CLI

The zz binary is the GUI, the daemon, and the CLI. Any supported tmux command works from any shell against the running daemon:

zz list-panes
zz send-keys -t %3 'make test' Enter
zz split-window -h
zz new-window -n logs
zz detach-client

Targets use tmux syntax: $session, @window, %pane, all stable for a pane’s lifetime, visible in choose-tree and display-panes.

Beyond tmux

Command	What it does
zz new-window --kind browser [--profile NAME] [URL]	new window with a browser pane
zz split-window --kind browser [--profile NAME] [URL]	split into a browser pane
zz set-browser-url -t %N URL	navigate a browser pane
zz capture-browser -t %N -o /tmp/out.png	screenshot a browser pane (absolute path)
zz split-window --kind picker [-h|-v]	split into an empty pane and pick its type
zz tools	the command catalog written for agents

Two more verbs, zz agent-send and zz send-last-output, talk to an Agent pane. They need experimental-agent-pane on and a pane to aim at; see agent panes.

Sessions

The daemon starts on first launch and outlives every window. Closing a window detaches. PTYs, layouts, scrollback, and browser URLs and profiles all survive and come back on reattach. Persistence is daemon-lifetime: a reboot starts fresh.