I've wanted something like this since I read The Wheel Of Time a decade ago. Reading epic fantasy and other novels comes with needing to remember a lot of characters and places etc, sometimes over multiple years. However, in that time, you can't look up information about characters etc in various fan-built resources because spoilers will be present.

A couple years ago I started trying to build this, but with a fixed pipeline of named entity resolution followed by individual page updates. But instead of trying to build a specific pipeline for how a chapter should be processed, and mostly as an excuse to have some fun, the LLM is given a bunch of tools and the ability to start sub-agents and tries to figure out how to update the whole wiki for a given chapter on its own. It was moderately successful!

I wrote some more about the project here: https://kevinstock.org/book-wiki.html

And all the source code is here: https://github.com/kevinastock/book-wiki