cosscom/coss
coss.com/ui is the official design system of Cal.com observed · 2026-08-28
Health v2 · maintenance only
66/100
- Activity 98
- Release rhythm 35
- Longevity 49
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 687
- days_rel: n/a
- days_push: 14
- n_releases_24m: 0
Adoption not part of the score
10479 stars · 531 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
coss.com/ui (formerly Origin UI) is the official design system of Cal.com, a collection of accessible, composable React UI components built on top of Base UI and styled with Tailwind CSS. Following the shadcn/ui copy-paste ethos, components are added to your codebase via CLI so you own the source code.
Use cases
- add accessible react components to my app
- shadcn/ui alternative built on base ui
- copy-paste ui components for nextjs
- design system for react with tailwind
- migrate from radix ui components
- find a date picker or combobox component for react
- ui component library built for developers and ai
When to choose
- you want shadcn/ui-style copy-paste components with Base UI primitives underneath
- you're building a React/Next.js app with Tailwind CSS and want accessible, well-designed components
- you want to own and customize component source code rather than depend on a package
- you're contributing to or aligning with the Cal.com design ecosystem
Facets
library · maturity experimental
ui-components frontend-framework theme accessibility web-development frontend web-design developer-tools shadcn-ui base-ui tailwindcss radix-ui design-system copy-paste-components cal-com nextjs tanstack-table component-library react typescript nodejs web-server
10 sources
- readme: https://github.com/cosscom/coss · fetched 2026-08-28 · 7db4cf3f4ca9
- homepage: https://coss.com · fetched 2026-08-29 · c82309e1afc1
- site_page: https://coss.com/ui/docs · fetched 2026-08-29 · 5e5ad76c99b3
- site_page: https://coss.com/ui/docs/components/accordion · fetched 2026-08-29 · c6d348d4f281
- site_page: https://coss.com/ui/docs/components/alert · fetched 2026-08-29 · 249f5ffe1403
- site_page: https://coss.com/ui/docs/components/alert-dialog · fetched 2026-08-29 · ce857470b902
- site_page: https://coss.com/ui/docs/components/autocomplete · fetched 2026-08-29 · 9e84c0636d37
- site_page: https://coss.com/ui/docs/components/avatar · fetched 2026-08-29 · 554fe98f0ae1
- site_page: https://coss.com/ui/docs/components/badge · fetched 2026-08-29 · 688a612d75f8
- site_page: https://coss.com/ui/docs/components/breadcrumb · fetched 2026-08-29 · 58408ef526ea
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| cosscom/coss | main | 66 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem