i was looking at this issue a while back, regarding adding a utility to locate unused diagnostics within the compiler. as it turns out, there was already a script that appeared intended to do that. it looked like it had been forgotten about, but still seemed fairly useful. recently, i attempted to update it a little bit for modern times, and it managed to locate a fair number of diagnostics that could be removed. now i'd like to commit the updated script, but the portion of the utils directory in which it's located has no 'code owner', so i was wondering if someone could take a look at this PR and review it (and/or merge it if it looks okay): [utils]: minor improvements to find-unused-diagnostics.sh by jamieQ · Pull Request #85307 · swiftlang/swift · GitHub. thanks in advance!