What is the Red-Green-Refactor cycle in this skill?

It is a three-step process where you first write a failing test (Red), implement the minimum code necessary to make the test pass (Green), and finally improve the code structure without changing behavior (Refactor).

How does the 'watch' command help in the TDD process?

The watch command starts a continuous test runner that provides immediate feedback as you modify code, ensuring you know the instant a change breaks a requirement.

Can this skill help me write better tests?

Yes, it enforces the AAA (Arrange, Act, Assert) pattern and encourages small, atomic tests that focus on one concept at a time, leading to a more maintainable test suite.

Which testing frameworks does this skill support?

While it includes a default Vitest template, the workflow and logic are framework-agnostic and can be used with Jest, Mocha, Pytest, or any other standard testing library.

Test-Driven Development (TDD)

Name: Test-Driven Development (TDD)
Author: jellydn

byjellydn

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Security & Testing

Guides developers through the complete Red-Green-Refactor cycle to ensure robust and maintainable code through test-first principles.

The TDD skill empowers AI agents to follow rigorous test-driven development workflows, managing the transition between writing failing tests, implementing minimal passing code, and refactoring for quality. It provides a structured set of commands to initialize features, track test status, and enforce best practices like the Arrange-Act-Assert (AAA) pattern. This skill is indispensable for developers who prioritize code reliability and clean architecture, providing continuous feedback through test watchers and ensuring that every line of code is backed by a validating test case.

Key Features

01Automated Red-Green-Refactor cycle management

0242 GitHub stars

03Structured 'Arrange, Act, Assert' (AAA) pattern enforcement

04Continuous feedback via integrated test watcher support

05Integrated test template generation for Vitest and other frameworks

06Real-time status tracking for incremental feature development

Use Cases

01Implementing new software features using a strict test-first methodology

02Refactoring complex legacy codebases while maintaining functional integrity

03Standardizing testing workflows across a development team using AI

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jellydn/my-ai-tools tdd

For use in Claude.ai and ChatGPT

Download Skill