feat: Display initial token usage metrics in /stats (#879)

packages/core/src/core/client.ts

@@ -174,9 +174,10 @@ export class GeminiClient {
     request: PartListUnion,
     signal: AbortSignal,
     turns: number = this.MAX_TURNS,
-  ): AsyncGenerator<ServerGeminiStreamEvent> {
+  ): AsyncGenerator<ServerGeminiStreamEvent, Turn> {
     if (!turns) {
-      return;
+      const chat = await this.chat;
+      return new Turn(chat);
     }
 
     const compressed = await this.tryCompressChat();
@@ -193,9 +194,12 @@ export class GeminiClient {
       const nextSpeakerCheck = await checkNextSpeaker(chat, this, signal);
       if (nextSpeakerCheck?.next_speaker === 'model') {
         const nextRequest = [{ text: 'Please continue.' }];
+        // This recursive call's events will be yielded out, but the final
+        // turn object will be from the top-level call.
         yield* this.sendMessageStream(nextRequest, signal, turns - 1);
       }
     }
+    return turn;
   }
 
   private _logApiRequest(model: string, inputTokenCount: number): void {
@@ -423,6 +427,10 @@ export class GeminiClient {
         });
 
       const result = await retryWithBackoff(apiCall);
+      console.log(
+        'Raw API Response in client.ts:',
+        JSON.stringify(result, null, 2),
+      );
       const durationMs = Date.now() - startTime;
       this._logApiResponse(modelToUse, durationMs, attempt, result);
       return result;