diff --git a/src/main/java/com/knowledge/base/infrastructure/util/http/SseOutputAdapter.java b/src/main/java/com/knowledge/base/infrastructure/util/http/SseOutputAdapter.java
index 2bda21f..011ddba 100644
--- a/src/main/java/com/knowledge/base/infrastructure/util/http/SseOutputAdapter.java
+++ b/src/main/java/com/knowledge/base/infrastructure/util/http/SseOutputAdapter.java
@@ -1,9 +1,11 @@
 package com.knowledge.base.infrastructure.util.http;
 
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.web.servlet.mvc.method.annotation.SseEmitter;
 
 import java.io.IOException;
 
+@Slf4j
 public class SseOutputAdapter implements WriterAdapter {
 
     private final SseEmitter emitter;
@@ -20,6 +22,7 @@ public class SseOutputAdapter implements WriterAdapter {
 
         // 如果 line 以 "data: " 开头，则去除该前缀
         if (line.startsWith("data: ")) {
+            log.debug("[LLM-SSE] line received: {}", line);
             line = line.substring(6).trim();
         }