feat(cli): add streamlined gemini gemma local model setup (#25498)

Co-authored-by: Abhijit Balaji <abhijitbalaji@google.com>
Co-authored-by: Samee Zahid <sameez@google.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/cli/src/ui/commands/gemmaStatusCommand.ts

@@ -0,0 +1,41 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { CommandKind, type SlashCommand } from './types.js';
+import { MessageType, type HistoryItemGemmaStatus } from '../types.js';
+import { checkGemmaStatus } from '../../commands/gemma/status.js';
+import { GEMMA_MODEL_NAME } from '../../commands/gemma/constants.js';
+
+export const gemmaStatusCommand: SlashCommand = {
+  name: 'gemma',
+  description: 'Check local Gemma model routing status',
+  kind: CommandKind.BUILT_IN,
+  autoExecute: true,
+  isSafeConcurrent: true,
+  action: async (context) => {
+    const port =
+      parseInt(
+        context.services.settings.merged.experimental?.gemmaModelRouter?.classifier?.host?.match(
+          /:(\d+)/,
+        )?.[1] ?? '',
+        10,
+      ) || undefined;
+    const status = await checkGemmaStatus(port);
+    const item: Omit<HistoryItemGemmaStatus, 'id'> = {
+      type: MessageType.GEMMA_STATUS,
+      binaryInstalled: status.binaryInstalled,
+      binaryPath: status.binaryPath,
+      modelName: GEMMA_MODEL_NAME,
+      modelDownloaded: status.modelDownloaded,
+      serverRunning: status.serverRunning,
+      serverPid: status.serverPid,
+      serverPort: status.port,
+      settingsEnabled: status.settingsEnabled,
+      allPassing: status.allPassing,
+    };
+    context.ui.addItem(item);
+  },
+};