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LeonardoTan19
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test-driven-development

Enforce red-green-refactor cycles with failing tests before code implementation.

2|1|Updated May 1, 2026
Search Tags:#workflow#testing#tdd#red-green-refactor#code-quality
One-click install
npx skills add https://github.com/LeonardoTan19/metaforge --skill test-driven-development-leonardotan19
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/LeonardoTan19/metaforge/tree/main/skills/test-driven-development
Command: npx skills add https://github.com/LeonardoTan19/metaforge --skill test-driven-development-leonardotan19

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Test-driven development helps ensure that software behavior is correct by requiring failing tests before implementing code, reducing defects and guiding design.

Core Features & Use Cases

  • Enforces a red-green-refactor cycle to promote incremental, verifiable progress.
  • Aligns engineering workflow with design intent by validating behavior through tests before production code.
  • Useful for feature work, bug fixes, refactors, and critical behavior changes to prevent regressions.

Quick Start

Start by writing a failing test for the next feature you plan to implement.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
What is test-driven development and how does the red-green-refactor cycle work?▼

Test-driven development is a workflow requiring failing tests before writing production code. The red-green-refactor cycle enforces incremental progress: write a failing test, implement code to pass it, then refactor while maintaining passing tests.

How do I use test-first development to prevent regressions during code refactoring?▼

Use test-first development during refactoring by running existing tests before and after changes. This verifies behavior remains correct, preventing regressions while you modify internal design or fix bugs across software projects.

Can I apply test-driven development for both feature implementation and bug fixes?▼

Yes, test-driven development applies to feature implementation, bug fixes, refactors, and design changes. It aligns engineering workflow with design intent by validating expected behavior through tests before any production code is written.

What's the best way to start writing code with a test-first workflow?▼

Start test-first development by writing a failing test for the next feature you plan to implement. Write only enough production code to make the test pass, then refactor the codebase while ensuring verifications are repeated.

Why does test-driven development require tests to exist before code?▼

Test-driven development requires tests before code to ensure software behavior is correct by design. This reduces defects early and guides architectural design by validating behavior constraints before implementation begins.

Does test-driven development work for critical behavior changes in existing software projects?▼

Test-driven development works for critical behavior changes in existing software projects by enforcing the red-green-refactor cycle. It requires tests to validate modifications, ensuring verifiable progress and preventing regressions during complex updates.

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