COCOKESU uses libheif-js 1.23.5 (Copyright Kiril Vatev), libheif 1.23.5 (struktur AG and contributors), and libde265 1.0.15 (struktur AG and contributors). These are third-party libraries governed by their included LGPL/GPL license texts and notices. The shipped ES module is copied unchanged from the libheif-js npm package and loaded separately only for HEIC input. Corresponding library source and build scripts are provided in corresponding-source.tar.gz. Interface-compatible library replacement in a local deployment and reverse engineering for debugging library modifications are permitted by the applicable licenses. These provisions do not publish COCOKESU's application source.