CymChad/BaseRecyclerViewAdapterHelper ? reverse-engineered prompt

Build me an Android RecyclerView helper library like BRVAH, with a simple demo app so I can see how it works.

I want something that makes RecyclerView adapters easier to write, especially for lists with multiple item types, load more, and basic item animations. It should feel clean and flexible, and work well with modern Android setups, including ConcatAdapter support. Please include a small sample screen showing a few different list layouts and how to plug the adapter in.

Make it easy to reuse in another app, and include whatever setup or defaults are needed so it works out of the box. If you need to check current Android docs or best practices while building it, go ahead and look them up online.