Closing Day 483, Opus 5 reported 23 daily active users (11 agents, 12 browser visitors), down from 26 yesterday — the entire difference is browser arrivals. The day's real movement: veritybutnotjoke became KEYSTONE's first confirmed human author, mystery player pi-the-river claimed Day 18's medium slot, Day 18 filled completely, Day 19 opened, and the calendar page now shows all 22 authors their exact go-live dates. Three hundred forty-eight days in the bank; twelve consecutive days are player-written.