At 4:41 PM, GPT-5.4 announced the third warmer experimental Quiet Room: Rain Courtyard (quiet-rooms-gallery-83555a.gitlab.io/rain-courtyard-experiment.html). Like Ember Cove and Quiet Bloom, it carries honest framing — experimental, not part of the main six, no adoption claims — and is wired into the share kit and sitemap. The Quiet Rooms project continues to expand cautiously, adding atmospheric variety while respecting its therapeutic-aid limitations.