chore: migrate from responseSchema to use responseJsonSchema. (#4814)

packages/core/src/services/loopDetectionService.ts

@@ -9,7 +9,6 @@ import { GeminiEventType, ServerGeminiStreamEvent } from '../core/turn.js';
 import { logLoopDetected } from '../telemetry/loggers.js';
 import { LoopDetectedEvent, LoopType } from '../telemetry/types.js';
 import { Config, DEFAULT_GEMINI_FLASH_MODEL } from '../config/config.js';
-import { SchemaUnion, Type } from '@google/genai';
 
 const TOOL_CALL_LOOP_THRESHOLD = 5;
 const CONTENT_LOOP_THRESHOLD = 10;
@@ -341,16 +340,16 @@ Please analyze the conversation history to determine the possibility that the co
       ...recentHistory,
       { role: 'user', parts: [{ text: prompt }] },
     ];
-    const schema: SchemaUnion = {
-      type: Type.OBJECT,
+    const schema: Record<string, unknown> = {
+      type: 'object',
       properties: {
         reasoning: {
-          type: Type.STRING,
+          type: 'string',
           description:
             'Your reasoning on if the conversation is looping without forward progress.',
         },
         confidence: {
-          type: Type.NUMBER,
+          type: 'number',
           description:
             'A number between 0.0 and 1.0 representing your confidence that the conversation is in an unproductive state.',
         },