As someone mostly outside of the vibe coding stuff, I can see the benefit in having both the model and the author information.

Model information for traceability and possibly future analysis/statistics, and author to know who is taking responsibility for the changes (and, thus, has deeply reviewed and understood them).

As long as those two information are present in the commit, I guess which commit field should hold which information is for the project to standardise. (but it should be normalised within a project, otherwise the "traceability/statistics" part cannot be applied reliably).