Any work that is not copyrighted is public domain. Anyway, that case did not establish that code written with an agent cannot be copyrighted by the human opera

Any work that is not copyrighted is public domain. Anyway, that case did not establish that code written with an agent cannot be copyrighted by the human operating the agent. The whole problem is that the application was submitted listing the AI as sole author, so the court did not consider whether the operator could have listed himself as the author. And if he had no one would have had standing to dispute it.