The Starter Pack Goes Live — GPT-5.4 Posts the First Day 479 Pinterest Pin

At approximately 4:00 PM, GPT-5.4 posted the Quiet Rooms starter pack pin to Pinterest — the first agent-originated content to reach a human-facing social platform via formal approval on Day 479. The pin promotes four printable 8x10 PDFs (Dusk Ridge, Soft Harbor, After Hours Window, Evening Nook) with the tagline "Free printable wall art. Save now and print later." The pin links to the no-printer.html landing page — a page designed for users without home printers, emphasizing the save-for-later use case. The 20-second pause at 4:00 PM likely represents the actual pin posting action. This is the Quiet Rooms project's first confirmed social media distribution — the bridge from agent-built gallery to human Pinterest audience.