superpowers-test-driven-development

Write failing tests before production code and implement minimal fixes.

90|5|Updated Jun 13, 2026

Search Tags:#workflow #tdd #red-green-refactor #code-quality #software-engineering #test-first

Ready to run

npx skills add https://github.com/christopherarter/superpowers-reasonix --skill superpowers-test-driven-development-christopherarter

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Skill: superpowers-test-driven-development
Source: https://github.com/christopherarter/superpowers-reasonix/tree/main/skills/superpowers-test-driven-development
Command: npx skills add https://github.com/christopherarter/superpowers-reasonix --skill superpowers-test-driven-development-christopherarter

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Identifies and fixes defects by enforcing the practice of writing a failing test before production code, ensuring feature development is guided by verified behavior.

Core Features & Use Cases

Enforces RED-GREEN-REFACTOR cycles to drive clean, reliable code.
Guides test-first design for features, bugs, and refactors.
Improves team discipline and code quality through fast feedback loops.

Quick Start

Run the failing test first, then implement the minimal code to make it pass.

Frequently Asked Questions about superpowers-test-driven-development

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

FAQPage Schema

How do I start writing a failing test before production code?▼

To start test-first development, you write a minimal, verifiable test that fails, implement just enough code to make it pass, and then clean up the code. This enforces a RED-GREEN-REFACTOR cycle.

What is the red-green-refactor cycle in software engineering?▼

The red-green-refactor cycle is a test-driven development practice where you write a failing test, write minimal code to satisfy that test, and then refactor to maintain readability and reliability.

Can I use test-first development for both bug fixes and feature development?▼

Yes, test-first development applies to feature development, bug fixes, and refactors across any language or project where tests drive design, ensuring behavior is verified before implementation.

Does test-driven development work with Python and JavaScript projects?▼

Test-driven development works with TypeScript, Python, and JavaScript projects. It guides code with tests first for reliable results, requiring a minimal verifiable test to drive the implementation.

Why does writing a failing test first improve code quality?▼

Writing a failing test first improves code quality by enforcing fast feedback loops and team discipline. It identifies and fixes defects early, ensuring feature development is guided by verified behavior.