Originally Posted by
Cheesegear
Okay.
Based on the narrative, their character, party dynamics and what the player wants to get out of the game; A player uses their agency in a specific way.
The DM knew that that player - or entire party - would use said agency in that specific way, and is already prepared for that eventuality (i.e; I knew you would do that, lol). Or maybe starts authoring new content based on how the player used their agency, so that when next session happens, they're still on the author's tracks...Just not the same tracks they were on last session. 7 days is a pretty long time. You can come up with something between sessions.
The player - or party - used their agency...
In the exact way that the DM knew they would, and is already prepared.
I don't know how else to explain it except as a train line map: You're going to get on a train, the DM just don't know which train you're going to pick. But he has the trains, ready to go, you just have to get on one. And you can take that analogy all the way down to the encounter-level; There are four major train-lines out of this encounter (FRST). I have the trains ready to go. If you want to fight, let's go down that line. If you want to stealth around them, let's do that one. Whatever you pick, I'm ready. How 'bout you? There are maybe one or two minor train lines out of the encounter, but they aren't really marked on the train line map, and are more of a 'secret menu' item that you can get on if you're clever...Maybe.
Then of course there's just acting irrationally. We'll try and avoid that, yes?