ContractGuard Contract Risk Assessment Tool (AWS)

Winner, Amazon Munich Hackathon 2025

ContractGuard is a serverless contract analysis tool that extracts key clauses from uploaded legal documents, benchmarks them against risk patterns, and explains red flags in plain language using AWS Bedrock's LLM capabilities.

---

🚀 Live Demo

Prototype: ContractGuard Demo

---

🏗 Architecture

The serverless architecture leverages AWS managed services for zero-maintenance, event-driven contract analysis:

graph LR
    A[User Browser] -->|1. Upload Contract PDF| B[S3 Bucket]
    B -->|2. S3 Event Trigger| C[Lambda: Extract]
    C -->|3. Analyze Document| D[Textract]
    D -->|4. Return JSON| C
    C -->|5. Store Extracted Text| E[S3: Processed/]
    C -->|6. Invoke Risk Analysis| F[Lambda: Analyze]
    F -->|7. Bedrock Prompt| G[AWS Bedrock Claude]
    G -->|8. Risk Assessment JSON| F
    F -->|9. Store Result| H[S3: Results/]
    F -->|10. Generate Presigned URL| H
    H -->|11. Return Result Link| A

Loading

For more detailed overview, see the Architecture in depth

🔧 Tech Stack

• Storage: Amazon S3 (upload, processed text, results)
• Compute: AWS Lambda (Python 3.11)
• Document Analysis: Amazon Textract
• AI/LLM: AWS Bedrock (Claude 3 Sonnet)
• Frontend: Static HTML/JS (S3 + CloudFront) or Flask API

---

✨ Features

• Upload & Extract: Drag-drop PDF contracts (multiple file formats supported); Textract extracts clauses and metadata
• Risk Benchmarking: Bedrock analyzes clauses against legal risk patterns (termination, liability, indemnity, IP rights)
• Plain Language Explanations: LLM translates legalese into actionable insights
• Instant Feedback: Results returned via presigned S3 URL in <10 seconds

---

📂 Repository Structure

contract-guard/
├── README.md
├── architecture.md          # Detailed AWS diagram and flow
├── lambda/
│   ├── extract_handler.py   # Textract extraction + S3 storage
│   ├── analyze_handler.py   # Bedrock risk analysis
│   └── requirements.txt
├── frontend/
│   ├── index.html           # Upload UI
│   └── app.js               # S3 presigned upload + result fetch
├── iac/
│   ├── cloudformation.yaml  # IaC for deployment
│   └── terraform/           # Alternative: Terraform modules
└── docs/
    └── demo.md              # Demo walkthrough

🧪 Use

Upload a sample NDA or service agreement PDF:

1. Navigate to the frontend URL
2. Upload contract → triggers Lambda pipeline
3. View extracted clauses and risk scores in ~8-10 seconds

---

🎯 Roadmap

• Multi-document batch analysis
• Clause comparison (contract A vs. contract B)
• Export risk report as PDF
• Integration with DocuSign API for signed contract analysis

---