diff --git a/agents/haonan/workspace/dev-workflow/stats.py b/agents/haonan/workspace/dev-workflow/stats.py
index 2f72768..6561bf1 100644
--- a/agents/haonan/workspace/dev-workflow/stats.py
+++ b/agents/haonan/workspace/dev-workflow/stats.py
@@ -18,6 +18,12 @@ from collections import defaultdict
 STATS_DIR = Path(__file__).parent / "data"
 STATS_FILE = STATS_DIR / "stats_data.json"
 
+# 锁文件路径
+LOCK_FILE = STATS_DIR / "stats_data.lock"
+
+# 最大事件数量限制
+MAX_EVENTS = 10000
+
 # 敏感字段列表（不记录这些字段）
 SENSITIVE_FIELDS = {"password", "token", "secret", "key", "credential", "auth"}
 
@@ -153,6 +159,11 @@ def record_event(
         # 加载现有数据
         data = _load_stats_data()
         data["events"].append(event)
+        
+        # 事件数量限制：超过 MAX_EVENTS 时移除最旧的事件
+        if len(data["events"]) > MAX_EVENTS:
+            data["events"] = data["events"][-MAX_EVENTS:]
+        
         data["metadata"]["last_updated"] = datetime.now().isoformat()
         
         # 原子写入