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Jev

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Jev judgments for agents: injection scanning, shell risk gating, ranking

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

One-click editor setup isn’t available for this listing yet — we don’t have a confirmed install command, and we’d rather show nothing than point your editor at the wrong package or host. Follow the project’s own setup instructions, linked above.

Manual Client & Custom JSON ConfigExpand JSON ▾
No confirmed setup config for this listing yet. We only publish a config block when the install details come from the project itself — its README, its docs, or a verified owner. We haven’t found those for jev, and we’d rather show nothing than a guess you’d paste into your client. Follow the project’s own setup instructions for the current steps.
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Documentation Overview

jev-harness-lab

用 TypeSafe Jev(System One 决策模型)做 agent harness 工程实验的技术仓库:评测框架、基准报告、可运行的集成工具(MCP server、skill router)。

skills.sh

安装

① MCP server(给 agent 加三个 Jev 工具)

用 uv 一条命令,无需克隆:

bash
# 从 PyPI
uvx jev-mcp

# 直接从 GitHub 源码运行
uvx --from git+https://github.com/Aitejiu/jev-harness-lab jev-mcp

配置到任意 MCP 客户端(opencode / Claude Desktop 等):

config.json
{
  "mcp": {
    "jev": {
      "type": "local",
      "command": ["uvx", "--from", "git+https://github.com/Aitejiu/jev-harness-lab", "jev-mcp"],
      "environment": { "TYPESAFE_API_KEY": "your-key" },
      "enabled": true
    }
  }
}

提供的工具:

工具作用
scan_injection扫描工具/网页/邮件输出里的注入指令,返回 block / review / pass
bash_riskshell 命令四维风险打分(破坏性 / 触密 / 外发 / 不可逆),返回 deny / review / allow
rank_candidates候选片段按相关性打分排序(RAG 精排)

MCP Registry 归属标记(勿改格式):

mcp-name: io.github.Aitejiu/jev

② Agent skill(让 Jev 帮主模型选 skill)

Terminal
npx skills add Aitejiu/jev-harness-lab --skill jev-skill-router

用 Jev 把任务路由到已安装的 skill,并且只加载选中那一个的完整指令,避免把整个 skill 目录塞进主模型上下文。技能页:https://www.skills.sh/aitejiu/jev-harness-lab/jev-skill-router

环境变量

两个集成都需要:

server.ts
export TYPESAFE_API_KEY=<your-key>

目录

Code
.
├── examples/            # 最小可运行示例(三原语、state、路由、护栏、抽取)
├── eval/                # 评测框架:11 个基准脚本 + 24 份报告 + 原始结果
│   └── datasets/        # 手工构造的数据集(如 130 条 shell 命令风险集)
├── integrations/
│   └── opencode/        # opencode 插件:jev_route_skill(skill 门控)
├── skills/
│   └── jev-skill-router/  # 可安装的 agent skill(SKILL.md + 独立脚本,skills.sh)
├── docs/
│   └── REPORT.md        # 技术评估报告(数据与结论)
├── src/jev_mcp/         # MCP server 包(PyPI: jev-mcp)
├── pyproject.toml       # Python 打包配置(console script: jev-mcp)
├── server.json          # MCP Registry 元数据(mcp-name: io.github.Aitejiu/jev)
├── mcp_server.py        # 兼容 shim:不安装也可 python mcp_server.py 运行
├── skill_router.py      # 本地 skill 目录路由(Jev 选择并加载 SKILL.md)
├── common.py            # .env 加载 + 共享 client
└── requirements.txt

快速开始

bash
uv venv --python 3.12 .venv
uv pip install -r requirements.txt
echo "TYPESAFE_API_KEY=<your-key>" > .env
bash
# 最小示例
.venv/bin/python examples/quickstart.py
.venv/bin/python examples/noul.py          # criteria 对判断的影响
.venv/bin/python examples/routing.py       # 阈值路由

# 跑评测(示例:skill router,501 个真实 skills)
.venv/bin/python eval/run_skillretbench.py --variant hybrid --per-setting 100

评测结果缓存在 eval/results/*.jsonl(已随仓库提交,可 --report-only 直接出报告);原始数据集在 eval/data/,需按 eval/README.md 的说明下载(已 gitignore)。

集成工具

MCP server

bash
.venv/bin/python mcp_server.py   # stdio
工具作用输入 → 输出
scan_injection扫描工具输出中的注入指令tool_output → action(block/review/pass) + 概率
bash_riskshell 命令四维风险打分command → action(deny/review/allow) + 破坏性/触密/外发/不可逆分数
rank_candidates候选片段相关性重排query + candidates(≤10) → 排序后的 index/score

接入 opencode 的配置示例(项目 .opencode/opencode.json):

config.json
{
  "mcp": {
    "jev": {
      "type": "local",
      "command": ["/absolute/path/to/jev-harness-lab/.venv/bin/python", "/absolute/path/to/jev-harness-lab/mcp_server.py"],
      "enabled": true
    }
  }
}

Skill router

bash
.venv/bin/python skill_router.py --query "帮我查飞书文档" --load

opencode 插件在 integrations/opencode/jev-skill-router.ts:注册 jev_route_skill(task) 工具,请求进来时用 Jev 从本地 skill 目录选出最合适的一个并返回其完整指令。参考做法是配合 agent.build.tools.skill = false 关闭内置 skill 工具,使主模型上下文不再携带整个 skill 目录。

主要基准结果(详见 docs/REPORT.md)

任务数据结果
间接注入检测InjecAgent 1,105 条阈值 0.10:P/R 100%,良性误报 0%
检索重排BEIR SciFact 900 对BM25 → Jev:MRR 0.622 → 0.843,Hit@1 50% → 78.3%
意图分类SNIPS / Banking777 类 97.9% / 77 类 80.3%
工具目录路由MetaTool 199 工具相似干扰 k=5 96.5%
Skill routerSkillRetBench 501 库hybrid 架构 R@1 75.8%(最强基线 38.0%)
命令风险门控自建 130 条危险拦截 100%、正常放行 98.2%
模型难度路由RouterBench51%(无信号,负结果)
轨迹失败归因Who&When 1,403 步AUROC 0.56(负结果)

总计约 22,500 次 API 调用、52.2M input tokens、$2.19。

说明

  • 所有 benchmark 使用公开数据集;原始结果 JSONL 已提交,报告可复现。
  • 部分官方基线为模拟实现(在报告中已标注)。
  • Jev 已知限制:choice 最多 255 个选项、仅文本输入、state+questions 共享约 32k tokens、英语为主。
  • 版本:jev-1.13.0,模型升级后建议重新评测。

Read the full README →View source on GitHub →

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Reviews

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Frequently Asked Questions about Jev

We don't have a confirmed install command for jev yet, so we don't publish a generated one — a guessed package name would point at the wrong package or none at all. Follow the project's own README or setup instructions (https://github.com/Aitejiu/jev-harness-lab) for the current steps.

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Technical Specs & Signals

Category💻Developer Tools
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Last updatedSep 28, 2026
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27Quality signal: Emerging · 27/100How this signal is calculated ▾
Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership8/20
Documentation & tools11/30
Adoption & activity1/15
Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

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