herdr

A free, open-source terminal multiplexer, like tmux, built for coding agents: each agent gets its own pane, and a sidebar shows which are working, blocked or done.

Verdict
Worth testing
The job
Running several agents at once
Last checked

If you run more than one agent at a time, it shows at a glance which one is waiting on you, and sessions keep running after you detach, even when you reattach from a phone over ssh. It is new and built mostly by one developer, so run it on your own work before you rely on it for client deadlines.