A list of systems that implement this or related ideas: https://zby.github.io/commonplace/notes/related-systems/rela...
This list is also part of my own contender in this race: https://zby.github.io/commonplace/ - my own LLM operated knowledge base (this is the html rendering of that KB - there is also the github repo linked there).
The main feature is that I use it to build a theory about such systems - and the neat trick is that llms can read this theory and implement it so the very theory works as an LLM runtime too.
It works for me - but it has some rough edges still - so I guess it is not for everyone.