# DevLoop - Closed-Loop Development System

## Overview

DevLoop is Atomizer's autonomous development cycle system that coordinates AI agents and automated testing to create a closed-loop development workflow.

**Key Features:**
- Uses your existing CLI subscriptions - no API keys needed
- Playwright browser testing for UI verification
- Multiple test types: API, browser, CLI, filesystem
- Automatic analysis and fix iterations
- Persistent state in `.devloop/` directory

```
+-----------------------------------------------------------------------------+
|                    ATOMIZER DEVLOOP - CLOSED-LOOP DEVELOPMENT               |
+-----------------------------------------------------------------------------+
|                                                                             |
|   +----------+     +----------+     +----------+     +----------+          |
|   |  PLAN    |---->|  BUILD   |---->|  TEST    |---->| ANALYZE  |          |
|   | Gemini   |     | Claude   |     | Playwright|    |  Gemini  |          |
|   | OpenCode |     | CLI      |     | + API    |     | OpenCode |          |
|   +----------+     +----------+     +----------+     +----------+          |
|        ^                                                   |                |
|        |                                                   |                |
|        +---------------------------------------------------+                |
|                          FIX LOOP (max iterations)                          |
+-----------------------------------------------------------------------------+
```

## Quick Start

### CLI Commands

```bash
# Full development cycle
python tools/devloop_cli.py start "Create new bracket study"

# Step-by-step execution
python tools/devloop_cli.py plan "Fix dashboard validation"
python tools/devloop_cli.py implement
python tools/devloop_cli.py test --study support_arm
python tools/devloop_cli.py analyze

# Browser UI tests (Playwright)
python tools/devloop_cli.py browser                      # Quick smoke test
python tools/devloop_cli.py browser --level home         # Home page tests
python tools/devloop_cli.py browser --level full         # All UI tests
python tools/devloop_cli.py browser --study support_arm  # Study-specific

# Check status
python tools/devloop_cli.py status

# Quick test with support_arm study
python tools/devloop_cli.py quick
```

### Prerequisites

1. **Backend running**: `cd atomizer-dashboard/backend && python -m uvicorn api.main:app --reload --port 8000`
2. **Frontend running**: `cd atomizer-dashboard/frontend && npm run dev`
3. **Playwright browsers installed**: `cd atomizer-dashboard/frontend && npx playwright install chromium`

## Architecture

### Directory Structure

```
optimization_engine/devloop/
+-- __init__.py              # Module exports
+-- orchestrator.py          # DevLoopOrchestrator - full cycle coordination
+-- cli_bridge.py            # DevLoopCLIOrchestrator - CLI-based execution
|   +-- ClaudeCodeCLI        # Claude Code CLI wrapper
|   +-- OpenCodeCLI          # OpenCode (Gemini) CLI wrapper
+-- test_runner.py           # DashboardTestRunner - test execution
+-- browser_scenarios.py     # Pre-built Playwright scenarios
+-- planning.py              # GeminiPlanner - strategic planning
+-- analyzer.py              # ProblemAnalyzer - failure analysis
+-- claude_bridge.py         # ClaudeCodeBridge - Claude API integration

tools/
+-- devloop_cli.py           # CLI entry point

.devloop/                    # Persistent state directory
+-- current_plan.json        # Current planning state
+-- test_results.json        # Latest filesystem/API test results
+-- browser_test_results.json# Latest browser test results
+-- analysis.json            # Latest analysis results
```

### Core Components

| Component | Location | Purpose |
|-----------|----------|---------|
| `DevLoopCLIOrchestrator` | `cli_bridge.py` | CLI-based cycle orchestration |
| `ClaudeCodeCLI` | `cli_bridge.py` | Execute Claude Code CLI commands |
| `OpenCodeCLI` | `cli_bridge.py` | Execute OpenCode (Gemini) CLI commands |
| `DashboardTestRunner` | `test_runner.py` | Run all test types |
| `get_browser_scenarios()` | `browser_scenarios.py` | Pre-built Playwright tests |
| `DevLoopOrchestrator` | `orchestrator.py` | API-based orchestration (WebSocket) |
| `GeminiPlanner` | `planning.py` | Gemini API planning |
| `ProblemAnalyzer` | `analyzer.py` | Failure analysis |

### CLI Tools Configuration

DevLoop uses your existing CLI subscriptions:

```python
# In cli_bridge.py
CLAUDE_PATH = r"C:\Users\antoi\.local\bin\claude.exe"
OPENCODE_PATH = r"C:\Users\antoi\AppData\Roaming\npm\opencode.cmd"
```

## CLI Commands Reference

### `start` - Full Development Cycle

Runs the complete PLAN -> BUILD -> TEST -> ANALYZE -> FIX loop.

```bash
python tools/devloop_cli.py start "Create support_arm study" --max-iterations 5
```

**Arguments:**
- `objective` (required): What to achieve
- `--max-iterations`: Maximum fix iterations (default: 5)

**Flow:**
1. Gemini creates implementation plan
2. Claude Code implements the plan
3. Tests verify implementation
4. If tests fail: Gemini analyzes, Claude fixes, loop
5. Exits on success or max iterations

### `plan` - Create Implementation Plan

Uses Gemini (via OpenCode) to create a strategic plan.

```bash
python tools/devloop_cli.py plan "Fix dashboard validation"
python tools/devloop_cli.py plan "Add new extractor" --context context.json
```

**Output:** Saves plan to `.devloop/current_plan.json`

**Plan structure:**
```json
{
  "objective": "Fix dashboard validation",
  "approach": "Update validation logic in spec_validator.py",
  "tasks": [
    {
      "id": "task_001",
      "description": "Update bounds validation",
      "file": "optimization_engine/config/spec_validator.py",
      "priority": "high"
    }
  ],
  "test_scenarios": [
    {
      "id": "test_001",
      "name": "Validation passes for valid spec",
      "type": "api",
      "steps": [...]
    }
  ],
  "acceptance_criteria": ["All validation tests pass"]
}
```

### `implement` - Execute Plan with Claude Code

Implements the current plan using Claude Code CLI.

```bash
python tools/devloop_cli.py implement
python tools/devloop_cli.py implement --plan custom_plan.json
```

**Arguments:**
- `--plan`: Custom plan file (default: `.devloop/current_plan.json`)

**Output:** Reports files modified and success/failure.

### `test` - Run Tests

Run filesystem, API, or custom tests for a study.

```bash
python tools/devloop_cli.py test --study support_arm
python tools/devloop_cli.py test --scenarios custom_tests.json
```

**Arguments:**
- `--study`: Study name (generates standard tests)
- `--scenarios`: Custom test scenarios JSON file

**Standard study tests:**
1. Study directory exists
2. `atomizer_spec.json` is valid JSON
3. `README.md` exists
4. `run_optimization.py` exists
5. `1_setup/model/` directory exists

**Output:** Saves results to `.devloop/test_results.json`

### `browser` - Run Playwright UI Tests

Run browser-based UI tests using Playwright.

```bash
python tools/devloop_cli.py browser                      # Quick smoke test
python tools/devloop_cli.py browser --level home         # Home page tests  
python tools/devloop_cli.py browser --level full         # All UI tests
python tools/devloop_cli.py browser --level study --study support_arm
```

**Arguments:**
- `--level`: Test level (`quick`, `home`, `full`, `study`)
- `--study`: Study name for study-specific tests

**Test Levels:**

| Level | Tests | Description |
|-------|-------|-------------|
| `quick` | 1 | Smoke test - page loads |
| `home` | 2 | Home page stats + folder expansion |
| `full` | 5+ | All UI + study-specific |
| `study` | 3 | Canvas, dashboard for specific study |

**Output:** Saves results to `.devloop/browser_test_results.json`

### `analyze` - Analyze Test Results

Uses Gemini (via OpenCode) to analyze failures and create fix plans.

```bash
python tools/devloop_cli.py analyze
python tools/devloop_cli.py analyze --results custom_results.json
```

**Arguments:**
- `--results`: Custom results file (default: `.devloop/test_results.json`)

**Output:** Saves analysis to `.devloop/analysis.json`

### `status` - View Current State

Shows the current DevLoop state.

```bash
python tools/devloop_cli.py status
```

**Output:**
```
DevLoop Status
============================================================

Current Plan: Fix dashboard validation
  Tasks: 3

Last Test Results:
  Passed: 4/5

Last Analysis:
  Issues: 1

============================================================
CLI Tools:
  - Claude Code: C:\Users\antoi\.local\bin\claude.exe
  - OpenCode:    C:\Users\antoi\AppData\Roaming\npm\opencode.cmd
```

### `quick` - Quick Test

Runs tests for the `support_arm` study as a quick verification.

```bash
python tools/devloop_cli.py quick
```

## Test Types

### Filesystem Tests

Check files and directories exist, JSON validity, content matching.

```json
{
  "id": "test_fs_001",
  "name": "Study directory exists",
  "type": "filesystem",
  "steps": [
    {"action": "check_exists", "path": "studies/my_study"}
  ],
  "expected_outcome": {"exists": true}
}
```

**Actions:**
- `check_exists` - Verify path exists
- `check_json_valid` - Parse JSON file
- `check_file_contains` - Search for content

### API Tests

Test REST endpoints.

```json
{
  "id": "test_api_001",
  "name": "Get study spec",
  "type": "api",
  "steps": [
    {"action": "get", "endpoint": "/api/studies/my_study/spec"}
  ],
  "expected_outcome": {"status_code": 200}
}
```

**Actions:**
- `get` - HTTP GET
- `post` - HTTP POST with `data`
- `put` - HTTP PUT with `data`
- `delete` - HTTP DELETE

### Browser Tests (Playwright)

Test UI interactions.

```json
{
  "id": "test_browser_001",
  "name": "Canvas loads nodes",
  "type": "browser",
  "steps": [
    {"action": "navigate", "url": "/canvas/support_arm"},
    {"action": "wait_for", "selector": ".react-flow__node"},
    {"action": "click", "selector": "[data-testid='node-dv_001']"}
  ],
  "expected_outcome": {"status": "pass"},
  "timeout_ms": 20000
}
```

**Actions:**
- `navigate` - Go to URL
- `wait_for` - Wait for selector
- `click` - Click element
- `fill` - Fill input with value
- `screenshot` - Take screenshot

### CLI Tests

Execute shell commands.

```json
{
  "id": "test_cli_001",
  "name": "Run optimization test",
  "type": "cli",
  "steps": [
    {"command": "python run_optimization.py --test", "cwd": "studies/my_study"}
  ],
  "expected_outcome": {"returncode": 0}
}
```

## Browser Test Scenarios

Pre-built scenarios in `browser_scenarios.py`:

```python
from optimization_engine.devloop.browser_scenarios import get_browser_scenarios

# Get scenarios by level
scenarios = get_browser_scenarios(level="full", study_name="support_arm")

# Available functions
get_browser_scenarios(level, study_name)  # Main entry point
get_study_browser_scenarios(study_name)   # Study-specific tests
get_ui_verification_scenarios()           # Home page tests
get_chat_verification_scenarios()         # Chat panel tests
```

## Standalone Playwright Tests

In addition to DevLoop integration, you can run standalone Playwright tests:

```bash
cd atomizer-dashboard/frontend

# Run all E2E tests
npm run test:e2e

# Run with Playwright UI
npm run test:e2e:ui

# Run specific test file
npx playwright test tests/e2e/home.spec.ts
```

**Test files:**
- `tests/e2e/home.spec.ts` - Home page tests (8 tests)

## API Integration

DevLoop also provides REST API endpoints when running the dashboard backend:

| Endpoint | Method | Description |
|----------|--------|-------------|
| `/api/devloop/status` | GET | Current loop status |
| `/api/devloop/start` | POST | Start development cycle |
| `/api/devloop/stop` | POST | Stop current cycle |
| `/api/devloop/step` | POST | Execute single phase |
| `/api/devloop/history` | GET | View past cycles |
| `/api/devloop/health` | GET | System health check |
| `/api/devloop/ws` | WebSocket | Real-time updates |

**Start a cycle via API:**
```bash
curl -X POST http://localhost:8000/api/devloop/start \
  -H "Content-Type: application/json" \
  -d '{"objective": "Create support_arm study", "max_iterations": 5}'
```

## State Files

DevLoop maintains state in `.devloop/`:

| File | Purpose | Updated By |
|------|---------|------------|
| `current_plan.json` | Current implementation plan | `plan` command |
| `test_results.json` | Filesystem/API test results | `test` command |
| `browser_test_results.json` | Browser test results | `browser` command |
| `analysis.json` | Failure analysis | `analyze` command |

## Example Workflows

### Create a New Study

```bash
# Full autonomous cycle
python tools/devloop_cli.py start "Create bracket_lightweight study with mass and displacement objectives"

# Or step by step
python tools/devloop_cli.py plan "Create bracket_lightweight study"
python tools/devloop_cli.py implement
python tools/devloop_cli.py test --study bracket_lightweight
python tools/devloop_cli.py browser --study bracket_lightweight
```

### Debug a Dashboard Issue

```bash
# Plan the fix
python tools/devloop_cli.py plan "Fix canvas node selection not updating panel"

# Implement
python tools/devloop_cli.py implement

# Test UI
python tools/devloop_cli.py browser --level full

# If tests fail, analyze
python tools/devloop_cli.py analyze

# Fix and retest loop...
```

### Verify Study Before Running

```bash
# File structure tests
python tools/devloop_cli.py test --study my_study

# Browser tests (canvas loads, etc.)
python tools/devloop_cli.py browser --level study --study my_study
```

## Troubleshooting

### Browser Tests Fail

1. **Ensure frontend is running**: `npm run dev` in `atomizer-dashboard/frontend`
2. **Check port**: DevLoop uses `localhost:3003` (Vite default)
3. **Install browsers**: `npx playwright install chromium`

### CLI Tools Not Found

Check paths in `cli_bridge.py`:
```python
CLAUDE_PATH = r"C:\Users\antoi\.local\bin\claude.exe"
OPENCODE_PATH = r"C:\Users\antoi\AppData\Roaming\npm\opencode.cmd"
```

### API Tests Fail

1. **Ensure backend is running**: Port 8000
2. **Check endpoint paths**: May need `/api/` prefix

### Tests Timeout

Increase timeout in test scenario:
```json
{
  "timeout_ms": 30000
}
```

### Unclosed Client Session Warning

This is a known aiohttp warning on Windows. Tests still pass correctly.

## Integration with LAC

DevLoop records learnings to LAC (Learning Atomizer Core):

```python
from knowledge_base.lac import get_lac

lac = get_lac()

# Record after successful cycle
lac.record_insight(
    category="success_pattern",
    context="DevLoop created support_arm study",
    insight="TPE sampler works well for 4-variable bracket problems",
    confidence=0.9
)
```

## Future Enhancements

1. **Parallel test execution** - Run independent tests concurrently
2. **Visual diff** - Show code changes in dashboard
3. **Smart rollback** - Automatic rollback on regression
4. **Branch management** - Auto-create feature branches
5. **Cost tracking** - Monitor CLI usage