The manifesto is somehow devoid of coherent arguments. You are still personally listed as the author of your commits, adding a co-author is not a mechanism for moving all accountability to that co-author. That's not what a co-author is.
I suspect the author of the website forgot to include in their prompt why they actually dislike AI Co-Author attributions. Or maybe they just have really bad colleagues
And that's while there are plenty of good reasons not to list the AI as co-author. I stopped letting Claude include it