FastAPI Patterns and Best Practices

Purpose

This skill provides comprehensive guidance for building production-ready FastAPI applications. Reference this skill when:

• Reviewing FastAPI code
• Designing API endpoints and structures
• Implementing authentication and authorization
• Integrating databases with async patterns
• Writing tests for FastAPI applications
• Optimizing API performance
• Setting up dependency injection
• Validating request/response models

Context

FastAPI is a modern, high-performance Python web framework built on Starlette and Pydantic. It leverages Python 3.6+ type hints to provide automatic request validation, serialization, and OpenAPI documentation generation. FastAPI is designed for async-first development, making it ideal for I/O-bound operations.

Core Principles