What is the TDD Red Phase?

The Red Phase is the first step in Test-Driven Development where you write a test for a new feature that is expected to fail because the implementation doesn't exist yet.

Why must the test fail initially?

A failing test proves that the test is actually testing the new behavior and isn't passing by accident or due to existing logic.

How does the AAA pattern improve my tests?

The Arrange-Act-Assert pattern provides a clear structure that separates test setup, execution, and verification, making tests much easier to read and maintain.

What programming languages are supported?

This skill provides specific naming conventions and file patterns for Go, Python, TypeScript, and Rust, but the principles can be applied to any language.

TDD Red Phase Expert

Name: TDD Red Phase Expert
Author: pagerguild

bypagerguild

0•

Security & Testing

Enforces the 'test-first' principle of Test-Driven Development by guiding users to write failing tests before implementation.

The TDD Red Phase Expert is a specialized Claude Code skill designed to streamline the initial stage of Test-Driven Development. It helps developers identify core behaviors, establish descriptive naming conventions, and structure tests using the Arrange-Act-Assert (AAA) pattern. By ensuring tests fail for the right reasons before any business logic is written, this skill prevents trivial passing, improves code coverage, and promotes a more robust architectural design from the start of the development cycle.

Key Features

01Standardizes test naming using scenario-based conventions

02Automates phase transitions via integrated CLI commands

03Identifies and prevents common TDD mistakes like implementation-first coding

04Provides language-specific test file patterns for Go, Python, TS, and Rust

05Enforces the Arrange-Act-Assert (AAA) test structure

060 GitHub stars

Use Cases

01Starting new feature development with a test-first approach

02Teaching and enforcing TDD best practices within a development team

03Designing complex test suites before writing any implementation code

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add pagerguild/guilde-plugins tdd-red-phase

For use in Claude.ai and ChatGPT

Download Skill