This is a comprehensive API design workflow that walks you through resource modeling, OpenAPI 3.1 spec creation, and validation with actual tools like Redocly CLI and Prism mock servers. It enforces REST fundamentals (no verbs in URIs, proper HTTP semantics) and ships with a complete OpenAPI starter template including RFC 7807 error handling, cursor pagination, and security schemes. The reference system loads topic-specific guidance on demand for versioning, pagination patterns, and error standards. You get an eight-point output checklist that ensures you deliver a linted spec, auth flows, and a deprecation strategy. Best for greenfield API projects or standardizing existing endpoints that have drifted into inconsistency.
npx skills add https://github.com/jeffallan/claude-skills --skill api-designer