diff --git a/sanguo_factor/analyzer.py b/sanguo_factor/analyzer.py
index 975c82d..772ea6c 100644
--- a/sanguo_factor/analyzer.py
+++ b/sanguo_factor/analyzer.py
@@ -152,6 +152,11 @@ def run_factor_analysis(
             report_paths={}
         )
 
+    # 输出目录兜底建目录:API 路径 output_dir="/tmp/factor" 是容器/NAS 约定,
+    # VPS(Windows)首跑时该路径不存在 → tears JSON/心跳文件 open 直写会
+    # FileNotFoundError → tears 静默失败。exist_ok 幂等,已存在零成本。
+    os.makedirs(output_dir, exist_ok=True)
+
     # Create AlphaLab session and load symbols
     session = AlphaLabSession(lab_path=output_dir)
     # 逐只加载 + 心跳(分钟级任务的可观测性:行情加载 i/N)