Test-Driven Development (TDD) Skill

Overview

This skill enforces strict test-first development methodology. The core principle: "Write the test first. Watch it fail. Write minimal code to pass." If you didn't watch the test fail, you don't know if it tests the right thing.

Quick Start

1. Write one failing test - Minimal test demonstrating desired behavior
2. Verify RED - Run test, confirm it fails (not errors)
3. Write minimal code - Just enough to pass
4. Verify GREEN - All tests pass
5. Refactor - Clean up while maintaining green

When to Use