Individual skill

tdd-pro

Test-driven development done right: red-green-refactor rhythm, test design, and knowing when TDD fits. Use when adopting TDD, writing tests first, or coaching teams.

skills/tdd-pro/SKILL.md

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# TDD Pro

## Overview

TDD — **red (failing test), green (minimal code), refactor** — is a design discipline disguised as
a testing practice. Writing the test first forces you to design the API before the implementation,
keeps scope minimal (only code the test demands), and leaves a regression suite as a byproduct.
Done well, it produces loosely-coupled, well-factored code; done ritualistically, it produces
brittle tests and resentment.

This skill covers the rhythm, the test-design judgment that makes it work, and the honesty about
where TDD shines and where it doesn't.

## When to use