API Documentation Generate and maintain API documentation from code and OpenAPI specs. OpenAPI Spec Validation Interactive Docs Swagger UI Redoc Generate OpenAPI from Code Express/Node.js with swagger-jsdoc FastAPI (Python — auto-generates) TypeDoc (TypeScript Documentation) JSDoc Extraction SDK Generation from OpenAPI Linting OpenAPI Specs Notes - Write the OpenAPI spec first (design-first), then implement. It's faster than code-first for teams. - Keep specs in version control alongside the code. - Validate specs in CI — broken docs are worse than no docs. - SDK generation saves client teams…