diff --git a/scripts/gateway-watchdog.sh b/scripts/gateway-watchdog.sh
index 0e61bf4..c626d0c 100755
--- a/scripts/gateway-watchdog.sh
+++ b/scripts/gateway-watchdog.sh
@@ -164,13 +164,13 @@ count_rules() {
     fi
 
     # R1: 含 "lane task error" 且含 "FailoverError"（两步过滤）
-    R1_COUNT=$(echo "$recent_lines" | grep "lane task error" | _safe_count "FailoverError")
+    R1_COUNT=$(echo "$recent_lines" | grep "lane task error" | _safe_count "FailoverError" || echo 0)
 
     # R2: 含 "stalled session" 且含 "recovery=none"（两步过滤）
-    R2_COUNT=$(echo "$recent_lines" | grep "stalled session" | _safe_count "recovery=none")
+    R2_COUNT=$(echo "$recent_lines" | grep "stalled session" | _safe_count "recovery=none" || echo 0)
 
     # R3: 含 "rate_limit" 或含 "429"（匹配 JSON 中 rate_limit 关键字或 429 错误码）
-    R3_COUNT=$(echo "$recent_lines" | _safe_count 'rate_limit|429')
+    R3_COUNT=$(echo "$recent_lines" | _safe_count 'rate_limit|429' || echo 0)
 }
 
 # === 主逻辑 ===