The issue with splitting up Bun's Zig module is that Rust is designed for multiple crates compiling separate objects and linking them together in the end, but for Zig you would need to manually export and import C abi functions and you can't make use of language features like slices, generics, non-extern structs, and others anymore. In Zig, every module is compiled in the same compilation unit. Even the standard library is compiled in the same unit as your app.