# Phase 3.2 Integration Status

> **Date**: 2025-11-17
> **Status**: Partially Complete - Framework Ready, API Integration Pending

---

## Overview

Phase 3.2 aims to integrate the LLM components (Phases 2.5-3.1) into the production optimization workflow, enabling users to run optimizations using natural language requests.

**Goal**: Enable users to run:
```bash
python run_optimization.py --llm "maximize displacement, ensure safety factor > 4"
```

---

## What's Been Completed ✅

### 1. Generic Optimization Runner (`optimization_engine/run_optimization.py`)

**Created**: 2025-11-17

A flexible, command-line driven optimization runner supporting both LLM and manual modes:

```bash
# LLM Mode (Natural Language)
python optimization_engine/run_optimization.py \
    --llm "maximize displacement, ensure safety factor > 4" \
    --prt model/Bracket.prt \
    --sim model/Bracket_sim1.sim \
    --trials 20

# Manual Mode (JSON Config)
python optimization_engine/run_optimization.py \
    --config config.json \
    --prt model/Bracket.prt \
    --sim model/Bracket_sim1.sim \
    --trials 50
```

**Features**:
- ✅ Command-line argument parsing (`--llm`, `--config`, `--prt`, `--sim`, etc.)
- ✅ Integration with `LLMWorkflowAnalyzer` for natural language parsing
- ✅ Integration with `LLMOptimizationRunner` for automated extractor/hook generation
- ✅ Proper error handling and user feedback
- ✅ Comprehensive help message with examples
- ✅ Flexible output directory and study naming

**Files**:
- [optimization_engine/run_optimization.py](../optimization_engine/run_optimization.py) - Generic runner
- [tests/test_phase_3_2_llm_mode.py](../tests/test_phase_3_2_llm_mode.py) - Integration tests

### 2. Test Suite

**Test Results**: ✅ All tests passing

Tests verify:
- Argument parsing works correctly
- Help message displays `--llm` flag
- Framework is ready for LLM integration

---

## Current Limitation ⚠️

### LLM Workflow Analysis Requires API Key

The `LLMWorkflowAnalyzer` currently requires an Anthropic API key to actually parse natural language requests. The `use_claude_code` flag exists but **doesn't implement actual integration** with Claude Code's AI capabilities.

**Current Behavior**:
- `--llm` mode is implemented in the CLI
- But `LLMWorkflowAnalyzer.analyze_request()` returns empty workflow when `use_claude_code=True` and no API key provided
- Actual LLM analysis requires `--api-key` argument

**Workaround Options**:

#### Option 1: Use Anthropic API Key
```bash
python run_optimization.py \
    --llm "maximize displacement" \
    --prt model/part.prt \
    --sim model/sim.sim \
    --api-key "sk-ant-..."
```

#### Option 2: Pre-Generate Workflow JSON (Hybrid Approach)
1. Use Claude Code to help create workflow JSON manually
2. Save as `llm_workflow.json`
3. Load and use with `LLMOptimizationRunner`

Example:
```python
# In your study's run_optimization.py
from optimization_engine.llm_optimization_runner import LLMOptimizationRunner
import json

# Load pre-generated workflow (created with Claude Code assistance)
with open('llm_workflow.json', 'r') as f:
    llm_workflow = json.load(f)

# Run optimization with LLM runner
runner = LLMOptimizationRunner(
    llm_workflow=llm_workflow,
    model_updater=model_updater,
    simulation_runner=simulation_runner,
    study_name='my_study'
)

results = runner.run_optimization(n_trials=20)
```

#### Option 3: Use Existing Study Scripts
The bracket study's `run_optimization.py` already demonstrates the complete workflow with hardcoded configuration - this works perfectly!

---

## Architecture

### LLM Mode Flow (When API Key Provided)

```
User Natural Language Request
    ↓
LLMWorkflowAnalyzer (Phase 2.7)
    ├─> Claude API call
    └─> Parse to structured workflow JSON
        ↓
LLMOptimizationRunner (Phase 3.2)
    ├─> ExtractorOrchestrator (Phase 3.1) → Auto-generate extractors
    ├─> InlineCodeGenerator (Phase 2.8) → Auto-generate calculations
    ├─> HookGenerator (Phase 2.9) → Auto-generate hooks
    └─> Run Optuna optimization with generated code
        ↓
Results
```

### Manual Mode Flow (Current Working Approach)

```
Hardcoded Workflow JSON (or manually created)
    ↓
LLMOptimizationRunner (Phase 3.2)
    ├─> ExtractorOrchestrator → Auto-generate extractors
    ├─> InlineCodeGenerator → Auto-generate calculations
    ├─> HookGenerator → Auto-generate hooks
    └─> Run Optuna optimization
        ↓
Results
```

---

## What Works Right Now

### ✅ **LLM Components are Functional**

All individual components work and are tested:

1. **Phase 2.5**: Intelligent Gap Detection ✅
2. **Phase 2.7**: LLM Workflow Analysis (requires API key) ✅
3. **Phase 2.8**: Inline Code Generator ✅
4. **Phase 2.9**: Hook Generator ✅
5. **Phase 3.0**: pyNastran Research Agent ✅
6. **Phase 3.1**: Extractor Orchestrator ✅
7. **Phase 3.2**: LLM Optimization Runner ✅

### ✅ **Generic CLI Runner**

The new `run_optimization.py` provides:
- Clean command-line interface
- Argument validation
- Error handling
- Comprehensive help

### ✅ **Bracket Study Demonstrates End-to-End Workflow**

[studies/bracket_displacement_maximizing/run_optimization.py](../studies/bracket_displacement_maximizing/run_optimization.py) shows the complete integration:
- Wizard-based setup (Phase 3.3)
- LLMOptimizationRunner with hardcoded workflow
- Auto-generated extractors and hooks
- Real NX simulations
- Complete results with reports

---

## Next Steps to Complete Phase 3.2

### Short Term (Can Do Now)

1. **Document Hybrid Approach** ✅ (This document!)
   - Show how to use Claude Code to create workflow JSON
   - Example workflow JSON templates for common use cases

2. **Create Example Workflow JSONs**
   - `examples/llm_workflows/maximize_displacement.json`
   - `examples/llm_workflows/minimize_stress.json`
   - `examples/llm_workflows/multi_objective.json`

3. **Update DEVELOPMENT_GUIDANCE.md**
   - Mark Phase 3.2 as "Partially Complete"
   - Document the API key requirement
   - Provide hybrid approach guidance

### Medium Term (Requires Decision)

**Option A: Implement True Claude Code Integration**
- Modify `LLMWorkflowAnalyzer` to actually interface with Claude Code
- Would require understanding Claude Code's internal API/skill system
- Most aligned with "Development Strategy" (use Claude Code, defer API integration)

**Option B: Defer Until API Integration is Priority**
- Document current state as "Framework Ready"
- Focus on other high-priority items (NXOpen docs, Engineering pipeline)
- Return to full LLM integration when ready to integrate Anthropic API

**Option C: Hybrid Approach (Recommended for Now)**
- Keep generic CLI runner as-is
- Document how to use Claude Code to manually create workflow JSONs
- Use `LLMOptimizationRunner` with pre-generated workflows
- Provides 90% of the value with 10% of the complexity

---

## Recommendation

**For now, adopt Option C (Hybrid Approach)**:

### Why:
1. **Development Strategy Alignment**: We're using Claude Code for development, not integrating API yet
2. **Provides Value**: All automation components (extractors, hooks, calculations) work perfectly
3. **No Blocker**: Users can still leverage LLM components via pre-generated workflows
4. **Flexible**: Can add full API integration later without changing architecture
5. **Focus**: Allows us to prioritize Phase 3.3+ items (NXOpen docs, Engineering pipeline)

### What This Means:
- ✅ Phase 3.2 is "Framework Complete"
- ⚠️ Full natural language CLI requires API key (documented limitation)
- ✅ Hybrid approach (Claude Code → JSON → LLMOptimizationRunner) works today
- 🎯 Can return to full integration when API integration becomes priority

---

## Example: Using Hybrid Approach

### Step 1: Create Workflow JSON (with Claude Code assistance)

```json
{
  "engineering_features": [
    {
      "action": "extract_displacement",
      "domain": "result_extraction",
      "description": "Extract displacement results from OP2 file",
      "params": {"result_type": "displacement"}
    },
    {
      "action": "extract_solid_stress",
      "domain": "result_extraction",
      "description": "Extract von Mises stress from CTETRA elements",
      "params": {
        "result_type": "stress",
        "element_type": "ctetra"
      }
    }
  ],
  "inline_calculations": [
    {
      "action": "calculate_safety_factor",
      "params": {
        "input": "max_von_mises",
        "yield_strength": 276.0,
        "operation": "divide"
      },
      "code_hint": "safety_factor = 276.0 / max_von_mises"
    }
  ],
  "post_processing_hooks": [],
  "optimization": {
    "algorithm": "TPE",
    "direction": "minimize",
    "design_variables": [
      {
        "parameter": "thickness",
        "min": 3.0,
        "max": 10.0,
        "units": "mm"
      }
    ]
  }
}
```

### Step 2: Use in Python Script

```python
import json
from pathlib import Path
from optimization_engine.llm_optimization_runner import LLMOptimizationRunner
from optimization_engine.nx_updater import NXParameterUpdater
from optimization_engine.nx_solver import NXSolver

# Load pre-generated workflow
with open('llm_workflow.json', 'r') as f:
    workflow = json.load(f)

# Setup model updater
updater = NXParameterUpdater(prt_file_path=Path("model/part.prt"))
def model_updater(design_vars):
    updater.update_expressions(design_vars)
    updater.save()

# Setup simulation runner
solver = NXSolver(nastran_version='2412', use_journal=True)
def simulation_runner(design_vars) -> Path:
    result = solver.run_simulation(Path("model/sim.sim"), expression_updates=design_vars)
    return result['op2_file']

# Run optimization
runner = LLMOptimizationRunner(
    llm_workflow=workflow,
    model_updater=model_updater,
    simulation_runner=simulation_runner,
    study_name='my_optimization'
)

results = runner.run_optimization(n_trials=20)
print(f"Best design: {results['best_params']}")
```

---

## References

- [DEVELOPMENT_GUIDANCE.md](../DEVELOPMENT_GUIDANCE.md) - Strategic direction
- [optimization_engine/run_optimization.py](../optimization_engine/run_optimization.py) - Generic CLI runner
- [optimization_engine/llm_optimization_runner.py](../optimization_engine/llm_optimization_runner.py) - LLM runner
- [optimization_engine/llm_workflow_analyzer.py](../optimization_engine/llm_workflow_analyzer.py) - Workflow analyzer
- [studies/bracket_displacement_maximizing/run_optimization.py](../studies/bracket_displacement_maximizing/run_optimization.py) - Complete example

---

**Document Maintained By**: Antoine Letarte
**Last Updated**: 2025-11-17
**Status**: Framework Complete, API Integration Pending
