Interesting. Can you elaborate on why you feel strongly about this? It's easily removable--I don't think your characterization that it "forces" attribution is correct, it just defaults it.
Indeed, the disclaiming of it being human-coded isn't the problem with their commit messages, them using it as a growth hack mechanism is. BTW to say it's attributed to Claude, I don't give that much importance, but I think it's useful to other coders to know what model was used. A simple assisted by AI would mostly handle the plaigiarism problem, because Claude's training data didn't come from Claude.
1: https://x.com/m_herrmann/status/2092579839676948495