msw-skill

MSW (Mock Service Worker) v2 and v3 best practices, patterns, and API guidance for API mocking in JavaScript/TypeScript tests and development. Covers handler design, server setup, response construction, testing patterns, GraphQL, and v1-to-v2 and v2-to-v3 migration. Baseline: msw ^3.0.0. Triggers on: msw imports, http.get, http.post, HttpResponse, setupServer, setupWorker, graphql.query, sse, ws.link, mentions of "msw", "mock service worker", "api mocking", or "msw v3".