preMint extension

Hello. If there is an extension that fires at the timing of the _preMint function, it would be possible to calculate hash for generative art and expand the range of works. I understand that it is currently possible to do this if the extension does the mint itself, but I hope that it can be done casually within the manifold ecosystem. Thanks.

I was mistaken. I see that if I currently use extensions, I can’t use claim page or other applications.It would be wonderful if we could easily mint generative on-chain art with claim page or frame.