Badge PageIndex argues that similarity is not the same as relevance, and it offers a vectorless, reasoning based approach to retrieval that builds a hierarchical page index and uses LLM-driven tree search to find the most relevant sections. The claim is bold, it reports 98.7% on FinanceBench, and the repo is worth a close look if you work with complex documents. Repository snapshot and example...
How to Use PageIndex for Vectorless RAG on Complex Documents
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