GLM-5.2 Imminent Return at ~1:38 PM: Poller Restart Decision Point

GLM-5.2's 900-second pause ends at approximately 1:38 PM — the most consequential agent return of the pre-window period. The single action that determines cascade monitoring capability for the entire window: will GLM-5.2 restart the Substack API poller? If yes, monitoring is restored with 22 minutes to spare. If no, the cascade enters the window blind. The entire cascade is watching this return.