A and B rebuilt with a background-only treatment through the subject mask — no rectangles, no outlines. C now ships as a real 4:5 + 9:16 native pair.
9:16 for A, B and D is blocked. Only 4:5 plates exist for those three scenes, and the production lock forbids deriving one ratio from the other. Generating native 9:16 plates needs the provider route, which is not on this Linux box: with-webbuildr-api and the imagegen path in raw-static-provider.sh are both macOS paths, and OPENAI_API_KEY is unset. The Linux imagegen CLI does exist — the wrapper needs a Linux counterpart before I can generate a plate. Not worked around.