Tdd Workflow

This is a structured reference for Claude to follow test-driven development's RED-GREEN-REFACTOR cycle. It walks through the three phases with concrete rules: write a failing test, implement just enough code to pass it, then refactor while keeping tests green. The AAA pattern (Arrange-Act-Assert) and three laws of TDD are laid out clearly, which is helpful if you want Claude to write tests before code or help enforce discipline around minimal implementations. The anti-patterns section is a nice touch. It's basically a cheat sheet to keep TDD workflows consistent, though you'll still need to guide Claude on what specific behavior to test first.

skills.sh installs: 913
GitHub stars: 43.1K
last updated: Jul 14, 2026

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Install

$ npx -y skills add sickn33/antigravity-awesome-skills --skill tdd-workflow --agent claude-code

Installs into .claude/skills of the current project.

Files

TDD Workflow

Write tests first, code second.

1. The TDD Cycle

🔴 RED → Write failing test
    ↓
🟢 GREEN → Write minimal code to pass
    ↓
🔵 REFACTOR → Improve code quality
    ↓
   Repeat...

2. The Three Laws of TDD

Write production code only to make a failing test pass
Write only enough test to demonstrate failure
Write only enough code to make the test pass

3. RED Phase Principles

What to Write

Focus	Example
Behavior	"should add two numbers"
Edge cases	"should handle empty input"
Error states	"should throw for invalid data"

RED Phase Rules

Test must fail first
Test name describes expected behavior
One assertion per test (ideally)

4. GREEN Phase Principles

Minimum Code

Principle	Meaning
YAGNI	You Aren't Gonna Need It
Simplest thing	Write the minimum to pass
No optimization	Just make it work

GREEN Phase Rules

Don't write unneeded code
Don't optimize yet
Pass the test, nothing more

5. REFACTOR Phase Principles

What to Improve

SKILL.md on GitHub

Details

Repository: github.com/sickn33/antigravity-awesome-skills
Categories: Testing & QA, Automation & Workflows
First seen: May 16, 2026