feat(config): add isModelAvailabilityServiceEnabled setting (#13777)

packages/cli/src/config/config.ts

@@ -636,6 +636,8 @@ export async function loadCliConfig(
     enabledExtensions: argv.extensions,
     extensionLoader: extensionManager,
     enableExtensionReloading: settings.experimental?.extensionReloading,
+    enableModelAvailabilityService:
+      settings.experimental?.isModelAvailabilityServiceEnabled,
     noBrowser: !!process.env['NO_BROWSER'],
     summarizeToolOutput: settings.model?.summarizeToolOutput,
     ideMode,

packages/cli/src/config/settingsSchema.test.ts

@@ -345,6 +345,21 @@ describe('SettingsSchema', () => {
         getSettingsSchema().general.properties.previewFeatures.description,
       ).toBe('Enable preview features (e.g., preview models).');
     });
+
+    it('should have isModelAvailabilityServiceEnabled setting in schema', () => {
+      const setting =
+        getSettingsSchema().experimental.properties
+          .isModelAvailabilityServiceEnabled;
+      expect(setting).toBeDefined();
+      expect(setting.type).toBe('boolean');
+      expect(setting.category).toBe('Experimental');
+      expect(setting.default).toBe(false);
+      expect(setting.requiresRestart).toBe(true);
+      expect(setting.showInDialog).toBe(false);
+      expect(setting.description).toBe(
+        'Enable model routing using new availability service.',
+      );
+    });
   });
 
   it('has JSON schema definitions for every referenced ref', () => {

packages/cli/src/config/settingsSchema.ts

@@ -1291,6 +1291,15 @@ const SETTINGS_SCHEMA = {
           'Enables extension loading/unloading within the CLI session.',
         showInDialog: false,
       },
+      isModelAvailabilityServiceEnabled: {
+        type: 'boolean',
+        label: 'Enable Model Availability Service',
+        category: 'Experimental',
+        requiresRestart: true,
+        default: false,
+        description: 'Enable model routing using new availability service.',
+        showInDialog: false,
+      },
       codebaseInvestigatorSettings: {
         type: 'object',
         label: 'Codebase Investigator Settings',