概要
This skill automates and enforces a strict Test-Driven Development (TDD) cycle, guiding developers through writing user journeys and generating test cases before implementation. It ensures production reliability by mandating a minimum of 80% coverage across unit, integration, and end-to-end tests. By providing standardized patterns for Jest, Vitest, and Playwright, this skill helps teams eliminate technical debt, catch bugs early, and maintain a robust safety net for continuous refactoring and feature development.