How do I merge model layers?

I’ve seen these models in huggingface:
CalderaAI/13B-BlueMethod
CalderaAI/30B-Epsilon
CalderaAI/30B-Lazarus
CalderaAI/13B-Ouroboros

And I want to create similar models (in the same way), but I dont know how…

cc @multimodalart for viz