LightRAG — Fast Graph-Based RAG

LightRAG is a graph-based Retrieval-Augmented Generation system that extracts knowledge graphs from documents for entity-relationship-aware Q&A. Outperforms naive RAG, HyDE, and GraphRAG across multiple domains.

Use when: Building document Q&A systems, knowledge bases, semantic search with graph relationships, or multimodal RAG (PDFs, images, tables).

Source: github.com/HKUDS/LightRAG (EMNLP 2025, 13K+ stars)

Setup Workflow

1. Install Dependencies

cd tools/lightrag-plus
uv sync

Installs lightrag-hku and dependencies in isolated venv.