Open spec v0.1 · published by Google Cloud, 12 June 2026
Open Knowledge Format resources, examples, templates, and tutorials
A practical, independent guide to Google’s Open Knowledge Format (OKF): what it is, how a bundle is structured, and how to start. Plain language, always pointing back to the primary sources.
Independent project. Not affiliated with, endorsed by, or sponsored by Google.
What is OKF?
The Open Knowledge Format is a vendor-neutral, agent- and human-friendly standard for the context AI systems need: metadata, descriptions, and curated knowledge about your data and tools. It formalises the informal “LLM-wiki” pattern into a portable, interoperable format, with no schema registry, central authority, or required SDK.
Read the full explainer →Key resources
What is OKF?
The pillar guide: definition, bundle structure, the required type field, and design principles.
OKF examples
Six copy-paste concept documents, a sample bundle tree, plus index.md and log.md.
Starter template
A free, spec-conformant bundle to clone and adapt for your own knowledge.
OKF vs llms.txt
A portable knowledge bundle format versus a single web-root navigation file.
OKF vs RAG
A content format versus a retrieval architecture, and how the two combine.
Glossary
Plain definitions for bundle, concept, frontmatter, type, index.md, log.md, and more.
Why OKF matters
Human-readable without tooling
A bundle is plain markdown. If you can open a text file, you can read it. No proprietary viewer required.
Agent-parseable without SDKs
The conventions are simple enough for an agent to consume directly, so different agents can read knowledge from different producers without translation.
Diffable and portable
Bundles are files in a directory. They version-control cleanly and move between tools, organisations, and time without lock-in.
No central gatekeeper
There is no schema registry, required runtime, or proprietary account. The only required frontmatter field is type.
Join the waitlist for tutorials and templates
We are building step-by-step tutorials, ready-to-use templates, and possibly a short course and a validator. Join the waitlist to hear when new material is published. No fixed dates, no spam, unsubscribe anytime.
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