From 8673426d5c2847a1bf4a3392ce7fa2816263e077 Mon Sep 17 00:00:00 2001
From: xuewenjie <xwj02155382@alibaba-inc.com>
Date: Tue, 16 Dec 2025 10:26:20 +0800
Subject: [PATCH] fix(core): use current chunk for shell output update instead
 of cumulative

---
 packages/core/src/tools/shell.ts | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/packages/core/src/tools/shell.ts b/packages/core/src/tools/shell.ts
index a886010d..194de4e8 100644
--- a/packages/core/src/tools/shell.ts
+++ b/packages/core/src/tools/shell.ts
@@ -193,11 +193,7 @@ export class ShellToolInvocation extends BaseToolInvocation<
             switch (event.type) {
               case 'data':
                 if (isBinaryStream) break;
-                if (typeof cumulativeOutput === 'string') {
-                  cumulativeOutput += event.chunk;
-                } else {
-                  cumulativeOutput = event.chunk;
-                }
+                cumulativeOutput = event.chunk;
                 shouldUpdate = true;
                 break;
               case 'binary_detected':