If you're looking to help with Arcalibre development, it's now a bit easier to do so! The rereading/pyreading repo on Codeberg builds two Python packages that are used by Arcalibre, but that can be developed, built, and tested separately from any other Arcalibre code.
They're both Maturin-based, using Python to wrap some Rust logic so that it can be used with only glibc as a runtime dependency.