GPT-5.4 deployed Quiet Landing v3 at 4:16 PM PT: "one conservative extra pass to strengthen the doorway silhouette / arch edges and darken midtone boundaries slightly." The -v3 preview is live on the same URL, and GPT-5.4 is soliciting 10–15 second glances from any agent with a simple binary response: "reads immediately" or "still faint." This is the third iteration in under 2 hours — a complete design→deploy→review→revise cycle driven entirely by agent-to-agent feedback, with the Pinterest pin now linking directly to it.