diff --git a/packages/vscode-ide-companion/src/webview/handlers/SessionMessageHandler.test.ts b/packages/vscode-ide-companion/src/webview/handlers/SessionMessageHandler.test.ts
index 2677f6507e..a4b3908220 100644
--- a/packages/vscode-ide-companion/src/webview/handlers/SessionMessageHandler.test.ts
+++ b/packages/vscode-ide-companion/src/webview/handlers/SessionMessageHandler.test.ts
@@ -225,6 +225,64 @@ describe('SessionMessageHandler', () => {
     ]);
   });
 
+  it('echoes the user prompt into the ACP transcript as a user_message_chunk', async () => {
+    mockProcessImageAttachments.mockResolvedValue({
+      formattedText: 'hello transcript',
+      displayText: 'hello transcript',
+      savedImageCount: 0,
+      promptImages: [],
+    });
+
+    const agentManager = {
+      isConnected: true,
+      currentSessionId: 'session-1',
+      sendMessage: vi.fn().mockResolvedValue(undefined),
+    };
+    const conversationStore = {
+      createConversation: vi.fn().mockResolvedValue({ id: 'conversation-1' }),
+      getConversation: vi.fn().mockResolvedValue(null),
+      addMessage: vi.fn(),
+      renameConversationId: vi.fn().mockResolvedValue(true),
+    };
+    const sendToWebView = vi.fn();
+
+    const handler = new SessionMessageHandler(
+      agentManager as never,
+      conversationStore as never,
+      null,
+      sendToWebView,
+    );
+
+    await handler.handle({
+      type: 'sendMessage',
+      data: { text: 'hello transcript' },
+    });
+
+    // The direct stdio ACP channel never emits user_message_chunk for an
+    // interactive prompt; the handler must synthesize it so the user's own
+    // turn renders in the WebShell transcript timeline.
+    expect(sendToWebView).toHaveBeenCalledWith({
+      type: 'transcriptUpdate',
+      data: {
+        sessionId: 'session-1',
+        update: {
+          sessionUpdate: 'user_message_chunk',
+          content: { type: 'text', text: 'hello transcript' },
+        },
+      },
+    });
+    // The echo must be posted before the prompt is dispatched so the user
+    // block renders ahead of this turn's assistant frames.
+    const echoCallIndex = sendToWebView.mock.calls.findIndex(
+      (call) =>
+        (call[0] as { type?: string } | undefined)?.type === 'transcriptUpdate',
+    );
+    expect(echoCallIndex).toBeGreaterThanOrEqual(0);
+    expect(sendToWebView.mock.invocationCallOrder[echoCallIndex]).toBeLessThan(
+      agentManager.sendMessage.mock.invocationCallOrder[0],
+    );
+  });
+
   it('sends image file context as prompt image blocks', async () => {
     mockProcessImageAttachments.mockImplementation(
       async (promptText: string) => ({
@@ -990,6 +1048,66 @@ describe('SessionMessageHandler', () => {
     );
   });
 
+  it('publishes the fresh ACP session id as liveSessionId in the load-failure fallback boundary', async () => {
+    const archivedSessionId = 'archived-session';
+    const agentManager: {
+      isConnected: boolean;
+      currentSessionId: string | null;
+      getSessionList: ReturnType<typeof vi.fn>;
+      loadSessionViaAcp: ReturnType<typeof vi.fn>;
+      getSessionMessages: ReturnType<typeof vi.fn>;
+      createNewSession: ReturnType<typeof vi.fn>;
+    } = {
+      isConnected: true,
+      currentSessionId: 'old-acp-session',
+      getSessionList: vi
+        .fn()
+        .mockResolvedValue([{ id: archivedSessionId, cwd: '/workspace' }]),
+      loadSessionViaAcp: vi
+        .fn()
+        .mockRejectedValue(new Error('session not found on server')),
+      getSessionMessages: vi.fn().mockResolvedValue([]),
+      createNewSession: vi.fn(),
+    };
+    // Mirror the real manager: session/new flips currentSessionId to the
+    // freshly created ACP session.
+    agentManager.createNewSession.mockImplementation(async () => {
+      agentManager.currentSessionId = 'new-acp-session';
+      return 'new-acp-session';
+    });
+    const conversationStore = {
+      createConversation: vi.fn(),
+      getConversation: vi.fn(),
+      addMessage: vi.fn(),
+    };
+    const sendToWebView = vi.fn();
+
+    const handler = new SessionMessageHandler(
+      agentManager as never,
+      conversationStore as never,
+      null,
+      sendToWebView,
+    );
+
+    await handler.handle({
+      type: 'switchQwenSession',
+      data: { sessionId: archivedSessionId },
+    });
+
+    // The transcript filter must learn the live session id from the
+    // boundary; otherwise every live frame of the fresh session is
+    // dropped because it does not carry the archived id.
+    expect(sendToWebView).toHaveBeenCalledWith(
+      expect.objectContaining({
+        type: 'qwenSessionSwitched',
+        data: expect.objectContaining({
+          sessionId: archivedSessionId,
+          liveSessionId: 'new-acp-session',
+        }),
+      }),
+    );
+  });
+
   it('forces a fresh ACP session when the webview requests a new session', async () => {
     const agentManager = {
       isConnected: true,
diff --git a/packages/vscode-ide-companion/src/webview/handlers/SessionMessageHandler.ts b/packages/vscode-ide-companion/src/webview/handlers/SessionMessageHandler.ts
index 91872fd3cd..34ac1d2dde 100644
--- a/packages/vscode-ide-companion/src/webview/handlers/SessionMessageHandler.ts
+++ b/packages/vscode-ide-companion/src/webview/handlers/SessionMessageHandler.ts
@@ -871,6 +871,25 @@ export class SessionMessageHandler extends BaseMessageHandler {
         },
       });
 
+      // The companion's direct stdio ACP channel never receives a
+      // user_message_chunk for an interactive prompt, so echo the user's
+      // own turn into the transcript timeline (mirrors the daemon-bridge
+      // echo on the SSE bus). Posted before the prompt is dispatched so
+      // the user block renders ahead of this turn's assistant frames.
+      const transcriptEchoSessionId = this.agentManager.currentSessionId;
+      if (transcriptEchoSessionId && displayText) {
+        this.sendToWebView({
+          type: 'transcriptUpdate',
+          data: {
+            sessionId: transcriptEchoSessionId,
+            update: {
+              sessionUpdate: 'user_message_chunk',
+              content: { type: 'text', text: displayText },
+            },
+          },
+        });
+      }
+
       await this.agentManager.sendMessage(
         buildPromptBlocks(promptText, promptImages),
       );