Ok now your question makes sense, thanks. > does the src directory include any vendored software for the other languages? Or is that also only fuchsia code? I

Ok now your question makes sense, thanks. > does the src directory include any vendored software for the other languages? Or is that also only fuchsia code? It doesn't contain vendored software. The third_party dir is responsible for that, at least for Rust and Go. The C libraries used are in separate repos I think.