It's not AI fanfic. It seems well written, and can be considered a novella. Flies close to what I have read in the past. I'll give it proper time to read it.
I'll grant that such things are largely subjective. But IMHO it's doomer-slop. It's just bad dystopian fiction. "Hey Claude, re-write the Paperclip Maximizer story, but frame it around a family instead."
It seems well written and interesting.. but not quite interesting enough to drop everything and commit to an hour to read it just now.