3 files changed, 11 insertions, 2 deletions
diff --git a/packages/core/src/ide/constants.ts b/packages/core/src/ide/constants.ts
new file mode 100644
index 00000000..f1f066c4
--- /dev/null
+++ b/packages/core/src/ide/constants.ts
@@ -0,0 +1,7 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+export const GEMINI_CLI_COMPANION_EXTENSION_NAME = 'Gemini CLI Companion';
diff --git a/packages/core/src/ide/ide-installer.ts b/packages/core/src/ide/ide-installer.ts
index 121e0089..7b9ead77 100644
--- a/packages/core/src/ide/ide-installer.ts
+++ b/packages/core/src/ide/ide-installer.ts
@@ -10,6 +10,7 @@ import * as path from 'path';
 import * as fs from 'fs';
 import * as os from 'os';
 import { DetectedIde } from './detect-ide.js';
+import { GEMINI_CLI_COMPANION_EXTENSION_NAME } from './constants.js';
 
 const VSCODE_COMMAND = process.platform === 'win32' ? 'code.cmd' : 'code';
 
@@ -96,7 +97,7 @@ class VsCodeInstaller implements IdeInstaller {
     if (!commandPath) {
       return {
         success: false,
-        message: `VS Code CLI not found. Please ensure 'code' is in your system's PATH. For help, see https://code.visualstudio.com/docs/configure/command-line#_code-is-not-recognized-as-an-internal-or-external-command. You can also install the companion extension manually from the VS Code marketplace.`,
+        message: `VS Code CLI not found. Please ensure 'code' is in your system's PATH. For help, see https://code.visualstudio.com/docs/configure/command-line#_code-is-not-recognized-as-an-internal-or-external-command. You can also install the '${GEMINI_CLI_COMPANION_EXTENSION_NAME}' extension manually from the VS Code marketplace.`,
       };
     }
 
@@ -111,7 +112,7 @@ class VsCodeInstaller implements IdeInstaller {
     } catch (_error) {
       return {
         success: false,
-        message: `Failed to install VS Code companion extension. Please try installing it manually from the VS Code marketplace.`,
+        message: `Failed to install VS Code companion extension. Please try installing '${GEMINI_CLI_COMPANION_EXTENSION_NAME}' manually from the VS Code extension marketplace.`,
       };
     }
   }
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index a24cddbe..e2cefddd 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -52,6 +52,7 @@ export * from './ide/ide-client.js';
 export * from './ide/ideContext.js';
 export * from './ide/ide-installer.js';
 export { getIdeInfo, DetectedIde, IdeInfo } from './ide/detect-ide.js';
+export * from './ide/constants.js';
 
 // Export Shell Execution Service
 export * from './services/shellExecutionService.js';