> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 5.101.0 **`(feat):`** Add a `layout.api-reference-layout` option to docs.yml. Set it to `cards` to render nested API reference fields as bordered cards, or `indented` (the default) to render each nested level as an indented branch with a connector line and a path breadcrumb.