mir-backend-python

Make It Right (Python runtime tier). CPython/PyPy runtime reliability footguns that are shared across EVERY Python backend framework (FastAPI, Django, Flask, Celery) — distinct from the generic backend gates and from any one framework's mechanics. Covers: the GIL (threads give no CPU parallelism), async-vs-sync 'coloring', blocking the event loop, choosing asyncio vs threads vs multiprocessing vs a worker queue, fork-safety of connection pools, serverless cold starts, and dropped-task exceptions. TRIGGER when the backend runtime is Python — sits between mir-backend (generic) and the framework module (e.g. mir-backend-python-fastapi). SKIP for Node/JVM/Go/Rust/.NET/Ruby/PHP/BEAM runtimes (each has its own mir-backend-<runtime> tier), and for framework-library mechanics (those live in the framework module).