Conversation about a page
A writing assistant beside a docs page: the reply streams in word by word, Send becomes Stop while it does, and the list follows new text until you scroll up.
Chat
Prompt composer
A composer that grows with the text, takes files from the picker or a drop, lets you pick a model and fills itself from suggested prompts.
Reasoning and tool calls
A reply that shows how long it thought, folds its reasoning, runs two tool calls from running to done and cites its sources.