Add caveman plugin source

config/external-sources.json

@@ -129,6 +129,54 @@
         "LICENSE"
       ]
     },
+    {
+      "id": "caveman",
+      "repo": "https://github.com/JuliusBrussee/caveman.git",
+      "ref": "main",
+      "adapter": "codex-plugin",
+      "pluginName": "caveman",
+      "category": "开发工具",
+      "sourcePath": "plugins/caveman",
+      "sparseCheckout": [
+        "plugins/caveman"
+      ],
+      "include": [
+        ".codex-plugin",
+        "skills",
+        "assets",
+        "agents"
+      ],
+      "excludePaths": [
+        "skills/caveman-stats",
+        "skills/caveman-compress"
+      ],
+      "manifestOverrides": {
+        "description": "Caveman 是面向 Codex 的极简输出风格和压缩式协作 skill 集合。",
+        "interface": {
+          "displayName": "Caveman",
+          "shortDescription": "让 Codex 输出更短，同时保留技术准确性。",
+          "longDescription": "Caveman 提供极简输出风格和压缩式子 Agent 协作指引。此公共市场版本只发布 Codex plugin 内可直接使用的 skills；不包含上游一键安装器、Claude Code hooks/statusline、MCP shrink、根目录 slash commands，以及依赖 Anthropic API 或 Claude CLI 的压缩脚本 skill。",
+          "developerName": "Julius Brussee",
+          "category": "开发工具",
+          "capabilities": [
+            "Read",
+            "Write"
+          ],
+          "defaultPrompt": [
+            "使用 Caveman 模式回答，压缩表达但保留技术准确性。",
+            "使用 Cavecrew 帮我判断这个任务是否适合分派给压缩输出的子 Agent。"
+          ],
+          "websiteURL": "https://github.com/JuliusBrussee/caveman",
+          "privacyPolicyURL": "https://github.com/JuliusBrussee/caveman/blob/main/README.md",
+          "termsOfServiceURL": "https://github.com/JuliusBrussee/caveman/blob/main/LICENSE",
+          "brandColor": "#6B7280"
+        }
+      },
+      "skillDescriptions": {
+        "caveman": "让 Codex 使用更短、更直接的表达，同时保留代码、命令、错误和技术细节。",
+        "cavecrew": "判断何时使用压缩输出的调查、编辑或评审子 Agent，以降低长会话上下文消耗。"
+      }
+    },
     {
       "id": "shadcn",
       "repo": "https://github.com/shadcn-ui/ui.git",