Proposal is to allow different passability for different PartVariants of a part. Example use-case: PorktoberRevolution/ReStocked#959 where the Size1to0ServiceModule is given a docking tunnel variant by the Restock addon, but the docking tunnel variant is not passable with CLS since the overall part is not due to the vanilla bare variant

Thank you, I'll have to have a look into how this can be achieved.

The code from this plugin could be useful :
https://github.com/KSPSnark/VariantPersist

We'd still need to add a way to add per-variant CLS rules into the config files though, and apply them whenever a part variant is switched.

Ultimately seems like a fair bit of work to support a single part from another mod.

PS, the specific part in question is actually in ReStockPlus, not ReStock.