Designs clean, consistent REST and GraphQL APIs covering resource modeling, URL structure, versioning, pagination, filtering, error formats (RFC 9457 Problem Details), idempotency, authentication, rate limiting, and machine-readable contracts (OpenAPI 3.1 / GraphQL SDL). Use this skill when designin
Designs clean, consistent REST and GraphQL APIs covering resource modeling, URL structure, versioning, pagination, filtering, error formats (RFC 9457 Problem Details), idempotency, authentication, rate limiting, and machine-readable contracts (OpenAPI 3.1 / GraphQL SDL). Use this skill when designing a new API or endpoint, reviewing an API design, choosing REST vs GraphQL, deciding on versioning o