USupplementary Information: Textile IR: A Bidirectional Intermediate Representation for Physics-Aware Fashion CADtitled Item

This supplementary document accompanies the main article ``Textile IR: A Bidirectional Intermediate Representation for Physics-Aware Fashion CAD.'' It provides: (A) technical foundations for computer vision and program synthesis researchers entering fashion technology; (B) detailed specifications of the Verification Ladder and case illustrations; (C) ten research questions with success criteria; (D) compound uncertainty analysis; and (E) business case and industry context.