test-driven-development/

test-driven-development

Use when implementing any feature or bugfix, before writing implementation code

test driven development

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---
name: test-driven-development
description: Use when implementing any feature or bugfix, before writing implementation code
---

# Test-Driven Development (TDD)

## Overview

Write the test first. Watch it fail. Write minimal code to pass.

**Core principle:** If you didn't watch the test fail, you don't know if it tests the right thing.

**Violating the letter of the rules is violating the spirit of the rules.**

## When to Use

**Always:**
- New features
- Bug fixes
- Refactoring
- Behavior

How to Use

Recommended: Install to project (local)

mkdir -p .claude/skills
curl -o .claude/skills/test-driven-development.md \
  https://raw.githubusercontent.com/obra/superpowers/main/skills/test-driven-development/SKILL.md

Skill is scoped to this project only. Add .claude/skills/ to your .gitignoreif you don't want to commit it.

Alternative: Clone full repo

git clone https://github.com/obra/superpowers

Then reference at skills/test-driven-development/SKILL.md

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