Pathfinder 1E Are the exploration rules in Kingmaker system-neutral?

[Whizbang Dustyboots]

Check ACKS, it got kingdom building baked right into the basic foundation of the system and it can be used in most RPG games I can think off with a bit of change, you should also check out their Kickstarter campaign for Domains at War, the supplemental for mass combat that also encompass building keeps and infrastructure.

You took the words right out of my mouth.