AI Agent Skills

MSW (Mock Service Worker) best practices for API mocking in tests (formerly test-msw). This skill should be used when setting up MSW, writing request handlers, or mockin…

Apply the MSW Kernel to a markdown document — a plan, spec, skill, prompt, or any other .md file. Derives the document's contract, judges every claim by the kernel's del…

Produces mock server definitions, sandbox environment specs, API stub configurations, and fixture data for any API. Use whenever the user asks about mocking an API, crea…

Designs frontend tests using the repository's configured React test and browser harnesses, including RTL, MSW, Vitest, and Playwright when present. Use when adding or re…

Refine an existing prompt artifact — inline prompt text, markdown prompt files (system prompts, agent instructions, slash commands), or a complete skill directory — agai…

Design, write, run, and review tests for React, Next.js, or Vite frontends. Use for Vitest/Jest, React Testing Library, MSW, Playwright, E2E, accessibility testing, visu…