# AI chat assistant app shell with floating sidebar, model picker grid, and prompt composer

> AI chat workspace: floating collapsible sidebar with a GPT-4/Claude/Gemini model picker, pinned and recent threads, a welcome canvas, and an InputGroup composer. shadcn Sidebar, DropdownMenu, Avatar, ReUI Badge. LLM assistant, chatbot, copilot UI.

A paid shadcn/ui block sold by the [@reui](https://reui.io/?utm_source=shadcn.exchange) registry, listed on [shadcn.exchange](https://shadcn.exchange/r/reui/app-shell-17).

- Page, with a preview: https://shadcn.exchange/r/reui/app-shell-17
- Screenshot: https://abzjhwgwpdpz7ua5.public.blob.vercel-storage.com/shots/reui/app-shell-17-light-0d078ac8927c0c9c.png
- Listed: 2026-10-13

## Buy and install

@reui sells this block, and its code is not on shadcn.exchange. Buy it from the registry, which installs it for those who have: https://shadcn.exchange/out/reui/app-shell-17

## Dependencies

- npm packages: `cn`, `next-themes`
- Registry items: `@reui/badge`, `avatar`, `button`, `card`, `dropdown-menu`, `field`, `input-group`, `item`, `separator`, `sidebar`