test-driven-development

Enforce the Red-Green-Refactor cycle with failing tests before production code.

7|Updated Mar 15, 2026
One-click install
npx skills add https://github.com/Cobalt-Money/Cobalt --skill test-driven-development-cobalt-money
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/Cobalt-Money/Cobalt/tree/main/.agents/skills/test-driven-development
Command: npx skills add https://github.com/Cobalt-Money/Cobalt --skill test-driven-development-cobalt-money

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This skill prevents the accumulation of technical debt and ensures high code quality by enforcing the Red-Green-Refactor cycle, eliminating the common pitfalls of writing tests after implementation or skipping them entirely.

Core Features & Use Cases

  • Strict TDD Enforcement: Mandates failing tests before any production code is written to ensure tests are meaningful.
  • Anti-Pattern Prevention: Provides guidance on avoiding common testing mistakes like mocking behavior instead of real logic or polluting production code with test-only methods.
  • Use Case: When implementing a new feature or fixing a bug, use this skill to guide the process of writing a failing test first, ensuring the implementation is minimal and the behavior is verified.

Quick Start

Use the test-driven-development skill to guide me through the Red-Green-Refactor cycle for the new user authentication feature.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
How do I enforce strict test-driven development cycles for reliable code?

To enforce strict test-driven development, mandate the Red-Green-Refactor cycle by writing a failing test before any production code. This ensures tests are meaningful and prevents skipping tests entirely.

What are common testing anti-patterns to avoid during refactoring?

Common testing anti-patterns to avoid during refactoring include mocking behavior instead of testing real logic and polluting production code with test-only methods. Preventing these mistakes maintains code integrity.

How do I fix a bug using the Red-Green-Refactor cycle?

Fix a bug using the Red-Green-Refactor cycle by first writing a failing test that reproduces the bug. Then, implement minimal production code to pass the test, ensuring the behavior is verified.

Does test-driven development prevent technical debt when implementing new features?

Yes, test-driven development prevents the accumulation of technical debt by eliminating the pitfall of writing tests after implementation. It ensures high code quality through strict cycle enforcement.

Can I use this workflow for both feature implementation and bug fixes?

Yes, you can use this workflow for both feature implementation and bug fixes. It applies across software development lifecycles to ensure all production code is verified by a preceding failing test.

Why write a failing test before writing production code?

Writing a failing test before production code ensures the test is actually verifying the target behavior. This strict test-driven development enforcement guarantees minimal implementation and high quality assurance.