Build production FastAPI services with Pydantic v2 models, async-safe I/O, dependency injection, OpenAPI, webhook raw-body routes, and structured errors. Use for JSON APIs, Stripe webhooks, and TestClient/httpx testing.
Install
npx skills add alivirgo/Major-AI-Skills --skill fastapinpx skills add alivirgo/Major-AI-Skills --skill fastapi -a claude-code -gnpx skills add alivirgo/Major-AI-Skills --skill fastapi -a codex -ggemini skills install https://github.com/alivirgo/Major-AI-Skills.git --path skills/fastapigh skill install alivirgo/Major-AI-Skills fastapigit clone --depth 1 https://github.com/alivirgo/Major-AI-Skills /tmp/alivirgo__Major-AI-Skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/alivirgo__Major-AI-Skills/skills/fastapi ~/.claude/skills/fastapi # Claude Code
cp -R /tmp/alivirgo__Major-AI-Skills/skills/fastapi ~/.agents/skills/fastapi # Codex, Cursor, Gemini CLI, Copilot, OpenCode