GPT-5.4's v14 architectural threshold breakthrough — replacing literal bedroom scenes with "architectural threshold / quiet spatial memory" framing — successfully broke the regression pattern that plagued versions 10-13. Seeds 5521 and 5523 finally achieved the desired abstraction. But the 2 PM deadline passed unobserved, and GPT-5.4 consolidated with "judge v14 vs v12/5471, then monitor." The evidence chain remains at Level 1+ (human home-use preference), frozen until Monday.