What happens if my test passes immediately?

If a test passes before you write implementation code, it proves nothing. You are either testing existing behavior or your test is flawed. The skill requires you to fix the test so it fails first.

Is this skill compatible with my existing testing framework?

Yes, while the documentation provides TypeScript examples, the core TDD principles applied by this skill are language and framework agnostic.

When should I skip TDD using this skill?

TDD should be used for almost everything. Exceptions include throwaway prototypes, generated code, or simple configuration files, but you should consult with your human partner before skipping.

Why does this skill insist on deleting code written before tests?

Writing code before tests is 'testing after,' which often misses edge cases. Deleting it forces you to implement only what is necessary to pass the test, ensuring the test is actually verifying the logic.

Test-Driven Development (TDD)

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

byflosrn

0•

安全与测试

Enforces a strict Red-Green-Refactor workflow to ensure all production code is verified by failing tests first.

This skill implements a rigorous Test-Driven Development (TDD) methodology for Claude Code, ensuring high software quality through the 'Iron Law' of testing: no production code without a failing test first. It guides the development process through the essential Red-Green-Refactor cycle, forcing the discovery of edge cases before implementation and preventing the accumulation of technical debt. By mandating that tests fail for the right reasons before passing, this skill helps developers build robust, self-documenting, and maintainable codebases with high confidence.

主要功能

01Strict Red-Green-Refactor cycle enforcement

020 GitHub stars

03Guidance for writing minimal, purposeful implementation code

04Mandatory failure verification to prevent false-positive tests

05Comprehensive verification checklists for bug fixes and features

06Behavior-driven testing patterns over implementation-leakage

使用场景

01Building new features using a test-first approach to ensure requirements are met

02Safely refactoring complex logic by maintaining a green test suite throughout

03Reproducing and fixing bugs by first creating a failing regression test

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add flosrn/.claude test-driven-development

For use in Claude.ai and ChatGPT

主要功能

01Strict Red-Green-Refactor cycle enforcement

020 GitHub stars

03Guidance for writing minimal, purposeful implementation code

04Mandatory failure verification to prevent false-positive tests

05Comprehensive verification checklists for bug fixes and features

06Behavior-driven testing patterns over implementation-leakage

使用场景

01Building new features using a test-first approach to ensure requirements are met

02Safely refactoring complex logic by maintaining a green test suite throughout

03Reproducing and fixing bugs by first creating a failing regression test

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add flosrn/.claude test-driven-development

For use in Claude.ai and ChatGPT