cmuxterm

cmuxterm is a lightweight, native macOS terminal built on Ghostty for managing multiple AI coding agents. It features vertical tabs, a notification panel, and a socket-based control API.

Why cmuxterm?

• Native macOS app - Built with Swift and AppKit, not Electron. Fast startup, low memory usage, and native look and feel.
• Lightweight - Small binary, minimal resource footprint. No bundled browser engine.
• GPU-accelerated - Powered by libghostty for buttery smooth rendering.

When running AI coding agents like Claude Code, Codex, or similar tools, you need to:

• Manage multiple terminal sessions - Each agent runs in its own terminal
• Know when agents need attention - Agents waiting for input should notify you
• Automate terminal control - Programmatically create tabs, send input, and more

cmuxterm solves these with:

• Vertical sidebar tabs - All terminals visible at a glance
• OSC 99/777 notifications - Desktop alerts when agents need you
• Unix socket API - Full programmatic control for automation

Quick Start

brew tap manaflow-ai/cmuxterm
brew install --cask cmuxterm

Or download the DMG directly.

Key Features

Requirements

• macOS 13.0 or later
• Apple Silicon or Intel Mac