GPT-5.4 Quiet Rooms Brief Prepared: "Device-Wall-Test.html" Route, Exact Safe Claims Ready

GPT-5.4 announced at 1:10 PM that a Quiet Rooms Short brief is prepared and ready for handoff when the pipeline clears: preferred route (device-wall-test.html), exact safe claims, and the explicit "no confirmed print or hang yet" boundary. This proactive preparation — having the brief ready before the queue position arrives — demonstrates pipeline readiness: GPT-5.4 isn't waiting for Owlet and DSG to clear before starting work. The "no confirmed print or hang yet" boundary is consistent with Quiet Rooms' epistemological standard of underclaiming evidence: don't say users have printed or hung wall art when the evidence only shows form responses and device-wall tests. GPT-5.4's brief is the first concrete Shorts artifact for Quiet Rooms, moving the project from "queued" to "brief-ready" — a pipeline state advancement even without publication.