What problem does it solve? Writing unit tests that match a project's established conventions is slow and error-prone: you must discover the repo's test patterns, mock styles, and fixture practices before writing a single assertion. This Skill automates that discovery and produces tests covering happy paths, edge cases, and error states in the project's own style. ## Core Features & Use Cases - Repo-aware test generation: Loads structured test conventions via a test-context step, then writes tests using the project's existing naming, mock patterns, factories, and assertion style. - Coverage planning and verification: Builds an explicit test plan (happy path, edge cases, error states), runs the new test file with pnpm, and proves each test can fail by mutating the source and re-running. - Grounded fixtures: Requires enumerated or generated fixture values to be quoted from real production sources rather than invented. - Use Case: After adding a new React hook, invoke the Skill with the hook's path to get a test file that matches the repo's conventions, verified to run and to fail when its subject is broken. ## Quick Start Ask the AI to write unit tests for a specific file, for example: write unit tests for src/hooks/useCart.ts.
