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Coss website preview

Coss

coss.com

A modern UI component library built on top of Base UI, shipping 510 particles designed for developers and AI coding agents.

What is Coss?

coss ui is a new, modern component library built on top of Base UI, positioned explicitly as built for developers and AI. The catalog spans 510 particles — accordion, alert dialog, autocomplete, calendar, command menus and more — each documented with its purpose for quick copying into a project. Docs ship with command-palette search and light/dark theming.

Best for

  • Copy-paste components on top of Base UI
  • Developers and AI agents building interfaces
  • Modern apps that need clean primitives

Key features

  • 510 particles across the component catalog
  • Built on top of Base UI primitives
  • Designed for developers and AI workflows
  • Command-palette docs with quick search
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