Test-Driven Development (TDD) Protocol

About

This skill implements a rigorous Test-Driven Development (TDD) framework for Claude, mandating that every feature or bug fix begins with a failing test. By following the 'Iron Law'—no production code without a prior test failure—it ensures high-quality, verifiable codebases and prevents the common pitfalls of testing after implementation. It guides Claude through the Red-Green-Refactor cycle, helping developers maintain a clean, regression-proof source of truth while strictly adhering to the best practices of software craftsmanship and behavioral verification.

Key Features

• Automated verification of test failure messages before coding
• Guidance on writing minimal, behavior-focused unit tests
• Strict Red-Green-Refactor cycle enforcement
• Iron Law compliance: prevents untested production code
• Comprehensive TDD verification checklist for work completion
• 1 GitHub stars

Use Cases

• Implementing new features with guaranteed logic coverage
• Refactoring legacy codebases while maintaining functional parity
• Fixing bugs by first reproducing them with a failing test case