vitest_runner
Modern JavaScript/TypeScript testing with Vitest including mocking and coverage.
bun-test
Configure Bun's built-in test runner with Jest-compatible APIs. Use when setting up testing infrastructure, writing unit/integration/snapshot tests, migrating from Jest, or configuring test coverage. 3-10x faster than Jest.
testing-strategy
Load PROACTIVELY when task involves writing tests, improving coverage, or test infrastructure. Use when user says \"add tests\", \"write unit tests\", \"set up E2E testing\", \"improve coverage\", or \"add mocks\". Covers Vitest/Jest unit tests, React Testing Library component tests, Playwright E2E tests, MSW API mocking, test organization and naming, fixture management, coverage targets and thresholds, snapshot testing, and CI integration.
testing-patterns
TDD workflows, test generation, and coverage strategies with Claude Code. Use when writing tests, implementing TDD, analyzing coverage gaps, or generating quality unit/integration/e2e tests. Covers Jest, Vitest, pytest, and mocking patterns.
