cmux

Open source (GPL licensed) macOS terminal with vertical tabs and notifications for AI coding agents. Built with libghostty. The vertical tabs support agent status and currently running server URLs. The CLI enables automation and scripting of panes. And a built-in web browser is useful for doc reference as well as creating or reviewing PRs. I had trouble using cmux and Ghostty based terminals for due to a conflict with SketchyVim which took me some time to locate. The conflict caused the terminal to become intermittently unresponsive. After disabling SketchyVim, Ghostty and cmux became usable, and I switched over from iTerm2. In my experience, cmux builds have recently become more stable — no crashers for the last 2 weeks using the latest builds — so now is a good time to try it out. Source