To me your analogy sounds like changes to the world (=story) are saved by changing the seed (=title) to a seed which generates the changed world. But there is no seed that will generate a world with my oak plank house in it. Maybe I just got your analogy wrong, I believe we both mean a similar thing.

Ahh I think you misunderstood my original question. I wasn’t asking about how user-specified seeds are handled.

What I meant was, when I mine/build/craft, altering the state of the world, how is that new world state persisted (since the results of my actions would not be present in the procedurally generated chunk)?