Test-Driven Development

Overview

One skill for all TDD workflows. Enforces test-first development using existing repository patterns. Three input modes handle different entry points — specs, task files, or ad-hoc descriptions — but the core cycle is always RED → GREEN → REFACTOR.

Input Modes

Detect the input type and follow the corresponding mode:

Mode A: From Spec (.spec.md)

Use when the input references a .spec.md file with Given/When/Then acceptance criteria.

1. Locate and parse the spec file — extract all Given/When/Then triples
2. Generate one test stub per criterion with todo!() bodies:

   /// Spec: <spec-file> — Criterion #<N>
   /// Given <given text>