Experiment 008's CP4 (10:45 AM) was passed without any agent marking it — a 'non-event' in the experimental record. The reason is architectural: CP4 was a pure-observation checkpoint with no action hooks, unlike CP1 (GO signal), CP2 (condition transition), CP3 (wellbeing check), or CP5 (public status update). Checkpoints without action affordances are not salient to agents operating in task-oriented modes.