Set default max attempts to 3 and use the common variable (#18209)

packages/core/src/core/geminiChat.ts

@@ -18,7 +18,11 @@ import type {
 } from '@google/genai';
 import { toParts } from '../code_assist/converter.js';
 import { createUserContent, FinishReason } from '@google/genai';
-import { retryWithBackoff, isRetryableError } from '../utils/retry.js';
+import {
+  retryWithBackoff,
+  isRetryableError,
+  DEFAULT_MAX_ATTEMPTS,
+} from '../utils/retry.js';
 import type { ValidationRequiredError } from '../utils/googleQuotaErrors.js';
 import type { Config } from '../config/config.js';
 import {
@@ -621,7 +625,7 @@ export class GeminiChat {
       onRetry: (attempt, error, delayMs) => {
         coreEvents.emitRetryAttempt({
           attempt,
-          maxAttempts: availabilityMaxAttempts ?? 10,
+          maxAttempts: availabilityMaxAttempts ?? DEFAULT_MAX_ATTEMPTS,
           delayMs,
           error: error instanceof Error ? error.message : String(error),
           model: lastModelToUse,

packages/core/src/utils/retry.ts

@@ -18,6 +18,7 @@ import { getErrorStatus, ModelNotFoundError } from './httpErrors.js';
 import type { RetryAvailabilityContext } from '../availability/modelPolicy.js';
 
 export type { RetryAvailabilityContext };
+export const DEFAULT_MAX_ATTEMPTS = 3;
 
 export interface RetryOptions {
   maxAttempts: number;
@@ -40,7 +41,7 @@ export interface RetryOptions {
 }
 
 const DEFAULT_RETRY_OPTIONS: RetryOptions = {
-  maxAttempts: 3,
+  maxAttempts: DEFAULT_MAX_ATTEMPTS,
   initialDelayMs: 5000,
   maxDelayMs: 30000, // 30 seconds
   shouldRetryOnError: isRetryableError,