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tdd

Automate RED-GREEN-REFACTOR cycles with unit tests for software design.

Updated Jan 14, 2026
One-click install
npx skills add https://github.com/primeinc/swarm --skill tdd-primeinc
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: tdd
Source: https://github.com/primeinc/swarm/tree/main/.opencode/skill/tdd
Command: npx skills add https://github.com/primeinc/swarm --skill tdd-primeinc

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Test-driven development guides reliable software design by turning requirements into executable tests first, catching regressions early, and reducing debugging time.

Core Features & Use Cases

  • RED-GREEN-REFACTOR workflow: Write a failing test, implement minimal code to pass, then refactor with confidence.
  • Unit-first validation: Build small, focused tests that document intent and support safe refactoring.
  • Use Case: When adding a new feature, write tests that define expected behavior, then implement to satisfy them across modules.

Quick Start

Start by writing a failing test for a small behavior, then implement just enough code to pass, and finally refactor while keeping tests green.

Frequently Asked Questions about tdd

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

FAQPage Schema
How does test-driven development guide software design and catch regressions?▼

Test-driven development guides software design by turning requirements into executable unit tests first, catching regressions early, and reducing debugging time through a structured RED-GREEN-REFACTOR cycle.

What is the RED-GREEN-REFACTOR workflow for writing unit tests?▼

The RED-GREEN-REFACTOR workflow involves writing a failing test for a small behavior, implementing minimal code to pass that test, and finally refactoring the implementation while keeping tests green to ensure safe design improvements.

Do I need a test framework and runner to automate test-driven development?▼

Yes, automating test-driven development requires a project with an existing test framework and runner, such as bun/test equivalents, to execute unit tests and support incremental growth throughout the development cycle.

Can I use test-driven development for refactoring and bug fixes in functional codebases?▼

Yes, test-driven development applies to feature work, bug fixes, and refactoring across both object-oriented and functional codebases, using unit-first validation to build focused tests that document intent and support safe refactoring.

How do I start writing a failing test for a new feature behavior?▼

Start by writing a failing unit test that defines the expected behavior for a small feature module, then implement just enough code to pass the test, and finally refactor with confidence while maintaining green tests.

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