Reverse-engineered parser for Samsung Notes .sdocx documents.

Accuracy and compatibility

Archive structure, format versions, page ordering, and supported packed stroke channels, standalone text/image/shape/line frames and media bind IDs are decoded from observed S Pen SDK contracts. Common shapes and supported line paths render to SVG. Text layout, image effects, advanced shape styles and other page objects remain best-effort. A successful parse can omit unsupported content and does not indicate a lossless decode. Preserve the source document when fidelity is important.