Cerebra Legal MCP Server

Cerebra Legal MCP 服务

一个企业级 MCP 服务，用于法律推理与分析，其设计基于 Anthropic 的工程博客 中的“think”工具概念。

概述

Cerebra Legal 提供三个强大的法律推理与分析工具：

1. legal_think - 一款结构化法律推理工具，可借助领域专属指导和模板，帮助分析复杂的法律问题。
2. legal_ask_followup_question - 一款专用工具，可在法律情境中提出后续问题，并提供领域专属选项。
3. legal_attempt_completion - 一款用于展示法律分析结果的工具，支持规范的结构和引文格式。

服务会自动检测法律领域（ANSC contestation、消费者保护、合同分析），并提供领域专属的指导、模板和反馈。

功能

• 领域检测：自动识别分析所属的法律领域
• 领域专属指导：针对不同法律领域提供量身定制的指导
• 结构化模板：提供领域专属的法律分析模板
• 引文格式：规范地格式化法律引文
• 思考质量分析：提供法律推理质量反馈
• 修订支持：支持修订先前的思考内容

安装

# Clone the repository
git clone https://github.com/yoda-digital/mcp-cerebra-legal-server.git
cd mcp-cerebra-legal-server

# Install dependencies
npm install

# Build the project
npm run build

使用方法

运行服务

npm start

测试服务

此代码库包含一个测试客户端，演示如何与服务交互：

# Make the test client executable
chmod +x test-client.js

# Run the test client
./test-client.js

测试客户端将：

1. 启动服务
2. 发送 tools/list 请求以获取可用工具
3. 发送包含示例思考内容的 legal_think 请求
4. 显示服务的响应

添加到 Claude

若要将服务添加到 Claude，请使用以下配置更新 MCP 设置文件：

用于 VSCode 扩展

编辑文件 ~/.config/Code/User/globalStorage/rooveterinaryinc.roo-cline/settings/cline_mcp_settings.json：

{
  "mcpServers": {
    "cerebra-legal": {
      "command": "node",
      "args": ["/path/to/mcp-cerebra-legal-server/build/index.js"],
      "disabled": false,
      "alwaysAllow": []
    }
  }
}

用于 Claude 桌面应用

编辑文件 ~/Library/Application Support/Claude/claude_desktop_config.json（macOS），或编辑你所用平台上的对应文件：

{
  "mcpServers": {
    "cerebra-legal": {
      "command": "node",
      "args": ["/path/to/mcp-cerebra-legal-server/build/index.js"],
      "disabled": false,
      "alwaysAllow": []
    }
  }
}

在 Claude 中使用工具

将服务添加到 Claude 后，即可在对话中使用这些工具：

系统提示词集成

为了让 AI 与这些法律工具进行最佳交互，必须在系统提示词中加入适当的指导。这些工具遵循与标准 Cline 工具相同的 AI → Human 交互模型，但针对特定领域进行了增强。

系统提示词应包含每个工具的详细文档：

## legal_think
Description: A structured legal reasoning tool that helps analyze complex legal issues with domain-specific guidance and templates. This tool enables step-by-step legal analysis with feedback on reasoning quality.

Parameters:
- thought: (required) The current legal reasoning step
- thoughtNumber: (required) Current thought number in sequence
- totalThoughts: (required) Estimated total thoughts needed
- nextThoughtNeeded: (required) Whether another thought step is needed
- category: (optional) Legal domain category (auto-detected if not provided)
- references: (optional) Array of legal references
- isRevision: (optional) Whether this revises previous thinking
- revisesThoughtNumber: (optional) Which thought is being reconsidered
- requestGuidance: (optional) Whether to request domain-specific guidance
- requestTemplate: (optional) Whether to request a domain-specific template

Usage:
<legal_think>
<thought>Your legal reasoning step here</thought>
<thoughtNumber>Current thought number</thoughtNumber>
<totalThoughts>Estimated total thoughts</totalThoughts>
<nextThoughtNeeded>true or false</nextThoughtNeeded>
<category>Legal domain (optional)</category>
<references>Array of references (optional)</references>
<isRevision>true or false (optional)</isRevision>
<revisesThoughtNumber>Thought number being revised (optional)</revisesThoughtNumber>
<requestGuidance>true or false (optional)</requestGuidance>
<requestTemplate>true or false (optional)</requestTemplate>
</legal_think>

## legal_ask_followup_question
Description: Ask the user a legal domain-specific question to gather additional information needed to complete the task. This tool enhances the standard ask_followup_question with legal domain detection, terminology formatting, and domain-specific suggested options.

Parameters:
- question: (required) The question to ask the user. This will be automatically enhanced with appropriate legal terminology.
- options: (optional) An array of 2-5 options for the user to choose from. If not provided, domain-specific options will be automatically suggested.
- context: (optional) Additional context to help with domain detection and question formatting.

Usage:
<legal_ask_followup_question>
<question>Your question here</question>
<options>
Array of options here (optional), e.g. ["Option 1", "Option 2", "Option 3"]
</options>
<context>Additional context to help with domain detection (optional)</context>
</legal_ask_followup_question>

## legal_attempt_completion
Description: Present the result of your work to the user with proper legal structure and formatting. This tool enhances the standard attempt_completion with legal domain detection, document structuring, and citation formatting.

Parameters:
- result: (required) The result of the task. This will be automatically formatted with proper legal structure.
- command: (optional) A CLI command to execute to show a live demo of the result to the user.
- context: (optional) Additional context to help with domain detection and result formatting.

Usage:
<legal_attempt_completion>
<result>
Your final result description here
</result>
<command>Command to demonstrate result (optional)</command>
<context>Additional context to help with domain detection (optional)</context>
</legal_attempt_completion>

这些指导可确保 AI 理解：

1. 这些工具是标准工具的专用版本
2. 它们保留相同的 AI → Human 交互流程
3. 它们具备额外的能力和参数
4. 如何正确格式化工具调用

如果缺少这些指导，AI 可能无法充分利用这些工具内置的领域专属能力。

1. 使用 legal_think

legal_think 工具可通过结构化思考帮助你分析复杂的法律问题：

I need to analyze an ANSC contestation where a claimant argues that technical specifications in a tender were too restrictive.

Claude 将使用 legal_think 工具来：

• 检测法律领域（ANSC contestation）
• 提供领域专属指导
• 提供结构化分析模板
• 反馈法律推理的质量
• 支持修订先前的思考内容

2. 使用 legal_ask_followup_question

当 Claude 需要更多信息才能完成法律分析时：

What specific provisions of the technical specifications are being challenged?

Claude 将使用 legal_ask_followup_question 工具来：

• 使用恰当的法律术语来表述问题
• 提供供用户选择的领域专属选项
• 检测法律领域，以便根据上下文提出问题

3. 使用 legal_attempt_completion

Claude 准备好呈现最终法律分析时：

Based on my analysis, the technical specifications requiring "minimum 5 years experience" appear disproportionate and likely violate Article 33(2) of Law 131/2015 on public procurement.

Claude 将使用 legal_attempt_completion 工具来：

• 按照规范的法律结构整理结论
• 提取并格式化法律引文
• 将分析整理为清晰的章节
• 提供专业的法律文档格式

工具输入架构

legal_think

{
  "thought": "Analyzing ANSC contestation where claimant argues technical specifications were too restrictive.",
  "thoughtNumber": 1,
  "totalThoughts": 5,
  "nextThoughtNeeded": true,
  "category": "ansc_contestation",  // Optional, auto-detected if not provided
  "references": ["Law 131/2015", "ANSC Decision #12345"],  // Optional
  "isRevision": false,  // Optional
  "revisesThoughtNumber": null,  // Optional
  "requestGuidance": true,  // Optional
  "requestTemplate": true  // Optional
}

legal_ask_followup_question

{
  "question": "What specific provisions of the technical specifications are being challenged?",
  "options": [  // Optional, auto-generated if not provided
    "Are you challenging the experience requirements?",
    "Are you challenging the technical capacity requirements?",
    "Are you challenging the financial requirements?",
    "Are you challenging the certification requirements?"
  ],
  "context": "ANSC contestation regarding procurement of IT equipment"  // Optional
}

legal_attempt_completion

{
  "result": "Based on the analysis of ANSC contestation #12345, the technical specifications requiring 'minimum 5 years experience' appear disproportionate and likely violate Article 33(2) of Law 131/2015 on public procurement.",
  "command": null,  // Optional
  "context": "ANSC contestation analysis"  // Optional
}

架构

该服务采用模块化架构构建：

• 领域检测器：识别分析涉及的法律领域
• 法律知识库：提供特定领域的指导和模板
• 引文格式化器：规范地格式化法律引文
• 工具实现：处理每个工具的逻辑

开发

项目结构

mcp-cerebra-legal-server/
├── src/
│   ├── shared/           # Shared components
│   │   ├── DomainDetector.ts
│   │   ├── LegalKnowledgeBase.ts
│   │   ├── CitationFormatter.ts
│   │   └── types.ts
│   ├── tools/            # Tool implementations
│   │   ├── LegalThinkTool.ts
│   │   ├── LegalAskFollowupQuestionTool.ts
│   │   └── LegalAttemptCompletionTool.ts
│   ├── utils/            # Utilities
│   │   └── logger.ts
│   └── index.ts          # Main server entry point
├── build/                # Compiled JavaScript
├── test-client.js        # Test client
├── package.json
└── tsconfig.json

构建

npm run build

测试

# Run the test client
./test-client.js

仓库

此项目托管在 GitHub 上： https://github.com/yoda-digital/mcp-cerebra-legal-server

参考资料

• “think”工具：让 Claude 在复杂的工具使用场景中停下来思考 - Anthropic 工程博客

许可证

MIT