diff --git a/packages/cli/src/ui/App.tsx b/packages/cli/src/ui/App.tsx
index aff3fac3..c4f67294 100644
--- a/packages/cli/src/ui/App.tsx
+++ b/packages/cli/src/ui/App.tsx
@@ -939,8 +939,7 @@ const App = ({ config, settings, startupWarnings = [], version }: AppProps) => {
 
           {shouldShowIdePrompt ? (
             <IdeIntegrationNudge
-              question="Do you want to connect your VS Code editor to Gemini CLI?"
-              description="If you select Yes, we'll install an extension that allows the CLI to access your open files and display diffs directly in VS Code."
+              ideName={config.getIdeClient().getDetectedIdeDisplayName()}
               onComplete={handleIdePromptComplete}
             />
           ) : isFolderTrustDialogOpen ? (
diff --git a/packages/cli/src/ui/IdeIntegrationNudge.tsx b/packages/cli/src/ui/IdeIntegrationNudge.tsx
index 72cd1756..f0c6172d 100644
--- a/packages/cli/src/ui/IdeIntegrationNudge.tsx
+++ b/packages/cli/src/ui/IdeIntegrationNudge.tsx
@@ -13,14 +13,12 @@ import {
 export type IdeIntegrationNudgeResult = 'yes' | 'no' | 'dismiss';
 
 interface IdeIntegrationNudgeProps {
-  question: string;
-  description?: string;
+  ideName?: string;
   onComplete: (result: IdeIntegrationNudgeResult) => void;
 }
 
 export function IdeIntegrationNudge({
-  question,
-  description,
+  ideName,
   onComplete,
 }: IdeIntegrationNudgeProps) {
   useInput((_input, key) => {
@@ -56,9 +54,11 @@ export function IdeIntegrationNudge({
       <Box marginBottom={1} flexDirection="column">
         <Text>
           <Text color="yellow">{'> '}</Text>
-          {question}
+          {`Do you want to connect your ${ideName ?? 'your'} editor to Gemini CLI?`}
         </Text>
-        {description && <Text dimColor>{description}</Text>}
+        <Text
+          dimColor
+        >{`If you select Yes, we'll install an extension that allows the CLI to access your open files and display diffs directly in ${ideName ?? 'your editor'}.`}</Text>
       </Box>
       <RadioButtonSelect
         items={OPTIONS}
diff --git a/packages/core/src/ide/detect-ide.ts b/packages/core/src/ide/detect-ide.ts
index f3d8cc63..759c4103 100644
--- a/packages/core/src/ide/detect-ide.ts
+++ b/packages/core/src/ide/detect-ide.ts
@@ -6,12 +6,33 @@
 
 export enum DetectedIde {
   VSCode = 'vscode',
+  VSCodium = 'vscodium',
+  Cursor = 'cursor',
+  CloudShell = 'cloudshell',
+  Codespaces = 'codespaces',
+  Windsurf = 'windsurf',
+  FirebaseStudio = 'firebasestudio',
+  Trae = 'trae',
 }
 
 export function getIdeDisplayName(ide: DetectedIde): string {
   switch (ide) {
     case DetectedIde.VSCode:
       return 'VS Code';
+    case DetectedIde.VSCodium:
+      return 'VSCodium';
+    case DetectedIde.Cursor:
+      return 'Cursor';
+    case DetectedIde.CloudShell:
+      return 'Cloud Shell';
+    case DetectedIde.Codespaces:
+      return 'GitHub Codespaces';
+    case DetectedIde.Windsurf:
+      return 'Windsurf';
+    case DetectedIde.FirebaseStudio:
+      return 'Firebase Studio';
+    case DetectedIde.Trae:
+      return 'Trae';
     default: {
       // This ensures that if a new IDE is added to the enum, we get a compile-time error.
       const exhaustiveCheck: never = ide;
@@ -21,8 +42,24 @@ export function getIdeDisplayName(ide: DetectedIde): string {
 }
 
 export function detectIde(): DetectedIde | undefined {
-  if (process.env.TERM_PROGRAM === 'vscode') {
-    return DetectedIde.VSCode;
+  // Only VSCode-based integrations are currently supported.
+  if (process.env.TERM_PROGRAM !== 'vscode') {
+    return undefined;
   }
-  return undefined;
+  if (process.env.CURSOR_TRACE_ID) {
+    return DetectedIde.Cursor;
+  }
+  if (process.env.CODESPACES) {
+    return DetectedIde.Codespaces;
+  }
+  if (process.env.EDITOR_IN_CLOUD_SHELL) {
+    return DetectedIde.CloudShell;
+  }
+  if (process.env.TERM_PRODUCT === 'Trae') {
+    return DetectedIde.Trae;
+  }
+  if (process.env.FIREBASE_DEPLOY_AGENT) {
+    return DetectedIde.FirebaseStudio;
+  }
+  return DetectedIde.VSCode;
 }
diff --git a/packages/core/src/ide/ide-installer.test.ts b/packages/core/src/ide/ide-installer.test.ts
index 698c3173..1afd7a36 100644
--- a/packages/core/src/ide/ide-installer.test.ts
+++ b/packages/core/src/ide/ide-installer.test.ts
@@ -24,9 +24,17 @@ describe('ide-installer', () => {
       expect(installer).toBeInstanceOf(Object);
     });
 
-    it('should return null for an unknown IDE', () => {
+    it('should return an OpenVSXInstaller for "vscodium"', () => {
+      const installer = getIdeInstaller(DetectedIde.VSCodium);
+      expect(installer).not.toBeNull();
+      expect(installer).toBeInstanceOf(Object);
+    });
+
+    it('should return a DefaultIDEInstaller for an unknown IDE', () => {
       const installer = getIdeInstaller('unknown' as DetectedIde);
-      expect(installer).toBeNull();
+      // Assuming DefaultIDEInstaller is the fallback
+      expect(installer).not.toBeNull();
+      expect(installer).toBeInstanceOf(Object);
     });
   });
 
@@ -59,4 +67,44 @@ describe('ide-installer', () => {
       });
     });
   });
+
+  describe('OpenVSXInstaller', () => {
+    let installer: IdeInstaller;
+
+    beforeEach(() => {
+      installer = getIdeInstaller(DetectedIde.VSCodium)!;
+    });
+
+    afterEach(() => {
+      vi.restoreAllMocks();
+    });
+
+    describe('install', () => {
+      it('should call execSync with the correct command and return success', async () => {
+        const execSyncSpy = vi
+          .spyOn(child_process, 'execSync')
+          .mockImplementation(() => '');
+        const result = await installer.install();
+        expect(execSyncSpy).toHaveBeenCalledWith(
+          'npx ovsx get google.gemini-cli-vscode-ide-companion',
+          { stdio: 'pipe' },
+        );
+        expect(result.success).toBe(true);
+        expect(result.message).toContain(
+          'VS Code companion extension was installed successfully from OpenVSX',
+        );
+      });
+
+      it('should return a failure message on failed installation', async () => {
+        vi.spyOn(child_process, 'execSync').mockImplementation(() => {
+          throw new Error('Command failed');
+        });
+        const result = await installer.install();
+        expect(result.success).toBe(false);
+        expect(result.message).toContain(
+          'Failed to install VS Code companion extension from OpenVSX',
+        );
+      });
+    });
+  });
 });
diff --git a/packages/core/src/ide/ide-installer.ts b/packages/core/src/ide/ide-installer.ts
index 7db8e2d2..e6192bfa 100644
--- a/packages/core/src/ide/ide-installer.ts
+++ b/packages/core/src/ide/ide-installer.ts
@@ -147,11 +147,31 @@ class VsCodeInstaller implements IdeInstaller {
   }
 }
 
+class OpenVSXInstaller implements IdeInstaller {
+  async install(): Promise<InstallResult> {
+    // TODO: Use the correct extension path.
+    const command = `npx ovsx get google.gemini-cli-vscode-ide-companion`;
+    try {
+      child_process.execSync(command, { stdio: 'pipe' });
+      return {
+        success: true,
+        message:
+          'VS Code companion extension was installed successfully from OpenVSX. Please restart your terminal to complete the setup.',
+      };
+    } catch (_error) {
+      return {
+        success: false,
+        message: `Failed to install VS Code companion extension from OpenVSX. Please try installing it manually.`,
+      };
+    }
+  }
+}
+
 export function getIdeInstaller(ide: DetectedIde): IdeInstaller | null {
   switch (ide) {
     case DetectedIde.VSCode:
       return new VsCodeInstaller();
     default:
-      return null;
+      return new OpenVSXInstaller();
   }
 }