Skill Claude CodeCodex
Mandates writing a comprehensive PRD/spec before ANY code is written. Spec must cover objectives, commands, structure, code style, testing strategy, boundaries, success criteria, and be reviewed via spec review gates before implementation begins.
Skill Claude CodeCodex
Enforces the Red-Green-Refactor cycle with strict test pyramid discipline (80% unit, 15% integration, 5% e2e). Mandates DAMP over DRY in test code, the Beyoncé Rule (if you liked it then you should've put a test on it), intentional mocking patterns, and the Prove-It pattern for bug fixes.
Skill Claude CodeCodex
Meta-skill that governs how all other skills are discovered and invoked. Use when starting a session or when you need to discover which skill applies to the current task.