CLI 4.6.1

mf a2a send --stream and mf a2a tasks subscribe now print a peer’s answer once, when the stream ends, instead of writing each chunk as it arrives. A peer can replace an artifact it has already sent, and text written to a pipe cannot be taken back, so the final text is what you get. Status lines still go to stderr as the task progresses, and --json still emits every event live.