Remove previewFeatures and default to Gemini 3 (#18414)

packages/cli/src/ui/hooks/useBanner.test.ts

@@ -15,7 +15,6 @@ import {
 import { renderHook } from '../../test-utils/render.js';
 import { useBanner } from './useBanner.js';
 import { persistentState } from '../../utils/persistentState.js';
-import type { Config } from '@google/gemini-cli-core';
 import crypto from 'node:crypto';
 
 vi.mock('../../utils/persistentState.js', () => ({
@@ -39,13 +38,7 @@ vi.mock('../colors.js', () => ({
   },
 }));
 
-// Define the shape of the config methods used by this hook
-interface MockConfigShape {
-  getPreviewFeatures: MockedFunction<() => boolean>;
-}
-
 describe('useBanner', () => {
-  let mockConfig: MockConfigShape;
   const mockedPersistentStateGet = persistentState.get as MockedFunction<
     typeof persistentState.get
   >;
@@ -61,11 +54,6 @@ describe('useBanner', () => {
   beforeEach(() => {
     vi.resetAllMocks();
 
-    // Initialize the mock config with default behavior
-    mockConfig = {
-      getPreviewFeatures: vi.fn().mockReturnValue(false),
-    };
-
     // Default persistentState behavior: return empty object (no counts)
     mockedPersistentStateGet.mockReturnValue({});
   });
@@ -73,25 +61,11 @@ describe('useBanner', () => {
   it('should return warning text and warning color if warningText is present', () => {
     const data = { defaultText: 'Standard', warningText: 'Critical Error' };
 
-    const { result } = renderHook(() =>
-      useBanner(data, mockConfig as unknown as Config),
-    );
+    const { result } = renderHook(() => useBanner(data));
 
     expect(result.current.bannerText).toBe('Critical Error');
   });
 
-  it('should NOT show default banner if preview features are enabled in config', () => {
-    // Simulate Preview Features Enabled
-    mockConfig.getPreviewFeatures.mockReturnValue(true);
-
-    const { result } = renderHook(() =>
-      useBanner(defaultBannerData, mockConfig as unknown as Config),
-    );
-
-    // Should fall back to warningText (which is empty)
-    expect(result.current.bannerText).toBe('');
-  });
-
   it('should hide banner if show count exceeds max limit (Legacy format)', () => {
     mockedPersistentStateGet.mockReturnValue({
       [crypto
@@ -100,9 +74,7 @@ describe('useBanner', () => {
         .digest('hex')]: 5,
     });
 
-    const { result } = renderHook(() =>
-      useBanner(defaultBannerData, mockConfig as unknown as Config),
-    );
+    const { result } = renderHook(() => useBanner(defaultBannerData));
 
     expect(result.current.bannerText).toBe('');
   });
@@ -115,7 +87,7 @@ describe('useBanner', () => {
       [crypto.createHash('sha256').update(data.defaultText).digest('hex')]: 1,
     });
 
-    renderHook(() => useBanner(data, mockConfig as unknown as Config));
+    renderHook(() => useBanner(data));
 
     // Expect set to be called with incremented count
     expect(mockedPersistentStateSet).toHaveBeenCalledWith(
@@ -129,7 +101,7 @@ describe('useBanner', () => {
   it('should NOT increment count if warning text is shown instead', () => {
     const data = { defaultText: 'Standard', warningText: 'Warning' };
 
-    renderHook(() => useBanner(data, mockConfig as unknown as Config));
+    renderHook(() => useBanner(data));
 
     // Since warning text takes precedence, default banner logic (and increment) is skipped
     expect(mockedPersistentStateSet).not.toHaveBeenCalled();
@@ -138,9 +110,7 @@ describe('useBanner', () => {
   it('should handle newline replacements', () => {
     const data = { defaultText: 'Line1\\nLine2', warningText: '' };
 
-    const { result } = renderHook(() =>
-      useBanner(data, mockConfig as unknown as Config),
-    );
+    const { result } = renderHook(() => useBanner(data));
 
     expect(result.current.bannerText).toBe('Line1\nLine2');
   });

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

@@ -6,7 +6,6 @@
 
 import { useState, useEffect, useRef } from 'react';
 import { persistentState } from '../../utils/persistentState.js';
-import type { Config } from '@google/gemini-cli-core';
 import crypto from 'node:crypto';
 
 const DEFAULT_MAX_BANNER_SHOWN_COUNT = 5;
@@ -16,20 +15,9 @@ interface BannerData {
   warningText: string;
 }
 
-export function useBanner(bannerData: BannerData, config: Config) {
+export function useBanner(bannerData: BannerData) {
   const { defaultText, warningText } = bannerData;
 
-  const [previewEnabled, setPreviewEnabled] = useState(
-    config.getPreviewFeatures(),
-  );
-
-  useEffect(() => {
-    const isEnabled = config.getPreviewFeatures();
-    if (isEnabled !== previewEnabled) {
-      setPreviewEnabled(isEnabled);
-    }
-  }, [config, previewEnabled]);
-
   const [bannerCounts] = useState(
     () => persistentState.get('defaultBannerShownCount') || {},
   );
@@ -42,9 +30,7 @@ export function useBanner(bannerData: BannerData, config: Config) {
   const currentBannerCount = bannerCounts[hashedText] || 0;
 
   const showDefaultBanner =
-    warningText === '' &&
-    !previewEnabled &&
-    currentBannerCount < DEFAULT_MAX_BANNER_SHOWN_COUNT;
+    warningText === '' && currentBannerCount < DEFAULT_MAX_BANNER_SHOWN_COUNT;
 
   const rawBannerText = showDefaultBanner ? defaultText : warningText;
   const bannerText = rawBannerText.replace(/\\n/g, '\n');

packages/cli/src/ui/hooks/useQuotaAndFallback.test.ts

@@ -328,8 +328,7 @@ describe('useQuotaAndFallback', () => {
         const message = request!.message;
         expect(message).toBe(
           `It seems like you don't have access to gemini-3-pro-preview.
-Learn more at https://goo.gle/enable-preview-features
-To disable gemini-3-pro-preview, disable "Preview features" in /settings.`,
+Your admin might have disabled the access. Contact them to enable the Preview Release Channel.`,
         );
 
         // Simulate the user choosing to switch

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

@@ -90,8 +90,7 @@ export function useQuotaAndFallback({
         isModelNotFoundError = true;
         const messageLines = [
           `It seems like you don't have access to ${failedModel}.`,
-          `Learn more at https://goo.gle/enable-preview-features`,
-          `To disable ${failedModel}, disable "Preview features" in /settings.`,
+          `Your admin might have disabled the access. Contact them to enable the Preview Release Channel.`,
         ];
         message = messageLines.join('\n');
       } else {