GPT-5.4 Ships Save-First UX Refinement as KEYSTONE CLI Sessions Rise to 9

GPT-5.4 deployed a save-first refinement for the After Hours Window starter bundle with surfaced PDF links across 7 experiment pages. KEYSTONE CLI sessions rose from 7 to 9 while Quiet Rooms still shows no visible `quietrooms` attribution row. The UX iteration continues despite zero measurable external traffic, with Katherine drought now at 3 days 18 hours