Fix #1416

- Add platform.ts utility with isWindows constant
- Fix Windows PowerShell execution with & call operator
- Fix macOS Electron helper with ELECTRON_RUN_AS_NODE=1
- Prefer system Node.js, fallback to VS Code runtime
- Refactor platform detection in acpMessageHandler and acpSessionManager

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/vscode-ide-companion/src/extension.ts

@@ -17,11 +17,25 @@ import {
 import { WebViewProvider } from './webview/WebViewProvider.js';
 import { registerNewCommands } from './commands/index.js';
 import { ReadonlyFileSystemProvider } from './services/readonlyFileSystemProvider.js';
+import { isWindows } from './utils/platform.js';
+import { execSync } from 'child_process';
 
 const CLI_IDE_COMPANION_IDENTIFIER = 'qwenlm.qwen-code-vscode-ide-companion';
 const INFO_MESSAGE_SHOWN_KEY = 'qwenCodeInfoMessageShown';
 export const DIFF_SCHEME = 'qwen-diff';
 
+/**
+ * Check if Node.js is available in the system PATH
+ */
+function isNodeAvailable(): boolean {
+  try {
+    execSync(isWindows ? 'where node' : 'which node', { stdio: 'ignore' });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
 /**
  * IDE environments where the installation greeting is hidden.  In these
  * environments we either are pre-installed and the installation message is
@@ -312,8 +326,27 @@ export async function activate(context: vscode.ExtensionContext) {
             'qwen-cli',
             'cli.js',
           ).fsPath;
-          const quote = (s: string) => `"${s.replaceAll('"', '\\"')}"`;
-          const qwenCmd = `${quote(process.execPath)} ${quote(cliEntry)}`;
+          const quote = (s: string) => `"${s.replace(/"/g, '\\"')}"`;
+
+          let qwenCmd: string;
+          if (isNodeAvailable()) {
+            // Prefer system Node.js
+            qwenCmd = `node ${quote(cliEntry)}`;
+          } else {
+            // Fallback to VS Code's bundled Node.js runtime
+            const execPath = process.execPath;
+            const baseCmd = `${quote(execPath)} ${quote(cliEntry)}`;
+            if (isWindows) {
+              // PowerShell requires & call operator for quoted paths
+              qwenCmd = `& ${baseCmd}`;
+            } else if (execPath.toLowerCase().includes('code helper')) {
+              // macOS Electron helper needs ELECTRON_RUN_AS_NODE=1; add -i to force TUI mode
+              qwenCmd = `ELECTRON_RUN_AS_NODE=1 ${baseCmd} -i`;
+            } else {
+              qwenCmd = baseCmd;
+            }
+          }
+
           const terminal = vscode.window.createTerminal({
             name: `Qwen Code (${selectedFolder.name})`,
             cwd: selectedFolder.uri.fsPath,

packages/vscode-ide-companion/src/services/acpMessageHandler.ts

@@ -26,6 +26,7 @@ import type {
 } from '../types/connectionTypes.js';
 import { AcpFileHandler } from '../services/acpFileHandler.js';
 import type { ChildProcess } from 'child_process';
+import { isWindows } from '../utils/platform.js';
 
 /**
  * ACP Message Handler Class
@@ -47,7 +48,7 @@ export class AcpMessageHandler {
   sendResponseMessage(child: ChildProcess | null, response: AcpResponse): void {
     if (child?.stdin) {
       const jsonString = JSON.stringify(response);
-      const lineEnding = process.platform === 'win32' ? '\r\n' : '\n';
+      const lineEnding = isWindows ? '\r\n' : '\n';
       child.stdin.write(jsonString + lineEnding);
     }
   }

packages/vscode-ide-companion/src/services/acpSessionManager.ts

@@ -19,6 +19,7 @@ import type { ApprovalModeValue } from '../types/approvalModeValueTypes.js';
 import { AGENT_METHODS } from '../constants/acpSchema.js';
 import type { PendingRequest } from '../types/connectionTypes.js';
 import type { ChildProcess } from 'child_process';
+import { isWindows } from '../utils/platform.js';
 
 /**
  * ACP Session Manager Class
@@ -102,7 +103,7 @@ export class AcpSessionManager {
   ): void {
     if (child?.stdin) {
       const jsonString = JSON.stringify(message);
-      const lineEnding = process.platform === 'win32' ? '\r\n' : '\n';
+      const lineEnding = isWindows ? '\r\n' : '\n';
       child.stdin.write(jsonString + lineEnding);
     }
   }

packages/vscode-ide-companion/src/utils/platform.ts

@@ -0,0 +1,8 @@
+/**
+ * @license
+ * Copyright 2025 Qwen Team
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/** Whether the current platform is Windows */
+export const isWindows = process.platform === 'win32';