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Legal counter-argument generation utilizing LLM, featuring document summarization and question-answering capabilities.

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legal-counter-argument

A powerful LLM-powered pipeline for summarizing legal documents, generating intelligent counterarguments, and enabling context-aware legal question answering. This system is designed to support individuals in understanding legal documents and crafting robust responses to legal accusations.

📌 Table of Contents

🧩 Overview

This project aims to empower users to generate intelligent legal counterarguments and ask detailed questions about legal documents using large language models (LLMs) like OpenAI’s gpt-3.5-turbo. It supports legal professionals, individuals without legal expertise, and researchers who need automated assistance with legal content.

⚙️ Features

  • ✔️ Automatic summarization of lengthy legal documents
  • ✔️ Counter-argument generation using LLMs
  • ✔️ Multi-format document ingestion (PDF, HTML, TXT)
  • ✔️ Semantic search & question-answering with Pinecone vector store
  • ✔️ LangChain-powered modular pipelines for flexibility and scalability

📐 System Architecture

🔁 1. Document Summarization & Counter-Argument Generation Workflow:

  1. Input Parsing: Load large legal documents from various formats.

  2. Chunking: Split into overlapping chunks (~2000 tokens) for contextual coherence.

  3. Prompt Design: Use custom prompt templates tailored for legal summarization.

  4. LLM Summarization: Generate summary chunks using load_summarize_chain from LangChain.

  5. Summary Fusion: Combine individual summaries into a final, cohesive summary.

  6. Counter-Argument Generation: Use OpenAI’s GPT models to derive intelligent counterarguments from the final summary.

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🔁 2. Document Question Answering Workflow

  1. Multi-format Support: Ingest files in PDF, text, or HTML format.

  2. Recursive Chunking: Segment using RecursiveCharacterTextSplitter (~1000 tokens with overlap).

  3. Embedding: Create dense vector embeddings using OpenAI's text-embedding-ada-002.

  4. Vector Store Setup: Store vectors in Pinecone for semantic search.

  5. QA Chain: Use LangChain’s load_qa_chain to retrieve relevant content and generate answers from LLM.

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🚀 Quick Start

🔧 Prerequisites

  • Python 3.9+
  • OpenAI API key
  • Pinecone API key & environment setup

📦 Installation

git clone https://github.com/yourusername/legal-counter-argument.git
cd legal-counter-argument
pip install -r requirements.txt

⚙️ Configuration

Update your .env file or set environment variables for:

OPENAI_API_KEY=your_openai_api_key
PINECONE_API_KEY=your_pinecone_api_key
PINECONE_ENV=your_pinecone_environment

🏃‍♂️ Running the Pipeline

# Run summarization & counter-argument generation
python summarize_and_counterarg.py --input_dir ./legal_docs

# Run document QA setup
python qa_pipeline.py --input_dir ./legal_docs

# Ask a question
python ask_question.py --question "What are the key charges in the document?"

🛠 Tech Stack

Python LangChain OpenAI Pinecone Streamlit MongoDB

📌 Future Enhancements

  • 🔒 Integrate document redaction for sensitive information

  • 🌐 Add support for multilingual legal documents

  • 🧠 Fine-tune smaller local LLMs for on-premise deployment

  • 📊 Visual dashboard for document navigation and QA

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Legal counter-argument generation utilizing LLM, featuring document summarization and question-answering capabilities.

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