Test-driven development helps you write better code by writing tests first. This guide shows you how to generate unit tests, create mocks and stubs, and find coverage gaps. It works with popular testing frameworks like Jest, Pytest, JUnit, and Vitest.
You can follow the red-green-refactor workflow. First write a failing test, then make it pass, then improve your code. The guide gives you tools to generate tests from your source code and analyze which parts of your code are not tested.
Whether you are new to testing or want to improve your test coverage, this skill makes it easy. It helps you focus on critical gaps first and reach high coverage targets like 80 percent or more.
Global
mkdir -p ~/.claude/skills/tdd-guideProject
mkdir -p .claude/skills/tdd-guideSource Repository
Grill Memattpocock/skills
Stress-test your plan with relentless questions until we both understand
Tddmattpocock/skills
Write one test at a time then code to make it pass
Test Driven Developmentobra/superpowers
Write a failing test first then code just enough to pass
Qamattpocock/skills
Turn bug reports into GitHub issues through natural conversation without technical fuss
Migrate To Shoehornmattpocock/skills
Replace unsafe as assertions with type-safe partial test data easily
Webapp Testinganthropics/skills
Test your local web apps quickly with Playwright automation and screenshots
Playwright Best Practicescurrents-dev/playwright-best-practices-skill
Master Playwright testing with best practices for reliable and fast tests
Google Agents Cli Evalgoogle/agents-cli
Run evaluations on your AI agent, find failures, and improve its quality step by step