fastapi-endpoint

Topics in the source

• FastAPI Endpoint Builder
• When to use
• Phase 1: Explore (Plan Mode)
• Project structure
• Existing patterns
• Test patterns
• Phase 2: Interview (AskUserQuestion)
• Round 1: Core endpoint

Use this skill when you need to: Add new API endpoints to an existing FastAPI project Build CRUD operations with proper validation and error handling Set up authenticated endpoints with dependency injection Create async database queries with SQLAlchemy 2.0 Generate complete test coverage for API routes Enter plan mode. Before writing any code, explore the existing project to understand: Find the FastAPI app entry point (main.py, app.py, or app/init.py) Identify the router organization pattern (single file vs routers/ directory) Check for existing models/, schemas/, crud/, or services/ directories Look at pyproject.toml or requirements.txt for installed dependencies How are existing endpoints structured? (function-based vs class-based) What ORM is used? (SQLAlchemy 2.0 async, Tortoise, raw SQL, none) How is the database session managed? (Depends(getdb), middleware, other) What auth pattern exists? (OAuth2PasswordBearer, API key header, custom) Are there existing Pydantic base models or shared schemas? What response format is standard? (direct model, wrapped {"data": ..., "meta": ...}) Where do tests live? (tests/, test.py, test.py) What test client is used? (httpx AsyncClient, TestC

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