Profile scope and official documentation

Read docs/agents/stack.md when present. Applies to apps in the default frontend profile (Tailwind CSS v4 + shadcn/ui) or explicitly adopting it; other apps keep their styling conventions and this skill does not authorize a migration. The selected design system also applies to throwaway UI prototypes: use its theme, tokens and typography from the start. Structure and data rules live in react-architecture. Before editing authored components or validation scripts, invoke strict-typescript through the host mechanism, or read its installed SKILL.md if the tool is unavailable.

For facts start from https://ui.shadcn.com/llms.txt (theming, CLI, components.json, dark mode for Vite) and https://tailwindcss.com/docs/theme. pnpm dlx shadcn@latest docs <component> returns component docs for the project's base library. Match docs to the installed versions.

One theme, everywhere