Built-in skill — FastAPI and async Python web services.
Injects a system-prompt section on async def for I/O-bound work, the
receive-an-object/return-an-object Pydantic pattern, Depends() injection for
sessions and auth, lifespan context managers in place of the deprecated
@app.on_event, httpx instead of requests in async code,
asyncio.TaskGroup structured concurrency, asyncio.Semaphore rate limiting,
and guard clauses instead of nested branches.
Activates on prompts containing "fastapi", "fast api", "python api",
"pydantic", "async python", "asyncio" or "uvicorn". Group :coding;
tags :python, :fastapi, :api, :async, :web.