diff --git a/src/renderer/services/agent-engine.ts b/src/renderer/services/agent-engine.ts
index 8a1a84a..36b2072 100644
--- a/src/renderer/services/agent-engine.ts
+++ b/src/renderer/services/agent-engine.ts
@@ -567,10 +567,12 @@ Shell: ${osInfo.shell}
   messages.push(userMsg);
 
   // P2-1: 自动子任务拆解 — 检测用户消息中的并行任务关键词
+  // 排除文件内容（避免把小说/设定集误拆成子任务）
   const PARALLEL_PATTERNS = /同时|分别|以及|另外|此外|并且|也|also|and\s+also|separately|in\s+addition|meanwhile/i;
   const SUBTASK_SEPARATORS = /(?:^|\n)\s*(?:[1-9][.、)]|[-*•]\s+)/;
   const userText = userContent || '';
-  const hasParallel = PARALLEL_PATTERNS.test(userText) && userText.length > 100;
+  const hasFileContent = userText.includes('📄 文件');
+  const hasParallel = !hasFileContent && PARALLEL_PATTERNS.test(userText) && userText.length > 100 && userText.length < 5000;
 
   if (hasParallel && useTools) {
     // 尝试按数字列表拆分子任务