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stardust

an embeddable hybrid graph-vector database in C++ that I built during the YC summer fellowship. the core idea is combining vector similarity search with labeled property graph traversals in a single engine rather than having separate vector and graph stores that need to talk to each other.

• github.com/olifog/stardust
• built on LMDB for persistence with Cap’n Proto for zero-copy serialization
• concurrent HNSW-based ANN search integrated with graph traversals
• designed for RAG pipelines where you need both vector similarity and structured relationships between documents