This is the desktop window, drawn on the web so you can try it without installing anything. The boxes below are the real layout: the chats panel, the model pill, the prompt box. What is not real is where the answer comes from. Here it comes from this site's free window; the app answers from your own machine, keeps every chat in a file on your disk, and never sends a prompt here.

Where should we begin?

Type anything and an answer comes back in this window. Reading a folder, running a tool, keeping the chat: those are the app's, because a page has no disk.