diff --git a/ruoyi-common/ruoyi-common-trace/src/main/java/org/ruoyi/common/trace/core/DefaultTraceStreamSpan.java b/ruoyi-common/ruoyi-common-trace/src/main/java/org/ruoyi/common/trace/core/DefaultTraceStreamSpan.java
index a9bb9d64..a73d18a0 100644
--- a/ruoyi-common/ruoyi-common-trace/src/main/java/org/ruoyi/common/trace/core/DefaultTraceStreamSpan.java
+++ b/ruoyi-common/ruoyi-common-trace/src/main/java/org/ruoyi/common/trace/core/DefaultTraceStreamSpan.java
@@ -43,26 +43,26 @@ public class DefaultTraceStreamSpan implements TraceStreamSpan {
     }
 
     @Override
-    public void finishSuccess() {
-        finish(TraceConstants.STATUS_SUCCESS, null);
+    public void finishSuccess(String outputPayload) {
+        finish(TraceConstants.STATUS_SUCCESS, null, outputPayload);
     }
 
     @Override
     public void finishError(Throwable throwable) {
-        finish(TraceConstants.STATUS_ERROR, TracePayloadUtils.error(throwable, traceProperties));
+        finish(TraceConstants.STATUS_ERROR, TracePayloadUtils.error(throwable, traceProperties), null);
     }
 
     @Override
     public void finishCancelledIfRunning() {
-        finish(TraceConstants.STATUS_CANCELLED, null);
+        finish(TraceConstants.STATUS_CANCELLED, null, null);
     }
 
-    private void finish(String status, String errorMessage) {
+    private void finish(String status, String errorMessage, String outputPayload) {
         if (!finished.compareAndSet(false, true)) {
             return;
         }
         try {
-            traceRecordService.finishNode(traceId, nodeId, status, errorMessage, null,
+            traceRecordService.finishNode(traceId, nodeId, status, errorMessage, outputPayload,
                 new Date(), System.currentTimeMillis() - startMillis);
         } catch (Exception e) {
             log.warn("结束 trace stream span 失败，traceId={}, nodeId={}", traceId, nodeId, e);
diff --git a/ruoyi-common/ruoyi-common-trace/src/main/java/org/ruoyi/common/trace/core/TraceStreamSpan.java b/ruoyi-common/ruoyi-common-trace/src/main/java/org/ruoyi/common/trace/core/TraceStreamSpan.java
index 349238d5..0a82eabc 100644
--- a/ruoyi-common/ruoyi-common-trace/src/main/java/org/ruoyi/common/trace/core/TraceStreamSpan.java
+++ b/ruoyi-common/ruoyi-common-trace/src/main/java/org/ruoyi/common/trace/core/TraceStreamSpan.java
@@ -7,7 +7,14 @@ public interface TraceStreamSpan {
 
     void detach();
 
-    void finishSuccess();
+    /**
+     * 结束成功的流式节点，并可写入输出摘要。
+     */
+    default void finishSuccess() {
+        finishSuccess(null);
+    }
+
+    void finishSuccess(String outputPayload);
 
     void finishError(Throwable throwable);
 
diff --git a/ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/service/chat/impl/ChatServiceFacade.java b/ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/service/chat/impl/ChatServiceFacade.java
index 678006f1..2f04c806 100644
--- a/ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/service/chat/impl/ChatServiceFacade.java
+++ b/ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/service/chat/impl/ChatServiceFacade.java
@@ -337,7 +337,8 @@ public class ChatServiceFacade implements IChatService {
                         result, RoleType.ASSISTANT.getName(), chatRequest.getModel());
                 }
                 if (llmSpan != null) {
-                    llmSpan.finishSuccess();
+                    llmSpan.finishSuccess(RagTracePayloadBuilder.streamOutputSummary(
+                        result == null ? 0 : result.length()));
                 }
                 finishTraceRun(traceRun, TraceConstants.STATUS_SUCCESS, null);
             } catch (Exception e) {
diff --git a/ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/service/retrieval/impl/KnowledgeRetrievalServiceImpl.java b/ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/service/retrieval/impl/KnowledgeRetrievalServiceImpl.java
index 938fdced..5d3cb5e6 100644
--- a/ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/service/retrieval/impl/KnowledgeRetrievalServiceImpl.java
+++ b/ruoyi-modules/ruoyi-chat/src/main/java/org/ruoyi/service/retrieval/impl/KnowledgeRetrievalServiceImpl.java
@@ -76,6 +76,8 @@ public class KnowledgeRetrievalServiceImpl implements KnowledgeRetrievalService
         }
         log.info("开始知识库检索, kid={}, query={}", queryVectorBo.getKid(), queryVectorBo.getQuery());
 
+        String retrievalInputPayload = traceActive()
+                ? RagTracePayloadBuilder.retrievalInputSummary(queryVectorBo) : null;
         List<KnowledgeRetrievalVo> finalResults = TraceNodeTemplate.withNode(traceRecordService, traceProperties,
                 "retrieval", RagTraceNodeTypes.NODE_RETRIEVAL,
                 KnowledgeRetrievalServiceImpl.class.getName(), "retrieve",
@@ -206,8 +208,10 @@ public class KnowledgeRetrievalServiceImpl implements KnowledgeRetrievalService
      */
     private List<KnowledgeRetrievalVo> performRerank(QueryVectorBo queryVectorBo, List<KnowledgeRetrievalVo> coarseResults) {
         int topN = queryVectorBo.getRerankTopN() != null ? queryVectorBo.getRerankTopN() : queryVectorBo.getMaxResults();
+        String rerankInputPayload = traceActive()
+                ? RagTracePayloadBuilder.rerankInputSummary(queryVectorBo, coarseResults.size(), topN) : null;
         TraceNodeHandle traceNode = startTraceNode("rerank", RagTraceNodeTypes.NODE_RERANK, "performRerank",
-                RagTracePayloadBuilder.rerankInputSummary(queryVectorBo, coarseResults.size(), topN));
+                rerankInputPayload);
         try {
             RerankModelService rerankModel = rerankModelFactory.createModel(queryVectorBo.getRerankModelName());
             
@@ -324,6 +328,10 @@ public class KnowledgeRetrievalServiceImpl implements KnowledgeRetrievalService
         }
     }
 
+    private boolean traceActive() {
+        return traceProperties.isEnabled() && StringUtils.isNotBlank(TraceContext.getTraceId());
+    }
+
     private void finishTraceNode(TraceNodeHandle traceNode, String status, Throwable error, String outputPayload) {
         if (traceNode == null || !traceNode.finished.compareAndSet(false, true)) {
             return;