feat(app): 移除内置agents并添加CORS支持和技能上传优化

移除了agents/registry.json中的所有内置agents配置，将agents数组清空。
为web应用添加了CORS中间件支持，允许指定的前端地址跨域访问。
重构了技能上传功能，增加了LLM重写机制，自动规范化上传的技能格式。
新增了工具名称提取逻辑，从技能正文中自动识别Required Tools段落。
更新了技能学习候选者和草稿的载荷结构，添加评估报告统计信息。
修改了意图路由技能的说明，改进任务状态管理逻辑。

skills/cron-scheduler/skill.json

@@ -5,9 +5,16 @@
   "display_name": "cron-scheduler",
   "lineage": [],
   "name": "cron-scheduler",
-  "owners": ["system"],
+  "owners": [
+    "system"
+  ],
   "source_kind": "initial",
   "status": "active",
-  "tags": ["cron", "scheduler", "timer", "periodic"],
+  "tags": [
+    "cron",
+    "scheduler",
+    "timer",
+    "periodic"
+  ],
   "updated_at": "2026-05-26T00:00:00.000000+00:00"
-}
+}

skills/cron-scheduler/versions/v0001/SKILL.md

@@ -5,13 +5,35 @@ tools:
   - cron
 ---
 
-# Cron Scheduler — 定时任务调度
+# Cron Scheduler
+
+## Overview
+
+定时任务和周期性调度。支持标准 cron 表达式、一次性提醒和持久化任务。
+
+## When to Use
+
+- Use when the task requires Cron Scheduler guidance.
+
+## Required Tools
+
+- `cron`
+
+## Workflow
+
+- Identify whether the user's request matches the skill's trigger conditions.
+- Read the relevant source guidance below and apply only the steps that fit the current task.
+- Use the required tools deliberately and keep tool output tied to the user's goal.
+
+### Source Guidance
+
+### Cron Scheduler — 定时任务调度
 
 基于 cron 表达式的定时任务和一次性提醒。
 
-## 工具说明
+#### 工具说明
 
-### cron
+##### cron
 创建和管理 Beaver 定时通知或 Task。
 - `action` (str): `add` | `list` | `remove` | `toggle` | `run`
 - `message` (str): 触发时执行的任务说明，`add` 时必填
@@ -25,10 +47,25 @@ tools:
 - `mode` (str | None): `notification` 或 `task`
 - `requires_followup` (bool | None): task 模式下是否需要用户跟进
 
-## 使用原则
+#### 使用原则
 
 1. 避开 :00 和 :30 整点分钟，分散负载
 2. 一次性提醒优先使用 `at_iso` 或清晰的 `schedule`
 3. 需要持续提醒时使用 `mode="notification"`，需要 Task 跟踪时才用 `mode="task"`
 4. 定期用 `action="list"` 确认任务是否按预期调度
 5. 任务触发时 `message` 会完整执行，确保内容自包含
+
+## Validation
+
+- Verify the requested outcome with the most direct available check.
+- Report any skipped step, unavailable dependency, or remaining uncertainty explicitly.
+
+## Boundaries
+
+- Do not broaden the task beyond the user's request.
+- Do not use tools that are not listed or clearly available in the current runtime.
+
+## Anti-Patterns
+
+- Do not summarize the skill instead of applying it.
+- Do not claim completion without validation evidence.

skills/cron-scheduler/versions/v0001/version.json

@@ -1,12 +1,14 @@
 {
   "change_reason": "Initial skill for cron scheduling",
-  "content_hash": "placeholder",
+  "content_hash": "1826b1b2921197045bccce45b4e1997ee212d10cc28b3ea5f42bf7b1982beacc",
   "created_at": "2026-05-26T00:00:00.000000+00:00",
   "created_by": "system",
   "frontmatter": {
     "description": "定时任务和周期性调度。支持标准 cron 表达式、一次性提醒和持久化任务。",
     "name": "cron-scheduler",
-    "tools": ["cron"]
+    "tools": [
+      "cron"
+    ]
   },
   "parent_version": null,
   "provenance": {
@@ -15,8 +17,10 @@
   },
   "review_state": "published",
   "skill_name": "cron-scheduler",
-  "summary": "Cron Scheduler — 基于 cron 表达式的定时任务和一次性提醒",
-  "summary_hash": "placeholder",
-  "tool_hints": ["cron"],
+  "summary": "# Cron Scheduler ## Overview 定时任务和周期性调度。支持标准 cron 表达式、一次性提醒和持久化任务。",
+  "summary_hash": "66b35720f0eb98008c5e53408bb8f13961f7e733deb5e01409f7cb6d017ba002",
+  "tool_hints": [
+    "cron"
+  ],
   "version": "v0001"
 }