anivar

Provides Zod v4 best practices, patterns, and API guidance for schema validation, parsing, error handling, and type inference in TypeScript applications. It covers safeParse, object composition, refinements, transforms, codecs, branded types, and v3→v4 migration.

Performs deep-dive code analysis with periodic saving. It offers Contributor mode for annual reviews and promotion readiness, and Codebase mode for mapping repository structure and governance, working with GitHub (gh) and GitLab (glab) and incrementally saving checkpoints to resume work across sessions.

Jest best practices, patterns, and API guidance for JavaScript/TypeScript testing. It covers mock design, async testing, matchers, timer mocks, snapshots, module mocking, configuration, and CI optimization, targeting Jest versions ^29.0.0 / ^30.0.0.

Enterprise technical documentation best practices, patterns, and frameworks for developer and partner adoption. It covers content architecture (Diataxis four quadrants), 14 content types, and pluggable writing styles.

Provides Redux-Saga best practices, patterns, and API guidance for building, testing, and debugging generator-based side-effect middleware. Covers effect creators, fork model, channels, testing, concurrency, cancellation, and Redux Toolkit integration.

This skill helps write tests for Redux Sagas using redux-saga-test-plan, runSaga, and manual generator testing. It covers integration (expectSaga) and unit (testSaga) testing, including providers, partial matchers, reducer integration, error simulation, and cancellation, compatible with Jest and Vitest.

Testing patterns for Zod schemas using Jest and Vitest, covering schema correctness, mock data generation, error assertions, integration, snapshot, and property-based testing. Requires zod ^4.0.0.

Offers best practices, patterns, and API guidance for MSW (Mock Service Worker) v2 for API mocking in JavaScript/TypeScript tests and development. It covers handler design, server setup, response construction, testing patterns, GraphQL, and v1-to-v2 migration.