fix(cli): support legacy onConfirm callback in ToolActionsContext

Fixes a bug where custom slash commands using legacy confirmations would hang because the local onConfirm callback was ignored in favor of MessageBus publishing.

Author: SandyTao520

packages/cli/src/ui/contexts/ToolActionsContext.test.tsx

@@ -15,6 +15,7 @@ import {
   MessageBusType,
   IdeClient,
   CoreToolCallStatus,
+  type SerializableConfirmationDetails,
 } from '@google/gemini-cli-core';
 import { type IndividualToolCallDisplay } from '../types.js';
 
@@ -182,4 +183,44 @@ describe('ToolActionsContext', () => {
 
     expect(result.current.isDiffingEnabled).toBe(false);
   });
+
+  it('calls local onConfirm for tools without correlationId', async () => {
+    const mockOnConfirm = vi.fn().mockResolvedValue(undefined);
+    const legacyTool: IndividualToolCallDisplay = {
+      callId: 'legacy-call',
+      name: 'legacy-tool',
+      description: 'desc',
+      status: CoreToolCallStatus.AwaitingApproval,
+      resultDisplay: undefined,
+      confirmationDetails: {
+        type: 'exec',
+        title: 'exec',
+        command: 'ls',
+        rootCommand: 'ls',
+        rootCommands: ['ls'],
+        onConfirm: mockOnConfirm,
+      } as unknown as SerializableConfirmationDetails,
+    };
+
+    const { result } = renderHook(() => useToolActions(), {
+      wrapper: ({ children }) => (
+        <ToolActionsProvider config={mockConfig} toolCalls={[legacyTool]}>
+          {children}
+        </ToolActionsProvider>
+      ),
+    });
+
+    await act(async () => {
+      await result.current.confirm(
+        'legacy-call',
+        ToolConfirmationOutcome.ProceedOnce,
+      );
+    });
+
+    expect(mockOnConfirm).toHaveBeenCalledWith(
+      ToolConfirmationOutcome.ProceedOnce,
+      undefined,
+    );
+    expect(mockMessageBus.publish).not.toHaveBeenCalled();
+  });
 });

packages/cli/src/ui/contexts/ToolActionsContext.tsx

@@ -18,10 +18,28 @@ import {
   MessageBusType,
   type Config,
   type ToolConfirmationPayload,
+  type SerializableConfirmationDetails,
   debugLogger,
 } from '@google/gemini-cli-core';
 import type { IndividualToolCallDisplay } from '../types.js';
 
+type LegacyConfirmationDetails = SerializableConfirmationDetails & {
+  onConfirm?: (
+    outcome: ToolConfirmationOutcome,
+    payload?: ToolConfirmationPayload,
+  ) => Promise<void>;
+};
+
+function hasLegacyCallback(
+  details: SerializableConfirmationDetails | undefined,
+): details is LegacyConfirmationDetails {
+  return (
+    !!details &&
+    'onConfirm' in details &&
+    typeof details.onConfirm === 'function'
+  );
+}
+
 interface ToolActionsContextValue {
   confirm: (
     callId: string,
@@ -125,7 +143,15 @@ export const ToolActionsProvider: React.FC<ToolActionsProviderProps> = (
         return;
       }
 
-      debugLogger.warn(`ToolActions: No correlationId for ${callId}`);
+      // 3. Fallback: Legacy Callback
+      if (hasLegacyCallback(details)) {
+        await details.onConfirm(outcome, payload);
+        return;
+      }
+
+      debugLogger.warn(
+        `ToolActions: No correlationId or callback for ${callId}`,
+      );
     },
     [config, ideClient, toolCalls, isDiffingEnabled],
   );