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cmux

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Control the cmux macOS terminal app: workspaces, panes, surfaces, browsers, notifications, settings, and hooks. Use only when the user explicitly names cmux. Read before running any cmux command.

skills/agent-orchestration/cmux/SKILL.md

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# cmux Control

macOS 14.0+. Prefer the CLI; if `cmux` is not on PATH, use `/Applications/cmux.app/Contents/Resources/bin/cmux`.

## Targeting and safety

**Window → workspace → pane → surface:** macOS window → sidebar project/branch tab → split region → terminal, browser, or Markdown tab.

- **Anchor to the caller's `CMUX_WORKSPACE_ID`.** Never assume the visually focused workspace is the target. Outside cmux, identify the intended workspace before acting.
- **Use prefixed refs or UUIDs.** `workspace:2`, `pane:1`, `surface:7`; bare numbers are indexes, not IDs. Output defaults to refs; `--id-format uuids|both` includes UUIDs.
- **Refresh targets.** Surface refs are global, not workspace-local. Re-list before reusing them; check `cmux surface-health` before sending input when state may be stale.
- **Preserve focus.** Pass `--focus false` wherever supported. Use `select-workspace`, `focus-pane`, `focus-panel`, or `focus-surface` only on explicit user request.
- **Respect ownership.** Never send input to surfaces you do not own. Stay in the caller's workspace unless the user explicitly requests cross-workspace routing.
- **Reuse one helper pane.** Use an existing non-caller helper pane or create one on the right. Create the intended layout directly with `new-pane --type … --focus false`.
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