Bottom panes

Between the status bar and the input editor sits the bottom dock: five passive panes stacked in mount order (activity → queue → todo → btw → agents, editor last). Panes with nothing to say render zero rows — the dock never jumps.

Activity pane

A mode machine over the attached session's event stream, telling you what the agent is doing:

Mode	Presentation
waiting / tool	moon spinner + rotating tip (a new tip when the loading kind changes)
composing	braille working... line (primary-colored frames + an inline tip) — no output cursor; this line is the "writing" signal
thinking	cleared (the spinner belongs to the transcript's thinking block)
idle	a one-row placeholder (stable dock edge)
dialog open	the row hides (a panel holds the editor slot)

Queue pane

Follow-ups you submit while the agent runs queue in the harness inbox — the pane lists them: one row per message with a queued ↑ turn:|step: prefix. Empty queue, zero rows.

Up recall: with an empty editor buffer, pressing ↑ removes the most recent queued message and puts its text back into your draft (steer intent wins over next-turn). Without the queue pane, ↑ goes to editor history.

Todo pane

The session's todo list (whole-list snapshots, last-write-wins) renders under a kimi-style flat-rule frame: a Todo title + three-state dots — ✓ completed (muted, struck through), ● in progress (primary, bold), ○ pending.

• Five-row folding — long lists fold to all in-progress first, then the earliest pending and the latest completed; a one-row footer … +N more (2 done · 1 pending) · ctrl+t to expand accounts for the hidden items.
• Ctrl-T toggles between folded and full (all N items · ctrl+t to collapse); the expanded state survives writes and resets on session change or a settled list.
• All-completed auto-close — the next write reopens folded.

todo_write calls never appear in the transcript; this pane is the list's only surface.

Side-question pane (/btw)

/btw <question> forks the current session into a throwaway side agent — seeded with the full event stream, inheriting the parent's provider/model — to ask an "by the way" question without disturbing the main line:

• pane title BTW + key hints (Esc close, plus ↑↓ scroll when the body overflows);
• a › question row + streaming Markdown reply + a thinking line; the line budget adapts to terminal height (re-flowing on resize);
• while open, the editor's top corner joins the pane with ├┤; Esc closes (draft survives), ↑↓ scroll, Enter asks a follow-up on the same side agent;
• one slot at a time: a new /btw disposes the previous side agent first; a bare /btw closes the pane.

Subagent-group pane (agents)

While the agent's subagent group runs, its group card is pinned directly above the editor — the last dock row (the kimi swarm-pane semantics). Like the todo pane's relationship to todo_write: spawn-class tool calls are suppressed from the session stream by the step fold, and this pane is the only surface where running subagents appear — you can see who was spawned and what each is doing without digging through tool cards in the transcript.