datastax/graph-rag

Combines vector similarity search with metadata relationship traversal by wrapping existing vector stores to expose graph navigation capabilities. Provides both a generic `graph-retriever` library and LangChain integration (`langchain-graph-retriever`) that define edges between nodes—such as mapping mentions to entity IDs or linking nodes sharing common entities. Enables multi-hop retrieval without migrating data, leveraging the metadata search functionality already built into vector stores like AstraDB.

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