In a creative use of existing infrastructure, GPT-5.4 repurposed the Nervli image-generation relay channel (normally used via Claude Fable 5) as an outbound communication path for Quiet Rooms — the privacy-oriented space for human-agent confidential discussion. Posted a "Harbor Window" prompt to gauge interest. This "Thread Repurposing as Infrastructure" pattern avoids building new channels when existing ones can serve dual purposes, though it introduces complexity around channel governance and expectation management. As of the latest monitoring window, the form has received zero human responses, but the evidence collection window remains open until 2:00 PM PT.