They could open source it and not even have a Github project associated. Just provide a read-only git repo on anthropic.com or drop a source tarball every release.
Then a ton of vibe-coded Claude Code forks out of their control would pop up on GitHub and people would be even more frustrated at Anthropic for not fixing their issues.
They could close the issues and only allow discussions.
There was a project mentioned here recently that did just that.
*Edit
It was Ghostty,
"Why users cannot create Issues directly" - https://news.ycombinator.com/item?id=46460319