Show HN: DuckDB community extension for prefiltered HNSW using ACORN-1 https://ift.tt/meMuSZl

Show HN: DuckDB community extension for prefiltered HNSW using ACORN-1 Hey folks! As someone doing hybrid search daily and wishing I could have a pgvector-like experience but with actual prefiltered approximate nearest neighbours, I decided to just take a punt on implementing ACORN on a fork of the DuckDB VSS extension. I had to make some changes to (vendored) usearch that I'm thinking of submitting upstream. But this does the business. Approximate nearest neighbours with WHERE prefiltering. https://ift.tt/IiTWOyd March 25, 2026 at 12:28AM