Ballmac UI

Accessible React + Tailwind v4 components, blocks and templates in one design language. You add what you need with the shadcn CLI and the source lands in your project, ready to read and change. Your AI coding agent can search and install them too, through MCP. Now listed in the official shadcn registry directory.

Site and docs: ui.ballmac.com

What is in it

• 240+ components: primitives, forms, data display, navigation, feedback, motion, backgrounds, text effects, AI interfaces, developer tools, device frames and desktop-style surfaces.
• 60+ blocks and 17 templates: heroes, pricing, dashboards, sign-in, settings and more, composed from the components.
• 12 themes with a live builder, light and dark. Motion is part of the theme: speed, bounce, travel, hover and stagger, five ready-made feels, and a reduced-motion fallback. Data and form blocks show loading, empty, error, submitting and success through one state prop. Platform feels make every component handle like macOS, iOS or Windows, with window chrome for Tauri and Electron apps.
• Built to a standard: every item has examples, keyboard support, reduced-motion handling, right-to-left support and one translation provider for its built-in text. See AUTHORING.md.
• Made for AI agents: each item carries a description, when to use it and when not to, what it composes with, and keyboard notes. Available through llms.txt, a JSON API and the @ballmac/mcp server.
• No collisions: everything installs into components/ballmac/, so it never overwrites your shadcn/ui files.
• Verified installs: the release check installs every item into a fresh Next.js app, then type-checks and builds it.

Quick start

You need a project with React 19, Tailwind CSS v4 and shadcn set up (npx shadcn@latest init; it creates components.json). Both the Base UI and Radix styles work: components built on Radix UI also come in a Base UI version (guide).

# add components by name; npm dependencies are installed for you
npx shadcn@latest add @ballmac/button @ballmac/dock

import { Button } from "@/components/ballmac/button"

@ballmac is in the official shadcn registry directory, so there is no registry to configure. On an older CLI, or to pin the address, run npx shadcn@latest registry add "@ballmac=https://ui.ballmac.com/r/{name}.json" once, or install by URL: npx shadcn@latest add https://ui.ballmac.com/r/button.json. Browse and preview everything at ui.ballmac.com/components, and see the installation guide for the optional Ballmac theme.

Use it with an AI agent

claude mcp add ballmac -- npx -y @ballmac/mcp

Or install the skill, which teaches the agent the method (find, install, build to the rules, check) and reads your project first:

npx skills add vamsiy78/ballmac-ui

The server is read-only and needs no account. It searches the catalog, returns props, keyboard behaviour and source, gives the exact install command, and can plan a whole page from blocks. Setup for Cursor, VS Code, Windsurf, Codex and Claude Desktop is in the MCP docs and in packages/mcp. The official shadcn MCP server also works with this registry.

Free and Pro

	Free (this repository)	Pro
Components, blocks, templates, themes	All of them, MIT licensed	Everything in Free
Premium blocks		150 more: heroes, features, pricing, dashboards, app screens, ecommerce, content and more
Starter apps		Beacon SaaS (teams, Stripe billing, dashboard), Quire (an AI assistant that cites its sources) and Cove (a Tauri desktop app that looks native on macOS and Windows)
Design tokens		Figma tokens for every theme
How you get it	shadcn add @ballmac/...	A private registry (@ballmac-pro) with a licence key, or log in on the site to copy code and download the starters

Pro is commercial and licensed separately: its source is not in this repository. Details and pricing at ui.ballmac.com/pricing, setup at ui.ballmac.com/docs/guides/pro.

Repository

Path	What
registry/ballmac/	Item source. Paths mirror install locations: components/x.tsx installs to @components/ballmac/x.tsx
registry/ballmac/**/<name>.meta.ts	Item metadata: the single source of truth for the registry, site, search, llms.txt and MCP
registry/examples/	Examples, published as registry:example items
packages/metadata/	The metadata schema
packages/theme-engine/	Theme presets and the colour engine behind the theme builder
packages/mcp/	The @ballmac/mcp server
apps/www/	The website, registry hosting (/r/*.json), the JSON API and llms.txt
scripts/	Registry build and quality checks
.github/	CI, the MCP release workflow, issue and pull request templates

Develop

Needs Node.js 22 (what CI runs) and pnpm 10 (the repo pins it; corepack enable installs the right version, or use npx pnpm@10). The Pro registry is optional: without it the site builds with the free items only.

pnpm install
pnpm build:registry   # validate metadata, generate registry.json, run `shadcn build`, write site data
pnpm dev              # website on http://localhost:3000

Command	What it does
pnpm check	Dependency truth, licence provenance, RTL and translation checks, output schema validation
pnpm lint · pnpm typecheck · pnpm test	The usual
pnpm smoke	Install every item into a fresh Next.js app, then tsc and next build (needs network access to ui.shadcn.com)
pnpm a11y [name…]	axe on every /preview/* page in light and dark; run (cd apps/www && npx next build) first, and install the browser once with pnpm exec playwright install chromium

A11Y_BASE_URL points the accessibility scan at a site that is already running.

Add an item

1. Write the source under registry/ballmac/components/ (import cn from @/lib/utils, other items from @/components/ballmac/...).
2. Add <name>.meta.ts next to it with defineItem({...}): description, category, dependencies, examples, notes for AI agents, and source if any code came from elsewhere.
3. Add examples under registry/examples/.
4. Run pnpm build:registry && pnpm check && pnpm smoke && pnpm a11y <name>.

AUTHORING.md is the full standard.

Contributing, support and security

• Contributions are welcome: read CONTRIBUTING.md and the code of conduct.
• Bugs and requests: open an issue. Questions, or help with an item, a purchase or a licence key: ui.ballmac.com/support.
• Security problems: report them privately as described in SECURITY.md.
• Release notes: CHANGELOG.md and ui.ballmac.com/changelog.

License

Free components, blocks, templates and the MCP server are MIT licensed (see LICENSE). THIRD_PARTY_NOTICES.md credits the open-source work they build on. Ballmac UI Pro is licensed separately.