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test-driven-development

Guide developers through a Red-Green-Refactor cycle with failing tests first.

1|Updated Feb 20, 2026
Search Tags:#tdd#red-green-refactor#unit-testing#quality-assurance#software-engineering#test-driven-development
One-click install
npx skills add https://github.com/BlackRoad-OS-Inc/blackroad-operator --skill test-driven-development-blackroad-os-inc
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: test-driven-development
Source: https://github.com/BlackRoad-OS-Inc/blackroad-operator/tree/main/agents/superpowers/skills/test-driven-development
Command: npx skills add https://github.com/BlackRoad-OS-Inc/blackroad-operator --skill test-driven-development-blackroad-os-inc

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Modern software teams often ship features with unknowns and regressions because tests are an afterthought. This Skill helps by forcing a test-first approach where a failing test guides the minimal implementation.

Core Features & Use Cases

  • Red-Green-Refactor cycle: write a failing test, implement minimal code to pass, and refactor safely.
  • Test-first discipline: prioritize tests to document expected behavior and prevent regressions.
  • Safe refactoring: ensure changes don't break existing functionality by validating with tests.
  • Use Case: when adding a new feature or fixing a bug, start with tests to define the correct behavior.

Quick Start

Write a failing test for a feature you plan to implement, then write the minimal code to pass it.

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 prioritizes tests to document expected behavior and prevent regressions. You should use it when adding new features, fixing bugs, or refactoring to ensure correct behavior before writing production code.

How do I implement a new feature using a test-first approach?▼

To implement a feature using a test-first approach, write a failing test that defines the expected behavior, then write the minimal production code required to pass that test, and finally refactor safely while validating changes.

Does test-driven development help with safe refactoring?▼

Yes, test-driven development enables safe refactoring by validating changes with tests. Existing tests ensure that modifications and refactors do not break existing functionality or introduce unknown regressions.

What's the best way to fix a bug using unit testing?▼

The best way to fix a bug using unit testing is to start with a failing test that defines the correct behavior. This test-first approach guides the minimal implementation needed to fix the bug without introducing regressions.

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

You should avoid test-driven development when minimal production code is not feasible or when immediate delivery outweighs preventing unknown regressions. It forces a test-first approach that may slow down rapid prototyping.

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