feat(workspaces): transform workspaces feature into a distributable extension

extensions/workspaces/scripts/providers/ProviderFactory.ts

@@ -0,0 +1,20 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { GceCosProvider } from './GceCosProvider.ts';
+import { WorkspaceProvider } from './BaseProvider.ts';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const REPO_ROOT = path.resolve(__dirname, '../../../../..');
+
+export class ProviderFactory {
+  static getProvider(config: { projectId: string; zone: string; instanceName: string }): WorkspaceProvider {
+    // Currently we only have GceCosProvider, but this is where we'd branch
+    return new GceCosProvider(config.projectId, config.zone, config.instanceName, REPO_ROOT);
+  }
+}