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 agent 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") with concrete rebuttals and red flags that trigger a restart. - Subagent Integration: Shows how to enforce TDD when dispatching implementation work via delegate_task and how to pair with systematic-debugging for bug fixes. - Use Case: When fixing a bug, write a failing test that reproduces it first, verify the failure, implement the minimal fix, and confirm the full suite passes without regressions. ## Quick Start Ask the agent to implement a new feature using strict TDD with pytest, writing and verifying a failing test before any production code.
