Server-rendered repaint for a shell that is already running. data is an ANSI stream to write verbatim into a fresh terminal.
data
Sequence of the last shellData chunk folded into this snapshot. Broadcasts carry the same counter, so a client applies the snapshot and then only the chunks whose seq is greater — no gap, no double-render.
shellData
seq
Server-rendered repaint for a shell that is already running.
datais an ANSI stream to write verbatim into a fresh terminal.