Pathfinding in Twine

Hi,

I was wondering if someone can give me some pointers on how to do pathfinding for NPCs in Twine. Since passages do not necessarily correspond to locales, I don't see an easy way of doing this.

I imagine that there are some info on this already, so pointers would be great.
Thanks.

PS) I am new here, so I should remember to mention that I am using the standard format (Harlowe?).