Address review comment: use os.stat with follow_symlinks to correctly handle symlinks

wdskuki · wdskuki · commit 6df7365048da · 2026-03-18T09:38:18.000+08:00
diff --git a/src/agents/sandbox/fs-bridge-mutation-helper.ts b/src/agents/sandbox/fs-bridge-mutation-helper.ts
@@ -89,10 +89,10 @@ export const SANDBOX_PINNED_MUTATION_PYTHON = [
   "        # Preserve original file permissions if file exists",
   "        original_mode = None",
   "        try:",
-  "            original_stat = os.lstat(basename, dir_fd=parent_fd)",
+  "            original_stat = os.stat(basename, dir_fd=parent_fd, follow_symlinks=True)",
   "            original_mode = stat.S_IMODE(original_stat.st_mode)",
   "        except OSError:",
-  "            pass  # File doesn't exist, use default permissions",
+  "            pass  # File doesn't exist or can't be stat'd, use default permissions",
   "        temp_name, temp_fd = create_temp_file(parent_fd, basename)",
   "        while True:",
   "            chunk = stdin_buffer.read(65536)",
