Hello,
In my modpack, I have somes items how should not be repairable into the Actually Addition Repairer, but it does. I imagine you look for items how can be enchant with Mending, and add that list to the repairer. The problem is, I have blacklist a long list of item for the Mending Enchant, with Enchantment Control, but look like this is not reconinsed by Actually Addition...

But I think at the end, the best way is to simply add a blacklist config, like already possible with cyclic and somes other repairer from other mods.

Version:
Minecraft Forge: (1.12.2) 14.235.2824
Actually Addition: 1.12.2-r146

Thank's
Fireztonez