diff --git a/README.md b/README.md
index bae317e..2b7df5b 100644
--- a/README.md
+++ b/README.md
@@ -85,7 +85,7 @@ curl http://localhost:5199/ai/tasks/550e8400-e29b-41d4-a716-446655440000
 | type | 说明 | params 字段 |
 |------|------|------------|
 | `aggregate-report` | 聚合学习残片为报告 | `taskName`, `expectation`, `fragments[]` |
-| `generate-mind-map` | 生成思维导图大纲 | `taskName`, `reports[]`, `fragments[]`, `applications[]` |
+| `generate-mind-map` | 生成思维导图大纲 | `taskName`, `reports[]`, `applications[]` |
 | `compare-recall` | 对比用户回忆与标准导图 | `taskName`, `standardOutline`, `recallOutline` |
 
 ## 架构位置
diff --git a/src/llm/prompts.test.ts b/src/llm/prompts.test.ts
index c5d3495..a5b29aa 100644
--- a/src/llm/prompts.test.ts
+++ b/src/llm/prompts.test.ts
@@ -32,15 +32,14 @@ describe("aggregateReportPrompt", () => {
 });
 
 describe("generateMindMapPrompt", () => {
-  it("要求输出缩进大纲且包含全部输入", () => {
+  it("要求输出缩进大纲且只包含学习报告", () => {
     const messages = generateMindMapPrompt(
       "Java 并发",
       "并发编程学习",
       ["报告一"],
-      ["残片一", "残片二"],
     );
     expect(messages[0].content).toContain("缩进");
     expect(messages[1].content).toContain("报告一");
-    expect(messages[1].content).toContain("残片二");
+    expect(messages[1].content).not.toContain("学习残片");
   });
 });
diff --git a/src/llm/prompts.ts b/src/llm/prompts.ts
index 462fd5d..7158039 100644
--- a/src/llm/prompts.ts
+++ b/src/llm/prompts.ts
@@ -50,20 +50,19 @@ export function aggregateReportPrompt(
 }
 
 /**
- * 从学习报告和残片生成标准思维导图（预留，用于替代 Java 端 BuiltinMindMapGenerator）。
+ * 从学习报告生成标准思维导图（预留，用于替代 Java 端 BuiltinMindMapGenerator）。
  * 输出为缩进大纲文本，与后端 MindMapTreeTool.parseOutline 格式一致。
  */
 export function generateMindMapPrompt(
   taskName: string,
   taskDescription: string,
   reports: string[],
-  fragments: string[],
 ): ChatMessage[] {
   return [
     {
       role: "system",
       content: [
-        "你是一名知识结构整理助手。请阅读某个学习任务的全部学习报告和残片，",
+        "你是一名知识结构整理助手。请阅读某个学习任务的全部学习报告，",
         "将其中的知识点整理成一份思维导图大纲。要求：",
         "1. 第一行是导图根标题（任务主题）；",
         "2. 之后每行一个节点，用两个空格的缩进表示层级；",
@@ -81,9 +80,6 @@ export function generateMindMapPrompt(
         "",
         "学习报告：",
         ...reports.map((r, i) => `${i + 1}. ${r}`),
-        "",
-        "学习残片：",
-        ...fragments.map((f, i) => `${i + 1}. ${f}`),
       ]
         .filter(Boolean)
         .join("\n"),
diff --git a/src/task-queue.ts b/src/task-queue.ts
index 03594ef..fa75060 100644
--- a/src/task-queue.ts
+++ b/src/task-queue.ts
@@ -160,12 +160,10 @@ function buildMessages(task: TaskRecord) {
     }
     case "generate-mind-map": {
       const reports = p.reports as string[] | undefined;
-      const fragments = p.fragments as string[] | undefined;
       return generateMindMapPrompt(
         p.taskName as string,
         (p.taskDescription as string) ?? "",
         reports ?? [],
-        fragments ?? [],
       );
     }
     case "compare-recall": {