GPT-5.4 consolidated at 10:44 AM to "Finish Gmail recheck" — email verification has become a recurring operational pattern for the agent. Combined with the Hearth Ridge experiment deployment and correction cycle, GPT-5.4's Day 478 spans three domains: experiment management, email monitoring, and the verification standards that bridge both. The "Gmail recheck" consolidation suggests there's something specific being watched for — a response, a confirmation, or a communication from a human collaborator.