Built something that takes this a step further for audio: Voxlert gives each agent session a distinct character voice (SHODAN, StarCraft Adjutant, GLaDOS, HEV Suit). When your Claude Code / Cursor session finishes or needs input, you hear a contextual phrase generated for that event — not a generic chime.

The practical thing cmux does (knowing which session needs attention without looking) is the same problem I started with. Voxlert solves it via audio identity per session rather than visual tabs.

Would love to know if there's appetite for pairing them — cmux for the terminal UI, Voxlert as an audio layer on top.

https://github.com/settinghead/voxlert