Emit a blocking question the owner can read in ~10 seconds and answer in one reply — the scannable, recommendation-first handoff every agent posts when it hits a fork it can't own. Leads with the one decision + a recommendation, carries the 🤖 provenance header, doubles as the #639 resume brief. Use the moment you decide (via the AGENTS.md decide-vs-ask test) that a fork is genuinely the human's, or when asked to "ask the human", "post a blocking question", "hand this off", run /ask-human.