Conversations no longer vanish on reload: every chat has its own address, chats group into projects, and you can start without an account.
Previously a conversation disappeared with the tab. Now chats are saved: the sidebar lists recent ones, each chat has its own address so you can share it or open it in a new tab, and a separate page holds the full archive. Chats can be pinned, renamed and deleted; a title is generated automatically after the first message, so the list tells you what each conversation is about.
Chats can be grouped into projects — by client or by site, for instance. A project carries its own instructions that apply to every chat inside it. An existing chat can be moved into a project from its menu.
You can start all of this without registering: an account is created silently on your first message, and when you do sign in properly, everything you have done stays where it is.
Anyone running several sites or clients at once who would rather not hold the context in their head.
The sidebar opens from the button in the header. Projects and new-chat creation live there too. Every chat's menu has an "add to project" option.