diff --git a/src/core/assembler.ts b/src/core/assembler.ts
index eba93f8..b62e322 100644
--- a/src/core/assembler.ts
+++ b/src/core/assembler.ts
@@ -16,6 +16,15 @@ export function assembleDiscussPrompt(config: RuneConfig): string {
   return applyCommandPrefix(discuss.prompt, config);
 }
 
+export function assembleCreatePrompt(config: RuneConfig): string {
+  const create = config.stages.create;
+  if (!create)
+    throw new CommandError("创建阶段未配置", {
+      hint: "请在 .rune/config.yaml 中配置 stages.create",
+    });
+  return applyCommandPrefix(create.prompt, config);
+}
+
 export async function assemblePlanPrompt(
   config: RuneConfig,
   projectRoot: string,
@@ -45,8 +54,7 @@ export async function assemblePlanPrompt(
 
   const docPath = join(changeDir, `${doc.name}.md`);
   if (existsSync(docPath)) {
-    const existing = await readFile(docPath, "utf-8");
-    parts.push(`\n### 已有内容（请在此基础上修订）：\n${existing}`);
+    parts.push(`\n文档已存在，请先读取 ${docPath} 查看已有内容，在此基础上修订。`);
   }
 
   if (doc.template) {
@@ -114,13 +122,9 @@ export async function assembleBuildPrompt(
   const parts: string[] = [];
   parts.push(`# 构建阶段：${changeName}\n`);
   parts.push(build.prompt);
-  parts.push(`\n## 任务列表\n`);
-  parts.push(taskContent);
-  parts.push(`\n## 待执行任务（共 ${pendingTasks.length} 项）`);
-  for (const task of pendingTasks) {
-    parts.push(`- [ ] ${task.text}`);
-  }
-  parts.push(`\n请从第一个待执行任务开始。完成后更新 ${taskPath} 中的 checkbox。`);
+  parts.push(`\n请先读取 ${taskPath} 查看任务列表。`);
+  parts.push(`当前有 ${pendingTasks.length} 个待执行任务，从第一个未完成的任务开始。`);
+  parts.push(`完成后更新 ${taskPath} 中的 checkbox。`);
 
   return applyCommandPrefix(parts.join("\n"), config);
 }
@@ -142,23 +146,21 @@ export async function assembleArchivePrompt(
   if (config.metadata?.tracked) {
     const changeDir = getChangeDir(projectRoot, changeName);
     const taskPath = join(changeDir, "task.md");
-    try {
-      const taskContent = await readFile(taskPath, "utf-8");
-      const tasks = parseTasks(taskContent);
-      const incompleteTasks = tasks.filter((t) => !t.checked);
-      if (incompleteTasks.length > 0) {
-        parts.push("## ⚠️ 警告：存在未完成的任务\n");
-        parts.push(`以下 ${incompleteTasks.length} 个任务尚未完成：`);
-        for (const t of incompleteTasks) {
-          parts.push(`- [ ] ${t.text}`);
+    if (existsSync(taskPath)) {
+      try {
+        const taskContent = await readFile(taskPath, "utf-8");
+        const tasks = parseTasks(taskContent);
+        const incompleteTasks = tasks.filter((t) => !t.checked);
+        if (incompleteTasks.length > 0) {
+          parts.push("## ⚠️ 警告：存在未完成的任务\n");
+          parts.push(`请先读取 ${taskPath} 检查是否有未完成的任务。`);
+          parts.push("如有未完成任务，询问用户是否确认在任务未全部完成的情况下归档。");
+          parts.push("如用户确认，则继续归档；否则中止并返回构建阶段。");
+          parts.push("");
         }
-        parts.push("");
-        parts.push("请询问用户是否确认在任务未全部完成的情况下归档。");
-        parts.push("如用户确认，则继续归档；否则中止并返回构建阶段。");
-        parts.push("");
+      } catch {
+        // task.md 读取失败时不追加警告
       }
-    } catch {
-      // task.md 不存在时不追加警告
     }
   }
 
diff --git a/tests/core/assembler.test.ts b/tests/core/assembler.test.ts
index 2b56b01..a713fdc 100644
--- a/tests/core/assembler.test.ts
+++ b/tests/core/assembler.test.ts
@@ -3,12 +3,14 @@ import { mkdir, writeFile, rm } from "node:fs/promises";
 import { join } from "node:path";
 import {
   assembleDiscussPrompt,
+  assembleCreatePrompt,
   assemblePlanPrompt,
   assembleBuildPrompt,
   assembleArchivePrompt,
 } from "../../src/core/assembler.ts";
 import type { RuneConfig } from "../../src/types.ts";
 import { defaultConfig } from "../../src/defaults/config.ts";
+import { CommandError } from "../../src/cli/errors.ts";
 
 const TMP_DIR = join(import.meta.dir, "__tmp_assembler_test__");
 
@@ -38,6 +40,35 @@ describe("assembleDiscussPrompt", () => {
   });
 });
 
+describe("assembleCreatePrompt", () => {
+  it("返回默认 create 提示词", () => {
+    const prompt = assembleCreatePrompt(defaultConfig);
+    expect(prompt).toBeTruthy();
+    expect(prompt).toContain("变更名称");
+    expect(prompt).toContain("/rune-plan");
+  });
+
+  it("返回自定义 create 提示词", () => {
+    const config: RuneConfig = {
+      stages: { create: { prompt: "自定义创建" } },
+    };
+    const prompt = assembleCreatePrompt(config);
+    expect(prompt).toBe("自定义创建");
+  });
+
+  it("create 阶段未配置时抛出 CommandError", () => {
+    const config: RuneConfig = {
+      stages: { build: { prompt: "构建" } },
+    };
+    try {
+      assembleCreatePrompt(config);
+      expect.unreachable();
+    } catch (e) {
+      expect(e).toBeInstanceOf(CommandError);
+    }
+  });
+});
+
 describe("assemblePlanPrompt", () => {
   it("包含指定文档名称和提示词", async () => {
     const prompt = await assemblePlanPrompt(defaultConfig, TMP_DIR, "user-auth", "design");
@@ -46,13 +77,14 @@ describe("assemblePlanPrompt", () => {
     expect(prompt).not.toContain("task");
   });
 
-  it("包含已有文档内容（重复 plan 场景）", async () => {
+  it("已有文档时引导 AI 读取而非内嵌内容", async () => {
     const changeDir = join(TMP_DIR, ".rune", "changes", "user-auth");
     await mkdir(changeDir, { recursive: true });
     await writeFile(join(changeDir, "design.md"), "# 已有设计");
     const prompt = await assemblePlanPrompt(defaultConfig, TMP_DIR, "user-auth", "design");
-    expect(prompt).toContain("已有设计");
-    expect(prompt).toContain("在此基础上修订");
+    expect(prompt).toContain("已有内容");
+    expect(prompt).toContain("design.md");
+    expect(prompt).not.toContain("# 已有设计");
   });
 
   it("替换模板中的 {{change-name}}", async () => {
@@ -123,14 +155,15 @@ describe("assemblePlanPrompt", () => {
 });
 
 describe("assembleBuildPrompt", () => {
-  it("包含待执行任务列表", async () => {
+  it("引导 AI 读取 task.md 而非内嵌任务内容", async () => {
     const changeDir = join(TMP_DIR, ".rune", "changes", "user-auth");
     await mkdir(changeDir, { recursive: true });
     await writeFile(join(changeDir, "task.md"), `- [x] 任务一\n- [ ] 任务二\n- [ ] 任务三`);
     const prompt = await assembleBuildPrompt(defaultConfig, TMP_DIR, "user-auth");
-    expect(prompt).toContain("任务二");
-    expect(prompt).toContain("待执行任务");
-    expect(prompt).toContain("共 2 项");
+    expect(prompt).toContain("task.md");
+    expect(prompt).toContain("2");
+    expect(prompt).not.toContain("任务二");
+    expect(prompt).not.toContain("任务三");
   });
 
   it("所有任务完成时提示可归档", async () => {
@@ -218,7 +251,7 @@ describe("assembleArchivePrompt", () => {
     expect(prompt).not.toContain("未完成");
   });
 
-  it("tracked=true 时读取 task.md 并注入未完成任务警告", async () => {
+  it("tracked=true 时引导 AI 检查 task.md 而非内嵌任务内容", async () => {
     const changeDir = join(TMP_DIR, ".rune", "changes", "user-auth");
     await mkdir(changeDir, { recursive: true });
     await writeFile(join(changeDir, "task.md"), "- [ ] 未完成任务");
@@ -227,8 +260,9 @@ describe("assembleArchivePrompt", () => {
       metadata: { tracked: true },
     };
     const prompt = await assembleArchivePrompt(config, TMP_DIR, "user-auth");
+    expect(prompt).toContain("task.md");
     expect(prompt).toContain("未完成");
-    expect(prompt).toContain("未完成任务");
+    expect(prompt).not.toContain("- [ ] 未完成任务");
   });
 
   it("tracked=true 且所有任务完成时不注入警告", async () => {
diff --git a/tests/integration/flow.test.ts b/tests/integration/flow.test.ts
index 47a2edc..3efbf55 100644
--- a/tests/integration/flow.test.ts
+++ b/tests/integration/flow.test.ts
@@ -50,8 +50,8 @@ describe("完整 SDD 流程", () => {
     expect(changes[0].documents.length).toBeGreaterThan(0);
 
     const buildPrompt = await assembleBuildPrompt(config, TMP_DIR, changeName);
-    expect(buildPrompt).toContain("实现登录 API");
-    expect(buildPrompt).toContain("共 2 项");
+    expect(buildPrompt).toContain("task.md");
+    expect(buildPrompt).toContain("2");
 
     await writeFile(join(changeDir, "task.md"), "- [x] 实现登录 API\n- [x] 编写登录测试");
 
@@ -95,10 +95,10 @@ describe("完整 SDD 流程", () => {
     expect(changes).toHaveLength(2);
 
     const authPrompt = await assembleBuildPrompt(config, TMP_DIR, "auth");
-    expect(authPrompt).toContain("auth 任务");
+    expect(authPrompt).toContain("task.md");
 
     const paymentPrompt = await assembleBuildPrompt(config, TMP_DIR, "payment");
-    expect(paymentPrompt).toContain("payment 任务");
+    expect(paymentPrompt).toContain("task.md");
   });
 
   it("自定义配置覆盖默认配置", async () => {
@@ -189,7 +189,9 @@ describe("archive 校验", () => {
 
     const prompt = await assembleArchivePrompt(config, TMP_DIR, "incomplete-task");
     expect(prompt).toContain("警告");
-    expect(prompt).toContain("未完成任务");
+    expect(prompt).toContain("task.md");
+    expect(prompt).toContain("未完成");
+    expect(prompt).not.toContain("- [ ] 未完成任务");
     expect(prompt).toContain("是否确认");
   });