What happens during the Refactor phase?

Refactoring occurs only after a test passes (GREEN). This phase focuses on cleaning up code, improving naming, and removing duplication while ensuring the tests remain passing.

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

The Iron Law states that no production code should be written unless a test has first failed. If code is written before a test, it must be deleted to ensure a fresh, test-driven implementation.

Why does the skill insist on seeing a test fail (RED phase)?

A test that hasn't been seen to fail may be passing for the wrong reasons or testing the wrong logic. Verifying the failure ensures the test is actually validating the new behavior.

Can I use this skill for bug fixes?

Yes, it is highly recommended. The workflow involves writing a failing test that reproduces the bug, then implementing the minimal fix to make it pass.

Test-Driven Development (TDD) Discipline

Name: Test-Driven Development (TDD) Discipline
Author: chronista-club

bychronista-club

0•

Security & Testing

Enforces a rigorous Red-Green-Refactor workflow to ensure high-quality, verified code for all features and bug fixes.

The TDD skill transforms Claude into a disciplined development partner by mandating a test-first approach. It follows the strict 'Iron Law': no production code is written until a failing test exists. This ensures that every feature is verifiable, every bug is reproducible via automation, and every refactor is safe. By catching logic errors early and preventing the accumulation of untested code, this skill helps developers maintain high software standards and avoid common rationalization traps that lead to technical debt.

Key Features

01Guided minimal code implementation (GREEN)

020 GitHub stars

03Anti-pattern and rationalization detection

04Safe refactoring protocols

05Strict Red-Green-Refactor cycle enforcement

06Mandatory verification of failing tests (RED)

Use Cases

01Reproducing and fixing bugs through automated testing

02Safe refactoring of complex legacy logic

03Implementing new features with 100% test coverage

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add chronista-club/claude-plugin-chronista-style tdd

For use in Claude.ai and ChatGPT

Download Skill