shadcn/ui + Tailwind v4 — Build Skill

Governs every UI change in this project so it stays consistent with the real design tokens (references/DESIGN.md — all 1,804 variables, blue-primary theme).

Always treat references/DESIGN.md as the source of truth for tokens / colors / spacing. It is large — read §A first; load the deeper sections (§B–§P) only when you need a specific value.

Stack: Next.js (App Router) · shadcn/ui · Tailwind v4 (CSS-first) · blue-primary theme (--primary = blue-600) · TypeScript

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