The composer
Everything the message box can do: models, reasoning, permissions, slash commands, file mentions, attachments, queued messages, and rewind.
The composer sits under every agent transcript. Type a message and hit ⏎ to send; while a turn is running the button becomes Stop. Below the box runs the pill row — the agent's controls at a glance.
The pill row
| Pill | What it does |
|---|---|
| + | Attach files or images. Pasting and drag-and-drop work too. |
| Model | Searchable model picker — switches live, even mid-session. See Models & usage. |
| Reasoning | Thinking effort, from Low to Max. |
| Permission | How much the agent may do without asking (below). |
| ⚙ | Composer extras: a Fast mode toggle, plus actions plugins add (e.g. Save draft as template…). |
| tasks N/M | Appears once the agent starts tracking its own checklist — see Tasks. |
| Context ring | How full the model's context window is, with cost and a Compact button. |
Permission modes
Always ask confirms every tool use; Accept file edits auto-approves edits but asks for the rest; Auto mode lets the agent run with the CLI's standard guardrails; Plan mode makes the agent propose before touching anything — an inline Plan proposed card appears in the transcript with Approve and Keep planning; and Bypass skips permission checks entirely.
When an agent does need sign-off, the request docks right above the composer: permission prompts offer Deny / Allow always / Allow, and multiple-choice questions render as a card you can answer with a click or freeform text.
Slash commands & skills
Typing / opens autocomplete over everything the session can run: Claude Code's own commands and skills, plugin commands (like /prompt from the prompt library), and Atelier's built-ins:
/resume— open the session picker./recap— summarize what happened while you were away./compact— compact the conversation and reset the context ring.
@ mentions autocomplete file paths from the agent's working folder, so you can point at code precisely.
Queued messages
Sending while the agent is mid-turn queues the message as a chip above the composer — edit or remove it freely before it goes. Queued messages are delivered one per turn, or mid-turn as steering if Deliver queued messages mid-turn is on in Settings ▸ General. Stop clears the queue along with the turn.
Rewind
Hover any of your earlier messages and click the history icon to rewind the session to that point — Conversation only, or Conversation + files which also restores the working tree (the dialog shows exactly how many added and removed lines that undoes). Your message lands back in the composer, ready to edit and resend.
Voice dictation
A mic appears in the composer once a Voice input provider is selected in Settings ▸ Providers. The bundled Voice plugin provides on-device Whisper dictation — nothing you say leaves your Mac.