关于
This skill implements the rigorous 'Iron Law' of Test-Driven Development within Claude Code, requiring a failing test to exist before any production code is written. It guides developers through the complete Red-Green-Refactor lifecycle: starting with a failing test to verify behavior, writing the minimal code necessary to pass, and refactoring for quality—all while maintaining a green state. By preventing the 'test-after' anti-pattern, this skill ensures high test coverage, better API design, and a systematic approach to bug fixes and new feature development.