The sharp-libvips native distribution identifies its combined library under LGPL-3.0. The accompanying COPYING.LGPLv3.txt and COPYING.GPLv3.txt provide those full terms. Individual components retain their original licenses listed in SHARP-LIBVIPS-NOTICES.md and SOURCES.md. LIBVIPS-LICENSE.txt contains the upstream libvips LGPL-2.1 terms. These companion notices apply to both startupOS preview downloads.
