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test-driven-development

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

auc/skill_library/bundled/test-driven-development/SKILL.md

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# 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
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