test-driven-development

Enforce test-first development with red-green-refactor cycles before production code.

15|2|Updated Feb 12, 2026

Search Tags:#testing #tdd #red-green-refactor #code-quality #software-engineering #test-driven-development

Ready to run

npx skills add https://github.com/kousukef/forge --skill test-driven-development-kousukef

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/kousukef/forge/tree/main/skills/test-driven-development
Command: npx skills add https://github.com/kousukef/forge --skill test-driven-development-kousukef

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Manages development risk by requiring tests before implementing production code, ensuring behavior is validated early and regressions are detected.

Core Features & Use Cases

Enforces Red-Green-Refactor cycles to guide feature development, bug fixes, and refactors.
Reduces debugging time by catching failures via failing tests before coding.
Improves design decisions by documenting intended behavior through tests and guardrails.

Quick Start

To start, write a failing test that captures the desired behavior, then implement the minimal production code to pass it.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema

How do I start test-driven development for a new software feature?▼

To start test-driven development, write a failing test that captures the desired behavior, then implement the minimal production code needed to pass it. This enforces a strict Red-Green-Refactor cycle to guide feature development.

What problem does writing tests first solve in software engineering?▼

Writing tests first manages development risk by validating behavior early and detecting regressions before implementing production code. It reduces debugging time and improves design decisions by documenting intended behavior through failing tests.

Can I use test-driven development for bug fixes and refactoring?▼

Yes, test-driven development enforces Red-Green-Refactor cycles to guide bug fixes and refactors. It guards against non-test-based changes by requiring failing tests first, ensuring behavior is validated across the entire software cycle.

What is the best way to reduce debugging time when writing production code?▼

The best way to reduce debugging time is enforcing a test-first workflow that catches failures via failing tests before coding. This approach validates intended behavior early and guides design decisions through strict Red-Green-Refactor cycles.

Why does test-driven development require failing tests before implementing code?▼

Test-driven development requires failing tests first to guard against non-test-based changes and ensure behavior is validated early. This strict workflow reduces development risk by documenting intended behavior and detecting regressions before production code is written.