Jason Woltje
9f3c76d43b
Add comprehensive cost optimization test scenarios and validation report. Test Scenarios Added (10 new tests): - Low difficulty assigns to MiniMax/GLM (free agents) - Medium difficulty assigns to GLM when within capacity - High difficulty assigns to Opus (only capable agent) - Oversized issues rejected with actionable error - Boundary conditions at capacity limits - Aggregate cost optimization across all scenarios Results: - All 33 tests passing (23 existing + 10 new) - 100% coverage of agent_assignment.py (36/36 statements) - Cost savings validation: 50%+ in aggregate scenarios - Real-world projection: 70%+ savings with typical workload Documentation: - Created cost-optimization-validation.md with detailed analysis - Documents cost savings for each scenario - Validates all acceptance criteria from COORD-006 Completes Phase 2 (M4.1-Coordinator) testing requirements. Fixes #146 Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Mosaic Coordinator
FastAPI webhook receiver for Gitea issue events, enabling autonomous task coordination for AI agents.
Overview
The coordinator receives webhook events from Gitea when issues are assigned, unassigned, or closed. It verifies webhook authenticity via HMAC SHA256 signature and routes events to appropriate handlers.
Features
- HMAC SHA256 signature verification
- Event routing (assigned, unassigned, closed)
- AI-powered issue metadata parsing (using Anthropic Sonnet)
- Context estimation and agent assignment
- Dependency tracking (blocks/blocked_by)
- Comprehensive logging
- Health check endpoint
- Docker containerized
- 95%+ test coverage
Development
Prerequisites
- Python 3.11+
- pip or uv package manager
Setup
# Install dependencies
pip install -e ".[dev]"
# Run tests
pytest
# Run with coverage
pytest --cov=src --cov-report=html
# Type checking
mypy src/
# Linting
ruff check src/
Running locally
# Copy environment template
cp .env.example .env
# Edit .env with your values
# GITEA_WEBHOOK_SECRET, GITEA_URL, ANTHROPIC_API_KEY
# Run server
uvicorn src.main:app --reload --port 8000
API Endpoints
POST /webhook/gitea
Receives Gitea webhook events.
Headers:
X-Gitea-Signature: HMAC SHA256 signature of request body
Response:
200 OK: Event processed successfully401 Unauthorized: Invalid or missing signature422 Unprocessable Entity: Invalid payload
GET /health
Health check endpoint.
Response:
200 OK: Service is healthy
Environment Variables
| Variable | Description | Required | Default |
|---|---|---|---|
GITEA_WEBHOOK_SECRET |
Secret for HMAC signature verification | Yes | - |
GITEA_URL |
Gitea instance URL | Yes | - |
ANTHROPIC_API_KEY |
Anthropic API key for issue parsing | Yes | - |
LOG_LEVEL |
Logging level (debug, info, warning, error) | No | info |
HOST |
Server host | No | 0.0.0.0 |
PORT |
Server port | No | 8000 |
Docker
# Build
docker build -t mosaic-coordinator .
# Run
docker run -p 8000:8000 \
-e GITEA_WEBHOOK_SECRET="your-secret" \
-e GITEA_URL="https://git.mosaicstack.dev" \
-e ANTHROPIC_API_KEY="your-anthropic-key" \
mosaic-coordinator
Testing
# Run all tests
pytest
# Run with coverage (requires 85%+)
pytest --cov=src --cov-report=term-missing
# Run specific test file
pytest tests/test_security.py
# Run with verbose output
pytest -v
Architecture
apps/coordinator/
├── src/
│ ├── main.py # FastAPI application
│ ├── webhook.py # Webhook endpoint handlers
│ ├── parser.py # Issue metadata parser (Anthropic)
│ ├── models.py # Data models
│ ├── security.py # HMAC signature verification
│ ├── config.py # Configuration management
│ └── context_monitor.py # Context usage monitoring
├── tests/
│ ├── test_security.py
│ ├── test_webhook.py
│ ├── test_parser.py
│ ├── test_context_monitor.py
│ └── conftest.py # Pytest fixtures
├── pyproject.toml # Project metadata & dependencies
├── .env.example # Environment variable template
├── Dockerfile
└── README.md
Related Issues
- #156 - Create coordinator bot user
- #157 - Set up webhook receiver endpoint
- #158 - Implement issue parser
- #140 - Coordinator architecture