test-driven-development

What problem does it solve? Developers often write code first and add tests afterward, which produces tests that pass immediately and prove nothing about correctness. This Skill enforces strict test-driven development so every piece of production code is backed by a test that was watched failing first. ## Core Features & Use Cases - Red-Green-Refactor Enforcement: Guides the AI through writing a failing test, verifying the failure, writing minimal passing code, and refactoring safely. - Rationalization Detection: Lists common excuses for skipping TDD ("too simple to test", "I'll test after") and counters each with concrete reasoning. - Verification Checklist: Provides a completion checklist covering test failure verification, minimal implementation, regression checks, and edge case coverage. - Use Case: When fixing a bug, the Skill requires writing a failing test that reproduces the bug first, then implementing the fix, ensuring the regression is permanently covered. ## Quick Start Implement the new retry feature using strict test-driven development with pytest, writing the failing test before any production code.