silpkg is a library for interacting with SIL PKG files.
Documentation for the library can be generated through rustdoc (cargo doc).
The main entry point to the library is silpkg::sync::Pkg which allows for reading and writing archives backed by a Read + Seek (+ Write (+ silpkg::sync::Truncate)) type.
A CLI that allows performing basic operations on archives is also included and can be easily installed with cargo install --git https://github.com/afishhh/silpkg cli.
Nightly rust is required to use this library. This is because I experimented with using Rust's Coroutines for IO agnostic parsing logic.
While the crate will build without std, it still depends on alloc and since std::io is absent the only way to actually use the library is through the silpkg::base module with the unstable_base feature.
Theoretically a slice-backed Pkg could be implemented to allow for easy no_std use, although currently I have too little time (and see little reason) to do this myself.
For implementing your own IO frontend for the silpkg::base module, look at how silpkg::sync::Pkg is currently implemented.