cmux: The Terminal Built for AI Coding Agents

https://www.youtube.com/watch?v=RhCHVg8klD4 You're running eight coding agents at once. One just finished a refactor. Another hit an error three minutes ago. A third is waiting for your input. But you're staring at a wall of tmux panes, and they all look exactly the same. Control-B, N. Control-B, N. Control-B, N. Cycling through, hoping you'll notice which one needs you. This is how most developers run agents today — blind, no status, no notifications, just guessing. And the more agents you run, the worse it gets. What if the terminal itself could tell you? What cmux Actually Is cmux is not a tmux plugin. Not a wrapper. Not a configuration hack. It's a completely new terminal emulator, built from scratch for macOS. Under the hood, it uses libghostty , the same rendering engine that powers Ghostty. So you get GPU-accelerated rendering, proper font shaping, and native macOS integration. But the real difference isn't the rendering — it's that cmux was designed from day one to understand w