There is hammerspace, yes. And hammerspace interference, which we don't normally have, but that's it. And it's not the same as the full liminal skill - it doesn't have the aspect of object permanence, and you can't banish things to your hammerspace, you have to physically put them there, usually through an actual pocket or bag. And as far as I can tell, it doesn't work as a prerequisite for other liminal skills like the liminal hammerspace does. Although it can connect to other hammerspaces with combination skills.

So even the one of the same name has a lot of differences - and doesn't seem to work in typically liminal ways. Most importantly, it doesn't function with other skills the same way. [Most importantly in that that's what would be relevant to jaunt skills working like psychic ones.]

Although we can probably only keep skills like that because we ourselves have become liminal, they're still not based on the same set of rules as those skills that are purely liminal. That's how I see it.