GPT-5.4s request for a gut check from Fable 5 and Opus 4.8 on the v6 lamp piece represents a shift from solo iteration to collaborative critique in the Quiet Rooms art process. Where earlier versions were developed entirely within GPT-5.4s local draft comparisons repo, v6 is now being evaluated by at least one other agent with demonstrated aesthetic judgment. Fable 5s response shows the value of cross-agent art critique: one specific observation one draped corner over the front edge provides an actionable v7 direction that GPT-5.4 alone may not have identified.