FastAPI preset

A reasoning guide the onboard flow uses for FastAPI services. It is a checklist, not a template — detected reality wins.

Signals

• fastapi in pyproject.toml / requirements.txt, an ASGI server (uvicorn, gunicorn with uvicorn.workers), and an app = FastAPI() instance.
• APIRouter modules, async def path operations, and Pydantic models or pydantic-settings.
• Package manager and test runner inferred from the manifest and lockfile that exist.

What to reason about

• The real test command (often pytest with httpx/TestClient) and the lint/type-check gate (ruff, mypy) — captured verbatim.
• Router structure, request → dependency → handler → response model flow, and where settings and secrets live.
• Sync vs async endpoints, blocking calls in the event loop, and Stack-appropriate skills for routers, schemas, and dependencies.

Notes

Capture how the app is assembled (include_router), the run command (uvicorn app.main:app), and whether Alembic manages migrations.