# Tdd

> Test-driven development workflow

- Skill: `hongmaple0820/tdd-2` (Agent Skill)
- Install (CLI): `npx skillmds@latest add hongmaple0820/tdd-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hongmaple0820/tdd-2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Productivity
- Author: hongmaple0820 (https://skillmd.com/u/hongmaple0820)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/hongmaple0820/tdd-2

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# TDD Workflow

Test-driven development ensures code quality through deliberate practice.

## RED Phase

1. Write test for expected behavior
2. Run test - must FAIL
3. Commit test (optional)

## GREEN Phase

1. Write minimal implementation
2. Run test - must PASS
3. No refactoring yet

## REFACTOR Phase

1. Improve code structure
2. Tests must stay GREEN
3. Commit changes

## Checklist

- [ ] Test covers edge cases
- [ ] Coverage >= 80%
- [ ] No skipped tests
- [ ] Error paths tested