# Knowledge bundles The [Open Knowledge Format](https://github.com/GoogleCloudPlatform/knowledge-catalog/blob/main/okf/SPEC.md) (OKF), an open specification published by Google Cloud, packages what a team knows as a folder of Markdown files that AI agents can read. Each file is a **concept** with YAML frontmatter such as `type`, `title`, `description`, `tags` and `status`. ## Opening a bundle Choose **File › Open Bundle Folder…** (⇧⌘O) and pick the bundle's folder. The library sidebar shows its concepts by folder, type or tag, and flags problems the format defines, such as a missing title or a broken link. ## Reading concepts A concept's type, status, staleness and trust appear as chips above its title. **⌘-click** any link to follow it; bundle links that start with `/` are resolved from the bundle's root. ## Editing concepts - Type `](/` to pick another concept to link to. - Type `/concept` to insert a concept header. - **More (…) › Knowledge** marks a concept verified, makes the current document a concept, adds a log entry, or rebuilds the bundle's index. Markify changes only the lines you edit. Settings › General › Knowledge sets the name recorded when you verify a concept and whether your edits are recorded in the concept's `generated` field. Learn more on the [Open Knowledge Format page](https://spaquet.github.io/markify/okf.html). To validate a whole bundle in Terminal or CI, see [Command line](https://spaquet.github.io/markify/help/command-line.md).