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fastapi-patterns
FastAPI best practices covering project structure, Pydantic v2 schemas, dependency injection, async handlers, authentication, authorization, transactional service layers, and testing with httpx and pytest. Use when building or reviewing FastAPI apps — Pydantic schemas, dependencies, async handlers, auth, or tests.
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# FastAPI Patterns
Modern, production-grade FastAPI development: project layout, Pydantic v2 schemas, dependency injection, async patterns, auth, transactional service methods, and testing.
## Project Structure
```text
my_app/
|-- app/
| |-- main.py # App factory, lifespan, middleware
| |-- config.py # Settings via pydantic-settings
| |-- dependencies.py # Shared FastAPI dependencies
| |-- database.py # SQLAlchemy engine + session
| |-- routers/