feat(agents): add support for remote agents (#16013)

packages/core/src/agents/a2a-client-manager.test.ts

@@ -8,6 +8,7 @@ import { vi, describe, it, expect, beforeEach, afterEach } from 'vitest';
 import {
   A2AClientManager,
   type SendMessageResult,
+  createAdapterFetch,
 } from './a2a-client-manager.js';
 import type { AgentCard, Task } from '@a2a-js/sdk';
 import type { AuthenticationHandler, Client } from '@a2a-js/sdk/client';
@@ -302,4 +303,42 @@ describe('A2AClientManager', () => {
       ).rejects.toThrow("Agent 'NonExistentAgent' not found.");
     });
   });
+
+  describe('createAdapterFetch', () => {
+    it('normalizes TASK_STATE_ enums to lower-case', async () => {
+      const baseFetch = vi
+        .fn()
+        .mockResolvedValue(
+          new Response(
+            JSON.stringify({ status: { state: 'TASK_STATE_WORKING' } }),
+          ),
+        );
+
+      const adapter = createAdapterFetch(baseFetch as typeof fetch);
+      const response = await adapter('http://example.com', {
+        method: 'POST',
+        body: '{}',
+      });
+      const data = await response.json();
+
+      expect(data.status.state).toBe('working');
+    });
+
+    it('lowercases non-prefixed task states', async () => {
+      const baseFetch = vi
+        .fn()
+        .mockResolvedValue(
+          new Response(JSON.stringify({ status: { state: 'WORKING' } })),
+        );
+
+      const adapter = createAdapterFetch(baseFetch as typeof fetch);
+      const response = await adapter('http://example.com', {
+        method: 'POST',
+        body: '{}',
+      });
+      const data = await response.json();
+
+      expect(data.status.state).toBe('working');
+    });
+  });
 });