# File Tree

> Explorer-style file tree with animated folders, highlighted indent guides and type-tinted icons. Implements the WAI-ARIA tree pattern: one tab stop, arrows, Right/Left to open, close or jump to parent.

- Slug: `file-tree`
- Category: [Accordions](https://www.assembli.design/category/accordions.md)
- Type: component
- Tags: tree, files, explorer, aria
- npm dependencies: motion, lucide-react
- shadcn/ui dependencies: none
- Added: 2026-10-15
- Live preview: https://www.assembli.design/preview/file-tree
- Page: https://www.assembli.design/components/file-tree

## Install

One-time setup (needs a subscription):

1. Add the registry to the project's `components.json`: `{"@assembli":{"url":"https://www.assembli.design/r/{name}.json","headers":{"Authorization":"Bearer ${ASSEMBLI_API_KEY}"}}}` (merge into `"registries"`).
2. Put an API key from https://www.assembli.design/account in `.env.local` as `ASSEMBLI_API_KEY=asm_…`.

Then install with the shadcn CLI (writes `components/file-tree/file-tree.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/file-tree
```

Registry item JSON: https://www.assembli.design/r/file-tree.json (send `Authorization: Bearer <api key>`)

## Code

> Component source needs an Assembli subscription ($12/month) and an API key sent as `Authorization: Bearer <key>`. To get one without copying anything, POST https://www.assembli.design/api/agent/login (or call the MCP tool connect_account), show the user the link it returns, and poll https://www.assembli.design/api/agent/token for the key. Or subscribe at https://www.assembli.design/pricing and create a key at https://www.assembli.design/account.