diff --git a/modules/story-summary/vector/llm/atom-extraction.js b/modules/story-summary/vector/llm/atom-extraction.js
index 84c4a32..6481778 100644
--- a/modules/story-summary/vector/llm/atom-extraction.js
+++ b/modules/story-summary/vector/llm/atom-extraction.js
@@ -61,7 +61,7 @@ const SYSTEM_PROMPT = `你是场景摘要器。从一轮对话中提取1-2个场
 输入格式：
 <round>
   <user name="用户名">...</user>
-  <assistant name="角色名">...</assistant>
+  <assistant>...</assistant>
 </round>
 
 只输出严格JSON：
@@ -83,6 +83,7 @@ const SYSTEM_PROMPT = `你是场景摘要器。从一轮对话中提取1-2个场
 
 ## who
 - 参与互动的角色正式名称，不用代词或别称
+- 只从正文内容中识别角色名，不要把标签名（如 user、assistant）当作角色
 
 ## edges（关系三元组）
 - s=施事方 t=受事方 r=互动行为（10-15字）
@@ -218,7 +219,6 @@ async function extractAtomsForRoundWithRetry(userMessage, aiMessage, aiFloor, op
 
     const parts = [];
     const userName = userMessage?.name || '用户';
-    const aiName = aiMessage.name || '角色';
 
     if (userMessage?.mes?.trim()) {
         const userText = filterText(userMessage.mes);
@@ -226,7 +226,7 @@ async function extractAtomsForRoundWithRetry(userMessage, aiMessage, aiFloor, op
     }
 
     const aiText = filterText(aiMessage.mes);
-    parts.push(`<assistant name="${aiName}">\n${aiText}\n</assistant>`);
+    parts.push(`<assistant>\n${aiText}\n</assistant>`);
 
     const input = `<round>\n${parts.join('\n')}\n</round>`;