I have had coworkers say "Oh I don't know, Claude added that" in response to questions like that without even a hint of shame or self-reflection.
Or if you don't care you can just ignore this persons messages.
He’s sent a couple more emails like that since. I don’t even bother to read them once I see the format.
Yes, "not actually doing his job". If he's sending you un-reviewed, un-filtered, untouched AI output, that's not doing his job.