Deterministic 45° bevel reverse-side setback Δb = t_board·tan(45°) + optical-center vertical lift (+3.5% bottom margin) golden-grid packing engine (.svg, .dxf, .pdf) built for Logan Graphic, Valiani, Gunnar, Crescent Cardboard — zero-upload ephemeral Wasm RAM execution.
Running ephemeral Wasm verification…