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test-driven-development

Enforce Red-Green-Refactor and Prove-It cycles for test-driven development.

Updated Jun 11, 2026
Search Tags:#tdd#red-green-refactor#unit-testing#software-quality#test-driven-development#prove-it
One-click install
npx skills add https://github.com/HaydernCenterpoint/Codex-Skills --skill test-driven-development-hayderncenterpoint
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/HaydernCenterpoint/Codex-Skills/tree/main/.grok/skills/test-driven-development
Command: npx skills add https://github.com/HaydernCenterpoint/Codex-Skills --skill test-driven-development-hayderncenterpoint

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This guide helps teams standardize a test-driven development approach to reduce bugs and shorten iteration cycles by ensuring code changes are driven by tests first.

Core Features & Use Cases

  • Red-Green-Refactor cycle: write a failing test, implement the minimal code to pass, then refactor while keeping tests green.
  • Prove-It pattern: reproduce bug with a targeted test, implement fix, verify test passes and regression risk is minimized.
  • Trigger phrases: "TDD", "write tests first", "red green refactor", "prove it", "fix the bug with a test".
  • Use Case: when introducing a new feature or changing existing behavior, rely on tests to drive design and guardrails.

Quick Start

Write a failing test for the new behavior, then implement the simplest code that makes the test pass.

Frequently Asked Questions about test-driven-development

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

FAQPage Schema
What is the Red-Green-Refactor cycle in test-driven development?▼

Test-driven development guides feature changes and bug fixes by enforcing tests first, reducing bugs, and shortening iteration cycles through the Red-Green-Refactor cycle and the Prove-It pattern.

How do I fix a bug using the Prove-It pattern?▼

To fix a bug using the Prove-It pattern, reproduce the issue with a targeted failing test, implement the code fix, and verify the test passes to minimize regression risk.

Does test-driven development work with TypeScript and backend development?▼

Yes, test-driven development applies to both frontend and backend development scenarios with unit and integration tests, and provides TypeScript examples where applicable.

How do I write tests first when introducing a new feature?▼

To write tests first for a new feature, create a failing test for the desired behavior, then implement the simplest code that makes the test pass to drive your design.

What triggers should I use to start a test-first workflow?▼

Trigger phrases like TDD, write tests first, red green refactor, prove it, and fix the bug with a test initiate the test-first workflow for feature work and bug fixes.

Why should I write tests before implementing code?▼

Writing tests before implementing code standardizes test-driven development, reduces bugs, and shortens iteration cycles by ensuring code changes are driven by tests first.

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