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test-driven-development

Enforce a Red-Green-Refactor cycle for test-first software development.

Updated Feb 14, 2026
Search Tags:#workflow#testing#tdd#red-green-refactor#quality-assurance#software-development#tests-first
One-click install
npx skills add https://github.com/jbro/pi-agent --skill test-driven-development-jbro
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/jbro/pi-agent/tree/main/skills/superpowers/test-driven-development
Command: npx skills add https://github.com/jbro/pi-agent --skill test-driven-development-jbro

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

TDD enforces a test-first mindset to catch defects early and drive design decisions, reducing debugging time and enabling safer refactors.

Core Features & Use Cases

  • Red-Green-Refactor cycle to guide feature development, bug fixes, and large refactors.
  • Encourages writing tests before implementation to ensure code behavior matches requirements.
  • Provides guardrails that prevent production code from existing without tests.

Quick Start

Write a failing test for the required behavior, then implement the minimal code needed to pass the test.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
How does test-driven development improve software quality?▼

Test-first development requires writing a failing test for the required behavior, then implementing the minimal code needed to pass it, followed by refactoring to maintain code quality while tests stay green.

What is the Red-Green-Refactor cycle in TDD?▼

The Red-Green-Refactor cycle is a test-driven development workflow where you first write a failing test, implement the minimal code to make it pass, and then refactor the code while keeping tests green.

Do I need a test harness to start writing tests before implementation?▼

Yes, test-driven development requires a test harness and tooling support to run tests, ensuring you can execute the Red-Green-Refactor cycle and verify incremental progress for behavior changes.

Can I use test-first development for large refactoring tasks?▼

Yes, test-first development provides guardrails that prevent production code from existing without tests, making it suitable for large refactors by ensuring code behavior matches requirements through incremental, verifiable progress.

Why should my team adopt tests-first workflows instead of writing tests later?▼

Adopting tests-first workflows catches defects early and drives design decisions, reducing debugging time and providing guardrails that ensure code behavior matches requirements before implementation progresses.

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