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test-driven-development

Enforce red-green-refactor cycles by writing failing tests before implementation.

Updated Mar 23, 2026
Search Tags:#tdd#refactoring#red-green-refactor#best-practices#quality-assurance#test-driven-development#software-testing
One-click install
npx skills add https://github.com/lucasreydman/lloyd --skill test-driven-development-lucasreydman
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/lucasreydman/lloyd/tree/main/skills/superpowers/skills/test-driven-development
Command: npx skills add https://github.com/lucasreydman/lloyd --skill test-driven-development-lucasreydman

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Writing tests before production code helps prevent regressions and ensures implemented features behave as expected, reducing debugging time and drift from intended behavior.

Core Features & Use Cases

  • Red-Green-Refactor cycle: write a failing test, implement minimal code, and refactor confidently.
  • Test-first discipline: guides design decisions and accelerates safe delivery.
  • Use Case: for every feature or bugfix, start with a failing test to drive implementation and verify behavior early.

Quick Start

Begin by writing a failing test that captures the desired behavior, then implement the minimal production code to make the test pass.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
How do I use the red-green-refactor cycle for test-driven development?▼

The red-green-refactor cycle in test-driven development involves writing a failing test, implementing minimal production code to pass it, and safely refactoring. This enforces test-first discipline to guide design and accelerate safe delivery.

What is the best way to prevent code regressions during feature development?▼

Writing tests before production code is the best way to prevent regressions during feature development. This test-first approach ensures implemented features behave as expected, reducing debugging time and drift from intended behavior.

Can I apply test-driven development to bug fixes and refactoring?▼

Yes, test-driven development applies to feature development, bug fixes, and refactoring across any codebase using automated tests. Starting with a failing test verifies behavior early and drives minimal implementation for the fix.

Does test-driven development work without an existing automated test suite?▼

Test-driven development requires a codebase that uses automated tests to validate changes. You must be able to write and execute a failing test that captures desired behavior before implementing minimal production code.

Why does writing tests first help guide software design decisions?▼

Writing tests first helps guide software design decisions by enforcing minimal implementation in response to failing tests. This test-first discipline ensures tests drive design, preventing over-engineering and verifying intended behavior early.

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