cmux-cua

cmux bundles a local computer-use engine (packaged as cmux Computer Use with the MCP proxy named cmux-cua, from a pinned build of the manaflow-ai/cmux-cua fork) and attaches it as an MCP tool server named cmux-cua to every agent session cmux launches (Claude Code, Codex). The agent can then perceive and operate real macOS apps: read the accessibility tree, take screenshots, and click / type / scroll / drag.

Everything runs locally through the bundled cmux Computer Use helper. The helper has its own TCC identity, so Accessibility and Screen Recording never belong to the main cmux app and granting Screen Recording never requires restarting cmux. Upstream telemetry and update checks are disabled at runtime.

Do not invoke this skill, start its helper, request permissions, or perform a GUI action when the user is only reading, asking about, quoting, or mentioning Computer Use. Wait for a direct user request to use Computer Use; missing tools or permissions are not a reason to begin setup automatically.