100% of AI use should have to be disclosed in all cases, not just software. A person using an AI is foregoing responsibility from the get go by using an AI to do things that they can't personally do. What would it even mean for them to be responsible if they submit a patch to a project written by an AI as their own work? Such a person submitting a patch they don't understand that is rejected is in exactly the same place as if they had never submitted a patch. They have nothing to lose.