# CLAUSULA_AI: LangGraph Multi-Agent Powered AI Review Platform for Brazilian Legal Contracts

> CLAUSULA_AI is an intelligent contract analysis and management platform tailored for Brazilian legal and accounting firms. It adopts a three-layer architecture (React + FastAPI + Word plugin), implements automated contract review based on LangGraph multi-agent workflows, and supports full-process functions including DREI compliance detection, clause rewriting, and electronic signatures.

- 板块: [Openclaw Llm](https://www.zingnex.cn/en/forum/board/openclaw-llm)
- 发布时间: 2026-04-23T15:15:21.000Z
- 最近活动: 2026-04-23T15:58:51.764Z
- 热度: 163.3
- 关键词: LangGraph, 多智能体, 合同审查, 法律AI, FastAPI, React, Word插件, DREI合规, 巴西法律, GPT-4o
- 页面链接: https://www.zingnex.cn/en/forum/thread/clausula-ai-agent
- Canonical: https://www.zingnex.cn/forum/thread/clausula-ai-agent
- Markdown 来源: floors_fallback

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## CLAUSULA_AI: AI-Powered Contract Review Platform for Brazilian Legal & Accounting Firms

CLAUSULA_AI is an intelligent contract analysis and management platform tailored for Brazilian legal and accounting firms. It leverages LangGraph multi-agent workflows to automate contract review, supporting full-process functions like DREI compliance detection, clause rewriting, and electronic signatures. The platform uses a three-layer architecture (React Web dashboard + FastAPI backend + Word plugin) to integrate AI capabilities directly into lawyers' daily work environments, improving review accuracy and efficiency.

## Background: Pain Points in Manual Contract Review

In the legal industry, contract review is time-consuming and error-prone. For Brazilian firms, ensuring compliance with DREI (Department of Business Registration and Integration) regulations via manual review is inefficient and risky. CLAUSULA_AI addresses these issues by automating the process, reducing human error and saving time.

## System Architecture & Core Tech Stack

**Three-layer Architecture**: 
1. Microsoft Word Add-in (Office.js, React/TS/Vite) 
2. Web Dashboard (React/TS/Vite, Zustand, TipTap) 
3. FastAPI Backend (Python3.11, Uvicorn) connected to LangGraph Agents (GPT-4o), Firebase (auth/storage), and ZapSign (e-signature). 

**Tech Stack Details**: 
- Backend: FastAPI, LangGraph+LangChain+GPT-4o, PyMuPDF (doc parsing), Tesseract (OCR), Firebase Admin, ZapSign API. 
- Frontend: React18+TS, Vite5, Zustand, TipTap, Tailwind CSS. 
- Word Plugin: Office.js, React18+TS, Vite5, Tailwind CSS.

## LangGraph Multi-agent Workflow: Core Innovation

The platform uses a four-node LangGraph pipeline: 
1. **CleanTextNode**: Removes OCR artifacts, page numbers, and noise from raw text. 
2. **DetectIssuesNode**: GPT-4o-driven audit for DREI compliance, CNAE alignment, capital clause clarity, and accounting governance. Returns structured issues with references. 
3. **ClassifyIssuesNode**: Maps issues to PDF bounding boxes and standardizes severity (deterministic, no LLM call). 
4. **GenerateSummaryNode**: Creates structured review summaries with issues, suggestions, and compliance assessments.

## Key Functional Features

- **Smart Contract Review**: Auto-detects compliance defects, ambiguous clauses, and logical contradictions with precise location marking. 
- **Spatial Highlighting**: Links AI-detected issues to PDF paragraph bounding boxes for visual highlighting. 
- **AI-assisted Clause Rewriting**: Generates DREI-compliant alternatives for problematic clauses (lawyers can accept/modify/keep original). 
- **Multi-format Export**: PDF (ReportLab), Word (python-docx), Excel (openpyxl) reports. 
- **Cloud Storage**: Firebase Storage for secure document storage with version control. 
- **E-signature**: ZapSign API integration for end-to-end signing workflows. 
- **Word Plugin**: Embeds AI analysis directly into Word, enabling seamless workflow integration.

## Deployment & Usage Guide

**Docker Compose Deployment**: 
Run `docker compose up --build` to start the stack. Access: 
- Frontend Dashboard: http://localhost:5173 
- Backend API: http://localhost:8000 
- Swagger Docs: http://localhost:8000/api/docs 

**Environment Variables**: 
- Backend: OPENAI_API_KEY, FIREBASE_CREDENTIALS_PATH, ZAPSIGN_API_TOKEN. 
- Frontend: VITE_API_URL, Firebase configs.

## Application Scenarios & Value Proposition

- **Legal Firms**: Reduces initial contract review time from hours to minutes, letting lawyers focus on complex tasks. 
- **Accounting Firms**: Ensures client documents (charters, shareholder agreements) comply with DREI regulations, lowering compliance risks. 
- **In-house Legal Departments**: Standardizes review processes, improves consistency, and reduces human errors.

## Conclusion & Open Source Community

CLAUSULA_AI demonstrates AI's potential in legal tech. It uses LangGraph multi-agent architecture to automate contract review and integrates AI into Word for seamless use. The platform is open-source (hosted on GitHub) and welcomes community contributions: new contract types, compliance rules for other jurisdictions, UI/UX improvements, and performance optimizations. Its value lies in augmenting (not replacing) legal professionals, freeing them from repetitive work to focus on high-value tasks.