fix(core/cli): resolve build errors and integrate SubagentActivity event #18267

packages/cli/src/config/settingsSchema.ts

@@ -1528,6 +1528,15 @@ const SETTINGS_SCHEMA = {
           'Enable local and remote subagents. Warning: Experimental feature, uses YOLO mode for subagents',
         showInDialog: false,
       },
+      enableAgentHarness: {
+        type: 'boolean',
+        label: 'Enable Agent Harness',
+        category: 'Experimental',
+        requiresRestart: true,
+        default: false,
+        description: 'Enable the new unified agent harness (experimental).',
+        showInDialog: false,
+      },
       extensionManagement: {
         type: 'boolean',
         label: 'Extension Management',

packages/cli/src/ui/hooks/useGeminiStream.ts

@@ -1168,6 +1168,9 @@ export const useGeminiStream = (
           case ServerGeminiEventType.InvalidStream:
             // Will add the missing logic later
             break;
+          case ServerGeminiEventType.SubagentActivity:
+            // TODO: UI implementation for subagent activity
+            break;
           default: {
             // enforces exhaustive switch-case
             const unreachable: never = event;