tdd

Test-Driven Development workflow skill that enforces the Red-Green-Refactor cycle. Use when (1) implementing new features - automatically suggest TDD approach, (2) user explicitly calls /tdd command, (3) fixing bugs - write failing test first, (4) refactoring code - ensure tests exist before changes. Supports pytest with coverage tracking, optional BDD patterns (Given-When-Then), and integrates with the project's test structure.