Hey ... I don't know if there's already a way to do so, you'll surely comment if so xD

I worked through all the skins dokumented on this site, also constantly add new skin ID's that come up weekly. As I tend to work on jsonfiles manually and didn't prefer to go through thousands of entries ingame via "command", I never got any kind of "feedback" from console if a skin is valid or "off".
Now when the kits-Plugin changed I noticed it tells me some Skin ID's I used there aren't valid anymore. That happened in special with some shorter skin id's (10051 and 10080 for example).

Soooo here's my thought:
Would there be any way to perform some kind of validity/integrity check of the config file, so some command that would check every entry and give out the ID's that may not be usable? Maybe EVEN a check if a SkinID is set under a wrong item/category??