cmux

cmux is a native macOS terminal application purpose-built for agentic coding workflows. Built on libghostty for GPU-accelerated rendering, it combines vertical tabs, split panes, and an embedded scriptable browser into a lightweight Swift + AppKit app with no Electron overhead. It works with any terminal-based coding agent—Claude Code, Codex, Gemini CLI, Aider, Goose, Cline, Cursor Agent, and more—right out of the box.

• Vertical tabs: Sidebar displays git branch, working directory, open ports, and notification text for each session, making it easy to manage multiple agent tasks simultaneously.
• Notification rings: Panes visually light up and show unread badges when agents need attention, triggered via standard terminal escape sequences (OSC 9/99/777) or the cmux CLI and Claude Code hooks.
• In-app browser: Split a browser panel alongside your terminal with a scriptable API, keeping documentation and pull requests visible without leaving the app.
• Split panes: Supports horizontal and vertical splits within each tab for flexible workspace layouts.
• Scriptable CLI & socket API: Automate and script terminal sessions programmatically, enabling advanced agentic workflows and integrations.
• GPU-accelerated rendering: Powered by libghostty for smooth, high-performance terminal rendering.
• Lightweight native app: Built with Swift + AppKit—no Electron—for minimal resource usage and fast startup.
• Extensive keyboard shortcuts: Customizable shortcuts for workspaces, splits, browser, and notifications; terminal keybindings read from your Ghostty config file.
• Universal agent compatibility: Any agent that runs in a terminal works immediately—no special configuration required.
• Free and open source: The full source code is available on GitHub under the manaflow-ai organization.