My last piece on Google’s Open Knowledge Format (OKF) was one of the most popular I’ve ever published. Since then, I have been heads down working on my own OKF structure. I’ve essentially built my own personal brain, and today, I want to show you how it works and why this standard is so incredibly important for the shift toward an agentic web.
The beauty of OKF is that it follows a very simple, standardized structure. While many people have pointed out that markdown files are nothing new, what Google has done is create a standard. This means if I give an agent my OKF files, it knows exactly how to read them without needing custom software. It is a universal language for AI agents.
Watch the video of me showing my OKF brain:
Understanding The YAML Frontmatter, Index, And Markdown Files
Every OKF file starts with what is called YAML frontmatter. This is a small block of metadata at the top of your markdown file that tells an agent exactly what it’s looking at. In my personal brain, I use specific types for everything. I have concepts, entities, playbooks, references, and systems.
Here is what my folder structure looks like for my OKF brain:
And here is the markdown code for one of the concepts in my brain:
When an agent views my OKF, it first views the index file. This index.md file is essentially an index of the different areas the agent can access in my brain. This way, instead of my agent having to do RAG across everything in my knowledge base, it can focus specifically on the areas that are relevant.
The system I built also works to connect related concepts. When it ingests a new piece of content, whether it’s a blog post I’ve written, a Google announcement, or a piece of research, it finds what other concepts we have created that should be connected. The result is a really cool graph of all of the knowledge we have in the brain. This idea of agents extracting concepts and making connections comes from Andrej Karpathy’s LLM Wiki idea.
Visualizing Your Knowledge Graph
When you use OKF correctly, you can visualize your brain as a connected graph. Every dot in my system is a markdown file. You can see how my concepts for AI Overviews connect to my references from Google’s documentation and my internal playbooks. It’s a living, breathing map of everything I know about SEO and AI.
I’m also automating how I ingest information. I have a system that checks Google’s documentation daily. If they update something, like the documentation on AI Answers or Search Console features, my brain notifies me and automatically updates the relevant reference files. I don’t have to rely on my biological hardware to remember every small change anymore. My OKF brain has access to far more than I could ever keep in my head at once.
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