# Chat Attachments

> Chat composer attachments: drop files anywhere on it for a dashed drop overlay, pick them with the paperclip or paste images. Each file becomes a tile above the field: image thumbnails, document tiles with type and pages or rows, an upload ring, a short reading state, and errors with Retry. Remove closes the gap, the footer estimates context use, and Send waits for uploads.

- Slug: `chat-attachments`
- Category: [AI chat](https://www.assembli.design/category/ai-chat.md)
- Type: component
- Tags: attachments, upload, composer, drag-and-drop, files
- npm dependencies: motion, lucide-react
- shadcn/ui dependencies: button
- Live preview: https://www.assembli.design/preview/chat-attachments
- Page: https://www.assembli.design/components/chat-attachments

![Chat Attachments preview](https://www.assembli.design/thumbnails/chat-attachments-light.png)

## Props

Other props pass through to the root element.

| Prop | Type | Default | Description |
| --- | --- | --- | --- |
| `files` | `ChatAttachment[]` |  |  |
| `defaultFiles` | `ChatAttachment[]` | `[]` |  |
| `onFilesChange` | `(files: ChatAttachment[]) => void` |  |  |
| `accept` | `string` |  | Same syntax as an input's accept: ".pdf,image/*,text/csv". |
| `maxSize` | `number` | `20 * 1024 * 1024` | Bytes. Defaults to 20 MB. |
| `maxFiles` | `number` | `10` |  |
| `upload` | `AttachmentUploader` |  | Without one, files are ready as soon as they're added. |
| `onSend` | `(text: string, files: ChatAttachment[]) => void` |  |  |
| `placeholder` | `string` | `"Ask about these files…"` |  |

## 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/chat-attachments/chat-attachments.tsx` and installs dependencies):

```bash
npx shadcn@latest add @assembli/chat-attachments
```

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

## Code

> Component source needs an Assembli subscription ($12/month or $96/year) 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.