fix(core): remove duplicate initialize call on agents refreshed (#25670)

packages/core/src/agents/a2aUtils.test.ts

@@ -538,5 +538,52 @@ describe('a2aUtils', () => {
       expect(output).toContain('Artifact (Data):');
       expect(output).not.toContain('Answer from history');
     });
+
+    it('should return message log as activity items', () => {
+      const reassembler = new A2AResultReassembler();
+
+      reassembler.update({
+        kind: 'status-update',
+        taskId: 't1',
+        contextId: 'ctx1',
+        status: {
+          state: 'working',
+          message: {
+            kind: 'message',
+            role: 'agent',
+            parts: [{ kind: 'text', text: 'Message 1' }],
+          } as Message,
+        },
+      } as unknown as SendMessageResult);
+
+      reassembler.update({
+        kind: 'status-update',
+        taskId: 't1',
+        contextId: 'ctx1',
+        status: {
+          state: 'working',
+          message: {
+            kind: 'message',
+            role: 'agent',
+            parts: [{ kind: 'text', text: 'Message 2' }],
+          } as Message,
+        },
+      } as unknown as SendMessageResult);
+
+      const items = reassembler.toActivityItems();
+      expect(items).toHaveLength(2);
+      expect(items[0]).toEqual({
+        id: 'msg-0',
+        type: 'thought',
+        content: 'Message 1',
+        status: 'completed',
+      });
+      expect(items[1]).toEqual({
+        id: 'msg-1',
+        type: 'thought',
+        content: 'Message 2',
+        status: 'completed',
+      });
+    });
   });
 });

packages/core/src/agents/a2aUtils.ts

@@ -124,6 +124,7 @@ export class A2AResultReassembler {
 
   private pushMessage(message: Message | undefined) {
     if (!message) return;
+    if (message.role === 'user') return; // Skip user messages reflected by server
     const text = extractPartsText(message.parts, '');
     if (text && this.messageLog[this.messageLog.length - 1] !== text) {
       this.messageLog.push(text);
@@ -135,21 +136,36 @@ export class A2AResultReassembler {
    */
   toActivityItems(): SubagentActivityItem[] {
     const isAuthRequired = this.messageLog.includes(AUTH_REQUIRED_MSG);
-    return [
-      isAuthRequired
-        ? {
-            id: 'auth-required',
-            type: 'thought',
-            content: AUTH_REQUIRED_MSG,
-            status: 'running',
-          }
-        : {
-            id: 'pending',
-            type: 'thought',
-            content: 'Working...',
-            status: 'running',
-          },
-    ];
+    const items: SubagentActivityItem[] = [];
+
+    if (isAuthRequired) {
+      items.push({
+        id: 'auth-required',
+        type: 'thought',
+        content: AUTH_REQUIRED_MSG,
+        status: 'running',
+      });
+    }
+
+    this.messageLog.forEach((msg, index) => {
+      items.push({
+        id: `msg-${index}`,
+        type: 'thought',
+        content: msg.trim(),
+        status: 'completed',
+      });
+    });
+
+    if (items.length === 0 && !isAuthRequired) {
+      items.push({
+        id: 'pending',
+        type: 'thought',
+        content: 'Working...',
+        status: 'running',
+      });
+    }
+
+    return items;
   }
 
   /**