Create, implement, review, and visualize opinionated design systems that resist AI slop convergence
UI design reviewer distilled from Refactoring UI principles. Reviews screenshots, code, and descriptions for hierarchy, spacing, typography, color, depth, and polish — with concrete CSS fixes and named anti-patterns.
Frontend UI development and mobile application implementation across platforms
UIコンポーネントの props・state・イベント・条件分岐を静的解析し、最低限必要なテスト数（全組み合わせ直積）を計算してカバレッジギャップをレポートする。.tsx/.jsx/.vue/.svelte に対応し、テストフレームワーク（Vitest/Jest/Playwright/Cypress）を package.json から自動検出する。
Use this agent when building user interfaces, implementing React/Vue/Angular components, handling...
Creating beautiful, functional user interfaces and design systems that can be implemented quickly