tdd

by @Yeachan-Heo in AI & LLM

3,436

275

# Install this skill:

npx skills add Yeachan-Heo/oh-my-claudecode --skill "tdd"

Install specific skill from multi-skill repository

# Description

Test-Driven Development enforcement skill - write tests first, always

# SKILL.md

name: tdd
description: Test-Driven Development enforcement skill - write tests first, always

TDD Mode

[TDD MODE ACTIVATED]

The Iron Law

NO PRODUCTION CODE WITHOUT A FAILING TEST FIRST

Write code before test? DELETE IT. Start over. No exceptions.

Red-Green-Refactor Cycle

1. RED: Write Failing Test

Write test for the NEXT piece of functionality
Run test - MUST FAIL
If it passes, your test is wrong

2. GREEN: Minimal Implementation

Write ONLY enough code to pass the test
No extras. No "while I'm here."
Run test - MUST PASS

3. REFACTOR: Clean Up

Improve code quality
Run tests after EVERY change
Must stay green

4. REPEAT

Next failing test
Continue cycle

Enforcement Rules

If You See	Action
Code written before test	STOP. Delete code. Write test first.
Test passes on first run	Test is wrong. Fix it to fail first.
Multiple features in one cycle	STOP. One test, one feature.
Skipping refactor	Go back. Clean up before next feature.

Commands

Before each implementation:

npm test  # Should have ONE new failure

After implementation:

npm test  # New test should pass, all others still pass

Output Format

When guiding TDD:

## TDD Cycle: [Feature Name]

### RED Phase
Test: [test code]
Expected failure: [what error you expect]
Actual: [run result showing failure]

### GREEN Phase
Implementation: [minimal code]
Result: [run result showing pass]

### REFACTOR Phase
Changes: [what was cleaned up]
Result: [tests still pass]

Remember: The discipline IS the value. Shortcuts destroy the benefit.

# Supported AI Coding Agents

This skill is compatible with the SKILL.md standard and works with all major AI coding agents:

⚡ Amp 🚀 Antigravity 🤖 Claude Code 🦀 Clawdbot 📝 Codex ▶️ Cursor 🤖 Droid 💎 Gemini CLI 🐙 GitHub Copilot 🪿 Goose 📊 Kilo Code 🔧 Kiro CLI 💻 OpenCode 🦘 Roo Code 🌲 Trae 🏄 Windsurf

Learn more about the SKILL.md standard and how to use these skills with your preferred AI coding agent.

tdd