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Add documentation and finalize production-ready features
Co-authored-by: Mte90 <403283+Mte90@users.noreply.github.com>
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CHANGELOG.md

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# PicoCode v0.2.0 - Production-Ready RAG Backend Update
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## Summary
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PicoCode has been upgraded to a production-ready local RAG backend with per-project persistent storage and PyCharm/IDE integration capabilities.
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## Key Changes
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### 1. Per-Project Database Isolation
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- Each project now gets its own SQLite database stored in `~/.picocode/projects/`
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- Project IDs are generated from path hashes for stability
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- Prevents cross-project data leakage
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- Registry database tracks all projects
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**Files Added:**
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- `projects.py` - Project management system
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### 2. PyCharm-Compatible REST API
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New API endpoints for IDE integration:
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- `POST /api/projects` - Create/get project
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- `GET /api/projects` - List all projects
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- `GET /api/projects/{id}` - Get project details
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- `DELETE /api/projects/{id}` - Delete project
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- `POST /api/projects/index` - Index/re-index project
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- `POST /api/query` - Semantic search
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- `POST /api/code` - Code suggestions with RAG
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- `GET /api/health` - Health check
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**Files Added:**
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- `PYCHARM_INTEGRATION.md` - Complete API documentation
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- `example_client.py` - Example Python client
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### 3. Production-Ready Features
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#### Error Handling
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- Comprehensive input validation
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- Proper HTTP status codes (400, 404, 500)
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- Detailed error messages
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- Exception logging
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#### Retry Logic
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- Automatic retry on database locked errors
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- Exponential backoff for retries
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- Configurable retry counts
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#### Connection Management
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- WAL mode for better concurrency
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- Proper connection timeouts
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- Resource cleanup
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- Transaction handling
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#### Logging
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- Structured logging throughout
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- Info, warning, and error levels
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- Request/response logging
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- Performance monitoring ready
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### 4. UI Updates
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- Projects section in web UI
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- Shows project status (created, indexing, ready, error)
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- Project selection interface
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- Real-time status updates
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### 5. Updated Dependencies
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- Added `pydantic>=2.0` for request validation
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- Updated version to 0.2.0
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- Updated project description
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## File Changes
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### Modified Files:
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1. `main.py` - Added API endpoints and project support
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2. `README.md` - Updated with new features and quick start
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3. `pyproject.toml` - Version bump and new dependencies
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4. `templates/index.html` - Added projects UI
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5. `.gitignore` - Ignore per-project databases
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### New Files:
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1. `projects.py` - Project management system (284 lines)
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2. `PYCHARM_INTEGRATION.md` - API documentation (270 lines)
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3. `example_client.py` - Example API client (240 lines)
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## Testing
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All features have been tested:
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- ✓ Health endpoint
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- ✓ Project creation and retrieval
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- ✓ Project listing
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- ✓ Project deletion
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- ✓ Error handling for invalid inputs
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- ✓ API endpoint structure
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- ✓ Import validation
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- ✓ Route registration
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## Usage Example
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```python
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from example_client import PicoCodeClient
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client = PicoCodeClient()
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# Create project
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project = client.create_project("/path/to/project", "My Project")
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# Index project
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client.index_project(project["id"])
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# Query
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results = client.query(project["id"], "how does auth work?")
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# Get code suggestion
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suggestion = client.get_code_suggestion(project["id"], "explain auth")
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```
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## API Integration
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The REST API is designed for IDE plugins:
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1. **On Project Open**: Create/get project via API
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2. **Background Indexing**: Start indexing asynchronously
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3. **Code Assistance**: Query endpoint for semantic search
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4. **Code Completion**: Code endpoint with RAG context
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## Benefits
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### For Users:
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- Isolated project data
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- No cross-project contamination
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- Better performance with per-project databases
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- RESTful API for custom tools
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### For Developers:
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- Clear API contracts with Pydantic models
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- Comprehensive error handling
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- Production-ready code
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- Easy to integrate with IDEs
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### For Operations:
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- Health check endpoint for monitoring
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- Structured logging
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- Retry logic for reliability
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- WAL mode for concurrency
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## Backward Compatibility
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The existing web UI and analysis features remain fully functional. The single `codebase.db` is still used for the web UI workflow. New API endpoints are additive and don't break existing functionality.
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## Future Enhancements
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Potential additions for future versions:
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- Authentication/authorization
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- Rate limiting
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- Metrics/telemetry
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- WebSocket support for real-time updates
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- Full-text search in addition to semantic search
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- Code snippet extraction in query results
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- Project settings UI
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- Bulk project operations
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## Migration Guide
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No migration needed for existing users. New features are opt-in via the API. To use per-project storage:
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1. Use the API endpoints instead of the web UI analyze button
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2. Each project gets its own database automatically
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3. Old `codebase.db` remains for web UI usage
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## Documentation
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- `README.md` - Overview and quick start
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- `PYCHARM_INTEGRATION.md` - Complete API reference
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- `example_client.py` - Working examples
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- `.env.example` - Configuration reference
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## Conclusion
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PicoCode v0.2.0 is a significant upgrade that transforms PicoCode from a simple web tool into a production-ready RAG backend suitable for IDE integration and enterprise use.

README.md

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- If you use Astral `uv`, install/configure `uv` according to the official docs:
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https://docs.astral.sh/uv/
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## Quick Start with API
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PicoCode now provides a production-ready REST API for IDE integration:
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```python
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import requests
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# 1. Start the server
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# python main.py
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# 2. Create/get a project
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response = requests.post("http://127.0.0.1:8000/api/projects",
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json={"path": "/path/to/your/project", "name": "My Project"})
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project = response.json()
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project_id = project["id"]
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# 3. Index the project
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requests.post("http://127.0.0.1:8000/api/projects/index",
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json={"project_id": project_id})
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# 4. Query your codebase
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response = requests.post("http://127.0.0.1:8000/api/query",
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json={"project_id": project_id, "query": "authentication flow"})
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results = response.json()
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# 5. Get code suggestions
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response = requests.post("http://127.0.0.1:8000/api/code",
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json={"project_id": project_id, "prompt": "Explain the auth system"})
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suggestion = response.json()
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```
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See [PYCHARM_INTEGRATION.md](PYCHARM_INTEGRATION.md) for complete API documentation.
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## Installation and run commands
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First step: Example .env (copy `.env.example` -> `.env` and edit)

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