概要
This skill facilitates the 'RED' phase of Test-Driven Development (TDD) by creating robust, failing test suites that serve as living specifications for new features. It covers the entire architectural stack—from Zod-based entity validation and business logic use cases to API endpoints and Playwright E2E flows—ensuring that every requirement is defined and verified before any implementation code is written. By integrating mandatory research via Context7, it ensures that all tests adhere to the latest industry patterns for Vitest, Playwright, and security-focused authorization logic.
