127.0.0.1.
Quick Start
1
Send your first message
Type in the composer and press
Enter. The reply streams in as the agent produces it.2
Watch the events render
Text, a live reasoning panel, tool cards, and a usage line all appear in the same turn as they stream.
3
Act on the turn
Hover a turn to Copy, Regenerate, Fork, or Delete it.
How It Works
The engine sends Server-Sent Events onPOST /chat. Each event carries a msg_id so the client can address a specific message rather than assuming the last one is live.
Every event the stream emits (from engine/server.py):
A stream that yields nothing is reported as an
empty error, not a blank answer — silence is treated as a failure.Capabilities
Reasoning panel
Reasoning panel
When the model emits reasoning, a live “Thinking… Xs” panel shows it and collapses to “Thought for Xs” when the turn ends. Toggle it with Show reasoning and Collapse reasoning by default in Settings.
Tool cards
Tool cards
A
tool_call opens a card with a running dot; tool_drafting previews the arguments; tool_result fills the result pane. Long output is tail-truncated with Show all and Copy output.Attachments
Attachments
Drag-drop or use the + button. Chips show each file’s size. Limits: 2 MB max, up to 5 files, each clipped to 100 kB of text before it is sent. Long pastes condense into an attachment instead of filling the context.
Cancel, regenerate, fork
Cancel, regenerate, fork
Stop cancels a live run — the client is told explicitly with a
cancelled event rather than inferring it from silence. Per-turn hover actions cover Copy, Regenerate, Fork (POST /fork/{cid}/{idx}), and Delete message (DELETE /messages/{cid}/{idx}).Keyboard Shortcuts
Related
Approvals & Safety
How tool calls are approved before they run
Conversations & Search
Fork, delete, projects, and
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