utils/cad_utils.py

def generate_cad_model(dimensions):
    """
    Mock CAD model generation.
    Use pre-generated CAD files if FreeCAD is unavailable.
    """
    file_path = "/mnt/data/example_model.step"
    with open(file_path, 'w') as f:
        f.write(f"Mock CAD file for dimensions: {dimensions}")
    return file_path