Not necessarily. The referenced guidance [0] says: "...copyright will only protect the human-authored aspects of the work, which are 'independent of' and do 'not affect' the copyright status of the AI-generated material itself." If you read the paragraph or two above that one, it really seems like products of agentic coding cannot be copyrighted, as there wouldn't be significant authorship involved.

[0]: https://www.federalregister.gov/d/2023-05321/page-16193