From e9b500b5bcd26d18b03f144f05a9e7342b323a3c Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 3 Feb 2026 01:05:45 +0000
Subject: [PATCH 2/2] Remove subagent fallback from runSubagentTool

- Removed `?? 'subagent'` fallback from subAgentName assignment
- The UI layer (chatSubagentContentPart.ts) already handles undefined agentName with proper localization fallback
- All existing tests pass
- TypeScript compilation successful

Co-authored-by: zhichli <57812115+zhichli@users.noreply.github.com>
---
 .../contrib/chat/common/tools/builtinTools/runSubagentTool.ts   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/vs/workbench/contrib/chat/common/tools/builtinTools/runSubagentTool.ts b/src/vs/workbench/contrib/chat/common/tools/builtinTools/runSubagentTool.ts
index 0f4688f2f2a..b993e1d1b22 100644
--- a/src/vs/workbench/contrib/chat/common/tools/builtinTools/runSubagentTool.ts
+++ b/src/vs/workbench/contrib/chat/common/tools/builtinTools/runSubagentTool.ts
@@ -241,7 +241,7 @@ export class RunSubagentTool extends Disposable implements IToolImpl {
 				variables: { variables: variableSet.asArray() },
 				location: ChatAgentLocation.Chat,
 				subAgentInvocationId: invocation.callId,
-				subAgentName: mode?.name.get() ?? 'subagent',
+				subAgentName: mode?.name.get(),
 				userSelectedModelId: modeModelId,
 				userSelectedTools: modeTools,
 				modeInstructions,