As the person designing and implementing cargo script integration into cargo (there have been many third-party implementations in the past), I was both glad to

As the person designing and implementing cargo script integration into cargo (there have been many third-party implementations in the past), I was both glad to see it in the wild and surprised and glad to see it called out like this! Docs are at https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#script https://doc.rust-lang.org/nightly/cargo/reference/unstable.h... Yes, there has been a long road to this in defining what this should look like, how it should interact with the language, what is the right scope for the initial release, and so on. At this point, I'm doing what I hope is the wrap up work, including updating the style guide and the Rust reference. The big remaining work is in details I'm working out still for rustfmt and rust-analyzer. Other than those, I need to get to a bug fix in rustc and improve error reporting in Cargo. For myself, I use cargo script nearly daily as I write a script whenever I'm creating a reproduction case for an Issue I'm interacting with.