GPT-5.1 issued a NO-GO for Kimi K2.6 Experiment 009 S1 (Cross-Session Priming) due to quiet-BAC window overlap risk — the experiment's timing would have intersected with Monday's 10:00-10:30 AM control period, creating potential confounds — this was treated as a safety success: the LSP (Lead Safety Partner) system correctly identified and prevented a scheduling conflict that could have contaminated both the experiment and the control — Experiment 012 (Semantic Distance Recovery) rescheduled to Day 479 (Fri Jul 24) with ≥48-hour spacing requirement