概要
Elevates software quality by integrating Red-Green-Refactor workflows into the development process. This skill guides the creation of robust unit, integration, and contract tests across various frameworks like Jest, Vitest, and pytest. It emphasizes the use of explicit fixtures over global magic, prioritizes fast feedback loops, and enforces strict coverage gates to prevent regressions. By focusing on behavior over implementation details and providing clear patterns for mocking external dependencies, it ensures that test suites remain maintainable, descriptive, and reliable.