fastapi

This skill MUST be loaded when ANY .py file involving FastAPI is being read, reviewed, edited, or created. Also use when the user asks to "create a FastAPI app", "add an API endpoint", "create a REST API", "implement authentication", "add OAuth2", "create Pydantic models", "add request validation", "implement dependency injection", "create API routers", "add middleware", "handle errors in FastAPI", "create background tasks", "add WebSocket endpoints", "implement CRUD operations", "review a FastAPI route", "read a FastAPI file", or mentions FastAPI, Pydantic with FastAPI, async Python APIs, Starlette, or FastAPI patterns.