cmux: Open-Source Terminal for Coding Agents with Visual Notifications
By
Garry Tan
FeedBagel synthesis
· 2 sourcescmux, an open-source macOS terminal application built on the Ghostty terminal, was released to provide visual notifications and organization for AI coding agents. Product Hunt reported that the terminal features vertical tabs, pane glowing, and sidebar notifications to alert users when agents like Claude Code need attention. Hacker News added that the app includes notification rings and a notification panel to manage pending alerts, along with an in-app browser. The application is built using Swift/AppKit rather than Electron or Tauri, according to Product Hunt.
Crumbles when you bite it. Light on filling.
Summary
cmux is an open-source terminal application specifically designed for working with coding agents. It features vertical tabs, notifications, a built-in browser, and is built on the Ghostty terminal. The terminal provides visual cues when coding agents like Claude Code need user attention, with pane glowing and sidebar notifications. It's built using Swift/AppKit rather than Electron or Tauri frameworks.
Key quotes
· 4 pulledcmux is the open-source terminal built for multitasking with coding agents
When Claude Code needs you, the pane glows blue and the sidebar tells you why
No Electron/Tauri. Just Swift/Appkit
It has vertical tabs, notifications, a built-in browser, and it's built on Ghostty
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