This is another big difference between Rust and Zig. Rust lets you have it both ways with configuration. Zig places much more value on being able to read and understand any Zig code in the wild, based only on “it compiles”. Rust’s “it compiles” gives you lots of information about safety (modulo unsafe blocks), but very little about certain other things until you’ve examined the 4-5 places which might be tweaking configuration (#[attributes], various toml files, environment variables, command line flags).