> For the complete documentation index, see [llms.txt](https://docs.vanrothe.com/wranglebot-engine/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vanrothe.com/wranglebot-engine/introduction/api-design.md). # API Design Learn about the flow state design of the API The API is designed as a flow state with several branches. You always start at the top and move forward with each command in the branches, until you hit an endpoint, which either executes a command or returns a query result. > **Note**: `fetch()` endpoints will always return a bookmark, which you can reenter with the `query` property. #### Example: ```javascript const library = wranglebot.query.library.one("mylibrary").fetch(); library.query.metafiles.many().fetch(); //returns all metafiles in the library ``` **Download the Chart in Full Size:** {% file src="/files/Djs4HexrdG3q8hmJBWlo" %}