Can I use this for refactoring existing code?

Absolutely. The skill follows the 'Refactor' phase of the TDD cycle, allowing for code cleanup only after a passing (Green) state has been established.

Does this skill work for bug fixes?

Yes, it requires writing a failing test that reproduces the specific bug before any fix is implemented, ensuring the fix is verified and preventing future regressions.

Why is the 'Verify Red' step mandatory?

Watching a test fail confirms that the test is actually checking the right behavior and that it fails for the expected reason, rather than passing by accident or due to a typo.

What is the Iron Law in this TDD skill?

The Iron Law states that no production code should be written without a failing test existing first. If code is written before a test, it must be deleted and started over.

What are the exceptions to using TDD with this skill?

Exceptions are rare but may include throwaway prototypes, generated code, or configuration files, usually requiring explicit confirmation from the human partner.

Test-Driven Development (TDD) Mastery

Name: Test-Driven Development (TDD) Mastery
Author: claudiodearaujo

byclaudiodearaujo

0•

Security & Testing

Enforces a strict Red-Green-Refactor workflow to ensure high-quality, bug-free production code through the Iron Law of testing.

This skill transforms Claude into a disciplined TDD practitioner, mandating that no production code is written without first establishing a failing test. It guides the development process through the rigorous cycle of writing minimal failing tests, implementing the simplest possible solutions to pass, and refactoring for architectural excellence. By preventing shortcuts and ensuring every behavior is verified before implementation, it helps developers eliminate technical debt, document behavior through code, and build highly maintainable software systems.

Key Features

01Minimalist code generation focused on passing specific test cases

02Detection and avoidance of common testing anti-patterns

03Comprehensive test-first bug reproduction and regression prevention

040 GitHub stars

05Strict Red-Green-Refactor cycle enforcement

06Mandatory verification of test failure before implementation

Use Cases

01Fixing complex bugs by establishing failing test cases first

02Implementing new features with verified, documented behavior

03Safely refactoring existing codebases with continuous verification

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add claudiodearaujo/sistema-de-narra-o-de-livro-front test-driven-development

For use in Claude.ai and ChatGPT

Download Skill

Key Features

01Minimalist code generation focused on passing specific test cases

02Detection and avoidance of common testing anti-patterns

03Comprehensive test-first bug reproduction and regression prevention

040 GitHub stars

05Strict Red-Green-Refactor cycle enforcement

06Mandatory verification of test failure before implementation

Use Cases

01Fixing complex bugs by establishing failing test cases first

02Implementing new features with verified, documented behavior

03Safely refactoring existing codebases with continuous verification

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add claudiodearaujo/sistema-de-narra-o-de-livro-front test-driven-development

For use in Claude.ai and ChatGPT

Download Skill