What problem does it solve? Developers often write production code first and add tests afterward, which produces tests that pass immediately and prove nothing about correctness. This Skill enforces a strict test-first discipline so every feature and bugfix is backed by a test that was watched failing before implementation. ## Core Features & Use Cases - Red-Green-Refactor Enforcement: Guides the AI through writing one failing test, verifying the failure, writing minimal passing code, and refactoring while staying green. - Rationalization Detection: Lists common excuses for skipping TDD ("too simple to test", "I'll test after") and counters each with concrete reasoning. - Bug Fix Workflow: Reproduces bugs as failing tests first, ensuring the fix is proven and regression-protected. - Use Case: When asked to add a retry mechanism to an API client, the AI first writes a failing test asserting three retry attempts, watches it fail, then implements the minimal loop to make it pass. ## Quick Start Implement the new validation feature using test-driven development, writing a failing test first and showing me it fails before writing any implementation code.
