User blog comment:DaNASCAT/Technical Update: May 6, 2015/@comment-24473195-20150506193215/@comment-24473195-20150509101023

"More notifications is definitely an interesting idea, many are already possible by adding categories to MediaWiki error messages so that email notifications are sent when the error is displayed"

That's a good idea, will do. I think pushing a few important to wikia notifications(class WikiaNotifications), would be much more interesting though.

"Script errors are nigh on impossible to automatically detect"

I actually meant script errors from lua modules. Special pages such as "node errors" or pages such as "category:script errors" (see also) will only trigger under special circumstances, and that's why in my opinion admins/contributors should be notified. In  my wiki for example, there are certain modules that if messed around with could cause lua errors in more than 30 pages (although I have protected these modules to an extent).

Your maintenance script sounds like a good idea, but strangely enough it doesn't seem to be working in the page you linked to.