typescript-testing

v2026.09.24

Select and run TypeScript SDK verification for packages, examples, type checks, linting, builds, Vitest suites, Effect v4 CLI tests, and runtime E2E tests. Use when adding tests, diagnosing TypeScript CI, choosing a focused test command, validating TypeScript package changes, or writing/porting CLI tests against effect@4.0.0-rc.115 and @effect/vitest. Do not use for Python-only checks.

GitHub

Install command

npx skhub add composiohq/typescript-testing

Markdown

SKILL.md

TypeScript Testing

Use this skill to choose verification for TypeScript changes.

Read references/test-commands.md before running broad checks or adding new test coverage.

Read references/effect-v4-cli.md before writing or modifying tests under ts/packages/cli/test/ — it covers it.effect/layer(...) conventions, explicit per-service test layers (no .Default auto-generation in v4), and the @effect/platform-bun subpath-import rule.

Install command

npx skhub add composiohq/typescript-testing

Discovery