The Tweet That Changed How I Think About AI + Knowledge

In early April 2026, Andrej Karpathy (OpenAI co-founder, former Tesla AI Director) posted something deceptively simple:

"Something I'm finding very useful recently: using LLMs to build personal knowledge bases for various topics of research interest."

He followed it up with a GitHub gist titled LLM Wiki an "idea file" describing a pattern for building knowledge bases that actually compound over time instead of rediscovering the same information on every query.

I decided to build it for a real production problem.

The Problem: RAG Has No Memory

In My organization, we were running an SEO monitoring pipeline for our landing site. It used Cognee (a knowledge graph framework) backed by Neo4j + ChromaDB on a $35/month VM.

Every day it would:

Pull Google Search Console data

Scrape our pages for SEO issues

Query the knowledge graph

Post a Slack report

It worked.…