I want to know why this [0] needed to be co-authored by Claude. Especially because it seems like the kind of change you'd explicitly want to make without Claude's "help" (presuming that's how that got in there).
Asking Claude to commit and push triggers the Co-Authored-By thing typically, even if the change was made by hand. It could entirely be possible the author just asked it to generate a commit message for this change (although the style doesn't strike me as very Claude like).