# Copilot Chat block

> Inset right AI assistant chat sheet with prompt suggestions and pinned composer toolbar

Floating right-side AI chat panel with scrollable history, prompt suggestion chips, and a pinned InputGroup composer (attach, voice, send) plus header new-chat and refresh actions. Uses Sheet, ScrollArea, DropdownMenu. Copilot, assistant drawer.

- Type: Pro block
- Category: [Sheet](https://web.dev.reui.io/blocks/application/sheet.md)
- Page: https://web.dev.reui.io/blocks/application/sheet/sheet-10
- Docs (Base UI): https://ui.shadcn.com/docs/components/base/sheet.md
- Docs (Radix UI): https://ui.shadcn.com/docs/components/radix/sheet.md
- MCP: `get_block("sheet-10")`
- Built with: Button, Dropdown Menu, Field, Input Group, Scroll Area, Sheet, Tooltip
- Installs with a ReUI Pro or Ultimate license; setup: https://web.dev.reui.io/docs/license-setup

## Best for

Header New chat and Refresh context actions plus a menu that sends Summarize thread or Draft QA checklist, with auto scroll to the latest

## Agent notes

- `createAssistantReply` matches overdue, sheet, work, active or area in the prompt and returns canned text; replace it with your model call
- `INITIAL_MESSAGES` and `PROMPT_SUGGESTIONS` are ReUI themed sample chat and chips; replace them along with the Ask ReUI labels
- The composer plus, image, docs and voice `InputGroupButton`s have no `onClick`; only the send button submits the form

## When not to use

- The assistant is the main content of the page, not a panel over other work: use the [AI Chat blocks](https://web.dev.reui.io/blocks/ai-agents/ai-chat.md)

## Install

```bash
npx shadcn@latest add @reui/sheet-10
```

## About Sheet blocks

### When to use

- Record detail opened over a list or table: a ticket, metric, cron job, audit event, deploy, SLO or data source
- Create and edit forms in a side panel for a project, cron job, firewall rule, SLO or data connection
- Utility panels for help guides, keyboard shortcuts, an AI assistant, comments, notifications or view settings

### When not to use

- A bare side panel with your own header, body and footer, nothing prebuilt: use [Sheet](https://web.dev.reui.io/components/sheet.md) (`get_component("sheet")`)
- A persistent sidebar or navigation layout that stays around every page: use the [App Shell blocks](https://web.dev.reui.io/blocks/application/app-shell.md)
- An assistant conversation that fills the whole page rather than a side panel: use the [AI Chat blocks](https://web.dev.reui.io/blocks/ai-agents/ai-chat.md)

### Agent notes

- Each root renders a demo `SheetTrigger` button and opens on mount via `defaultOpen` or a `useState` seeded true; start it closed in your app
- Each `SheetContent` className floats it inset with `inset-y-4`, `right-4` and `rounded-xl` and sets its own width; resize it there, not in the primitive
- Each page.tsx only centers the trigger in a `min-h-svh` main with an `sr-only` h1; render the root component alone inside your page

Every ReUI item has a twin like this one; the index is https://web.dev.reui.io/llms.txt. Agents with the ReUI MCP (https://web.dev.reui.io/docs/mcp) get the same guidance from the getters named above.