# shadcn/ui

The source-first React component system, official blocks, themes, and registry format.

## Provenance
- Resource: https://form-atlas-ten.vercel.app/resources/shadcn-ui
- Website: https://ui.shadcn.com/
- Repository: https://github.com/shadcn-ui/ui
- License evidence: https://github.com/shadcn-ui/ui/blob/main/LICENSE.md
- License label: MIT
- Access: Open source
- Scope: The repository and official registry are open source; this describes upstream source, not a guarantee that every linked community item is free.
- Research date: 2026-09-07
- Registry: https://ui.shadcn.com/r/styles/new-york-v4/registry.json

## Use this for
Starting a React product with copyable primitives and semantic tokens.

## Available artifacts
components, blocks, themes, registry-json, agent-skill, css-vars

## Agent guidance (Form Atlas editorial)
Read components.json and the target registry item before coding; copy exact files and dependencies instead of recreating the component.

## Verification boundary
This is a source-level research record, not an item-level audit. Registry counts may include examples, variants and paid content. Inspect the exact upstream files, license, dependencies and framework version before installation. No upstream code is mirrored here. The visual on Form Atlas is an original illustrative sample, not an upstream screenshot.