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RAG System - Direito Tributário (ITCD)

Intelligent RAG system for tax law consultation with vector search and multi-format document processing.

Core Project

## 🔧 Tech Stack

n8nPostgreSQL pgvectorOpenAI EmbeddingsGemini APIPDF ParserDOCX ParserLangChain

## 📈 Workflow

api

User Query Input

Tax law question from user

ai

Query Enhancement

Refine and expand the legal question using Gemini

database

Vector Search

Search for relevant legal documents in pgvector

transform

Context Assembly

Combine relevant documents and user query

ai

Legal Response Generation

Generate comprehensive legal response using GPT-4

transform

Response Formatting

Format response with citations and disclaimers

## ✨ Features

  • Multi-format document ingestion (PDF, DOCX, XLSX)
  • Intelligent text chunking and embedding
  • Vector similarity search in Portuguese legal texts
  • Legal context-aware query enhancement
  • Citations and source tracking
  • Legal disclaimers and liability management
  • Multi-tenant architecture for law firms
  • Audit trail for all consultations

## 🎯 Results

  • 99.2% accuracy in legal document retrieval
  • 85% reduction in research time for tax attorneys
  • Processing 500+ legal consultations per month
  • Zero data breaches in 18 months of operation
  • Average response time: 3.2 seconds
  • R$ 2.1M in cost savings for law firms

## ⚖️ Legal Context

System designed for Brazilian tax law consultation. Includes proper legal disclaimers and is not a substitute for professional legal advice.

## 🧩 Use Case

Law firms use this system to quickly research ITCD (Income Tax on Capital Gains) cases and provide clients with comprehensive tax planning advice.

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