[extensions] Add disable command (#7001)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

packages/cli/src/commands/extensions/disable.ts

@@ -0,0 +1,51 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { type CommandModule } from 'yargs';
+import { disableExtension } from '../../config/extension.js';
+import { SettingScope } from '../../config/settings.js';
+import { getErrorMessage } from '../../utils/errors.js';
+
+interface DisableArgs {
+  name: string;
+  scope: SettingScope;
+}
+
+export async function handleDisable(args: DisableArgs) {
+  try {
+    disableExtension(args.name, args.scope);
+    console.log(
+      `Extension "${args.name}" successfully disabled for scope "${args.scope}".`,
+    );
+  } catch (error) {
+    console.error(getErrorMessage(error));
+    process.exit(1);
+  }
+}
+
+export const disableCommand: CommandModule = {
+  command: 'disable [--scope] <name>',
+  describe: 'Disables an extension.',
+  builder: (yargs) =>
+    yargs
+      .positional('name', {
+        describe: 'The name of the extension to disable.',
+        type: 'string',
+      })
+      .option('scope', {
+        describe: 'The scope to disable the extenison in.',
+        type: 'string',
+        default: SettingScope.User,
+        choices: [SettingScope.User, SettingScope.Workspace],
+      })
+      .check((_argv) => true),
+  handler: async (argv) => {
+    await handleDisable({
+      name: argv['name'] as string,
+      scope: argv['scope'] as SettingScope,
+    });
+  },
+};