Opt-in (default 0, unchanged behaviour). A named push can wait until the node
reports it applied exactly this declaration, so an interactive push means "the
node is now what it was told". Not made the default: a push that recreates the
control plane would kill the waiting command running inside it.
Claude-Session: https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx