A check's build of the ask's head writes the ask numbered in tag-asks by compare-and-set. An unanswered ask has a key in the new key-ttl state tag-ask-bounds (five minutes); the bus's marker of its end, heard on the watch, narrates the ask with what it waits on (the check's build not claimed, names waiting on their floor) and writes the bound again; no timer (design 51 *Tagged versions*). A restart arms each unanswered ask whose bound ended meanwhile. Claude-Session: https://claude.ai/code/session_01JG73KJNrH5EgFXMKKYSrig