tdd

Enforce test-driven development through a RED-GREEN-REFACTOR workflow.

11|1|Updated Feb 7, 2026

Search Tags:#tdd #red-green-refactor #quality-assurance #software-engineering #test-driven-development #coding-workflow

Ready to run

npx skills add https://github.com/KSD-CO/IronCode --skill tdd-ksd-co

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: tdd
Source: https://github.com/KSD-CO/IronCode/tree/main/packages/ironcode/skills/tdd
Command: npx skills add https://github.com/KSD-CO/IronCode --skill tdd-ksd-co

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Ensures production changes are driven by tests, reducing defects and enabling safer refactoring through a disciplined RED-GREEN-REFACTOR workflow.

Core Features & Use Cases

Enforces the RED-GREEN-REFACTOR cycle for feature work, bug fixes, and refactors.
Guides writing a failing test before any production code and deleting non-test-driven implementations.
Improves maintainability and regression safety across projects.

Quick Start

Begin by writing a failing test for a small behavior, run the tests to fail, implement the minimal production code to pass, and repeat.

Frequently Asked Questions about tdd

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How does test-driven development improve code quality and regression safety?▼

Test-driven development improves code quality by enforcing a RED-GREEN-REFACTOR workflow that requires a failing test before any production code. This reduces defects and enables safer refactoring across projects.

How do I apply the RED-GREEN-REFACTOR cycle to a bug fix?▼

To apply the RED-GREEN-REFACTOR cycle to a bug fix, first write a focused failing test that captures the buggy behavior. Then, implement the minimal production code to make it pass, and finally refactor the code while keeping tests green.

What is the minimal production code requirement in test-driven development?▼

The minimal production code requirement mandates writing only the code necessary to pass the failing test. It enforces test-driven development by requiring non-test-driven implementations to be deleted, ensuring deterministic progress and auditable commits.

Can I use test-driven development for refactoring existing code?▼

Yes, you can use test-driven development for refactoring existing code. The workflow applies to refactors by guiding teams through writing focused failing tests first, ensuring deterministic and auditable progress while maintaining regression safety.

Why should I delete non-test-driven implementations during a coding workflow?▼

You should delete non-test-driven implementations because test-driven development enforces writing a failing test before coding. Removing non-test-driven code ensures deterministic progress, commit discipline, and that every production change has a corresponding failing test first.