feat(cli): refactor model command to support set and manage subcommands (#19221)

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

@@ -4,14 +4,51 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+import {
+  ModelSlashCommandEvent,
+  logModelSlashCommand,
+} from '@google/gemini-cli-core';
 import {
   type CommandContext,
   CommandKind,
   type SlashCommand,
 } from './types.js';
+import { MessageType } from '../types.js';
 
-export const modelCommand: SlashCommand = {
-  name: 'model',
+const setModelCommand: SlashCommand = {
+  name: 'set',
+  description:
+    'Set the model to use. Usage: /model set <model-name> [--persist]',
+  kind: CommandKind.BUILT_IN,
+  autoExecute: false,
+  action: async (context: CommandContext, args: string) => {
+    const parts = args.trim().split(/\s+/).filter(Boolean);
+    if (parts.length === 0) {
+      context.ui.addItem({
+        type: MessageType.ERROR,
+        text: 'Usage: /model set <model-name> [--persist]',
+      });
+      return;
+    }
+
+    const modelName = parts[0];
+    const persist = parts.includes('--persist');
+
+    if (context.services.config) {
+      context.services.config.setModel(modelName, !persist);
+      const event = new ModelSlashCommandEvent(modelName);
+      logModelSlashCommand(context.services.config, event);
+
+      context.ui.addItem({
+        type: MessageType.INFO,
+        text: `Model set to ${modelName}${persist ? ' (persisted)' : ''}`,
+      });
+    }
+  },
+};
+
+const manageModelCommand: SlashCommand = {
+  name: 'manage',
   description: 'Opens a dialog to configure the model',
   kind: CommandKind.BUILT_IN,
   autoExecute: true,
@@ -25,3 +62,13 @@ export const modelCommand: SlashCommand = {
     };
   },
 };
+
+export const modelCommand: SlashCommand = {
+  name: 'model',
+  description: 'Manage model configuration',
+  kind: CommandKind.BUILT_IN,
+  autoExecute: false,
+  subCommands: [manageModelCommand, setModelCommand],
+  action: async (context: CommandContext, args: string) =>
+    manageModelCommand.action!(context, args),
+};