cmux Terminal & Browser Management

Use this skill when you need to run processes in separate terminals you can observe and control — dev servers, test watchers, build processes, or any long-running task. Also use it to open browser surfaces for testing web pages, taking screenshots, clicking elements, and reading page content.

Prerequisite: You must be running inside cmux (check for CMUX_SOCKET_PATH in the environment). If it's not set, these commands won't work.

Default approach: Prefer creating surfaces (tabs) in the current workspace over spawning new workspaces. Tabs keep everything grouped together and are less disruptive. Only use new-workspace when you need full isolation (e.g., a completely separate project).

Environment Variables