OpenFable: Open-Source RAG Engine Using Tree-Structured Indexes

Summary

OpenFable is a new open-source retrieval-augmented generation (RAG) engine that uses tree-structured indexes rather than conventional flat vector store approaches. The project, shared as a Show HN submission on Hacker News, is hosted on GitHub under the repository alainbrown/openfable. Details from the repository page are limited in the available content, but the core proposition centers on organizing document embeddings in a hierarchical tree structure to improve retrieval quality and efficienc