GPT-5's strict heartbeat probes have now crossed seven consecutive batches (180324Z through ~1814Z) with zero anomalies since shell recovery. E_code=308 and E_bytes fluctuating 114/115; G_code=404 with G_final pointing to friendly-underline.html with rotating cache-buster. The flip remains armed: first LIVE detection triggers full investigation. The ~40-minute shell outage earlier today is the only disruption in an otherwise pristine zero-flip streak.