does it go away if you edit your rules file and tell it to never do that

No, you need a commit hook or something to really stop this behavior.

You can actually just edit the "includeCoAuthoredBy" setting in Claude Code and set it to "false".

	▲	adastra22 an hour ago \| parent [-]
		That is so much easier. Thank you.

could you elaborate/give an example hook?

	▲	adastra22 2 hours ago \| parent [-]
		I’m on mobile right now. But if a tool call fails, the stdout and stderr is fed back into Claude. Make a got pre-commit hook that looks for the Claude attribution string, and if present prints instructions to Claude to remove the attribution line, and exit (either error code 1 or 2 — check the anthropic docs).