chore(chat): Remove proposed API

package.json

@@ -32,9 +32,7 @@
     "color": "#3D4F58",
     "theme": "dark"
   },
-  "enabledApiProposals": [
-    "chatParticipantAdditions"
-  ],
+  "enabledApiProposals": [],
   "license": "SEE LICENSE IN LICENSE.txt",
   "main": "./dist/extension.js",
   "scripts": {

src/participant/participant.ts

@@ -1417,9 +1417,18 @@ Please see our [FAQ](https://www.mongodb.com/docs/generative-ai-faq/) for more i
     if (feedback.result.metadata?.intent === 'docs') {
       await this._rateDocsChatbotMessage(feedback);
     }
+
+    // unhelpfulReason is available in insider builds and is accessed through
+    // https://github.com/microsoft/vscode/blob/main/src/vscode-dts/vscode.proposed.chatParticipantAdditions.d.ts
+    // Since this is a proposed API, we can't depend on it being available, which is why
+    // we're dynamically checking for it.
+    const unhelpfulReason =
+      'unhelpfulReason' in feedback
+        ? (feedback.unhelpfulReason as string)
+        : undefined;
     this._telemetryService.trackCopilotParticipantFeedback({
       feedback: chatResultFeedbackKindToTelemetryValue(feedback.kind),
-      reason: feedback.unhelpfulReason,
+      reason: unhelpfulReason,
       response_type: (feedback.result as ChatResult)?.metadata.intent,
     });
   }

src/test/suite/participant/participant.test.ts

@@ -1578,7 +1578,7 @@ Schema:
           },
         },
         unhelpfulReason: 'incompleteCode',
-      });
+      } as vscode.ChatResultFeedback);
 
       sinon.assert.calledOnce(telemetryTrackStub);
       expect(telemetryTrackStub.lastCall.args[0]).to.be.equal(