cmux is a terminal multiplexer for macOS that combines Ghostty with vertical tabs and notifications designed for AI coding agents.
The tool addresses the challenge of managing multiple concurrent terminal sessions while working with AI-assisted coding workflows. It builds on Ghostty, a modern terminal emulator, and adds vertical tab organization alongside notification support specifically tailored for AI agents running in parallel. This design lets developers monitor multiple coding agents and tasks without switching between separate windows or traditional horizontal tab layouts.
Developers working with AI coding agents on macOS who need better organization and visibility across parallel tasks should consider this tool. It suits workflows where multiple agents run simultaneously and require monitoring through notifications rather than constant manual checking. The vertical tab interface provides an alternative to traditional terminal multiplexers like tmux, optimized for the macOS experience and AI agent integration rather than remote server management.
The project maintains active engagement across multiple communication channels and has documentation translated into numerous languages, indicating sustained international interest. Development appears focused on expanding the tool's capabilities for AI agent workflows and improving the user experience for macOS-specific terminal work.
