libtmux.control:submit-command

Queue copied tmux ARGV and return a REQUEST without waiting for its reply. EFFECT must explicitly be :READ or :MUTATION; it records caller intent, not a command restriction. TIMEOUT is a nonnegative real deadline budget starting at submission, including queue time. A zero budget can expire before dispatch. Commands execute serially. Full queues signal CONNECTION-BUSY; closing ones signal CONNECTION-CLOSED. Use argv for tmux syntax, not shell interpolation. This raw path does not validate or refresh captured operational targets.