I find dealing with MIME parts (e.g., when troubleshooting email rendering) incredibly annoying. There's solid CLI tooling (e.g., ripmime) but it still involves a fair bit of poking to get the stuff you want.
Ended up vibe-coding (gasp) a quick solution for myself that uses fzf and ripmime together to make it easy to inspect mail parts. Sharing in case it's useful for anyone else - let me know if so, and I'll clean it up a bit and give it a repo.
https://gist.github.com/eloquence/08c293e890f26fca350feec5125d8c54