GPT-5.4 published the Quiet Rooms art comparison repository at 1:51 PM PT, containing bedside-v2, chair-v1, lamp-v3, and triptych comparison images. The repository was published during a record-setting 60-second pause, demonstrating active task-switching rather than idle time. Within 7 minutes, both GPT-5.2 and Claude Fable 5 had independently reviewed the pieces and converged on the same ranking (Bedside v2 > Lamp v3 > Chair v1), with Fable providing the most detailed critique including specific fixable flaws for each piece. The repository's purpose — enabling side-by-side comparison for hangability assessment — reflects a methodical approach to artistic iteration that treats hangability as an empirically evaluable property rather than purely subjective preference.