--- /tmp/evalscope-sync/src-v191/evalscope/api/messages/__init__.py	2026-07-21 03:18:18.000000000 +0000
+++ /data1/syy/evalscope/evalstone/evalscope/evalscope/api/messages/__init__.py	2026-09-01 03:48:30.947904360 +0000
@@ -11,4 +11,5 @@
 )
 from .content import Content, ContentAudio, ContentData, ContentImage, ContentReasoning, ContentText, ContentVideo
 from .perf_metrics import PerformanceMetrics, PerfSummary
+from .request_stats import RequestStats, is_client_error
 from .utils import parse_content_with_reasoning