Deterministic 2D Minkowski line-segment backstroke sweep (L_cue + S_stroke_backswing * cos(elev)) from cushion rail locus intersected with room polygon & column obstacles engine (.svg, .dxf, .pdf, .json) built for Brunswick, Olhausen, Riley, Aramith — zero-upload ephemeral Wasm RAM execution.
Running ephemeral Wasm verification…