TDD

TDD is a Quality skill for Claude Code, published by codeaholicguy in ai-devkit.

1.6K stars242 forkson codeaholicguy/ai-devkitAdded 2026/08/19Repository updated 2026/08/18

agent-frameworkagent-skillsaiai-agentsai-codingantigravityclaude-codeclicodex-clicoding-agentscursor-aideveloper-toolsgemini-climcpmemoryopencodepisoftware-engineeringworkflow-automation

Install in seconds

Install TDD

Copy TDD into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/codeaholicguy/ai-devkit/tree/main/skills/tdd ~/.claude/skills/tdd

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/codeaholicguy/ai-devkit.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/tdd/SKILL.md in codeaholicguy/ai-devkit
Installs to: ~/.claude/skills/tdd
Collection: One of 25 skills cataloged from this repository
Category: Quality — 1354 skills

What TDD does

TDD enforces a red-green-refactor cycle: write a failing test before any production code. Use it when implementing new functionality, adding behavior, or fixing bugs.

TDD is cataloged under Quality on DirSkills. TDD comes from a repository tagged agent-framework, agent-skills, ai, ai-agents and ai-coding.

Documentation

README

Excerpt

TDD

Red. Green. Refactor. In that order, every time.

Hard Rules

No production code without a failing test first.
If production code was written before its test, delete it and start over with a failing test.
Never skip the red step. A test that has never failed proves nothing.

Cycle

For each unit of behavior:

Red — Write a test for the next behavior. Run it. It must fail. Read the failure message — it should describe the missing behavior.
Green — Write the minimum production code to make the test pass. Nothing more. Run the test. Apply the verify skill.
Refactor — Clean up both test and production code. Run the test again. Still green? Done. Apply the verify skill.

Then pick the next behavior and repeat.

Rules for Each Step

This is the opening of the README. Read the full README on GitHub.

Frequently asked about TDD

What else does codeaholicguy publish alongside TDD?
TDD is one of 25 skills that DirSkills catalogs from codeaholicguy/ai-devkit, the repository it ships in. Its siblings there include Agent Communication, Agent Management and Agent Orchestration. Each one is a separate skill with its own page in this directory, installs the same way TDD does, and is maintained by codeaholicguy in that same repository. The rest of the collection is listed on the codeaholicguy/ai-devkit page.
How does TDD compare to other Quality skills?
TDD ranks #635 by stars among the 1354 Quality skills in this catalog. The most-starred ones next to it are Benchmark, Benchmark Optimization Loop and API Design Patterns. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of TDD against them. Open each page to compare what they document and how they install.