coss ui

Use this when the project is on Base UI and Tailwind v4 and you want variants rather than bare primitives — the 500 particles are the real value, so instead of hand-building the 12th button style, pull p-button-N or p-calendar-N and edit. Initialize new projects with `pnpm dlx shadcn@latest init @coss/style` to get the tokens, sidebar variables and Inter/Geist Mono wiring in one shot; on an existing shadcn project add @coss/ui and @coss/colors-neutral separately so you keep your own theme. Two cautions: it is self-declared early development on top of Base UI's own beta, so pin what you copy; and the repo is AGPL-3.0 except the apps/origin and apps/ui directories, which matters if you vendor anything beyond the component files.

Why it is here. A 500-variant registry maintained as a real company's production design system is rare — most shadcn registries are one-person variant dumps, and this one ships with the migration path off Radix that the ecosystem is about to need.