Sync third-party marketplace plugins

Constraint: Public skills are published only by explicit administrator action unless they are tracked third-party market sources.
Confidence: high
Scope-risk: narrow
Directive: Keep private/internal skills out of the public marketplace.
Tested: Marketplace validation passed.

config/external-sources.json

@@ -46,6 +46,48 @@
         "writing-skills": "创建、修改或验证 Agent skill 时使用，确保 skill 可触发、可维护、可测试。"
       }
     },
+    {
+      "id": "oh-my-codex",
+      "repo": "https://github.com/Yeachan-Heo/oh-my-codex.git",
+      "ref": "main",
+      "adapter": "codex-plugin",
+      "pluginName": "oh-my-codex",
+      "category": "开发工具",
+      "sourcePath": "plugins/oh-my-codex",
+      "sparseCheckout": [
+        "plugins/oh-my-codex"
+      ],
+      "include": [
+        ".codex-plugin",
+        "skills",
+        "hooks",
+        ".mcp.json",
+        ".app.json"
+      ],
+      "manifestOverrides": {
+        "description": "oh-my-codex 是 Codex CLI 的多 Agent 编排、结构化工作流、插件级 hooks、MCP 和 HUD 扩展插件。",
+        "interface": {
+          "displayName": "oh-my-codex",
+          "shortDescription": "为 Codex CLI 提供 OMX 工作流、hooks、MCP 和多 Agent 编排。",
+          "longDescription": "oh-my-codex 将 OMX 的规划、调试、代码评审、多 Agent 协作、目标执行、质量验证、wiki 和 HUD 工作流打包为 Codex 插件。插件包含官方支持的 plugin-scoped hooks、MCP 配置和多个 workflow skills；完整运行需要用户已安装 oh-my-codex CLI 并完成 omx setup。",
+          "developerName": "Yeachan Heo",
+          "category": "开发工具",
+          "capabilities": [
+            "Interactive",
+            "Read",
+            "Write"
+          ],
+          "defaultPrompt": [
+            "使用 oh-my-codex 帮我选择合适的 OMX 工作流。",
+            "使用 oh-my-codex 帮我规划、执行并验证这个开发任务。"
+          ],
+          "websiteURL": "https://oh-my-codex.dev",
+          "privacyPolicyURL": "https://github.com/Yeachan-Heo/oh-my-codex",
+          "termsOfServiceURL": "https://github.com/Yeachan-Heo/oh-my-codex",
+          "brandColor": "#111827"
+        }
+      }
+    },
     {
       "id": "ui-ux-pro-max",
       "repo": "https://github.com/nextlevelbuilder/ui-ux-pro-max-skill.git",