Remove previewFeatures and default to Gemini 3

docs/cli/settings.md

@@ -22,14 +22,13 @@ they appear in the UI.
 
 ### General
 
-| UI Label                        | Setting                            | Description                                                   | Default |
-| ------------------------------- | ---------------------------------- | ------------------------------------------------------------- | ------- |
-| Preview Features (e.g., models) | `general.previewFeatures`          | Enable preview features (e.g., preview models).               | `false` |
-| Vim Mode                        | `general.vimMode`                  | Enable Vim keybindings                                        | `false` |
-| Enable Auto Update              | `general.enableAutoUpdate`         | Enable automatic updates.                                     | `true`  |
-| Enable Prompt Completion        | `general.enablePromptCompletion`   | Enable AI-powered prompt completion suggestions while typing. | `false` |
-| Debug Keystroke Logging         | `general.debugKeystrokeLogging`    | Enable debug logging of keystrokes to the console.            | `false` |
-| Enable Session Cleanup          | `general.sessionRetention.enabled` | Enable automatic session cleanup                              | `false` |
+| UI Label                 | Setting                            | Description                                                   | Default |
+| ------------------------ | ---------------------------------- | ------------------------------------------------------------- | ------- |
+| Vim Mode                 | `general.vimMode`                  | Enable Vim keybindings                                        | `false` |
+| Enable Auto Update       | `general.enableAutoUpdate`         | Enable automatic updates.                                     | `true`  |
+| Enable Prompt Completion | `general.enablePromptCompletion`   | Enable AI-powered prompt completion suggestions while typing. | `false` |
+| Debug Keystroke Logging  | `general.debugKeystrokeLogging`    | Enable debug logging of keystrokes to the console.            | `false` |
+| Enable Session Cleanup   | `general.sessionRetention.enabled` | Enable automatic session cleanup                              | `false` |
 
 ### Output
 

docs/get-started/configuration.md

@@ -98,10 +98,6 @@ their corresponding top-level category object in your `settings.json` file.
 
 #### `general`
 
-- **`general.previewFeatures`** (boolean):
-  - **Description:** Enable preview features (e.g., preview models).
-  - **Default:** `false`
-
 - **`general.preferredEditor`** (string):
   - **Description:** The preferred editor to open files in.
   - **Default:** `undefined`

packages/a2a-server/src/config/config.ts

@@ -18,7 +18,6 @@ import {
   loadServerHierarchicalMemory,
   GEMINI_DIR,
   DEFAULT_GEMINI_EMBEDDING_MODEL,
-  DEFAULT_GEMINI_MODEL,
   type ExtensionLoader,
   startupProfiler,
   PREVIEW_GEMINI_MODEL,
@@ -60,9 +59,7 @@ export async function loadConfig(
 
   const configParams: ConfigParameters = {
     sessionId: taskId,
-    model: settings.general?.previewFeatures
-      ? PREVIEW_GEMINI_MODEL
-      : DEFAULT_GEMINI_MODEL,
+    model: PREVIEW_GEMINI_MODEL,
     embeddingModel: DEFAULT_GEMINI_EMBEDDING_MODEL,
     sandbox: undefined, // Sandbox might not be relevant for a server-side agent
     targetDir: workspaceDir, // Or a specific directory the agent operates on
@@ -104,7 +101,6 @@ export async function loadConfig(
     trustedFolder: true,
     extensionLoader,
     checkpointing,
-    previewFeatures: settings.general?.previewFeatures,
     interactive: true,
     enableInteractiveShell: true,
     ptyInfo: 'auto',

packages/a2a-server/src/config/settings.test.ts

@@ -89,67 +89,6 @@ describe('loadSettings', () => {
     vi.restoreAllMocks();
   });
 
-  it('should load nested previewFeatures from user settings', () => {
-    const settings = {
-      general: {
-        previewFeatures: true,
-      },
-    };
-    fs.writeFileSync(USER_SETTINGS_PATH, JSON.stringify(settings));
-
-    const result = loadSettings(mockWorkspaceDir);
-    expect(result.general?.previewFeatures).toBe(true);
-  });
-
-  it('should load nested previewFeatures from workspace settings', () => {
-    const settings = {
-      general: {
-        previewFeatures: true,
-      },
-    };
-    const workspaceSettingsPath = path.join(
-      mockGeminiWorkspaceDir,
-      'settings.json',
-    );
-    fs.writeFileSync(workspaceSettingsPath, JSON.stringify(settings));
-
-    const result = loadSettings(mockWorkspaceDir);
-    expect(result.general?.previewFeatures).toBe(true);
-  });
-
-  it('should prioritize workspace settings over user settings', () => {
-    const userSettings = {
-      general: {
-        previewFeatures: false,
-      },
-    };
-    fs.writeFileSync(USER_SETTINGS_PATH, JSON.stringify(userSettings));
-
-    const workspaceSettings = {
-      general: {
-        previewFeatures: true,
-      },
-    };
-    const workspaceSettingsPath = path.join(
-      mockGeminiWorkspaceDir,
-      'settings.json',
-    );
-    fs.writeFileSync(workspaceSettingsPath, JSON.stringify(workspaceSettings));
-
-    const result = loadSettings(mockWorkspaceDir);
-    expect(result.general?.previewFeatures).toBe(true);
-  });
-
-  it('should handle missing previewFeatures', () => {
-    const settings = {
-      general: {},
-    };
-    fs.writeFileSync(USER_SETTINGS_PATH, JSON.stringify(settings));
-
-    const result = loadSettings(mockWorkspaceDir);
-    expect(result.general?.previewFeatures).toBeUndefined();
-  });
-
   it('should load other top-level settings correctly', () => {
     const settings = {
       showMemoryUsage: true,

packages/a2a-server/src/config/settings.ts

@@ -31,9 +31,6 @@ export interface Settings {
   showMemoryUsage?: boolean;
   checkpointing?: CheckpointingSettings;
   folderTrust?: boolean;
-  general?: {
-    previewFeatures?: boolean;
-  };
 
   // Git-aware file filtering settings
   fileFiltering?: {

packages/cli/src/config/config.test.ts

@@ -1683,7 +1683,7 @@ describe('loadCliConfig model selection', () => {
       argv,
     );
 
-    expect(config.getModel()).toBe('auto-gemini-2.5');
+    expect(config.getModel()).toBe('auto-gemini-3');
   });
 
   it('always prefers model from argv', async () => {
@@ -1727,7 +1727,7 @@ describe('loadCliConfig model selection', () => {
       argv,
     );
 
-    expect(config.getModel()).toBe('auto-gemini-2.5');
+    expect(config.getModel()).toBe('auto-gemini-3');
   });
 });
 

packages/cli/src/config/config.ts

@@ -15,7 +15,6 @@ import {
   setGeminiMdFilename as setServerGeminiMdFilename,
   getCurrentGeminiMdFilename,
   ApprovalMode,
-  DEFAULT_GEMINI_MODEL_AUTO,
   DEFAULT_GEMINI_EMBEDDING_MODEL,
   DEFAULT_FILE_FILTERING_OPTIONS,
   DEFAULT_MEMORY_FILE_FILTERING_OPTIONS,
@@ -662,9 +661,7 @@ export async function loadCliConfig(
   );
   policyEngineConfig.nonInteractive = !interactive;
 
-  const defaultModel = settings.general?.previewFeatures
-    ? PREVIEW_GEMINI_MODEL_AUTO
-    : DEFAULT_GEMINI_MODEL_AUTO;
+  const defaultModel = PREVIEW_GEMINI_MODEL_AUTO;
   const specifiedModel =
     argv.model || process.env['GEMINI_MODEL'] || settings.model?.name;
 
@@ -740,7 +737,6 @@ export async function loadCliConfig(
       settings.context?.loadMemoryFromIncludeDirectories || false,
     debugMode,
     question,
-    previewFeatures: settings.general?.previewFeatures,
 
     coreTools: settings.tools?.core || undefined,
     allowedTools: allowedTools.length > 0 ? allowedTools : undefined,

packages/cli/src/config/settingsSchema.test.ts

@@ -328,30 +328,6 @@ describe('SettingsSchema', () => {
       ).toBe('Enable debug logging of keystrokes to the console.');
     });
 
-    it('should have previewFeatures setting in schema', () => {
-      expect(
-        getSettingsSchema().general.properties.previewFeatures,
-      ).toBeDefined();
-      expect(getSettingsSchema().general.properties.previewFeatures.type).toBe(
-        'boolean',
-      );
-      expect(
-        getSettingsSchema().general.properties.previewFeatures.category,
-      ).toBe('General');
-      expect(
-        getSettingsSchema().general.properties.previewFeatures.default,
-      ).toBe(false);
-      expect(
-        getSettingsSchema().general.properties.previewFeatures.requiresRestart,
-      ).toBe(false);
-      expect(
-        getSettingsSchema().general.properties.previewFeatures.showInDialog,
-      ).toBe(true);
-      expect(
-        getSettingsSchema().general.properties.previewFeatures.description,
-      ).toBe('Enable preview features (e.g., preview models).');
-    });
-
     it('should have enableAgents setting in schema', () => {
       const setting = getSettingsSchema().experimental.properties.enableAgents;
       expect(setting).toBeDefined();

packages/cli/src/config/settingsSchema.ts

@@ -162,15 +162,6 @@ const SETTINGS_SCHEMA = {
     description: 'General application settings.',
     showInDialog: false,
     properties: {
-      previewFeatures: {
-        type: 'boolean',
-        label: 'Preview Features (e.g., models)',
-        category: 'General',
-        requiresRestart: false,
-        default: false,
-        description: 'Enable preview features (e.g., preview models).',
-        showInDialog: true,
-      },
       preferredEditor: {
         type: 'string',
         label: 'Preferred Editor',

packages/cli/src/config/settings_repro.test.ts

@@ -134,7 +134,6 @@ describe('Settings Repro', () => {
         enablePromptCompletion: false,
         preferredEditor: 'vim',
         vimMode: false,
-        previewFeatures: false,
       },
       security: {
         auth: {

packages/cli/src/test-utils/mockConfig.ts

@@ -151,7 +151,6 @@ export const createMockConfig = (overrides: Partial<Config> = {}): Config =>
     getAllowedMcpServers: vi.fn().mockReturnValue([]),
     getBlockedMcpServers: vi.fn().mockReturnValue([]),
     getExperiments: vi.fn().mockReturnValue(undefined),
-    getPreviewFeatures: vi.fn().mockReturnValue(false),
     getHasAccessToPreviewModel: vi.fn().mockReturnValue(false),
     ...overrides,
   }) as unknown as Config;

packages/cli/src/ui/AppContainer.tsx

@@ -246,7 +246,7 @@ export const AppContainer = (props: AppContainerProps) => {
     [defaultBannerText, warningBannerText],
   );
 
-  const { bannerText } = useBanner(bannerData, config);
+  const { bannerText } = useBanner(bannerData);
 
   const extensionManager = config.getExtensionLoader() as ExtensionManager;
   // We are in the interactive CLI, update how we request consent and settings.
@@ -1772,23 +1772,15 @@ Logging in with Google... Restarting Gemini CLI to continue.
 
     const fetchBannerTexts = async () => {
       const [defaultBanner, warningBanner] = await Promise.all([
-        config.getBannerTextNoCapacityIssues(),
+        // TODO: temporarily disabling the banner, it will be re-added.
+        '',
         config.getBannerTextCapacityIssues(),
       ]);
 
       if (isMounted) {
         setDefaultBannerText(defaultBanner);
         setWarningBannerText(warningBanner);
         setBannerVisible(true);
-        const authType = config.getContentGeneratorConfig()?.authType;
-        if (
-          authType === AuthType.USE_GEMINI ||
-          authType === AuthType.USE_VERTEX_AI
-        ) {
-          setDefaultBannerText(
-            'Gemini 3 Flash and Pro are now available. \nEnable "Preview features" in /settings. \nLearn more at https://goo.gle/enable-preview-features',
-          );
-        }
       }
     };
     // eslint-disable-next-line @typescript-eslint/no-floating-promises

packages/cli/src/ui/components/AppHeader.test.tsx

@@ -89,53 +89,6 @@ describe('<AppHeader />', () => {
     unmount();
   });
 
-  it('should render the banner when previewFeatures is disabled', () => {
-    const mockConfig = makeFakeConfig({ previewFeatures: false });
-    const uiState = {
-      history: [],
-      bannerData: {
-        defaultText: 'This is the default banner',
-        warningText: '',
-      },
-      bannerVisible: true,
-    };
-
-    const { lastFrame, unmount } = renderWithProviders(
-      <AppHeader version="1.0.0" />,
-      {
-        config: mockConfig,
-        uiState,
-      },
-    );
-
-    expect(lastFrame()).toContain('This is the default banner');
-    expect(lastFrame()).toMatchSnapshot();
-    unmount();
-  });
-
-  it('should not render the banner when previewFeatures is enabled', () => {
-    const mockConfig = makeFakeConfig({ previewFeatures: true });
-    const uiState = {
-      history: [],
-      bannerData: {
-        defaultText: 'This is the default banner',
-        warningText: '',
-      },
-    };
-
-    const { lastFrame, unmount } = renderWithProviders(
-      <AppHeader version="1.0.0" />,
-      {
-        config: mockConfig,
-        uiState,
-      },
-    );
-
-    expect(lastFrame()).not.toContain('This is the default banner');
-    expect(lastFrame()).toMatchSnapshot();
-    unmount();
-  });
-
   it('should not render the default banner if shown count is 5 or more', () => {
     const mockConfig = makeFakeConfig();
     const uiState = {

packages/cli/src/ui/components/AppHeader.tsx

@@ -24,7 +24,7 @@ export const AppHeader = ({ version }: AppHeaderProps) => {
   const config = useConfig();
   const { nightly, terminalWidth, bannerData, bannerVisible } = useUIState();
 
-  const { bannerText } = useBanner(bannerData, config);
+  const { bannerText } = useBanner(bannerData);
   const { showTips } = useTips();
 
   return (

packages/cli/src/ui/components/Footer.tsx

@@ -147,7 +147,7 @@ export const Footer: React.FC = () => {
         <Box alignItems="center" justifyContent="flex-end">
           <Box alignItems="center">
             <Text color={theme.text.accent}>
-              {getDisplayString(model, config.getPreviewFeatures())}
+              {getDisplayString(model)}
               <Text color={theme.text.secondary}> /model</Text>
               {!hideContextPercentage && (
                 <>