Connection.Call

Connection owns terminal control-mode transport to the exact daemon that materialized its session. Values obtained from Server or Session retain the connection. Closing is terminal: they neither reconnect nor fall back to a subprocess. Its lanes are attached tmux clients; closing the last client can trigger tmux's destroy-unattached or exit-unattached policy. Destroying its initial session moves the clients to another session when one exists; the retained Session value keeps its original identity.

ControlCommandResult is one completed control-mode command frame. A failed tmux command remains result data through Failed; local, protocol, transport, and context failures are returned separately by Connection.Call, ControlClient.Cmd, and ControlClient.Call. All slices are owned by the caller.