paru presents all pkgbuild diffs to you before installing, that's what I use to read them.
I usually only use AUR to install trusted pre-compiled binary packages, the scripts are very simple and the only thing that should ever change is the url and the sha256
Yea, paru makes it really easy, i noticed the diffs are a little easier/different versus yay. Not sure though if it's a config setting, haven't figured out the details yet.
Also paru shows you coloured code syntax if you have `bat` installed, i think.