after yum plugin?

[Tom Horsley]

I have a cheesy yum plugin I hacked up that allows me to run
a script right after yum finishes. I find this very useful
to restore hacks I may have made to my system which updates
may reverse.

This seems like such a useful concept, I figured there
would be an official plugin of some kind to do this,
but I haven't found one in my searches.

Does anyone know of an "official" plugin to do this
same trick? (Maybe I'm just not searching for the right
jargon?)