Pattern

tdd

Enforce strict red-green-refactor TDD with vertical slicing only — one test, one slice of behavior, one piece of implementation at a time. No horizontal slicing.

Classification — Methodology skill — test-driven development

Full entry

The complete treatment — problem, how it works, when to use it, sources, and examples — lives in the volume below.

Vol. 02 The Claude Skills Catalog Workflow & Primitives

Browse the full pattern index or the catalog.