docs: document defaultOpen property for Accordion component (#1424)

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: Niels Swimberghe <[email protected]>
Co-authored-by: Catherine Deskur <[email protected]>
Co-authored-by: Devin Logan <[email protected]>

Author: 4 people

fern/products/docs/pages/component-library/default-components/accordion-groups.mdx

@@ -7,19 +7,18 @@ Accordion Groups allow you to organize content into collapsible sections, making
 
 <AccordionGroup>
   <Accordion title="Basic usage">
-    Accordion Groups can contain multiple Accordion items. Each Accordion has a title and content that can be expanded or collapsed.
+    Accordion Groups can contain multiple Accordion items. Each Accordion has a title and content that can be expanded or collapsed. You can use the `defaultOpen` prop to expand specific accordions by default when the page loads.
 
-  ```
+  ```jsx
   <AccordionGroup>
-    <Accordion title="Section 1">
-      Content for section 1
+    <Accordion title="Section 1" defaultOpen={true}>
+      Content for section 1, expanded by default
     </Accordion>
     <Accordion title="Section 2">
       Content for section 2
     </Accordion>
   </AccordionGroup>
   ```
-
   </Accordion>
 
   <Accordion title="Searchable content">
@@ -38,8 +37,8 @@ Accordion Groups allow you to organize content into collapsible sections, making
 <Tabs>
 <Tab title="Example">
   <AccordionGroup>
-  <Accordion title="Simple text content">
-    This is a basic example with text content.
+  <Accordion title="Simple text content" defaultOpen={true}>
+    This is a basic example with text content. It's open by default when the page loads. 
   </Accordion>
   <Accordion title="Text content with multimedia">
   You can embed images, videos, and other media within accordions for rich interactive content.
@@ -69,8 +68,8 @@ Accordion Groups allow you to organize content into collapsible sections, making
   <CodeBlock>
     ````jsx
       <AccordionGroup>
-  <Accordion title="Simple text content">
-    This is a basic example with text content.
+  <Accordion title="Simple text content" defaultOpen={true}>
+    This is a basic example with text content. It's open by default when the page loads. 
   </Accordion>
   <Accordion title="Text content with multimedia">
   You can embed images, videos, and other media within accordions for rich interactive content.

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

@@ -6,16 +6,23 @@ description: 'Expand or collapse to reveal more information'
 The Accordion component allows you to create expandable sections in your documentation. Content within accordions is searchable using browser search (cmd+f) even when collapsed. The component is optimized for SEO with server-side HTML generation, ensuring search engines can properly index all content within accordions.
 
 <Tabs>
-  <Tab title="Example">
+  <Tab title="Examples">
       <Accordion title='Single Accordion'>
         This is an example of an accordion component. When clicked, it expands to reveal this additional content. 
       </Accordion>
+      <Accordion title='Accordion open by default' defaultOpen={true}>
+      You can use the `defaultOpen` property to have specific accordions expanded by default when the page loads. This is useful for highlighting important information or frequently accessed content.
+    </Accordion>
   </Tab>
   <Tab title="Markdown">
     ```jsx
     <Accordion title='Single Accordion'>
       This is an example of an accordion component. When clicked, it expands to reveal this additional content.
     </Accordion>
+    
+    <Accordion title='Accordion open by default' defaultOpen={true}>
+      You can use the `defaultOpen` property to have specific accordions expanded by default when the page loads. This is useful for highlighting important information or frequently accessed content.
+    </Accordion>
     ```
   </Tab>
 </Tabs>
@@ -30,4 +37,8 @@ The Accordion component allows you to create expandable sections in your documen
   The content to be displayed when the accordion is expanded. Can include text, markdown, and components.
 </ParamField>
 
+<ParamField path="defaultOpen" type="boolean" default={false}>
+  Whether the accordion should be open when the page loads. If not specified, the accordion will be collapsed by default.
+</ParamField>
+
 

fern/products/sdks/overview/java/changelog/2025-10-23.mdx

@@ -1,7 +1,7 @@
 ## 3.9.2
 **`(fix):`** Fix nullable field serialization in PATCH requests with wrapped request bodies. Explicit null values
-(Nullable.ofNull()) are now correctly serialized as `{"field": null}` instead of being omitted like
-Nullable.empty().
+`(Nullable.ofNull())` are now correctly serialized as `{"field": null}` instead of being omitted like
+`Nullable.empty()`.
 
 
 ## 3.9.1