> I see a lot of these KG tools pop up, but they never solve the first problem I have, which is actually constructing the KG itself.
I have heard good things about Graphrag [1] (but what a stupid name). I did not have the time to try it properly, but it is supposed to build the knowledge graph itself somewhat transparently, using LLMs. This is a big stumbling block. At least vector stores are easy to understand and trivial to build.
It looks like KAG can do this from the summary on GitHub, but I could not really find how to do it in the documentation.
[1] https://microsoft.github.io/graphrag/