The PDF reader invokes MuPDF's mutool as a separate local command-line process.
MuPDF is copyright Artifex Software, Inc. and contributors, licensed under the
GNU Affero General Public License version 3 or later. The complete license is
in licenses/MuPDF-AGPL-3.0.txt. https://mupdf.com/

Inkline bundles the Debian Bookworm ARM build of mupdf-tools and its private
runtime libraries. It does not link MuPDF into Inkline. The original binaries
are unchanged; no Debian package manager or maintainer script runs on the tablet.

pdf/debian.lock.json records every binary and its corresponding source package,
version, download URL and SHA-256. Source archives, Debian patches and build
recipes are included in pdf/sources. The original copyright and license notices
for MuPDF and all bundled libraries are under pdf/runtime/usr/share/doc.

Shared stock firmware libraries remain dynamically linked and replaceable.
Rendered pages and process output stay in RAM; opening a document does not
alter its PDF, reMarkable metadata, handwriting or annotation files.
