specific actions
+  addError: (error: OptimizationError) => void;
+  clearErrors: () => void;
+  dismissError: (timestamp: number) => void;
+  
+  // Results-specific actions
+  setTrialResult: (data: TrialResultData) => void;
+  clearTrialResult: () => void;
+  
+  // Utility
+  closeAllPanels: () => void;
+  hasOpenPanels: () => boolean;
+}
+
+// ============================================================================
+// Default States
+// ============================================================================
+
+const defaultIntrospection: IntrospectionPanelState = {
+  open: false,
+  position: { x: 100, y: 100 },
+  minimized: false,
+  data: undefined,
+};
+
+const defaultValidation: ValidationPanelState = {
+  open: false,
+  position: { x: 150, y: 150 },
+  minimized: false,
+  data: undefined,
+};
+
+const defaultError: ErrorPanelState = {
+  open: false,
+  position: { x: 200, y: 100 },
+  minimized: false,
+  errors: [],
+};
+
+const defaultResults: ResultsPanelState = {
+  open: false,
+  position: { x: 250, y: 150 },
+  minimized: false,
+  data: undefined,
+};
+
+// ============================================================================
+// Store Implementation
+// ============================================================================
+
+export const usePanelStore = create<PanelStore>()(
+  persist(
+    (set, get) => ({
+      // Initial states
+      introspection: defaultIntrospection,
+      validation: defaultValidation,
+      error: defaultError,
+      results: defaultResults,
+      
+      // Generic panel actions
+      openPanel: (panel) => set((state) => ({
+        [panel]: { ...state[panel], open: true, minimized: false }
+      })),
+      
+      closePanel: (panel) => set((state) => ({
+        [panel]: { ...state[panel], open: false }
+      })),
+      
+      togglePanel: (panel) => set((state) => ({
+        [panel]: { ...state[panel], open: !state[panel].open, minimized: false }
+      })),
+      
+      minimizePanel: (panel) => set((state) => ({
+        [panel]: { ...state[panel], minimized: !state[panel].minimized }
+      })),
+      
+      setPanelPosition: (panel, position) => set((state) => ({
+        [panel]: { ...state[panel], position }
+      })),
+      
+      // Introspection actions
+      setIntrospectionData: (data) => set((state) => ({
+        introspection: { 
+          ...state.introspection, 
+          open: true, 
+          data 
+        }
+      })),
+      
+      updateIntrospectionResult: (result) => set((state) => ({
+        introspection: {
+          ...state.introspection,
+          data: state.introspection.data 
+            ? { ...state.introspection.data, result, isLoading: false, error: null }
+            : undefined
+        }
+      })),
+      
+      setIntrospectionLoading: (loading) => set((state) => ({
+        introspection: {
+          ...state.introspection,
+          data: state.introspection.data
+            ? { ...state.introspection.data, isLoading: loading }
+            : undefined
+        }
+      })),
+      
+      setIntrospectionError: (error) => set((state) => ({
+        introspection: {
+          ...state.introspection,
+          data: state.introspection.data
+            ? { ...state.introspection.data, error, isLoading: false }
+            : undefined
+        }
+      })),
+      
+      setIntrospectionFile: (fileName) => set((state) => ({
+        introspection: {
+          ...state.introspection,
+          data: state.introspection.data
+            ? { ...state.introspection.data, selectedFile: fileName }
+            : undefined
+        }
+      })),
+      
+      // Validation actions
+      setValidationData: (data) => set((state) => ({
+        validation: { 
+          ...state.validation, 
+          open: true, 
+          data 
+        }
+      })),
+      
+      clearValidation: () => set((state) => ({
+        validation: { 
+          ...state.validation, 
+          data: undefined 
+        }
+      })),
+      
+      // Error actions
+      addError: (error) => set((state) => ({
+        error: {
+          ...state.error,
+          open: true,
+          errors: [...state.error.errors, error]
+        }
+      })),
+      
+      clearErrors: () => set((state) => ({
+        error: {
+          ...state.error,
+          errors: [],
+          open: false
+        }
+      })),
+      
+      dismissError: (timestamp) => set((state) => {
+        const newErrors = state.error.errors.filter(e => e.timestamp !== timestamp);
+        return {
+          error: {
+            ...state.error,
+            errors: newErrors,
+            open: newErrors.length > 0
+          }
+        };
+      }),
+      
+      // Results actions
+      setTrialResult: (data) => set((state) => ({
+        results: {
+          ...state.results,
+          open: true,
+          data
+        }
+      })),
+      
+      clearTrialResult: () => set((state) => ({
+        results: {
+          ...state.results,
+          data: undefined,
+          open: false
+        }
+      })),
+      
+      // Utility
+      closeAllPanels: () => set({
+        introspection: { ...get().introspection, open: false },
+        validation: { ...get().validation, open: false },
+        error: { ...get().error, open: false },
+        results: { ...get().results, open: false },
+      }),
+      
+      hasOpenPanels: () => {
+        const state = get();
+        return state.introspection.open || 
+               state.validation.open || 
+               state.error.open || 
+               state.results.open;
+      },
+    }),
+    {
+      name: 'atomizer-panel-store',
+      // Only persist certain fields (not loading states or errors)
+      partialize: (state) => ({
+        introspection: {
+          position: state.introspection.position,
+          // Don't persist open state - start fresh each session
+        },
+        validation: {
+          position: state.validation.position,
+        },
+        error: {
+          position: state.error.position,
+        },
+        results: {
+          position: state.results.position,
+        },
+      }),
+    }
+  )
+);
+
+// ============================================================================
+// Selector Hooks (for convenience)
+// ============================================================================
+
+export const useIntrospectionPanel = () => usePanelStore((state) => state.introspection);
+export const useValidationPanel = () => usePanelStore((state) => state.validation);
+export const useErrorPanel = () => usePanelStore((state) => state.error);
+export const useResultsPanel = () => usePanelStore((state) => state.results);
+
+// Actions
+export const usePanelActions = () => usePanelStore((state) => ({
+  openPanel: state.openPanel,
+  closePanel: state.closePanel,
+  togglePanel: state.togglePanel,
+  minimizePanel: state.minimizePanel,
+  setPanelPosition: state.setPanelPosition,
+  setIntrospectionData: state.setIntrospectionData,
+  updateIntrospectionResult: state.updateIntrospectionResult,
+  setIntrospectionLoading: state.setIntrospectionLoading,
+  setIntrospectionError: state.setIntrospectionError,
+  setIntrospectionFile: state.setIntrospectionFile,
+  setValidationData: state.setValidationData,
+  clearValidation: state.clearValidation,
+  addError: state.addError,
+  clearErrors: state.clearErrors,
+  dismissError: state.dismissError,
+  setTrialResult: state.setTrialResult,
+  clearTrialResult: state.clearTrialResult,
+  closeAllPanels: state.closeAllPanels,
+}));

atomizer-dashboard/frontend/src/hooks/useResizablePanel.ts

@@ -0,0 +1,156 @@
+/**
+ * useResizablePanel - Hook for creating resizable panels with persistence
+ * 
+ * Features:
+ * - Drag to resize
+ * - Min/max constraints
+ * - localStorage persistence
+ * - Double-click to reset to default
+ */
+
+import { useState, useCallback, useEffect, useRef } from 'react';
+
+export interface ResizablePanelConfig {
+  /** Unique key for localStorage persistence */
+  storageKey: string;
+  /** Default width in pixels */
+  defaultWidth: number;
+  /** Minimum width in pixels */
+  minWidth: number;
+  /** Maximum width in pixels */
+  maxWidth: number;
+  /** Side of the panel ('left' or 'right') - affects resize direction */
+  side: 'left' | 'right';
+}
+
+export interface ResizablePanelState {
+  /** Current width in pixels */
+  width: number;
+  /** Whether user is currently dragging */
+  isDragging: boolean;
+  /** Start drag handler - attach to resize handle mousedown */
+  startDrag: (e: React.MouseEvent) => void;
+  /** Reset to default width */
+  resetWidth: () => void;
+  /** Set width programmatically */
+  setWidth: (width: number) => void;
+}
+
+const STORAGE_PREFIX = 'atomizer-panel-';
+
+function getStoredWidth(key: string, defaultWidth: number): number {
+  if (typeof window === 'undefined') return defaultWidth;
+  
+  try {
+    const stored = localStorage.getItem(STORAGE_PREFIX + key);
+    if (stored) {
+      const parsed = parseInt(stored, 10);
+      if (!isNaN(parsed)) return parsed;
+    }
+  } catch {
+    // localStorage not available
+  }
+  return defaultWidth;
+}
+
+function storeWidth(key: string, width: number): void {
+  if (typeof window === 'undefined') return;
+  
+  try {
+    localStorage.setItem(STORAGE_PREFIX + key, String(width));
+  } catch {
+    // localStorage not available
+  }
+}
+
+export function useResizablePanel(config: ResizablePanelConfig): ResizablePanelState {
+  const { storageKey, defaultWidth, minWidth, maxWidth, side } = config;
+  
+  // Initialize from localStorage
+  const [width, setWidthState] = useState(() => {
+    const stored = getStoredWidth(storageKey, defaultWidth);
+    return Math.max(minWidth, Math.min(maxWidth, stored));
+  });
+  
+  const [isDragging, setIsDragging] = useState(false);
+  
+  // Track initial position for drag calculation
+  const dragStartRef = useRef<{ x: number; width: number } | null>(null);
+  
+  // Clamp width within bounds
+  const clampWidth = useCallback((w: number) => {
+    return Math.max(minWidth, Math.min(maxWidth, w));
+  }, [minWidth, maxWidth]);
+  
+  // Set width with clamping and persistence
+  const setWidth = useCallback((newWidth: number) => {
+    const clamped = clampWidth(newWidth);
+    setWidthState(clamped);
+    storeWidth(storageKey, clamped);
+  }, [clampWidth, storageKey]);
+  
+  // Reset to default
+  const resetWidth = useCallback(() => {
+    setWidth(defaultWidth);
+  }, [defaultWidth, setWidth]);
+  
+  // Start drag handler
+  const startDrag = useCallback((e: React.MouseEvent) => {
+    e.preventDefault();
+    setIsDragging(true);
+    dragStartRef.current = { x: e.clientX, width };
+  }, [width]);
+  
+  // Handle mouse move during drag
+  useEffect(() => {
+    if (!isDragging) return;
+    
+    const handleMouseMove = (e: MouseEvent) => {
+      if (!dragStartRef.current) return;
+      
+      const delta = e.clientX - dragStartRef.current.x;
+      
+      // For left panels, positive delta increases width
+      // For right panels, negative delta increases width
+      const newWidth = side === 'left'
+        ? dragStartRef.current.width + delta
+        : dragStartRef.current.width - delta;
+      
+      setWidthState(clampWidth(newWidth));
+    };
+    
+    const handleMouseUp = () => {
+      if (dragStartRef.current) {
+        // Persist the final width
+        storeWidth(storageKey, width);
+      }
+      setIsDragging(false);
+      dragStartRef.current = null;
+    };
+    
+    // Add listeners to document for smooth dragging
+    document.addEventListener('mousemove', handleMouseMove);
+    document.addEventListener('mouseup', handleMouseUp);
+    
+    // Change cursor globally during drag
+    document.body.style.cursor = 'col-resize';
+    document.body.style.userSelect = 'none';
+    
+    return () => {
+      document.removeEventListener('mousemove', handleMouseMove);
+      document.removeEventListener('mouseup', handleMouseUp);
+      document.body.style.cursor = '';
+      document.body.style.userSelect = '';
+    };
+  }, [isDragging, side, clampWidth, storageKey, width]);
+  
+  return {
+    width,
+    isDragging,
+    startDrag,
+    resetWidth,
+    setWidth,
+  };
+}
+
+export default useResizablePanel;

atomizer-dashboard/frontend/src/hooks/useSpecDraft.ts

@@ -0,0 +1,121 @@
+/**
+ * useSpecDraft (S2 Draft + Publish)
+ *
+ * Local autosave for AtomizerSpec so users don't lose work.
+ * "Publish" still uses useSpecStore.saveSpec() to write atomizer_spec.json.
+ *
+ * NOTE: This is a partial S2 implementation because the current store
+ * still patches the backend during edits. This draft layer still provides:
+ * - crash/refresh protection
+ * - explicit restore/discard prompt
+ */
+
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
+import type { AtomizerSpec } from '../types/atomizer-spec';
+
+const draftKey = (studyId: string) => `atomizer:draft:${studyId}`;
+
+type DraftPayload = {
+  spec: AtomizerSpec;
+  baseHash: string | null;
+  updatedAt: number;
+};
+
+export function useSpecDraft(params: {
+  studyId: string | null | undefined;
+  spec: AtomizerSpec | null | undefined;
+  serverHash: string | null | undefined;
+  enabled?: boolean;
+}) {
+  const { studyId, spec, serverHash, enabled = true } = params;
+
+  const [hasDraft, setHasDraft] = useState(false);
+  const [draft, setDraft] = useState<DraftPayload | null>(null);
+
+  // Debounce writes
+  const writeTimer = useRef<number | null>(null);
+
+  const key = useMemo(() => (studyId ? draftKey(studyId) : null), [studyId]);
+
+  const loadDraft = useCallback(() => {
+    if (!enabled || !key) return null;
+    try {
+      const raw = localStorage.getItem(key);
+      if (!raw) return null;
+      const parsed = JSON.parse(raw) as DraftPayload;
+      if (!parsed?.spec) return null;
+      return parsed;
+    } catch {
+      return null;
+    }
+  }, [enabled, key]);
+
+  const discardDraft = useCallback(() => {
+    if (!enabled || !key) return;
+    localStorage.removeItem(key);
+    setHasDraft(false);
+    setDraft(null);
+  }, [enabled, key]);
+
+  const saveDraftNow = useCallback(
+    (payload: DraftPayload) => {
+      if (!enabled || !key) return;
+      try {
+        localStorage.setItem(key, JSON.stringify(payload));
+        setHasDraft(true);
+        setDraft(payload);
+      } catch {
+        // ignore storage failures
+      }
+    },
+    [enabled, key]
+  );
+
+  // Load draft on study change
+  useEffect(() => {
+    if (!enabled || !key) return;
+    const existing = loadDraft();
+    if (existing) {
+      setHasDraft(true);
+      setDraft(existing);
+    } else {
+      setHasDraft(false);
+      setDraft(null);
+    }
+  }, [enabled, key, loadDraft]);
+
+  // Autosave whenever spec changes
+  useEffect(() => {
+    if (!enabled || !key) return;
+    if (!studyId || !spec) return;
+
+    // Clear existing debounce
+    if (writeTimer.current) {
+      window.clearTimeout(writeTimer.current);
+      writeTimer.current = null;
+    }
+
+    writeTimer.current = window.setTimeout(() => {
+      saveDraftNow({ spec, baseHash: serverHash ?? null, updatedAt: Date.now() });
+    }, 750);
+
+    return () => {
+      if (writeTimer.current) {
+        window.clearTimeout(writeTimer.current);
+        writeTimer.current = null;
+      }
+    };
+  }, [enabled, key, studyId, spec, serverHash, saveDraftNow]);
+
+  return {
+    hasDraft,
+    draft,
+    discardDraft,
+    reloadDraft: () => {
+      const d = loadDraft();
+      setDraft(d);
+      setHasDraft(Boolean(d));
+      return d;
+    },
+  };
+}

atomizer-dashboard/frontend/src/hooks/useSpecStore.ts

@@ -63,6 +63,9 @@ interface SpecStoreActions {
   // WebSocket integration - set spec directly without API call
   setSpecFromWebSocket: (spec: AtomizerSpec, studyId?: string) => void;
 
+  // Local draft integration (S2) - set spec locally (no API call) and mark dirty
+  setSpecLocalDraft: (spec: AtomizerSpec, studyId?: string) => void;
+
   // Full spec operations
   saveSpec: (spec: AtomizerSpec) => Promise<void>;
   replaceSpec: (spec: AtomizerSpec) => Promise<void>;
@@ -402,6 +405,20 @@ export const useSpecStore = create<SpecStore>()(
         });
       },
 
+      // Set spec locally as a draft (no API call). This is used by DraftManager (S2).
+      // Marks the spec as dirty to indicate "not published".
+      setSpecLocalDraft: (spec: AtomizerSpec, studyId?: string) => {
+        const currentStudyId = studyId || get().studyId;
+        console.log('[useSpecStore] Setting spec from local draft:', spec.meta?.study_name);
+        set({
+          spec,
+          studyId: currentStudyId,
+          isLoading: false,
+          isDirty: true,
+          error: null,
+        });
+      },
+
       // =====================================================================
       // Full Spec Operations
       // =====================================================================

atomizer-dashboard/frontend/src/hooks/useSpecUndoRedo.ts

@@ -16,7 +16,7 @@
 
 import { useEffect, useRef } from 'react';
 import { useUndoRedo, UndoRedoResult } from './useUndoRedo';
-import { useSpecStore, useSpec, useSpecIsDirty } from './useSpecStore';
+import { useSpecStore, useSpec } from './useSpecStore';
 import { AtomizerSpec } from '../types/atomizer-spec';
 
 const STORAGE_KEY_PREFIX = 'atomizer-spec-history-';
@@ -28,7 +28,6 @@ export interface SpecUndoRedoResult extends UndoRedoResult<AtomizerSpec | null>
 
 export function useSpecUndoRedo(): SpecUndoRedoResult {
   const spec = useSpec();
-  const isDirty = useSpecIsDirty();
   const studyId = useSpecStore((state) => state.studyId);
   const lastSpecRef = useRef<AtomizerSpec | null>(null);
 
@@ -56,13 +55,21 @@ export function useSpecUndoRedo(): SpecUndoRedoResult {
     },
   });
 
-  // Record snapshot when spec changes (and is dirty)
+  // Record snapshot when spec changes
+  // Note: We removed the isDirty check because with auto-save, isDirty is always false
+  // after the API call completes. Instead, we compare the spec directly.
   useEffect(() => {
-    if (spec && isDirty && spec !== lastSpecRef.current) {
-      lastSpecRef.current = spec;
-      undoRedo.recordSnapshot();
+    if (spec && spec !== lastSpecRef.current) {
+      // Deep compare to avoid recording duplicate snapshots
+      const specStr = JSON.stringify(spec);
+      const lastStr = lastSpecRef.current ? JSON.stringify(lastSpecRef.current) : '';
+      
+      if (specStr !== lastStr) {
+        lastSpecRef.current = spec;
+        undoRedo.recordSnapshot();
+      }
     }
-  }, [spec, isDirty, undoRedo]);
+  }, [spec, undoRedo]);
 
   // Clear history when study changes
   useEffect(() => {

atomizer-dashboard/frontend/src/hooks/useSpecWebSocket.ts

@@ -0,0 +1,288 @@
+/**
+ * useSpecWebSocket - WebSocket connection for real-time spec sync
+ *
+ * Connects to the backend WebSocket endpoint for live spec updates.
+ * Handles auto-reconnection, message parsing, and store updates.
+ *
+ * P2.11-P2.14: WebSocket sync implementation
+ */
+
+import { useEffect, useRef, useCallback, useState } from 'react';
+import { useSpecStore } from './useSpecStore';
+
+// ============================================================================
+// Types
+// ============================================================================
+
+export type ConnectionStatus = 'disconnected' | 'connecting' | 'connected' | 'reconnecting';
+
+interface SpecWebSocketMessage {
+  type: 'modification' | 'full_sync' | 'error' | 'ping';
+  payload: unknown;
+}
+
+interface ModificationPayload {
+  operation: 'set' | 'add' | 'remove';
+  path: string;
+  value?: unknown;
+  modified_by: string;
+  timestamp: string;
+  hash: string;
+}
+
+interface ErrorPayload {
+  message: string;
+  code?: string;
+}
+
+interface UseSpecWebSocketOptions {
+  /**
+   * Enable auto-reconnect on disconnect (default: true)
+   */
+  autoReconnect?: boolean;
+
+  /**
+   * Reconnect delay in ms (default: 3000)
+   */
+  reconnectDelay?: number;
+
+  /**
+   * Max reconnect attempts (default: 10)
+   */
+  maxReconnectAttempts?: number;
+
+  /**
+   * Client identifier for tracking modifications (default: 'canvas')
+   */
+  clientId?: string;
+}
+
+interface UseSpecWebSocketReturn {
+  /**
+   * Current connection status
+   */
+  status: ConnectionStatus;
+
+  /**
+   * Manually disconnect
+   */
+  disconnect: () => void;
+
+  /**
+   * Manually reconnect
+   */
+  reconnect: () => void;
+
+  /**
+   * Send a message to the WebSocket (for future use)
+   */
+  send: (message: SpecWebSocketMessage) => void;
+
+  /**
+   * Last error message if any
+   */
+  lastError: string | null;
+}
+
+// ============================================================================
+// Hook
+// ============================================================================
+
+export function useSpecWebSocket(
+  studyId: string | null,
+  options: UseSpecWebSocketOptions = {}
+): UseSpecWebSocketReturn {
+  const {
+    autoReconnect = true,
+    reconnectDelay = 3000,
+    maxReconnectAttempts = 10,
+    clientId = 'canvas',
+  } = options;
+
+  const wsRef = useRef<WebSocket | null>(null);
+  const reconnectAttemptsRef = useRef(0);
+  const reconnectTimeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+
+  const [status, setStatus] = useState<ConnectionStatus>('disconnected');
+  const [lastError, setLastError] = useState<string | null>(null);
+
+  // Get store actions
+  const reloadSpec = useSpecStore((s) => s.reloadSpec);
+  const setError = useSpecStore((s) => s.setError);
+
+  // Build WebSocket URL
+  const getWsUrl = useCallback((id: string): string => {
+    const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
+    const host = window.location.host;
+    return `${protocol}//${host}/api/studies/${encodeURIComponent(id)}/spec/sync?client_id=${clientId}`;
+  }, [clientId]);
+
+  // Handle incoming messages
+  const handleMessage = useCallback((event: MessageEvent) => {
+    try {
+      const message: SpecWebSocketMessage = JSON.parse(event.data);
+
+      switch (message.type) {
+        case 'modification': {
+          const payload = message.payload as ModificationPayload;
+
+          // Skip if this is our own modification
+          if (payload.modified_by === clientId) {
+            return;
+          }
+
+          // Reload spec to get latest state
+          // In a more sophisticated implementation, we could apply the patch locally
+          reloadSpec().catch((err) => {
+            console.error('Failed to reload spec after modification:', err);
+          });
+          break;
+        }
+
+        case 'full_sync': {
+          // Full spec sync requested (e.g., after reconnect)
+          reloadSpec().catch((err) => {
+            console.error('Failed to reload spec during full_sync:', err);
+          });
+          break;
+        }
+
+        case 'error': {
+          const payload = message.payload as ErrorPayload;
+          console.error('WebSocket error:', payload.message);
+          setLastError(payload.message);
+          setError(payload.message);
+          break;
+        }
+
+        case 'ping': {
+          // Keep-alive ping, respond with pong
+          if (wsRef.current?.readyState === WebSocket.OPEN) {
+            wsRef.current.send(JSON.stringify({ type: 'pong' }));
+          }
+          break;
+        }
+
+        default:
+          console.warn('Unknown WebSocket message type:', message.type);
+      }
+    } catch (error) {
+      console.error('Failed to parse WebSocket message:', error);
+    }
+  }, [clientId, reloadSpec, setError]);
+
+  // Connect to WebSocket
+  const connect = useCallback(() => {
+    if (!studyId) return;
+
+    // Clean up existing connection
+    if (wsRef.current) {
+      wsRef.current.close();
+    }
+
+    setStatus('connecting');
+    setLastError(null);
+
+    const url = getWsUrl(studyId);
+    const ws = new WebSocket(url);
+
+    ws.onopen = () => {
+      setStatus('connected');
+      reconnectAttemptsRef.current = 0;
+    };
+
+    ws.onmessage = handleMessage;
+
+    ws.onerror = (event) => {
+      console.error('WebSocket error:', event);
+      setLastError('WebSocket connection error');
+    };
+
+    ws.onclose = (_event) => {
+      setStatus('disconnected');
+
+      // Check if we should reconnect
+      if (autoReconnect && reconnectAttemptsRef.current < maxReconnectAttempts) {
+        reconnectAttemptsRef.current++;
+        setStatus('reconnecting');
+
+        // Clear any existing reconnect timeout
+        if (reconnectTimeoutRef.current) {
+          clearTimeout(reconnectTimeoutRef.current);
+        }
+
+        // Schedule reconnect with exponential backoff
+        const delay = reconnectDelay * Math.min(reconnectAttemptsRef.current, 5);
+        reconnectTimeoutRef.current = setTimeout(() => {
+          connect();
+        }, delay);
+      } else if (reconnectAttemptsRef.current >= maxReconnectAttempts) {
+        setLastError('Max reconnection attempts reached');
+      }
+    };
+
+    wsRef.current = ws;
+  }, [studyId, getWsUrl, handleMessage, autoReconnect, reconnectDelay, maxReconnectAttempts]);
+
+  // Disconnect
+  const disconnect = useCallback(() => {
+    // Clear reconnect timeout
+    if (reconnectTimeoutRef.current) {
+      clearTimeout(reconnectTimeoutRef.current);
+      reconnectTimeoutRef.current = null;
+    }
+
+    // Close WebSocket
+    if (wsRef.current) {
+      wsRef.current.close();
+      wsRef.current = null;
+    }
+
+    reconnectAttemptsRef.current = maxReconnectAttempts; // Prevent auto-reconnect
+    setStatus('disconnected');
+  }, [maxReconnectAttempts]);
+
+  // Reconnect
+  const reconnect = useCallback(() => {
+    reconnectAttemptsRef.current = 0;
+    connect();
+  }, [connect]);
+
+  // Send message
+  const send = useCallback((message: SpecWebSocketMessage) => {
+    if (wsRef.current?.readyState === WebSocket.OPEN) {
+      wsRef.current.send(JSON.stringify(message));
+    } else {
+      console.warn('WebSocket not connected, cannot send message');
+    }
+  }, []);
+
+  // Connect when studyId changes
+  useEffect(() => {
+    if (studyId) {
+      connect();
+    } else {
+      disconnect();
+    }
+
+    return () => {
+      // Cleanup on unmount or studyId change
+      if (reconnectTimeoutRef.current) {
+        clearTimeout(reconnectTimeoutRef.current);
+      }
+      if (wsRef.current) {
+        wsRef.current.close();
+      }
+    };
+  }, [studyId, connect, disconnect]);
+
+  return {
+    status,
+    disconnect,
+    reconnect,
+    send,
+    lastError,
+  };
+}
+
+export default useSpecWebSocket;