# Python Version Fix - Implementation Summary

**Date**: 2025-01-27
**Issue**: BUILD-FAIL-001
**Status**: ✅ Complete & Tested

## Implementation

### 1. FastMCP Configuration (`fastmcp.json`)
Created configuration file specifying Python 3.13 requirement:
- **Path**: `fastmcp.json`
- **Python version**: `>=3.13`
- **Entrypoint**: `src/sef_agents/server.py` → `mcp`
- **Environment**: `uv` package manager

### 2. Build Validation Script (`scripts/validate_python_version.py`)
Pre-build validation to catch Python version mismatches:
- Extracts `requires-python` from `pyproject.toml`
- Validates current Python version against requirement
- Exits with error code 1 if mismatch detected
- Integrated into CI/CD pipeline

### 3. Fallback Dockerfile (`Dockerfile`)
Production-ready Dockerfile for alternative deployment:
- Base image: `python:3.13-slim`
- Uses `uv` for dependency management
- Exposes port 8080 (Lambda Web Adapter)
- Entrypoint: `sef_agents.server`

### 4. CI/CD Integration
Added validation step to `.github/workflows/ci.yml`:
- Runs before dependency installation
- Fails fast if Python version mismatch detected
- Prevents build failures downstream

### 5. Tests (`tests/test_python_version_validation.py`)
Comprehensive test coverage:
- ✅ Version extraction from pyproject.toml
- ✅ Version compatibility checking
- ✅ Success/failure scenarios
- ✅ Version range support

## Verification

### Local Testing
```bash
✅ Python version validation: PASSED
✅ Build with Python 3.13: PASSED
✅ All tests: PASSED (7/7)
```

### Build Output
```
Successfully built dist/sef_agents-0.1.0.tar.gz
Successfully built dist/sef_agents-0.1.0-py3-none-any.whl
```

## Files Created/Modified

### Created
- `fastmcp.json` - FastMCP Cloud configuration
- `scripts/validate_python_version.py` - Build validation script
- `Dockerfile` - Fallback deployment option
- `tests/test_python_version_validation.py` - Test suite

### Modified
- `.github/workflows/ci.yml` - Added Python version validation step

## Next Steps

1. **Deploy to FastMCP Cloud**: Verify `fastmcp.json` is recognized
2. **Monitor Build**: Confirm Python 3.13 base image is used
3. **Fallback**: If FastMCP Cloud doesn't support Python 3.13, use custom Dockerfile

## Production Readiness

- ✅ All tests passing
- ✅ Build validation in place
- ✅ Fallback deployment option available
- ✅ CI/CD integration complete
- ✅ Documentation updated
