openapi-spec-generator

A skill that analyzes a project and automatically generates an OpenAPI 3.x specification. It reads project overviews from CLAUDE.md or AGENT.md, auto-detects programming languages and frameworks, and extracts API endpoints. Use cases: (1) when you want to create API specifications for an existing project, (2) when you want to auto-generate API documentation, (3) when an OpenAPI/Swagger specification is required.