NDA Clause Conflict Checker API

This project provides a FastAPI-based REST API that checks for conflicts between a new NDA clause and an existing NDA document using a Large Language Model (LLM). The application is packaged as a Docker container and can be deployed locally or to cloud platforms.

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🧠 How It Works (Technical Architecture)

This app follows a retrieval-augmented generation pipeline consisting of:

1. 📄 PDF Text Extraction

• The NDA document is uploaded from the local path.
• Text is extracted using pdfminer.

2. Chunking (Context Window Creation)

• Extracted text is broken into overlapping paragraph-based chunks.
• This ensures contextual continuity between clauses and sections.

3. Semantic Embedding + FAISS Index

• Chunks are embedded using all-MiniLM-L6-v2 from SentenceTransformers.
• A FAISS index allows for quick similarity search between the new clause and NDA chunks.

4. Contextual Retrieval

• The new clause is embedded and compared against the stored FAISS index.
• Top k most relevant NDA sections are selected to form the context for the LLM prompt.

5. Querying the LLM (DeepSeek via Ollama)

• The new clause and retrieved NDA context are passed to a structured prompt.
• This is sent to a locally hosted DeepSeek model via the Ollama API.

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How the UI Works (Streamlit Interface)

This app is built with Streamlit and provides a clean, minimal interface for interactive legal review.

Step 1: Upload & Input Clause

• Enter path to NDA PDF (must be local).
• Paste the new clause you want to check.
• Click “Check for Conflict”.

Step 2. LLM Conflict Analysis

• PDF is processed
• The LLM:
  • Detects any conflicts
  • Explains why they occur
  • Returns a revised version of the clause
• Result is shown in valid JSON format for easy interpretation.

Features

• Local PDF parsing (no cloud storage)

• Semantic clause retrieval using FAISS + SBERT

• LLM-powered legal conflict detection

• Structured JSON output

• Locally run DeepSeek via Ollama (offline inference)

• Simple and intuitive Streamlit interface