fix: prevent ghost border for AskUserDialog (#17788)

packages/cli/src/ui/components/messages/ToolGroupMessage.test.tsx

@@ -663,6 +663,31 @@ describe('<ToolGroupMessage />', () => {
       expect(output).toMatchSnapshot();
       unmount();
     });
+
+    it('renders nothing when only tool is in-progress AskUser with borderBottom=false', () => {
+      // AskUser tools in progress are rendered by AskUserDialog, not ToolGroupMessage.
+      // When AskUser is the only tool and borderBottom=false (no border to close),
+      // the component should render nothing.
+      const toolCalls = [
+        createToolCall({
+          callId: 'ask-user-tool',
+          name: 'Ask User',
+          status: ToolCallStatus.Executing,
+        }),
+      ];
+
+      const { lastFrame, unmount } = renderWithProviders(
+        <ToolGroupMessage
+          {...baseProps}
+          toolCalls={toolCalls}
+          borderBottom={false}
+        />,
+        { config: baseMockConfig },
+      );
+      // AskUser tools in progress are rendered by AskUserDialog, so we expect nothing.
+      expect(lastFrame()).toMatchSnapshot();
+      unmount();
+    });
   });
 
   describe('Ask User Filtering', () => {

packages/cli/src/ui/components/messages/ToolGroupMessage.tsx

@@ -116,13 +116,11 @@ export const ToolGroupMessage: React.FC<ToolGroupMessageProps> = ({
     [toolCalls, isEventDriven],
   );
 
-  // If all tools are hidden (e.g. group only contains confirming or pending tools),
-  // render nothing in the history log unless we have a border override.
-  if (
-    visibleToolCalls.length === 0 &&
-    borderTopOverride === undefined &&
-    borderBottomOverride === undefined
-  ) {
+  // If all tools are filtered out (e.g., in-progress AskUser tools, confirming tools
+  // in event-driven mode), only render if we need to close a border from previous
+  // tool groups. borderBottomOverride=true means we must render the closing border;
+  // undefined or false means there's nothing to display.
+  if (visibleToolCalls.length === 0 && borderBottomOverride !== true) {
     return null;
   }
 

packages/cli/src/ui/components/messages/__snapshots__/ToolGroupMessage.test.tsx.snap

@@ -110,6 +110,8 @@ exports[`<ToolGroupMessage /> > Confirmation Handling > shows confirmation dialo
 
 exports[`<ToolGroupMessage /> > Event-Driven Scheduler > hides confirming tools when event-driven scheduler is enabled 1`] = `""`;
 
+exports[`<ToolGroupMessage /> > Event-Driven Scheduler > renders nothing when only tool is in-progress AskUser with borderBottom=false 1`] = `""`;
+
 exports[`<ToolGroupMessage /> > Event-Driven Scheduler > shows only successful tools when mixed with confirming tools 1`] = `
 "╭──────────────────────────────────────────────────────────────────────────────╮
 │ ✓  success-tool A tool for testing                                           │

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

@@ -25,6 +25,7 @@ import {
   debugLogger,
   runInDevTraceSpan,
   EDIT_TOOL_NAMES,
+  ASK_USER_TOOL_NAME,
   processRestorableToolCalls,
   recordToolCallInteractions,
   ToolErrorType,
@@ -367,6 +368,14 @@ export const useGeminiStream = (
     const isEventDriven = config.isEventDrivenSchedulerEnabled();
     const anyVisibleInHistory = pushedToolCallIds.size > 0;
     const anyVisibleInPending = remainingTools.some((tc) => {
+      // AskUser tools are rendered by AskUserDialog, not ToolGroupMessage
+      const isInProgress =
+        tc.status !== 'success' &&
+        tc.status !== 'error' &&
+        tc.status !== 'cancelled';
+      if (tc.request.name === ASK_USER_TOOL_NAME && isInProgress) {
+        return false;
+      }
       if (!isEventDriven) return true;
       return (
         tc.status !== 'scheduled' &&