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AnnIndex

lean_ctx::core::hnsw

Struct AnnIndex 

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pub struct AnnIndex { /* private fields */ }
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Approximate nearest neighbor index using HNSW for large datasets, with brute-force fallback for small ones.

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impl AnnIndex

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pub fn build(vectors: Vec<Vec<f32>>) -> Self

Build the index from a set of vectors.

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pub fn search(&self, query: &[f32], top_k: usize) -> Vec<(usize, f32)>

Search for the top-k nearest neighbors of a query vector. Returns (index, similarity) pairs sorted by descending similarity.

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