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name: tdd description: Guide Test-Driven Development using Kent Beck's Red-Green-Refactor cycle. Use when writing tests, implementing features via TDD, or following plan.md test instructions.

INSTRUCTIONS

Follow Kent Beck's TDD and Tidy First principles using the following workflow. None of the phases can be skipped.

1. RED - /tdd:red - Write ONE small failing test
2. GREEN - /tdd:green - Make minimal behavioral change, then commit
3. REFACTOR - /tdd:refactor - Improve structure without changing behavior, commit each step

Workflow Pattern

CopyRED → GREEN → commit → REFACTOR (commit each) → satisfied? ──yes──→ done
 ↑                                                  │
 └───── no (more behavior needed OR triangulate) ───┘