feat(core): Disable fast ack helper for hints.

packages/cli/src/integration-tests/modelSteering.test.tsx

@@ -65,10 +65,6 @@ describe('Model Steering Integration', () => {
     // Resolve list_directory (Proceed)
     await rig.resolveTool('ReadFolder');
 
-    // Wait for the model to process the hint and output the next action
-    // Based on steering.responses, it should first acknowledge the hint
-    await rig.waitForOutput('ACK: I will focus on .txt files now.');
-
     // Then it should proceed with the next action
     await rig.waitForOutput(
       /Since you want me to focus on .txt files,[\s\S]*I will read file1.txt/,

packages/cli/src/test-utils/fixtures/steering.responses

@@ -1,4 +1,3 @@
 {"method":"generateContentStream","response":[{"candidates":[{"content":{"role":"model","parts":[{"text":"Starting a long task. First, I'll list the files."},{"functionCall":{"name":"list_directory","args":{"dir_path":"."}}}]},"finishReason":"STOP"}]}]}
-{"method":"generateContent","response":{"candidates":[{"content":{"role":"model","parts":[{"text":"ACK: I will focus on .txt files now."}]},"finishReason":"STOP"}]}}
 {"method":"generateContentStream","response":[{"candidates":[{"content":{"role":"model","parts":[{"text":"I see the files. Since you want me to focus on .txt files, I will read file1.txt."},{"functionCall":{"name":"read_file","args":{"file_path":"file1.txt"}}}]},"finishReason":"STOP"}]}]}
 {"method":"generateContentStream","response":[{"candidates":[{"content":{"role":"model","parts":[{"text":"I have read file1.txt. Task complete."}]},"finishReason":"STOP"}]}]}

packages/cli/src/ui/AppContainer.tsx

@@ -81,7 +81,6 @@ import {
   type AgentsDiscoveredPayload,
   ChangeAuthRequestedError,
   CoreToolCallStatus,
-  generateSteeringAckMessage,
   buildUserSteeringHintPrompt,
   logBillingEvent,
   ApiKeyUpdatedEvent,
@@ -2106,15 +2105,6 @@ Logging in with Google... Restarting Gemini CLI to continue.
       return;
     }
 
-    void generateSteeringAckMessage(
-      config.getBaseLlmClient(),
-      pendingHint,
-    ).then((ackText) => {
-      historyManager.addItem({
-        type: 'info',
-        text: ackText,
-      });
-    });
     void submitQuery([{ text: buildUserSteeringHintPrompt(pendingHint) }]);
   }, [
     config,

packages/cli/src/ui/hooks/useGeminiStream.test.tsx

@@ -807,14 +807,6 @@ describe('useGeminiStream', () => {
     expect(injectedHintPart.text).toContain(
       'Do not cancel/skip tasks unless the user explicitly cancels them.',
     );
-    expect(
-      mockAddItem.mock.calls.some(
-        ([item]) =>
-          item?.type === 'info' &&
-          typeof item.text === 'string' &&
-          item.text.includes('Got it. Focusing on tests only.'),
-      ),
-    ).toBe(true);
 
     expect(mockRunInDevTraceSpan).toHaveBeenCalledWith(
       expect.objectContaining({

packages/cli/src/ui/hooks/useGeminiStream.ts

@@ -35,7 +35,6 @@
   CoreEvent,
   CoreToolCallStatus,
   buildUserSteeringHintPrompt,
-  generateSteeringAckMessage,
   GeminiCliOperation,
   getPlanModeExitMessage,
 } from '@google/gemini-cli-core';
@@ -1761,18 +1760,6 @@
           responsesToSend.unshift({
             text: buildUserSteeringHintPrompt(hintText),
           });
-          void generateSteeringAckMessage(
-            config.getBaseLlmClient(),
-            hintText,
-          ).then((ackText) => {
-            addItem({
-              type: 'info',
-              icon: '· ',
-              color: theme.text.secondary,
-              marginBottom: 1,
-              text: ackText,
-            } as HistoryItemInfo);
-          });
         }
       }
 
@@ -1800,7 +1787,7 @@
         prompt_ids[0],
       );
     },
     [
       submitQuery,
       markToolsAsSubmitted,
       geminiClient,