# cloudflare/kumo

Cloudflare's component library for building modern web applications.

Repository: https://github.com/cloudflare/kumo
Canonical: https://ross.abutalabs.com/products/kumo
Homepage: https://kumo-ui.com
Language: TypeScript
License: MIT
License Family: permissive
Last push: 2026-08-26T16:56:14+00:00

## Health v2 (maintenance only)
Score: 83/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 98, longevity 21
- inputs: {"age_days": 307, "days_push": 7, "days_rel": 13, "gap_med": 2.0, "n_releases_24m": 47}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3465, forks 168 (observed 2026-08-28T04:08:05.720437+00:00)

## What it is
Kumo is Cloudflare's open-source React component library providing accessible, design-system-compliant UI components built on Base UI. It ships as an npm package with a companion CLI for querying component docs, a Figma plugin for design token sync, and a live documentation site.

## Use cases
- build accessible react ui components
- react component library with keyboard navigation and aria support
- design system components for web apps
- add dialogs, dropdowns, tables and toasts to a react app
- query component documentation from the cli
- sync design tokens between figma and code
- charts and data visualization components for dashboards

## When to choose
- you are building a React web application and want pre-built accessible components
- you want a design-system-consistent look without hand-rolling ARIA and focus management
- you need tree-shakeable granular imports and Base UI primitives
- you work in the Cloudflare dashboard ecosystem or want its design language

## When to avoid
- your project is not React-based
- you need fully custom visual design rather than a design system
- you want a headless-only solution without styling opinions
- you need Vue, Svelte, or Angular components

## Facets
- artifact type: library
- maturity: active
- function: ui-components, frontend-framework, cli, data-visualization, accessibility, theme
- domain: web-development, frontend, developer-tools, web-design
- platform: cross-platform
- tags: react, component-library, design-system, base-ui, typescript, figma-plugin, tailwind, cloudflare, nodejs, web-server

## Member repositories
- cloudflare/kumo (main) score 83

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:05.720437+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:36:52.604722+00:00, confidence not recorded.
  - readme: https://github.com/cloudflare/kumo (fetched 2026-08-28T04:08:05.720437+00:00, sha a016b2051aae)
  - homepage: https://kumo-ui.com (fetched 2026-08-29T09:31:06.622854+00:00, sha 1df99c14c5a9)
  - site_page: https://kumo-ui.com/installation (fetched 2026-08-29T09:31:06.644724+00:00, sha beafd693872c)
  - site_page: https://kumo-ui.com/changelog (fetched 2026-08-29T09:31:06.676654+00:00, sha 9158de0295c3)
- Data as of 2026-08-30T08:39:29.467469+00:00.