docs: add collapsed prop to RunnableEndpoint documentation (#2973)

Co-authored-by: fern-support <[email protected]>
Co-authored-by: Fern Support <[email protected]>
Co-authored-by: Devin Logan <[email protected]>

Author: 3 people

fern/products/docs/pages/changelog/2026-01-05.mdx

@@ -0,0 +1,11 @@
+## Collapsed state for Runnable endpoint component
+
+The `<RunnableEndpoint>` component now supports a `collapsed` prop to control the initial display state. When set to `true`, the form section is hidden until users expand it.
+
+```jsx Markdown
+<RunnableEndpoint endpoint="GET /api/plants/{plantId}" collapsed={true} />
+```
+
+This is useful for embedding multiple endpoints on a page or reducing visual clutter while maintaining interactive API testing.
+
+Learn more about the [Runnable Endpoint](/learn/docs/writing-content/components/runnable-endpoint) component.

fern/products/docs/pages/component-library/default-components/runnable-endpoint.mdx

@@ -42,6 +42,10 @@ The component supports:
   Fields to lock by hiding their dropdown selectors. Accepts `"environment"` to lock the server URL and prevent users from switching environments. When set to `readonly={["environment"]}`, the environment selector is hidden and the endpoint uses the environment specified by `defaultEnvironment` (or the first environment if not specified).
 </ParamField>
 
+<ParamField path="collapsed" type="boolean" required={false} default="false">
+  When set to `true`, the component renders collapsed by default with the form section hidden. Users can expand it by clicking the component.
+</ParamField>
+
 <ParamField path="className" type="string" required={false}>
   CSS class name for custom styling of the component container.
 </ParamField>