cmux — What is it?

Panes and tabs are highlighted with blue rings and lights, respectively, when AI coding agents require attention, enhancing visibility and efficiency.

A dedicated panel displays all pending notifications, allowing users to quickly access and respond to them, improving workflow management.

An integrated browser allows for side-by-side terminal and browser usage, with a scriptable API for automation and interaction with development servers.

cmux supports both vertical and horizontal tab organization, with detailed sidebar information on each workspace, including git branch, PR status, and more.

SSH functionality allows for remote workspace creation, with browser panes routing through the remote network for direct integration.

cmux supports Claude Code's teammate mode directly, with native splits and sidebar metadata, eliminating the need for additional tools like tmux.

cmux can import cookies, history, and sessions from various browsers, ensuring that browser panes start in an authenticated state.

Users can define project-specific actions in `cmux.json`, accessible via the command palette, enhancing customization and workflow efficiency.

cmux offers a CLI and socket API for automation, including workspace creation, pane splitting, keystroke sending, and browser operations.

Built with Swift and AppKit, cmux provides fast startup and low memory usage, offering a native macOS experience over Electron-based alternatives.

cmux reads existing Ghostty configurations for themes, fonts, and colors, ensuring a direct transition for users familiar with Ghostty.

cmux use libghostty for terminal rendering, providing smooth and efficient rendering with GPU acceleration.