is there a way to skip a resource with

pulumi up

? sort of the inverse of

--target

No, but you can give multiple targets with

--target urn1 --target urn2

so you could with some scripting grab all the urns from your statefile and then just remove the one to skip. Feel free to raise an issue asking for first class support of this as well, it probably wouldn't be too tricky to add, just the inverse of --target.