Broke my streak, wrote a blog post about LLM usage.

Claude is Not Your Co-Author.
https://sirosen.net/2026/03/01/claude-is-not-your-coauthor.html

Although motivated by writing a policy, this post about what I really think, as an entirely separate matter from what I think project policies should look like.

Stephen Rosen

@sirosen

> It really seems like Claude is the only tool which appears in commits like this, presently. I’m sure other vendors will start doing it too.

Not AI tools, but Dependabot and pre-commit CI also use Co-authored-by.

https://mastodon.social/@hugovk/116141489610561083

@hugovk
Oh, good point!

I'd forgotten because the vibe of those tools is so different. It never bothered me in that context. Nobody mistakes dependabot for a person.

I'll think about revising the post... My feeling that this is still a bit of marketing isn't much changed though.

@hugovk I added an addendum to acknowledge that usage, without getting too deep into why it feels different to me.

Thanks for calling this out!

@sirosen You're welcome! Co-Authored-By is also added when you accept suggestions via the GitHub PR UI, which is what happened in that CPython commit. Now I'm wondering what happens when accepting suggestions from Copilot...