Native macOS terminal built for multitasking with coding agents, featuring vertical tabs and split panes.
cmux is a free, open-source native macOS terminal app built on Ghostty's rendering engine (libghostty) using Swift and AppKit. It provides vertical tabs with context (git branch, working directory, ports), notification rings when agents need attention, split panes, and an in-app browser with a scriptable API. A CLI and socket API enable automation, and the app works with any terminal-based coding agent including Claude Code, Codex, Cursor, and others. cmux is a product of cmux.