> ## Documentation Index
> Fetch the complete documentation index at: https://docs.medera.info/llms.txt
> Use this file to discover all available pages before exploring further.

# Hybrid Search

> Semantic + lexical retriever with rank fusion

The hybrid retriever runs vector index semantic search and lexical retriever keyword search in parallel, then fuses with reciprocal rank fusion (RRF) and reranks the top-K with a clinical reranker. Method: `hybrid_search(query: str, k: int = 5)`.