When moving a large number of similar items to a new item group, it can be a bit overwhelming. It would be nice if item tags were supported to make this a bit easier.

The changes in this mod are applied during startup, when no tags are available. Therefore, supporting tags is impossible.
However, you can use regex (regular expressions). Google is better at explaining the details than I am, but it essentially boils down to doing things like .*_planks to modify all planks at once.

I didn't realize this mod supported regex, thanks!