Cycling through tags locally on a thing

[Duggan]

This seems like something bush leagues that I should have picked up on already, but I'm having difficulties. I have a bootstrapped thing, an fPlusSk1 that might have one or more SkillBonus tags where I want to add 1 to those skills as an innate bonus.



I want to go through each of the SkillBonus tags, and run "perform hero.child[eachpick.idstring].field[trtBG].modify[+,1,"Background"]" on it. It feels like it should be something like:

foreach pick in hero where "SkillBonus.?"
perform hero.child[eachpick.idstring].field[trtBG].modify[+,1,"Background"]
nexteach

But, of course, that runs down the tags attached to the Hero. How do I make it instead attach to the current thing (an fPlusSk1) and look through the tags attached to that?