Does this skill support languages other than Python and TypeScript?

While the skill provides specific templates for pytest and Jest, the core TDD workflow principles and phase gates can be adapted to any programming language supported by Claude Code.

What is the 'Red Phase' validation?

It is a crucial check that ensures a test file exists and actually fails before Claude is allowed to write any implementation code. This prevents 'false positive' tests that pass for the wrong reasons.

How does 'Extended Thinking' work in this skill?

It allows you to specify processing modes like 'think', 'think hard', or 'ultrathink' based on complexity, ensuring Claude applies the appropriate level of reasoning for scenarios like distributed systems or complex state machines.

Can I use mocks with this skill?

Yes, but the skill enforces strict rules: external APIs and services can be mocked, but internal functions must be implemented rather than mocked to ensure the actual logic is being tested.

TDD Workflow

Name: TDD Workflow
Author: garimto81

bygarimto81

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Security & Testing

Implements a strict Red-Green-Refactor testing cycle based on Anthropic's best practices for robust software development.

This skill automates and enforces the Test-Driven Development (TDD) lifecycle within Claude Code. By integrating automated Red Phase validation and 'Extended Thinking' for complex scenarios, it ensures that tests are written and fail before any implementation code is added. It includes pre-built templates for Python and TypeScript, prevents over-mocking of internal functions, and provides automated scripts to handle repetitive testing cycles, leading to higher code quality, better architecture, and fewer regressions.

Key Features

011 GitHub stars

02Automated Red-Green-Refactor phase enforcement and gating

03Pre-configured templates for pytest (Python) and Jest (TypeScript)

04Strict Red Phase validation to ensure tests fail before implementation

05Automated TDD cycle scripts for up to 5 iterations of self-correction

06Multi-level 'Extended Thinking' modes for complex business logic and state machines

Use Cases

01Standardizing team-wide testing patterns using Anthropic's recommended TDD practices

02Refactoring legacy codebases by establishing a safe test harness before modification

03Developing complex business logic where 100% test coverage is a requirement

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add garimto81/claude tdd-workflow

For use in Claude.ai and ChatGPT

Download Skill