diff --git a/packages/cli/src/config/config.test.ts b/packages/cli/src/config/config.test.ts
index 701ae267..178980eb 100644
--- a/packages/cli/src/config/config.test.ts
+++ b/packages/cli/src/config/config.test.ts
@@ -1010,33 +1010,6 @@ describe('loadCliConfig model selection', () => {
   });
 });
 
-describe('loadCliConfig ideModeFeature', () => {
-  const originalArgv = process.argv;
-  const originalEnv = { ...process.env };
-
-  beforeEach(() => {
-    vi.resetAllMocks();
-    vi.mocked(os.homedir).mockReturnValue('/mock/home/user');
-    process.env.GEMINI_API_KEY = 'test-api-key';
-    delete process.env.SANDBOX;
-    delete process.env.GEMINI_CLI_IDE_SERVER_PORT;
-  });
-
-  afterEach(() => {
-    process.argv = originalArgv;
-    process.env = originalEnv;
-    vi.restoreAllMocks();
-  });
-
-  it('should be false by default', async () => {
-    process.argv = ['node', 'script.js'];
-    const settings: Settings = {};
-    const argv = await parseArguments();
-    const config = await loadCliConfig(settings, [], 'test-session', argv);
-    expect(config.getIdeModeFeature()).toBe(false);
-  });
-});
-
 describe('loadCliConfig folderTrustFeature', () => {
   const originalArgv = process.argv;
   const originalEnv = { ...process.env };
diff --git a/packages/cli/src/config/config.ts b/packages/cli/src/config/config.ts
index 52600e42..d0658e75 100644
--- a/packages/cli/src/config/config.ts
+++ b/packages/cli/src/config/config.ts
@@ -67,7 +67,6 @@ export interface CliArgs {
   experimentalAcp: boolean | undefined;
   extensions: string[] | undefined;
   listExtensions: boolean | undefined;
-  ideModeFeature: boolean | undefined;
   proxy: string | undefined;
   includeDirectories: string[] | undefined;
 }
@@ -200,10 +199,6 @@ export async function parseArguments(): Promise<CliArgs> {
           type: 'boolean',
           description: 'List all available extensions and exit.',
         })
-        .option('ide-mode-feature', {
-          type: 'boolean',
-          description: 'Run in IDE mode?',
-        })
         .option('proxy', {
           type: 'string',
           description:
@@ -307,8 +302,6 @@ export async function loadCliConfig(
   const memoryImportFormat = settings.memoryImportFormat || 'tree';
 
   const ideMode = settings.ideMode ?? false;
-  const ideModeFeature =
-    argv.ideModeFeature ?? settings.ideModeFeature ?? false;
 
   const folderTrustFeature = settings.folderTrustFeature ?? false;
   const folderTrustSetting = settings.folderTrust ?? false;
@@ -474,7 +467,6 @@ export async function loadCliConfig(
     noBrowser: !!process.env.NO_BROWSER,
     summarizeToolOutput: settings.summarizeToolOutput,
     ideMode,
-    ideModeFeature,
     chatCompression: settings.chatCompression,
     folderTrustFeature,
     folderTrust,
diff --git a/packages/cli/src/config/settingsSchema.test.ts b/packages/cli/src/config/settingsSchema.test.ts
index ab820ee1..118b1823 100644
--- a/packages/cli/src/config/settingsSchema.test.ts
+++ b/packages/cli/src/config/settingsSchema.test.ts
@@ -44,7 +44,6 @@ describe('SettingsSchema', () => {
         'telemetry',
         'bugCommand',
         'summarizeToolOutput',
-        'ideModeFeature',
         'dnsResolutionOrder',
         'excludedProjectEnvVars',
         'disableUpdateNag',
diff --git a/packages/cli/src/config/settingsSchema.ts b/packages/cli/src/config/settingsSchema.ts
index cd8c61fb..f061b16a 100644
--- a/packages/cli/src/config/settingsSchema.ts
+++ b/packages/cli/src/config/settingsSchema.ts
@@ -395,15 +395,7 @@ export const SETTINGS_SCHEMA = {
     description: 'Settings for summarizing tool output.',
     showInDialog: false,
   },
-  ideModeFeature: {
-    type: 'boolean',
-    label: 'IDE Mode Feature Flag',
-    category: 'Advanced',
-    requiresRestart: true,
-    default: undefined as boolean | undefined,
-    description: 'Internal feature flag for IDE mode.',
-    showInDialog: false,
-  },
+
   dnsResolutionOrder: {
     type: 'string',
     label: 'DNS Resolution Order',
diff --git a/packages/cli/src/gemini.tsx b/packages/cli/src/gemini.tsx
index a0cf352e..acc9c4b2 100644
--- a/packages/cli/src/gemini.tsx
+++ b/packages/cli/src/gemini.tsx
@@ -191,7 +191,7 @@ export async function main() {
 
   await config.initialize();
 
-  if (config.getIdeMode() && config.getIdeModeFeature()) {
+  if (config.getIdeMode()) {
     await config.getIdeClient().connect();
     logIdeConnection(config, new IdeConnectionEvent(IdeConnectionType.START));
   }
diff --git a/packages/cli/src/ui/App.test.tsx b/packages/cli/src/ui/App.test.tsx
index 82ba4fe1..3636823b 100644
--- a/packages/cli/src/ui/App.test.tsx
+++ b/packages/cli/src/ui/App.test.tsx
@@ -155,13 +155,13 @@ vi.mock('@google/gemini-cli-core', async (importOriginal) => {
         setFlashFallbackHandler: vi.fn(),
         getSessionId: vi.fn(() => 'test-session-id'),
         getUserTier: vi.fn().mockResolvedValue(undefined),
-        getIdeModeFeature: vi.fn(() => false),
-        getIdeMode: vi.fn(() => false),
+        getIdeMode: vi.fn(() => true),
         getWorkspaceContext: vi.fn(() => ({
           getDirectories: vi.fn(() => []),
         })),
         getIdeClient: vi.fn(() => ({
           getCurrentIde: vi.fn(() => 'vscode'),
+          getDetectedIdeDisplayName: vi.fn(() => 'VSCode'),
         })),
       };
     });
diff --git a/packages/cli/src/ui/App.tsx b/packages/cli/src/ui/App.tsx
index ab30b730..1caabbe0 100644
--- a/packages/cli/src/ui/App.tsx
+++ b/packages/cli/src/ui/App.tsx
@@ -130,7 +130,6 @@ const App = ({ config, settings, startupWarnings = [], version }: AppProps) => {
     registerCleanup(() => config.getIdeClient().disconnect());
   }, [config]);
   const shouldShowIdePrompt =
-    config.getIdeModeFeature() &&
     currentIDE &&
     !config.getIdeMode() &&
     !settings.merged.hasSeenIdeIntegrationNudge &&
diff --git a/packages/cli/src/ui/commands/ideCommand.test.ts b/packages/cli/src/ui/commands/ideCommand.test.ts
index 10a97e2a..8576320b 100644
--- a/packages/cli/src/ui/commands/ideCommand.test.ts
+++ b/packages/cli/src/ui/commands/ideCommand.test.ts
@@ -40,7 +40,6 @@ describe('ideCommand', () => {
     } as unknown as CommandContext;
 
     mockConfig = {
-      getIdeModeFeature: vi.fn(),
       getIdeMode: vi.fn(),
       getIdeClient: vi.fn(() => ({
         reconnect: vi.fn(),
@@ -60,14 +59,12 @@ describe('ideCommand', () => {
     vi.restoreAllMocks();
   });
 
-  it('should return null if ideModeFeature is not enabled', () => {
-    vi.mocked(mockConfig.getIdeModeFeature).mockReturnValue(false);
-    const command = ideCommand(mockConfig);
+  it('should return null if config is not provided', () => {
+    const command = ideCommand(null);
     expect(command).toBeNull();
   });
 
-  it('should return the ide command if ideModeFeature is enabled', () => {
-    vi.mocked(mockConfig.getIdeModeFeature).mockReturnValue(true);
+  it('should return the ide command', () => {
     vi.mocked(mockConfig.getIdeMode).mockReturnValue(true);
     vi.mocked(mockConfig.getIdeClient).mockReturnValue({
       getCurrentIde: () => DetectedIde.VSCode,
@@ -85,7 +82,6 @@ describe('ideCommand', () => {
   describe('status subcommand', () => {
     const mockGetConnectionStatus = vi.fn();
     beforeEach(() => {
-      vi.mocked(mockConfig.getIdeModeFeature).mockReturnValue(true);
       vi.mocked(mockConfig.getIdeClient).mockReturnValue({
         getConnectionStatus: mockGetConnectionStatus,
         getCurrentIde: () => DetectedIde.VSCode,
@@ -162,7 +158,6 @@ describe('ideCommand', () => {
   describe('install subcommand', () => {
     const mockInstall = vi.fn();
     beforeEach(() => {
-      vi.mocked(mockConfig.getIdeModeFeature).mockReturnValue(true);
       vi.mocked(mockConfig.getIdeMode).mockReturnValue(true);
       vi.mocked(mockConfig.getIdeClient).mockReturnValue({
         getCurrentIde: () => DetectedIde.VSCode,
diff --git a/packages/cli/src/ui/commands/ideCommand.ts b/packages/cli/src/ui/commands/ideCommand.ts
index 23af2e48..2dfad33c 100644
--- a/packages/cli/src/ui/commands/ideCommand.ts
+++ b/packages/cli/src/ui/commands/ideCommand.ts
@@ -115,7 +115,7 @@ async function getIdeStatusMessageWithFiles(ideClient: IdeClient): Promise<{
 }
 
 export const ideCommand = (config: Config | null): SlashCommand | null => {
-  if (!config || !config.getIdeModeFeature()) {
+  if (!config) {
     return null;
   }
   const ideClient = config.getIdeClient();
diff --git a/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx b/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx
index a8813491..2f93609e 100644
--- a/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx
+++ b/packages/cli/src/ui/components/messages/ToolConfirmationMessage.tsx
@@ -45,7 +45,7 @@ export const ToolConfirmationMessage: React.FC<
   const handleConfirm = async (outcome: ToolConfirmationOutcome) => {
     if (confirmationDetails.type === 'edit') {
       const ideClient = config?.getIdeClient();
-      if (config?.getIdeMode() && config?.getIdeModeFeature()) {
+      if (config?.getIdeMode()) {
         const cliOutcome =
           outcome === ToolConfirmationOutcome.Cancel ? 'rejected' : 'accepted';
         await ideClient?.resolveDiffFromCli(
@@ -136,7 +136,7 @@ export const ToolConfirmationMessage: React.FC<
         value: ToolConfirmationOutcome.ProceedAlways,
       },
     );
-    if (config?.getIdeMode() && config?.getIdeModeFeature()) {
+    if (config?.getIdeMode()) {
       options.push({
         label: 'No (esc)',
         value: ToolConfirmationOutcome.Cancel,
diff --git a/packages/core/src/config/config.ts b/packages/core/src/config/config.ts
index d02e4153..9231f427 100644
--- a/packages/core/src/config/config.ts
+++ b/packages/core/src/config/config.ts
@@ -191,7 +191,6 @@ export interface ConfigParameters {
   blockedMcpServers?: Array<{ name: string; extensionName: string }>;
   noBrowser?: boolean;
   summarizeToolOutput?: Record<string, SummarizeToolOutputSettings>;
-  ideModeFeature?: boolean;
   folderTrustFeature?: boolean;
   folderTrust?: boolean;
   ideMode?: boolean;
@@ -240,7 +239,6 @@ export class Config {
   private readonly model: string;
   private readonly extensionContextFilePaths: string[];
   private readonly noBrowser: boolean;
-  private readonly ideModeFeature: boolean;
   private readonly folderTrustFeature: boolean;
   private readonly folderTrust: boolean;
   private ideMode: boolean;
@@ -317,7 +315,6 @@ export class Config {
     this._blockedMcpServers = params.blockedMcpServers ?? [];
     this.noBrowser = params.noBrowser ?? false;
     this.summarizeToolOutput = params.summarizeToolOutput;
-    this.ideModeFeature = params.ideModeFeature ?? false;
     this.folderTrustFeature = params.folderTrustFeature ?? false;
     this.folderTrust = params.folderTrust ?? false;
     this.ideMode = params.ideMode ?? false;
@@ -654,10 +651,6 @@ export class Config {
     return this.summarizeToolOutput;
   }
 
-  getIdeModeFeature(): boolean {
-    return this.ideModeFeature;
-  }
-
   getIdeMode(): boolean {
     return this.ideMode;
   }
diff --git a/packages/core/src/core/client.test.ts b/packages/core/src/core/client.test.ts
index 4c6f6dbb..5e68cfb6 100644
--- a/packages/core/src/core/client.test.ts
+++ b/packages/core/src/core/client.test.ts
@@ -667,7 +667,7 @@ describe('Gemini Client (client.ts)', () => {
   });
 
   describe('sendMessageStream', () => {
-    it('should include editor context when ideModeFeature is enabled', async () => {
+    it('should include editor context when ideMode is enabled', async () => {
       // Arrange
       vi.mocked(ideContext.getIdeContext).mockReturnValue({
         workspaceState: {
@@ -691,7 +691,7 @@ describe('Gemini Client (client.ts)', () => {
         },
       });
 
-      vi.spyOn(client['config'], 'getIdeModeFeature').mockReturnValue(true);
+      vi.spyOn(client['config'], 'getIdeMode').mockReturnValue(true);
 
       const mockStream = (async function* () {
         yield { type: 'content', value: 'Hello' };
@@ -751,7 +751,7 @@ ${JSON.stringify(
       });
     });
 
-    it('should not add context if ideModeFeature is enabled but no open files', async () => {
+    it('should not add context if ideMode is enabled but no open files', async () => {
       // Arrange
       vi.mocked(ideContext.getIdeContext).mockReturnValue({
         workspaceState: {
@@ -759,7 +759,7 @@ ${JSON.stringify(
         },
       });
 
-      vi.spyOn(client['config'], 'getIdeModeFeature').mockReturnValue(true);
+      vi.spyOn(client['config'], 'getIdeMode').mockReturnValue(true);
 
       const mockStream = (async function* () {
         yield { type: 'content', value: 'Hello' };
@@ -798,7 +798,7 @@ ${JSON.stringify(
       );
     });
 
-    it('should add context if ideModeFeature is enabled and there is one active file', async () => {
+    it('should add context if ideMode is enabled and there is one active file', async () => {
       // Arrange
       vi.mocked(ideContext.getIdeContext).mockReturnValue({
         workspaceState: {
@@ -814,7 +814,7 @@ ${JSON.stringify(
         },
       });
 
-      vi.spyOn(client['config'], 'getIdeModeFeature').mockReturnValue(true);
+      vi.spyOn(client['config'], 'getIdeMode').mockReturnValue(true);
 
       const mockStream = (async function* () {
         yield { type: 'content', value: 'Hello' };
@@ -873,7 +873,7 @@ ${JSON.stringify(
       });
     });
 
-    it('should add context if ideModeFeature is enabled and there are open files but no active file', async () => {
+    it('should add context if ideMode is enabled and there are open files but no active file', async () => {
       // Arrange
       vi.mocked(ideContext.getIdeContext).mockReturnValue({
         workspaceState: {
@@ -890,7 +890,7 @@ ${JSON.stringify(
         },
       });
 
-      vi.spyOn(client['config'], 'getIdeModeFeature').mockReturnValue(true);
+      vi.spyOn(client['config'], 'getIdeMode').mockReturnValue(true);
 
       const mockStream = (async function* () {
         yield { type: 'content', value: 'Hello' };
@@ -1226,7 +1226,7 @@ ${JSON.stringify(
       beforeEach(() => {
         client['forceFullIdeContext'] = false; // Reset before each delta test
         vi.spyOn(client, 'tryCompressChat').mockResolvedValue(null);
-        vi.spyOn(client['config'], 'getIdeModeFeature').mockReturnValue(true);
+        vi.spyOn(client['config'], 'getIdeMode').mockReturnValue(true);
         mockTurnRunFn.mockReturnValue(mockStream);
 
         const mockChat: Partial<GeminiChat> = {
diff --git a/packages/core/src/core/client.ts b/packages/core/src/core/client.ts
index cc492472..96be4111 100644
--- a/packages/core/src/core/client.ts
+++ b/packages/core/src/core/client.ts
@@ -444,7 +444,7 @@ export class GeminiClient {
       yield { type: GeminiEventType.ChatCompressed, value: compressed };
     }
 
-    if (this.config.getIdeModeFeature() && this.config.getIdeMode()) {
+    if (this.config.getIdeMode()) {
       const { contextParts, newIdeContext } = this.getIdeContextParts(
         this.forceFullIdeContext || this.getHistory().length === 0,
       );
diff --git a/packages/core/src/ide/ide-installer.ts b/packages/core/src/ide/ide-installer.ts
index 7db8e2d2..121e0089 100644
--- a/packages/core/src/ide/ide-installer.ts
+++ b/packages/core/src/ide/ide-installer.ts
@@ -6,15 +6,12 @@
 
 import * as child_process from 'child_process';
 import * as process from 'process';
-import { glob } from 'glob';
 import * as path from 'path';
 import * as fs from 'fs';
 import * as os from 'os';
-import { fileURLToPath } from 'url';
 import { DetectedIde } from './detect-ide.js';
 
 const VSCODE_COMMAND = process.platform === 'win32' ? 'code.cmd' : 'code';
-const VSCODE_COMPANION_EXTENSION_FOLDER = 'vscode-ide-companion';
 
 export interface IdeInstaller {
   install(): Promise<InstallResult>;
@@ -103,34 +100,7 @@ class VsCodeInstaller implements IdeInstaller {
       };
     }
 
-    const bundleDir = path.dirname(fileURLToPath(import.meta.url));
-    // The VSIX file is copied to the bundle directory as part of the build.
-    let vsixFiles = glob.sync(path.join(bundleDir, '*.vsix'));
-    if (vsixFiles.length === 0) {
-      // If the VSIX file is not in the bundle, it might be a dev
-      // environment running with `npm start`. Look for it in the original
-      // package location, relative to the bundle dir.
-      const devPath = path.join(
-        bundleDir, // .../packages/core/dist/src/ide
-        '..', // .../packages/core/dist/src
-        '..', // .../packages/core/dist
-        '..', // .../packages/core
-        '..', // .../packages
-        VSCODE_COMPANION_EXTENSION_FOLDER,
-        '*.vsix',
-      );
-      vsixFiles = glob.sync(devPath);
-    }
-    if (vsixFiles.length === 0) {
-      return {
-        success: false,
-        message:
-          'Could not find the required VS Code companion extension. Please file a bug via /bug.',
-      };
-    }
-
-    const vsixPath = vsixFiles[0];
-    const command = `"${commandPath}" --install-extension "${vsixPath}" --force`;
+    const command = `"${commandPath}" --install-extension google.gemini-cli-vscode-ide-companion --force`;
     try {
       child_process.execSync(command, { stdio: 'pipe' });
       return {
diff --git a/packages/core/src/tools/edit.test.ts b/packages/core/src/tools/edit.test.ts
index 3e0dba61..b2e31fdd 100644
--- a/packages/core/src/tools/edit.test.ts
+++ b/packages/core/src/tools/edit.test.ts
@@ -62,7 +62,6 @@ describe('EditTool', () => {
       getWorkspaceContext: () => createMockWorkspaceContext(rootDir),
       getIdeClient: () => undefined,
       getIdeMode: () => false,
-      getIdeModeFeature: () => false,
       // getGeminiConfig: () => ({ apiKey: 'test-api-key' }), // This was not a real Config method
       // Add other properties/methods of Config if EditTool uses them
       // Minimal other methods to satisfy Config type if needed by EditTool constructor or other direct uses:
@@ -810,7 +809,6 @@ describe('EditTool', () => {
         }),
       };
       (mockConfig as any).getIdeMode = () => true;
-      (mockConfig as any).getIdeModeFeature = () => true;
       (mockConfig as any).getIdeClient = () => ideClient;
     });
 
diff --git a/packages/core/src/tools/edit.ts b/packages/core/src/tools/edit.ts
index 86641300..e2b517cf 100644
--- a/packages/core/src/tools/edit.ts
+++ b/packages/core/src/tools/edit.ts
@@ -250,7 +250,6 @@ class EditToolInvocation implements ToolInvocation<EditToolParams, ToolResult> {
     );
     const ideClient = this.config.getIdeClient();
     const ideConfirmation =
-      this.config.getIdeModeFeature() &&
       this.config.getIdeMode() &&
       ideClient?.getConnectionStatus().status === IDEConnectionStatus.Connected
         ? ideClient.openDiff(this.params.file_path, editData.newContent)
diff --git a/packages/core/src/tools/write-file.test.ts b/packages/core/src/tools/write-file.test.ts
index 1967b99b..06561602 100644
--- a/packages/core/src/tools/write-file.test.ts
+++ b/packages/core/src/tools/write-file.test.ts
@@ -58,7 +58,6 @@ const mockConfigInternal = {
   getGeminiClient: vi.fn(), // Initialize as a plain mock function
   getIdeClient: vi.fn(),
   getIdeMode: vi.fn(() => false),
-  getIdeModeFeature: vi.fn(() => false),
   getWorkspaceContext: () => createMockWorkspaceContext(rootDir),
   getApiKey: () => 'test-key',
   getModel: () => 'test-model',
diff --git a/packages/core/src/tools/write-file.ts b/packages/core/src/tools/write-file.ts
index 5cdba419..72aeba6d 100644
--- a/packages/core/src/tools/write-file.ts
+++ b/packages/core/src/tools/write-file.ts
@@ -195,7 +195,6 @@ export class WriteFileTool
 
     const ideClient = this.config.getIdeClient();
     const ideConfirmation =
-      this.config.getIdeModeFeature() &&
       this.config.getIdeMode() &&
       ideClient.getConnectionStatus().status === IDEConnectionStatus.Connected
         ? ideClient.openDiff(params.file_path, correctedContent)
diff --git a/scripts/copy_bundle_assets.js b/scripts/copy_bundle_assets.js
index 79d2a080..5a3af3e9 100644
--- a/scripts/copy_bundle_assets.js
+++ b/scripts/copy_bundle_assets.js
@@ -37,12 +37,4 @@ for (const file of sbFiles) {
   copyFileSync(join(root, file), join(bundleDir, basename(file)));
 }
 
-// Find and copy all .vsix files from packages to the root of the bundle directory
-const vsixFiles = glob.sync('packages/vscode-ide-companion/*.vsix', {
-  cwd: root,
-});
-for (const file of vsixFiles) {
-  copyFileSync(join(root, file), join(bundleDir, basename(file)));
-}
-
 console.log('Assets copied to bundle/');