I’m pretty sure copyright office has settled that already. Inly human expression can be copyrighted:
> As described above, in many circumstances these outputs will be copyrightable in whole or in part—where AI is used as a tool, and where a human has been able
to determine the expressive elements they contain. Prompts alone, however, at this stage are unlikely to satisfy those requirements.
Using a harness to build something should clear that barrier, by the same logic that a photographer pointing on camera at something and pressing a button clears the barrier.
> As described above, in many circumstances these outputs will be copyrightable in whole or in part—where AI is used as a tool, and where a human has been able to determine the expressive elements they contain. Prompts alone, however, at this stage are unlikely to satisfy those requirements.
https://www.copyright.gov/ai/Copyright-and-Artificial-Intell...