Can I use this TDD skill for UI and CSS changes?

No, it is recommended to skip TDD for UI styling, configuration changes, and documentation updates, focusing instead on logic, functions, and API behavior.

What tools does this skill use to run tests?

It leverages integrated Bash and Grep tools to execute test runners like 'mix test' for Elixir or 'yarn test' for JavaScript/TypeScript environments.

Why does this skill require tests to fail first?

Writing a failing test first ensures that the test is actually checking the requirement and prevents false positives where a test passes regardless of the implementation.

How does this skill handle bug fixing?

It follows a strict process of reproducing the bug with a failing test case before allowing any implementation of the fix, ensuring the root cause is addressed.

Does this skill work with any programming language?

While it provides specific patterns for Elixir and TypeScript, the TDD principles and workflow can be applied to any language supported by Claude Code's terminal tools.

Test-Driven Development (TDD)

Name: Test-Driven Development (TDD)
Author: TheBushidoCollective

byTheBushidoCollective

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Security & Testing

Enforces the Red-Green-Refactor cycle to ensure code quality through failing-test-first development and systematic refactoring.

The Test-Driven Development (TDD) skill transforms Claude's coding workflow into a disciplined, test-first process. By requiring the creation of a failing test before any implementation code is written, it ensures that every new function, feature, or bug fix is precisely validated against requirements. This skill guides the user through the 'Red-Green-Refactor' cycle: writing a failing test (Red), implementing the minimal code necessary to pass (Green), and then improving code quality (Refactor). It is ideal for developers seeking to reduce technical debt, prevent regressions, and ensure that software behavior remains consistent across backend Elixir and frontend TypeScript environments.

Key Features

01Tailored test patterns for Elixir and TypeScript/React stacks

02Verification of failing tests to prevent false positives

03Strict Red-Green-Refactor workflow enforcement

04Behavior-driven testing focus over implementation details

0574 GitHub stars

06Automated execution of full test suites via terminal tools

Use Cases

01Resolving complex bugs by reproducing them with a test first

02Developing new features with 100% functional test coverage

03Safely refactoring existing logic while maintaining behavior

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add thebushidocollective/han test-driven-development

For use in Claude.ai and ChatGPT

Download Skill