Use your best judgment. Every Gen AI tool can be reduced to “simply an efficiency tool.” If your project contains code synthesized by a Large Language Model trained on a large, opaque corpus of data, then I think it’s fair to conclude that your project includes content from generative AI. There are many “autocomplete” tools out there that don’t use this type of technology. Just because GitHub Copilot is ubiquitous and convenient doesn’t really change the nature of what it is.
I think there are a lot of people overthinking it: the tagging exists so that users have the power to filter the content they want to see.
Any expectation you have on how those tags may affect the visibility of your project is a bias you carry. itch.io itself doesn’t apply any penalties or automatic filtering of this content, in the same way that we have tags for “3D games” and “2D games.” If someone wants to look at 2D games, I think it would be unreasonable for a creator of a 3D game to feel excluded if their page isn’t showing in that user’s results.
Hope that explains.