cmux
Installation
SKILL.md
cmux Orchestration
Orchestrate terminal sessions, spawn Claude Code instances, automate the built-in browser, preview markdown — all inside cmux.
Detection
Check CMUX_WORKSPACE_ID env var. If set → you're in cmux. If unset → skip all cmux commands.
Auto-set env vars: CMUX_WORKSPACE_ID, CMUX_SURFACE_ID, CMUX_SOCKET_PATH.
Hierarchy
Window > Workspace (sidebar tab) > Pane (split region) > Surface (terminal tab in pane).
Short refs: workspace:1, pane:1, surface:2.