diff --git a/packages/cli/src/ui/AppContainer.tsx b/packages/cli/src/ui/AppContainer.tsx
index efdc7223ea..0bba196e1d 100644
--- a/packages/cli/src/ui/AppContainer.tsx
+++ b/packages/cli/src/ui/AppContainer.tsx
@@ -89,6 +89,7 @@ import {
   buildUserSteeringHintPrompt,
   logBillingEvent,
   ApiKeyUpdatedEvent,
+  LegacyAgentProtocol,
   type InjectionSource,
   startMemoryService,
 } from '@google/gemini-cli-core';
@@ -118,6 +119,7 @@ import { computeTerminalTitle } from '../utils/windowTitle.js';
 import { useTextBuffer } from './components/shared/text-buffer.js';
 import { useLogger } from './hooks/useLogger.js';
 import { useGeminiStream } from './hooks/useGeminiStream.js';
+import { useAgentStream } from './hooks/useAgentStream.js';
 import { type BackgroundTask } from './hooks/useExecutionLifecycle.js';
 import { useVim } from './hooks/vim.js';
 import { type LoadableSettingScope, SettingScope } from '../config/settings.js';
@@ -1161,6 +1163,46 @@ Logging in with Google... Restarting Gemini CLI to continue.
     };
   }, [config]);
 
+  const streamAgent = useMemo(
+    () =>
+      config?.getAgentSessionInteractiveEnabled()
+        ? new LegacyAgentProtocol({ config, getPreferredEditor })
+        : undefined,
+    [config, getPreferredEditor],
+  );
+
+  const activeStream = streamAgent
+    ? // eslint-disable-next-line react-hooks/rules-of-hooks
+      useAgentStream({
+        agent: streamAgent,
+        addItem: historyManager.addItem,
+        onCancelSubmit,
+        isShellFocused: embeddedShellFocused,
+        logger,
+      })
+    : // eslint-disable-next-line react-hooks/rules-of-hooks
+      useGeminiStream(
+        config.getGeminiClient(),
+        historyManager.history,
+        historyManager.addItem,
+        config,
+        settings,
+        setDebugMessage,
+        handleSlashCommand,
+        shellModeActive,
+        getPreferredEditor,
+        onAuthError,
+        performMemoryRefresh,
+        modelSwitchedFromQuotaError,
+        setModelSwitchedFromQuotaError,
+        onCancelSubmit,
+        setEmbeddedShellFocused,
+        terminalWidth,
+        terminalHeight,
+        embeddedShellFocused,
+        consumePendingHints,
+      );
+
   const {
     streamingState,
     submitQuery,
@@ -1180,27 +1222,7 @@ Logging in with Google... Restarting Gemini CLI to continue.
     backgroundTasks,
     dismissBackgroundTask,
     retryStatus,
-  } = useGeminiStream(
-    config.getGeminiClient(),
-    historyManager.history,
-    historyManager.addItem,
-    config,
-    settings,
-    setDebugMessage,
-    handleSlashCommand,
-    shellModeActive,
-    getPreferredEditor,
-    onAuthError,
-    performMemoryRefresh,
-    modelSwitchedFromQuotaError,
-    setModelSwitchedFromQuotaError,
-    onCancelSubmit,
-    setEmbeddedShellFocused,
-    terminalWidth,
-    terminalHeight,
-    embeddedShellFocused,
-    consumePendingHints,
-  );
+  } = activeStream;
 
   const pendingHistoryItems = useMemo(
     () => [...pendingSlashCommandHistoryItems, ...pendingGeminiHistoryItems],
@@ -1783,7 +1805,7 @@ Logging in with Google... Restarting Gemini CLI to continue.
       if (keyMatchers[Command.QUIT](key)) {
         // If the user presses Ctrl+C, we want to cancel any ongoing requests.
         // This should happen regardless of the count.
-        cancelOngoingRequest?.();
+        void cancelOngoingRequest?.();
 
         handleCtrlCPress();
         return true;