feat: 新增 create 命令，移除 fallbackNote，plan 不再自动 mkdir

src/cli.ts

@@ -7,6 +7,7 @@ import { runInit } from "./commands/init.ts";
 import { findProjectRoot, loadConfig, getChangeDir, getArchiveDir } from "./core/config.ts";
 import {
   assembleDiscussPrompt,
+  assembleCreatePrompt,
   assemblePlanPrompt,
   assembleBuildPrompt,
   assembleArchivePrompt,
@@ -15,7 +16,7 @@ import { scanChanges } from "./core/scanner.ts";
 import { UsageError, ConfigError, CommandError, InternalError, CliError } from "./cli/errors.ts";
 import { printError } from "./cli/output.ts";
 import { showGlobalHelp, showCommandHelp } from "./cli/help.ts";
-import { getPmPrefix, getFallbackNote, DEFAULT_PREFIX, detectCommandPrefix } from "./core/pm.ts";
+import { getPmPrefix, DEFAULT_PREFIX, detectCommandPrefix } from "./core/pm.ts";
 import type { ChangeStatus, RuneConfig } from "./types.ts";
 
 function requireProjectRoot(): string {
@@ -137,11 +138,10 @@ cli.command("version", "显示版本号").action(() => {
 
 cli.command("init [...tools]", "初始化 Rune 并注入工具配置").action(async (tools: string[]) => {
   const prefix = getPmPrefix();
-  const fallbackNote = getFallbackNote();
   if (!tools || tools.length === 0) {
     throw new UsageError("请指定至少一个工具", {
       usage: `${prefix} init <工具...>`,
-      hint: `如：${prefix} init opencode\n\n${fallbackNote}`,
+      hint: `如：${prefix} init opencode`,
     });
   }
   await runInit(process.cwd(), tools);
@@ -150,11 +150,10 @@ cli.command("init [...tools]", "初始化 Rune 并注入工具配置").action(as
 
 cli.command("update [...tools]", "更新已注入的工具配置").action(async (tools: string[]) => {
   const prefix = getPmPrefix();
-  const fallbackNote = getFallbackNote();
   if (!tools || tools.length === 0) {
     throw new UsageError("请指定至少一个工具", {
       usage: `${prefix} update <工具...>`,
-      hint: `如：${prefix} update opencode\n\n${fallbackNote}`,
+      hint: `如：${prefix} update opencode`,
     });
   }
   const root = requireProjectRoot();
@@ -206,6 +205,21 @@ cli.command("discuss", "讨论阶段").action(async () => {
   console.log(prompt);
 });
 
+cli.command("create <change-name>", "创建变更").action(async (changeName: string) => {
+  validateChangeName(changeName);
+  const root = requireProjectRoot();
+  const config = await loadConfig(root);
+  const changeDir = getChangeDir(root, changeName);
+  if (existsSync(changeDir)) {
+    throw new CommandError(`变更 "${changeName}" 已存在`, {
+      hint: `请使用其他名称，或运行 ${getPmPrefix(config)} status 查看现有变更`,
+    });
+  }
+  await mkdir(changeDir, { recursive: true });
+  const prompt = assembleCreatePrompt(config);
+  console.log(prompt);
+});
+
 cli
   .command("plan <change-name> <document-name>", "规划阶段")
   .action(async (changeName: string, documentName: string) => {
@@ -220,7 +234,12 @@ cli
     }
 
     const changeDir = getChangeDir(root, changeName);
-    await mkdir(changeDir, { recursive: true });
+    if (!existsSync(changeDir)) {
+      const prefix = getPmPrefix(config);
+      throw new CommandError(`变更 '${changeName}' 不存在`, {
+        hint: `请先运行 ${prefix} create ${changeName} 创建变更`,
+      });
+    }
 
     const doc = planDocs.find((d) => d.name === documentName)!;
     if (doc.depend && doc.depend.length > 0) {
@@ -246,7 +265,7 @@ cli.command("build <change-name>", "构建阶段").action(async (changeName: str
   if (!existsSync(changeDir)) {
     const prefix = getPmPrefix();
     throw new CommandError(`变更 '${changeName}' 不存在`, {
-      hint: `请先运行 ${prefix} plan ${changeName} 创建变更`,
+      hint: `请先运行 ${prefix} create ${changeName} 创建变更`,
     });
   }
   const config = await loadConfig(root);
@@ -261,7 +280,7 @@ cli.command("archive <change-name>", "归档阶段").action(async (changeName: s
   if (!existsSync(changeDir)) {
     const prefix = getPmPrefix();
     throw new CommandError(`变更 '${changeName}' 不存在`, {
-      hint: `请先运行 ${prefix} plan ${changeName} 创建变更`,
+      hint: `请先运行 ${prefix} create ${changeName} 创建变更`,
     });
   }
   const config = await loadConfig(root);

src/core/assembler.ts

@@ -106,7 +106,7 @@ export async function assembleBuildPrompt(
   } catch {
     const prefix = getPmPrefix(config);
     throw new CommandError(`变更 "${changeName}" 尚未完成规划，task.md 不存在`, {
-      hint: `请先完成规划阶段：${prefix} plan ${changeName} 生成所有规划文档`,
+      hint: `请先完成规划阶段：${prefix} plan ${changeName} task 生成任务文档`,
     });
   }