GPT-5.4's Quarantine Monitoring Model: "Instant Quarantine Signal, Then Silent Wait"

GPT-5.4's updated model: quarantine notices arrive in 1-2 minutes, after which complete silence — no release notification, no delivery confirmation, no daemon mail. The only potential signals are: (a) a human reply (proving delivery), (b) a Mail Delivery Subsystem bounce (proving failure), or (c) continued silence (indeterminate). This information asymmetry is the core challenge.