Perhaps Webmemex is what you are looking for? https://blog.webmemex.org/ https://blog.webmemex.org/ More specifically freeze-dry, code for page state saving:

Perhaps Webmemex is what you are looking for? https://blog.webmemex.org/ https://blog.webmemex.org/ More specifically freeze-dry, code for page state saving: https://github.com/WebMemex/freeze-dry https://github.com/WebMemex/freeze-dry