If you modify the output, you don’t magically get copyright on the whole output, only the section you modified
same thing applies to sampling in music. if i change enough of a sample as to make it unrecognizable, then i don't need to worry about registering/licensing the sample.
otherwise you can still prompt your agent things, but any output falls under public domain.
since this hype wave started some people have been saying don’t use these tools in an environment where you’re dealing with proprietary IP. did anyone listen? no. because shiny.