API Documentation Generator

Point this skill at any API codebase and get a valid OpenAPI 3.0 specification in seconds. It scans route definitions, extracts HTTP methods, path/query parameters, request bodies, response shapes, and authentication requirements — then assembles everything into a spec you can import directly into Swagger UI, Redoc, or Postman.

Supports Express, Fastify, Hono, Next.js (App Router and Pages Router), FastAPI, Flask, and Django REST Framework. Works by pattern-matching route declarations, validation schemas (Zod, Pydantic, TypeScript interfaces, Django serializers), and middleware chains.

Includes automatic tagging by resource, auth detection from middleware patterns, error response schemas, and export to YAML, JSON, Postman collections, and static HTML docs.

Guardrails ensure no fabricated endpoints, no leaked secrets in examples, and uncertain schemas are clearly marked for manual review.

Why this is worth $2: Writing OpenAPI specs by hand is tedious and error-prone. Existing generators require framework-specific decorators you have to add yourself. This skill works with code as-is — no annotations needed. Your agent reads the code, understands the routes, and produces docs that actually match your API.