Does this skill allow for exceptions like prototypes?

The skill allows exceptions for throwaway prototypes, generated code, or configuration files, but generally requires human partner permission to skip the TDD process for production logic.

Why does the skill insist on watching a test fail first?

If you don't watch a test fail (the RED phase), you cannot be certain the test is actually testing the new behavior or that it is capable of catching a regression. It proves the test is valid.

Can I use this TDD skill for fixing existing bugs?

Yes. The workflow for bugs is to write a test that reproduces the bug, verify that it fails, and then write the minimal code required to make it pass, preventing future regressions of that same bug.

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

The Iron Law dictates that no production code should be written without a failing test first. If code is written before a test, the skill mandates deleting it and starting over to ensure the test actually verifies the logic.

Test-Driven Development (TDD)

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

byguaderrama

0•

安全与测试

Enforces a strict Red-Green-Refactor workflow to ensure high-quality, verified production code through test-first implementation.

This skill transforms Claude into a disciplined TDD practitioner, mandating that no production code is written without a preceding failing test. It guides developers through the rigorous cycle of writing minimal failing tests, implementing the simplest code to pass, and refactoring while maintaining a 'green' state. By prohibiting common shortcuts and enforcing the 'delete-and-restart' rule for untested code, it ensures every line of logic is systematically verified, behaviorally documented, and free from regression risks.

主要功能

010 GitHub stars

02Enforcement of the 'No Production Code Without a Failing Test' iron law

03Guided Red-Green-Refactor cycles with mandatory verification checkpoints

04Automated verification checklists for features, bug fixes, and refactoring

05Best practice guidance for writing minimal, behavior-focused test cases

06Prevention of common TDD rationalizations and 'test-after' anti-patterns

使用场景

01Fixing production bugs by reproducing them with a failing test first

02Building complex new features with high confidence and zero regressions

03Safely refactoring legacy code by establishing a test-first safety net

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add guaderrama/cabo-health-ai test-driven-development

For use in Claude.ai and ChatGPT

Download Skill