Is the 80% coverage requirement mandatory?

Yes, the skill is configured to verify and enforce a minimum of 80% coverage across all test types to ensure code quality and reliability.

Does it support mocking external services?

Absolutely. It provides standardized patterns for mocking popular services like Supabase, Redis, and OpenAI to ensure fast, isolated test execution.

How does this skill enforce TDD?

It guides Claude to write comprehensive test cases and user journeys before generating any implementation code, ensuring every feature is guided by requirements.

What testing frameworks are supported?

The skill includes specialized patterns for Jest and Vitest for unit/integration testing, and Playwright for end-to-end browser automation.

Can I use this for bug fixing?

Yes. The workflow requires writing a failing test that reproduces the bug before implementation, which prevents the issue from reoccurring in the future.

TDD Workflow for Claude Code

Name: TDD Workflow for Claude Code
Author: Nixdorfer

byNixdorfer

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Security & Testing

Enforces rigorous Test-Driven Development (TDD) practices with mandatory 80% coverage across unit, integration, and E2E tests.

The TDD Workflow skill transforms Claude into a disciplined test-first developer, ensuring that every piece of code—from new UI components to complex API endpoints—is backed by robust automated tests. It mandates an 80% coverage threshold across unit, integration, and Playwright E2E layers, strictly following the Red-Green-Refactor cycle. This skill is essential for teams prioritizing code reliability, long-term maintainability, and regression prevention in their AI-assisted development process by providing standardized patterns for mocking and testing modern tech stacks.

Key Features

011 GitHub stars

02Strict 'Tests Before Code' enforcement (Red-Green-Refactor)

03Mandatory 80%+ coverage threshold for unit, integration, and E2E tests

04Standardized mocking for external services like Supabase, Redis, and OpenAI

05Pre-defined patterns for Jest, Vitest, and Playwright E2E testing

06Automated user journey and test case generation based on feature requirements

Use Cases

01Refactoring legacy codebases while ensuring zero regressions are introduced

02Implementing new features with a comprehensive safety net of automated tests

03Standardizing testing quality and coverage across a distributed development team

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add nixdorfer/claudecodetool tdd-workflow

For use in Claude.ai and ChatGPT

Download Skill