What test runners does the TDD skill support?

The skill automatically detects and configures itself for Vitest, Jest, Playwright, and Mocha based on your project files (e.g., package.json or config files).

Can I use this for UI layout changes?

It is not recommended for pure UI layout or CSS changes. It is designed for logic-heavy features, functions, and modules where functional correctness is critical.

Does it handle refactoring automatically?

Yes, once a test passes (Green phase), the skill proceeds to a Refactor phase where it improves code quality and naming while ensuring all tests still pass.

Does the skill actually run the tests?

Yes, the skill executes the relevant test commands in your environment and captures the output to verify failure in the Red phase and success in the Green phase.

What is the 'Iron Law' mentioned in the documentation?

The Iron Law mandates that no implementation code is written without a failing test first. This ensures 100% test coverage for all new logic and prevents developer bias.

Test-Driven Development (TDD)

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

byHerbertJulio

•

安全与测试

Enforces a strict Red-Green-Refactor methodology to ensure high-quality, bug-free code through automated test cycles.

This skill transforms Claude into a disciplined TDD practitioner, strictly adhering to the 'Iron Law' of writing no implementation code without a preceding failing test. It features an intelligent auto-detection system for common test runners like Vitest, Jest, Playwright, and Mocha, and guides the development process through structured cycles of test creation, minimal implementation, and code refactoring. It is particularly effective for building critical business logic, securing sensitive data handlers, and fixing bugs with guaranteed regression coverage.

主要功能

01Detailed verification protocol with captured test outputs

0210 GitHub stars

03Automatic detection of Vitest, Jest, Playwright, and Mocha runners

04Automated git commits for each successful TDD cycle

05Strict Red-Green-Refactor workflow enforcement

06Integrated code coverage monitoring and reporting

使用场景

01Refactoring legacy codebases with verified safety

02Building complex business logic or validation engines

03Fixing critical bugs requiring guaranteed regression tests

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add herbertjulio/specialist-agent tdd

For use in Claude.ai and ChatGPT