Test-Driven Development (TDD)

About

The Test-Driven Development skill transforms Claude's coding behavior by mandating the 'Iron Law': no production code is written without a failing test first. It guides the AI through the rigorous Red-Green-Refactor cycle, ensuring that every feature or bug fix is verified against actual requirements before implementation. By preventing common rationalizations for skipping tests, this skill helps eliminate technical debt, reduces regressions, and ensures that your test suite is a meaningful representation of intended behavior rather than an after-the-fact verification.

Key Features

• 1 GitHub stars
• Mandates failing tests before implementation to prove test validity
• Provides standardized verification checklists for TDD compliance
• Guides minimal code implementation to achieve passing states efficiently
• Enforces the Red-Green-Refactor cycle for all feature development
• Prevents technical debt by requiring code deletion if TDD steps are skipped

Use Cases

• Developing new features with high confidence and documented behavior
• Fixing software bugs by first reproducing them with a failing test case
• Safely refactoring complex logic by maintaining a green test state