fix(core): skip telemetry logging for AbortError exceptions (#19477)

Co-authored-by: Yuna Seol <yunaseol@google.com>

packages/core/src/utils/errors.test.ts

@@ -7,6 +7,7 @@
 import { describe, it, expect } from 'vitest';
 import {
   isAuthenticationError,
+  isAbortError,
   UnauthorizedError,
   toFriendlyError,
   BadRequestError,
@@ -48,6 +49,29 @@ describe('getErrorMessage', () => {
   });
 });
 
+describe('isAbortError', () => {
+  it('should return true for AbortError', () => {
+    const error = new Error('Aborted');
+    error.name = 'AbortError';
+    expect(isAbortError(error)).toBe(true);
+  });
+
+  it('should return true for DOMException AbortError', () => {
+    const error = new DOMException('Aborted', 'AbortError');
+    expect(isAbortError(error)).toBe(true);
+  });
+
+  it('should return false for other errors', () => {
+    expect(isAbortError(new Error('Other error'))).toBe(false);
+  });
+
+  it('should return false for non-error objects', () => {
+    expect(isAbortError({ name: 'AbortError' })).toBe(false);
+    expect(isAbortError(null)).toBe(false);
+    expect(isAbortError('AbortError')).toBe(false);
+  });
+});
+
 describe('isAuthenticationError', () => {
   it('should detect error with code: 401 property (MCP SDK style)', () => {
     const error = { code: 401, message: 'Unauthorized' };

packages/core/src/utils/errors.ts

@@ -26,6 +26,13 @@ export function isNodeError(error: unknown): error is NodeJS.ErrnoException {
   return error instanceof Error && 'code' in error;
 }
 
+/**
+ * Checks if an error is an AbortError.
+ */
+export function isAbortError(error: unknown): boolean {
+  return error instanceof Error && error.name === 'AbortError';
+}
+
 export function getErrorMessage(error: unknown): string {
   const friendlyError = toFriendlyError(error);
   if (friendlyError instanceof Error) {