feat: add IDE support documentation with intellisense demo video

fern/products/sdks/capabilities.mdx

@@ -11,6 +11,19 @@ layout: overview
 
   </Card>
 
+  <Card title="IDE support" icon="fa-duotone fa-lightbulb" href="/learn/sdks/deep-dives/sdk-user-features#ide-support-and-intellisense">
+    Rich autocomplete and inline documentation in your editor
+
+  <p className="text-(color:--grayscale-a11) font-bold mt-2 flex items-center gap-1">
+    Learn more
+
+    <img src="https://files.buildwithfern.com/fern.docs.buildwithfern.com/learn/2025-09-30T17:39:54.370Z/products/home/pages/images/arrow-right-black.svg" alt="Arrow right light" className="arrow-right dark:hidden m-0 h-4 w-4" noZoom />
+
+    <img src="https://files.buildwithfern.com/fern.docs.buildwithfern.com/learn/2025-09-30T17:39:54.370Z/products/home/pages/images/arrow-right-white.svg" alt="Arrow right light" className="arrow-right hidden dark:block m-0 h-4 w-4" noZoom />
+  </p>
+
+  </Card>
+
   <Card title="Idiomatic method names" icon="fa-duotone fa-code" href="/sdks/deep-dives/customize-method-names">
     Fine-tune SDK resources and method names
 

fern/products/sdks/guides/generated-sdk.mdx

@@ -21,6 +21,16 @@ that lists all available API methods organized by resource, including method
 signatures with parameter types, usage examples, and request/response structures
 for each endpoint.
 
+## IDE support and Intellisense
+
+Fern-generated SDKs include full type definitions that enable rich IDE support. When developers use your SDK in editors like VS Code, they get autocomplete, inline documentation, and type information.
+
+The inline documentation comes from your API definition. During the SDK generation process, Fern embeds your parameter descriptions, return types, and code examples directly in the code as docstrings (Python), JSDoc (TypeScript), Javadoc (Java), etc.
+
+<Frame caption="From Vapi Server SDK (TypeScript)" background="subtle">
+  <img src="../images/intellisense-example.png" alt="IDE intellisense showing method signature and return type"/>
+</Frame>
+
 ## Error handling
 
 When the API returns a 4xx or 5xx status code, the SDK throws an error that includes the status code, error message, response body, and raw response object.
@@ -41,4 +51,4 @@ Your SDK users can configure individual requests using language-specific options
 | Custom headers | Send additional headers with any request | TypeScript, Java, and Swift |
 | Raw response data | Access response headers alongside parsed data | TypeScript, Python, and Go |
 | Query parameters | Add extra query string parameters | TypeScript and Swift |
-| Abort signals | Cancel in-flight requests | TypeScript only |
+| Abort signals | Cancel in-flight requests | TypeScript only |