I run three or four coding agents at once and the part that eats my time isn't the coding, it's that I can't tell what state any of them is in without tabbing through every terminal. One of them is usually sitting on a permission prompt I never saw.

agent-manager is a Go binary on top of tmux. No config file, no daemon, no server. Every agent shows up in one list with a live status, grouped by the project it's running in. Status comes from reading the pane, so adding a CLI is a few lines of regex in a toml file rather than an integration.

The keystroke I use constantly is space: press it on an agent, type, enter, and the prompt lands in that agent's pane without attaching. Press it on a project row and you get a new agent already working on what you typed. ctrl+r opens what an agent changed as whole files with the diff highlighted, and a comment left on a line is sent back to that agent as a prompt.

Sessions are plain tmux sessions, so quitting the manager leaves everything running and v reattaches a session with its conversation intact.

I built it for four agents and most days I use it with one. Still rough in places, and I'd like to hear what breaks for you.