tdd

Guide for implementing features using Test-Driven Development (TDD) methodology. Use when: (1) User requests to implement a feature using TDD, (2) User asks to write tests first before implementation, (3) User mentions Red-Green-Refactor cycle, (4) Starting a new feature that requires systematic testing. This skill provides step-by-step TDD workflows, concrete test patterns, and best practices for writing tests before implementation in TypeScript/React projects using Vitest.

// tip: Run this command in your terminal to install the skill