herdr is moderately well known if you look into agent multiplexers. IMO it is the best one from what I have tried (Paseo and Conductor are competitors in this area)
It's not a harness -- it's really more like a tmux for agents.
It's not a harness -- it's really more like a tmux for agents.
A harness is what does the model loop, tool calls, etc
herdr does none of this. It’s really just a tmux/terminal geared towards organizing harnesses like Claude Code or Codex CLI
It’s a really great approach because you can use whatever cli you want, or even a mix.