What problem does it solve? Choosing between React UI component libraries like shadcn/ui, HeroUI, Material UI, and shadcn-ecosystem registries is hard without structured comparison. This Skill provides a curated selection matrix plus a working pnpm + React + TypeScript showcase project where each library gets its own styled page. ## Core Features & Use Cases - Selection Matrix: Compares shadcn/ui, HeroUI, Material UI, UI TripleD, Tailark UI, ReUI, shadcnblocks, and Kokonut UI by type, best-fit scenarios, and situations to avoid. - Showcase Project: A Vite + React 19 + TypeScript app with a shared LibraryProfile data contract, per-library page files, and Vitest/Testing Library tests. - Sub-agent Workflow: Includes a ready-to-use prompt for dispatching eight sub agents to implement original styled pages in parallel without breaking shared contracts. - Use Case: When starting a new SaaS marketing site, consult the matrix to pick Tailark UI over Material UI, then extend the showcase page to prototype the visual direction. ## Quick Start Ask the assistant to compare these eight React UI component libraries for your product type, or to implement a styled showcase page for one library in the showcase project.