"""
Shunts - Fake connectors for testing.

A shunt redirects flow when the real service isn't available.
Each shunt mimics a vein's interface with configurable responses.

Structure:
    shunts/<service>/
    ├── main.py         # FastAPI with config UI
    ├── depot/
    │   └── responses.json  # Configurable fake responses
    └── README.md

Usage:
    1. Start the shunt instead of the real vein
    2. Configure responses via the UI or responses.json
    3. Run tests against the shunt
"""