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cmux

cmux is a terminal multiplexer controlled via a Unix socket CLI. It manages windows, workspaces, panes, and surfaces. AI agents use it to spawn isolated terminal panes for parallel tasks, send commands, read output, and clean up when done.

All commands use cmux [--json] <command> [options]. Always pass --json when parsing output programmatically. References use short refs like pane:5, surface:12, workspace:3 - or UUIDs.

When to use this skill