test-driven-development

Guide teams through Red-Green-Refactor by writing failing tests before production code.

1|1|Updated Sep 22, 2025
One-click install
npx skills add https://github.com/SkogAI/skillsandknowledge --skill test-driven-development-skogai
Or copy as Structured Prompt for Agent
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Skill: test-driven-development
Source: https://github.com/SkogAI/skillsandknowledge/tree/main/actions/test-driven-development
Command: npx skills add https://github.com/SkogAI/skillsandknowledge --skill test-driven-development-skogai

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill enforces a test-first mindset, ensuring code is driven by failing tests and regression safety.

Core Features & Use Cases

  • Red-Green-Refactor workflow: write a failing test, implement minimal code to pass, then refactor.
  • Responsible change management: prevents unverified behavior and reduces bugs by making tests the truth source.
  • Ideal for stable code: especially for new features, bug fixes, refactoring, or behavior changes.
  • When not to use: throwaway prototypes, generated code, or configuration files.

Quick Start

  • Create a failing test that describes the desired behavior.
  • Implement the minimal code to pass that test.
  • Run the test suite, then refactor for clarity and maintainability.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
What is the test-driven development workflow for writing reliable code?

The test-driven development workflow follows the Red-Green-Refactor cycle: write a failing test that describes desired behavior, implement minimal production code to pass it, then refactor while keeping tests green.

How do I start writing unit tests before implementing features?

To start writing unit tests first, create a failing test that describes the desired behavior, implement the minimal code required to pass that test, then run the test suite and refactor for clarity.

When should I not use test-driven development for software engineering tasks?

You should not use test-driven development for throwaway prototypes, generated code, or configuration files where verifying behavior through automated tests provides no regression safety value.

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

Yes, test-driven development is ideal for stable code including new features, bug fixes, refactoring, and behavior changes, ensuring verification through automated tests and iterative design.

Why does writing tests first reduce bugs in software engineering?

Writing tests first reduces bugs by making tests the truth source, enforcing responsible change management and preventing unverified behavior from entering production code.

Does the test-driven development workflow require any specific testing frameworks?

The test-driven development workflow applies across software projects without requiring specific frameworks, focusing on the Red-Green-Refactor cycle and automated test verification.