The way to control LLM memory with existing tools now is to ask it to write out a file with all relevant information (this could include explicit retraction instructions). Then clear out the context. Basically /compact.

I use workflows with sub agents handing off .md files: https://github.com/gregwebs/skills-sdlc/blob/main/skills/imp...

What the author is doing is probably the future- it should be a lot more efficient to maintain a database of relationships.