Document context parameter for assistant API

api/assistant/create-assistant-message.mdx

@@ -5,7 +5,7 @@
 
 ## Integration with `useChat`
 
 The `useChat` hook from Vercel's AI SDK is the recommended way to integrate the assistant API into your application.
 
 <Note>
   The Mintlify assistant API is compatible with **AI SDK v4**. If you use AI SDK v5 or later, you must configure a custom transport.
@@ -33,6 +33,13 @@
     body: {
       fp: 'anonymous',
       retrievalPageSize: 5,
+      context: [
+        {
+          type: 'code',
+          value: 'const example = "code snippet";',
+          elementId: 'code-block-1',
+        },
+      ],
     },
     streamProtocol: 'data',
     sendExtraMessageFields: true,
@@ -58,9 +65,15 @@
 **Required configuration for Mintlify:**
 - `streamProtocol: 'data'` - Required for streaming responses.
 - `sendExtraMessageFields: true` - Required to send message metadata.
 - `body.fp` - Fingerprint identifier (use 'anonymous' or a user identifier).
 - `body.retrievalPageSize` - Number of search results to use (recommended: 5).
 
+**Optional configuration:**
+- `body.context` - Array of contextual information to provide to the assistant. Each context object contains:
+  - `type` - Either `'code'` or `'textSelection'`.
+  - `value` - The code snippet or selected text content.
+  - `elementId` (optional) - Identifier for the UI element containing the context.
+
 </Step>
 </Steps>