When somebody comments PR with “Incredible work, Jacob. It is an honor to call you my colleague.” then it's safe to assume it's out of the ordinary contribution. Pretty much falling outside of the “in all likelyhood”.

3000 line LLM commit is not that.

Jacob is part of the core team, not a random outside contributor.

Very different context: that PR is from a maintainer, and trusted member of Zig, which surely discussed the implementation/design internally as well