refactor: 消灭 skill.json，SKILL.md 成为唯一真相源

- 将 skill.json 中的 icon、shortDesc、category、maintainer、
  compatibleAgents、channel 迁移到 SKILL.md frontmatter 的 market 段
- 将 skill.json 中的 changelog 字段提取为独立 CHANGELOG.md
- 删除所有 skill.json（downloads/rating/ratingCount 等虚假数据一并移除）
- 版本号统一从 SKILL.md frontmatter version 读取

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/delete-agent/CHANGELOG.md

@@ -0,0 +1,5 @@
+# Changelog
+
+## [2.1.0] - 2026-02-26
+
+- 移除 fetch_api 依赖，改为通过 Bash/curl 调用 HTTP API；API 地址由 system prompt 注入

skills/delete-agent/SKILL.md

@@ -7,8 +7,34 @@ status: enabled
 disable-model-invocation: true
 metadata:
   author: desirecore
-  version: "2.1.0"
-  updated_at: "2026-02-26"
+  version: 2.1.0
+  updated_at: '2026-02-26'
+version: 2.1.0
+tags:
+  - 智能体
+  - 删除
+  - 元技能
+  - 清理
+  - 安全
+market:
+  icon: >-
+    <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0
+    24 24" fill="none"><defs><linearGradient id="da2-a" x1="2" y1="7" x2="16"
+    y2="21" gradientUnits="userSpaceOnUse"><stop stop-color="#FF9500"/><stop
+    offset="1" stop-color="#FF3B30"/></linearGradient></defs><circle cx="9"
+    cy="7" r="4" fill="url(#da2-a)" fill-opacity="0.15" stroke="url(#da2-a)"
+    stroke-width="1.5"/><path d="M16 21v-2a4 4 0 0 0-4-4H6a4 4 0 0 0-4 4v2"
+    fill="url(#da2-a)" fill-opacity="0.1" stroke="url(#da2-a)"
+    stroke-width="1.5"/><circle cx="19" cy="11" r="4" fill="#FF3B30"
+    fill-opacity="0.12"/><line x1="16.5" y1="11" x2="21.5" y2="11"
+    stroke="#FF3B30" stroke-width="2" stroke-linecap="round"/></svg>
+  short_desc: 安全删除智能体及其关联数据，支持多重确认与可选历史清理
+  category: productivity
+  maintainer:
+    name: DesireCore Official
+    verified: true
+  compatible_agents: []
+  channel: latest
 ---
 
 # delete-agent 技能

skills/delete-agent/skill.json

@@ -1,32 +0,0 @@
-{
-  "id": "delete-agent",
-  "name": "删除智能体",
-  "icon": "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"24\" height=\"24\" viewBox=\"0 0 24 24\" fill=\"none\"><defs><linearGradient id=\"da2-a\" x1=\"2\" y1=\"7\" x2=\"16\" y2=\"21\" gradientUnits=\"userSpaceOnUse\"><stop stop-color=\"#FF9500\"/><stop offset=\"1\" stop-color=\"#FF3B30\"/></linearGradient></defs><circle cx=\"9\" cy=\"7\" r=\"4\" fill=\"url(#da2-a)\" fill-opacity=\"0.15\" stroke=\"url(#da2-a)\" stroke-width=\"1.5\"/><path d=\"M16 21v-2a4 4 0 0 0-4-4H6a4 4 0 0 0-4 4v2\" fill=\"url(#da2-a)\" fill-opacity=\"0.1\" stroke=\"url(#da2-a)\" stroke-width=\"1.5\"/><circle cx=\"19\" cy=\"11\" r=\"4\" fill=\"#FF3B30\" fill-opacity=\"0.12\"/><line x1=\"16.5\" y1=\"11\" x2=\"21.5\" y2=\"11\" stroke=\"#FF3B30\" stroke-width=\"2\" stroke-linecap=\"round\"/></svg>",
-  "shortDesc": "安全删除智能体及其关联数据，支持多重确认与可选历史清理",
-  "fullDesc": "删除智能体是一个元技能，允许安全地删除不再使用的 Agent。执行前会验证智能体状态，清理文件系统、内存状态、消息订阅等所有关联数据，支持可选地删除会话历史。\n\n功能特性：\n- 状态检查：自动验证智能体是否处于可删除状态\n- 完整清理：文件系统、调度器、消息订阅、MCP 连接一并清除\n- 可选历史：默认保留会话历史，可选择同时删除\n- 多重确认：高风险操作，需用户多步确认\n- 结果报告：输出详细的清理回执",
-  "category": "productivity",
-  "tags": [
-    "智能体",
-    "删除",
-    "元技能",
-    "清理",
-    "安全"
-  ],
-  "version": "2.1.0",
-  "updatedAt": "2026-02-26",
-  "maintainer": {
-    "name": "DesireCore Official",
-    "verified": true
-  },
-  "downloads": 0,
-  "rating": 0,
-  "ratingCount": 0,
-  "installStatus": "not_installed",
-  "riskLevel": "high",
-  "requires": {
-    "tools": [],
-    "connections": []
-  },
-  "compatibleAgents": [],
-  "changelog": "v2.1.0: 移除 fetch_api 依赖，改为通过 Bash/curl 调用 HTTP API；API 地址由 system prompt 注入"
-}