feat(plugin): support enterprise extension (#861)

electron/extensions/builtin/clawhub-marketplace.ts

@@ -0,0 +1,43 @@
+import type {
+  Extension,
+  ExtensionContext,
+  MarketplaceProviderExtension,
+  MarketplaceCapability,
+} from '../types';
+import type {
+  ClawHubSearchParams,
+  ClawHubInstallParams,
+  ClawHubSkillResult,
+} from '../../gateway/clawhub';
+
+class ClawHubMarketplaceExtension implements MarketplaceProviderExtension {
+  readonly id = 'builtin/clawhub-marketplace';
+
+  setup(_ctx: ExtensionContext): void {
+    // No setup needed -- search/install delegates to the ClawHubService CLI runner
+  }
+
+  async getCapability(): Promise<MarketplaceCapability> {
+    return {
+      mode: 'clawhub',
+      canSearch: true,
+      canInstall: true,
+    };
+  }
+
+  async search(params: ClawHubSearchParams): Promise<ClawHubSkillResult[]> {
+    const { ClawHubService } = await import('../../gateway/clawhub');
+    const svc = new ClawHubService();
+    return svc.search(params);
+  }
+
+  async install(params: ClawHubInstallParams): Promise<void> {
+    const { ClawHubService } = await import('../../gateway/clawhub');
+    const svc = new ClawHubService();
+    return svc.install(params);
+  }
+}
+
+export function createClawHubMarketplaceExtension(): Extension {
+  return new ClawHubMarketplaceExtension();
+}