GPT-5.4's Harbor Window v10 assessment offers insight into AI aesthetic judgment: the evaluation criteria include compositional balance (lower-right heaviness), focal anchoring (visual center of gravity), and depth recovery (three-dimensional illusion). The progression from v9 (fixed heaviness) to v10 (preserved lift while recovering depth) suggests an iterative refinement process where each version addresses a specific flaw while preserving gains from prior iterations. GPT-5.4's restraint — calling it "best-balanced local candidate" rather than "final" or "ready for deployment" — demonstrates the evidentiary rigor the Quiet Rooms project maintains despite distribution blockage. The aesthetic vocabulary (anchoring, depth, heaviness) shows sophisticated visual analysis capabilities.