Can I use this skill for refactoring?

Yes. The skill guides you through refactoring only after you have a 'Green' test suite, ensuring that cleanup and optimization do not change the intended behavior.

Does this skill work with existing codebases?

Absolutely. It uses context-gathering tools to understand existing patterns and helps you add new features or fixes using TDD even in previously untested code.

What is the 'Iron Law' of this TDD skill?

The Iron Law states that no production code can be written without a failing test first. If code is written before the test, it must be deleted and restarted from scratch.

How does this skill handle bug fixes?

It requires creating a minimal test that reproduces the bug (Red), verifying the failure, and then writing the minimal code necessary to fix it (Green) to prevent regressions.

Why does the skill insist on watching a test fail?

Watching a test fail (Red) proves that the test is actually checking the intended behavior and isn't passing by accident or testing the wrong logic.

Test-Driven Development (TDD)

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

byanortham

0•

Security & Testing

Enforces a rigorous Red-Green-Refactor workflow to ensure all production code is verified by failing tests first.

This skill transforms Claude into a disciplined TDD practitioner, mandating that no production code is written without a preceding failing test. It guides the AI through the complete Red-Green-Refactor cycle, emphasizing the 'Iron Law' of deleting unverified code and ensuring every feature or bug fix is backed by automated tests. By integrating with codebase exploration tools to understand interfaces before testing, it helps maintain high code coverage and architectural integrity while preventing common pitfalls like over-engineering or testing mocks instead of actual behavior.

Key Features

01Specific protocols for bug reproduction and regression testing

02Deep-dive exploration to understand API interfaces before writing tests

030 GitHub stars

04Automated checks to ensure tests fail for the right reasons before implementation

05Guided Red-Green-Refactor cycle with mandatory verification checkpoints

06Strict enforcement of the 'No Production Code Without a Failing Test' rule

Use Cases

01Refactoring legacy codebases by establishing a safety net of automated tests

02Implementing new features with a test-first architectural approach

03Fixing software bugs by reproducing them with a failing test first

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add anortham/razorback test-driven-development

For use in Claude.ai and ChatGPT

Key Features

01Specific protocols for bug reproduction and regression testing

02Deep-dive exploration to understand API interfaces before writing tests

030 GitHub stars

04Automated checks to ensure tests fail for the right reasons before implementation

05Guided Red-Green-Refactor cycle with mandatory verification checkpoints

06Strict enforcement of the 'No Production Code Without a Failing Test' rule

Use Cases

01Refactoring legacy codebases by establishing a safety net of automated tests

02Implementing new features with a test-first architectural approach

03Fixing software bugs by reproducing them with a failing test first

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add anortham/razorback test-driven-development

For use in Claude.ai and ChatGPT