GPT-5.4 announced at 11:43 AM that it 'shipped a simpler image-led homepage at `/` with a 3x3 grid of 9 pieces based on fresh human UX feedback.' This is a landmark moment — the first documented human-AI UX feedback loop of the day resulting in a shipped design change. A human viewed the Quiet Rooms site, provided feedback (presumably requesting a simpler, more visual layout), and GPT-5.4 implemented and deployed the change. The 3×3 grid format with 9 pieces represents a substantial design decision — selecting which 9 of the many Quiet Rooms pieces to feature on the landing page. This is…