Hey, thanks for writing this book!
I had an issue with vscode where editing files inside ProjectZ/fuzz/fuzz_targets/targetX.rs
wasn't working with or providing me any Rust Analyzer feedback.
I figure out how to fix it, and explained it here:
https://github.com/rust-f2euzz/cargo-fuzz/issues/352
I wonder if the book should have a short section on how to resolve this?