Oh yeah, I forgot about that gap in the boards on top of the top plate there!
But yes, that gap at the top of the stairs is my #1 concern. I’m not even sure that’s how stairs are supposed to attach at the top. What’s supporting the weight on that end, other than a few nails?
The other is how almost none of the supports between the studs are cut to the correct length; especially on the stairs:
View attachment 8237435
Edit: The good news is, with the insane number of nails this framing crew went through, I think I can try to pass this off as a steel structure for insurance purposes!