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LeanRAG is an open-source RAG framework that uses knowledge graphs, semantic aggregation, and hierarchical retrieval to reduce redundancy in retrieval pipelines, providing grounded answers with concise evidence paths.
LeanRAG is an open-source framework that enhances Retrieval-Augmented Generation using knowledge graph structures with semantic aggregation and hierarchical retrieval for context-aware, high-fidelity responses. It has been accepted at AAAI-26.