feat(logging): Add clearcut logging for disabling loop detection (#8503)

packages/core/src/services/loopDetectionService.test.ts

@@ -20,6 +20,7 @@ import { LoopDetectionService } from './loopDetectionService.js';
 
 vi.mock('../telemetry/loggers.js', () => ({
   logLoopDetected: vi.fn(),
+  logLoopDetectionDisabled: vi.fn(),
 }));
 
 const TOOL_CALL_LOOP_THRESHOLD = 5;
@@ -134,6 +135,7 @@ describe('LoopDetectionService', () => {
 
     it('should not detect a loop when disabled for session', () => {
       service.disableForSession();
+      expect(loggers.logLoopDetectionDisabled).toHaveBeenCalledTimes(1);
       const event = createToolCallRequestEvent('testTool', { param: 'value' });
       for (let i = 0; i < TOOL_CALL_LOOP_THRESHOLD; i++) {
         expect(service.addAndCheck(event)).toBe(false);
@@ -746,6 +748,7 @@ describe('LoopDetectionService LLM Checks', () => {
 
   it('should not trigger LLM check when disabled for session', async () => {
     service.disableForSession();
+    expect(loggers.logLoopDetectionDisabled).toHaveBeenCalledTimes(1);
     await advanceTurns(30);
     const result = await service.turnStarted(abortController.signal);
     expect(result).toBe(false);

packages/core/src/services/loopDetectionService.ts

@@ -8,8 +8,15 @@ import type { Content } from '@google/genai';
 import { createHash } from 'node:crypto';
 import type { ServerGeminiStreamEvent } from '../core/turn.js';
 import { GeminiEventType } from '../core/turn.js';
-import { logLoopDetected } from '../telemetry/loggers.js';
-import { LoopDetectedEvent, LoopType } from '../telemetry/types.js';
+import {
+  logLoopDetected,
+  logLoopDetectionDisabled,
+} from '../telemetry/loggers.js';
+import {
+  LoopDetectedEvent,
+  LoopDetectionDisabledEvent,
+  LoopType,
+} from '../telemetry/types.js';
 import type { Config } from '../config/config.js';
 import { DEFAULT_GEMINI_FLASH_MODEL } from '../config/config.js';
 import {
@@ -97,6 +104,10 @@ export class LoopDetectionService {
    */
   disableForSession(): void {
     this.disabledForSession = true;
+    logLoopDetectionDisabled(
+      this.config,
+      new LoopDetectionDisabledEvent(this.promptId),
+    );
   }
 
   private getToolCallKey(toolCall: { name: string; args: object }): string {