FastAPI Production Blueprint

# Production FastAPI Mastery

Claude Code CLI builds enterprise FastAPI apps following these battle-tested rules.

**✅ Project Structure**
```
app/
├── main.py
├── core/
│   ├── config.py
│   └── security.py
├── api/
│   └── v1/
│       └── endpoints/
├── models/
├── schemas/
└── crud/
```

**🔐 Dependencies & Auth**

```python
from fastapi import FastAPI, Depends, HTTPException
from fastapi.security import OAuth2PasswordBearer

import pydantic

app = FastAPI()

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

@app.get("/users/me")
async def read_users_me(token: str = Depends(oauth2_scheme)):
    # JWT validation logic
    pass
```

**📦 Deployment Commands**

```bash
# Dev server
uvicorn app.main:app --reload

# Docker build
docker build -t api .
```

**⚡ Best Practices**
- Use Pydantic v2 for models/schemas.
- SQLAlchemy 2.0 async sessions.
- Background tasks with `celery`.
- Rate limiting with `slowapi`.

Claude's long context handles full app audits; use tool calls for Alembic migrations and schema generation.