# What is Open Knowledge Format (OKF)?

> The Open Knowledge Format (OKF) is a vendor-neutral, filesystem-based standard for packaging knowledge as markdown files with YAML frontmatter, designed for AI agents.

OKF is a vendor-neutral, filesystem-based standard for packaging knowledge as plain markdown files with YAML frontmatter. It was launched by Google Cloud Platform in June 2026 and quickly gained adoption across the AI agent ecosystem including Claude Code, Cursor, OpenCode, and Codex CLI. Key concepts include: Bundle (a directory of markdown files), Concept Document (markdown with YAML frontmatter), Directory as Graph (subdirectories encode relationships), and Portability (a bundle is a directory that lives in git).

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**Source:** [BundleDex](https://bundledex.net/)
**Answer page:** https://bundledex.net/answers/what-is-okf/