Which testing frameworks does this skill support?

It is compatible with major ecosystems, including Jest and Vitest for JavaScript/TypeScript, Pytest for Python, and the native testing package for Go.

Does TDD slow down the development process?

While it requires more up-front discipline, TDD significantly reduces time spent on debugging and manual QA, leading to faster, more stable releases in the long run.

What happens if I write production code before a test?

The skill mandates the immediate deletion of that code. This 'Iron Law' ensures that you start fresh with a failing test, preventing the common pitfalls of 'test-after' development.

Why is the 'Verify RED' phase mandatory?

Watching a test fail confirms that the test is valid and specifically targeting the missing functionality. If a test passes immediately, it proves nothing about the new code's behavior.

Can I use this skill for bug fixes?

Yes. The TDD workflow is highly effective for bug fixes: write a test that reproduces the bug (RED), fix it (GREEN), and then clean up the implementation (REFACTOR).

Test-Driven Development (TDD) Enforcer

Name: Test-Driven Development (TDD) Enforcer
Author: LerianStudio

byLerianStudio

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セキュリティとテスト

Enforces the Red-Green-Refactor methodology with strict quality gates and mandatory code deletion for violations.

概要

The Test-Driven Development (TDD) skill mandates a disciplined workflow within Claude Code, ensuring that every line of production code is preceded by a failing test. It strictly enforces the Red-Green-Refactor cycle—writing a failing test, implementing the minimal code to pass, and kemudian refactoring for quality. By utilizing automated compliance checks and a 'zero-exception' deletion policy for untested code, this skill helps developers eliminate technical debt, improve software reliability, and ensure that tests truly verify behavior rather than just documenting existing code.

主な機能

Automated verification of test failure (RED phase)
Cross-language support for Jest, Vitest, Pytest, and Go Testing
17 GitHub stars
Strict Red-Green-Refactor cycle enforcement
Mandatory deletion protocol for code written before tests
Seamless integration with systematic debugging workflows

ユースケース

Applying rigorous bug fixes to prevent future regressions
Refactoring legacy codebases while maintaining functional integrity
Implementing new features with 100% verified test coverage

概要

主な機能

Automated verification of test failure (RED phase)
Cross-language support for Jest, Vitest, Pytest, and Go Testing
17 GitHub stars
Strict Red-Green-Refactor cycle enforcement
Mandatory deletion protocol for code written before tests
Seamless integration with systematic debugging workflows

ユースケース

Applying rigorous bug fixes to prevent future regressions
Refactoring legacy codebases while maintaining functional integrity
Implementing new features with 100% verified test coverage