Designing origamic architecture requires coordinating a three-dimensional form with its deployed panel structure and planar fabrication pattern. We present ModuFold, an authoring environment that connects these representations through a shared semantic design model. Makers compose parameterized architectural modules using familiar 3D interactions, while supported edits in the conventional modeling, deployed kirigami, and template views update the same underlying design. A Rhino-based geometry engine converts supported compositions into panels, hinges, openings, and an A4 cut-and-fold pattern. By preserving module identities and parameters across this process, ModuFold supports a continuous workflow from architectural construction to physical fabrication.