feat(plan): add experimental plan flag (#16650)

packages/cli/src/config/config.ts

@@ -706,6 +706,7 @@ export async function loadCliConfig(
     extensionLoader: extensionManager,
     enableExtensionReloading: settings.experimental?.extensionReloading,
     enableAgents: settings.experimental?.enableAgents,
+    plan: settings.experimental?.plan,
     skillsSupport: settings.experimental?.skills,
     disabledSkills: settings.skills?.disabled,
     experimentalJitContext: settings.experimental?.jitContext,

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

@@ -357,6 +357,19 @@ describe('SettingsSchema', () => {
       );
     });
 
+    it('should have plan setting in schema', () => {
+      const setting = getSettingsSchema().experimental.properties.plan;
+      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(true);
+      expect(setting.description).toBe(
+        'Enable planning features (Plan Mode and tools).',
+      );
+    });
+
     it('should have hooks.notifications setting in schema', () => {
       const setting = getSettingsSchema().hooks.properties.notifications;
       expect(setting).toBeDefined();

packages/cli/src/config/settingsSchema.ts

@@ -1540,6 +1540,15 @@ const SETTINGS_SCHEMA = {
           },
         },
       },
+      plan: {
+        type: 'boolean',
+        label: 'Plan',
+        category: 'Experimental',
+        requiresRestart: true,
+        default: false,
+        description: 'Enable planning features (Plan Mode and tools).',
+        showInDialog: true,
+      },
     },
   },