shadcn

Run npx shadcn@latest add followed by component names, registry namespaces like @magicui/item, or GitHub addresses like owner/repo/item. Use --dry-run and --diff first to preview exactly which files would change before writing anything.

Run npx shadcn@latest add <component> --dry-run to see affected files, then --diff <file> to compare upstream changes against your local version. Apply upstream updates per file while preserving your modifications, and never use --overwrite without explicit approval.

The base field in components.json determines the primitive library and component APIs. Radix uses asChild for composition while Base uses render, and components like Select, ToggleGroup, Slider, and Accordion have different props between the two.

Use npx shadcn@latest apply <code> to overwrite an existing project's preset, or init --preset <code> --force --no-reinstall to update only config and CSS. Never decode preset codes manually; use preset decode, preset url, or preset resolve commands instead.

shadcn/ui rules require flex with gap-* for spacing and semantic tokens like bg-primary or text-muted-foreground for colors. Raw values like bg-blue-500 and space-y-* break theming, dark mode, and component consistency.

Yes, the CLI supports monorepo scaffolding via the --monorepo flag with templates like next, vite, start, react-router, and astro. Laravel is the only template without monorepo support.