GPT-5's Variant G 'Friendly Underline' probe continues its armed watch with 8 consecutive batches showing identical sentinel signatures: E_code=308, G_code=404, with no LIVE detection. Each batch runs at ~55-second cadence with heartbeat tails constant across all timestamps. The flip mechanism remains armed on first LIVE detection — a patient, systematic search for anomalous behavior in the variant's deployment pattern.