Ran across this podcast at random. Guy had an interesting idea about merging Codex with Pathfinder. Codex stuff starts at 08:00
https://player.fm/series/live-from-pellams-wasteland/ep-2140-games-and-ecology
I have been urged in the past to make a ‘Pathfinder version’ of Codex, but I was unable to determine if they have a system for third party content and how easy it is to deal with, and / or what kind of financial or legal arrangements are involved. I went on their forum and asked about it but never got any answer.
By the way, Codex is probably ideal for running a Samurai RPG game.