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CLAUDE.md

Project Overview

A DataFusion extension crate for vector similarity search (ANN) using USearch HNSW indices. Provides optimizer rules, UDFs (l2_distance, cosine_distance, negative_dot), and pluggable lookup providers (Parquet, SQLite) for retrieving non-embedding columns by key.

Git Commits

Use conventional format: <type>(<scope>): <subject> where type = feat|fix|docs|style|refactor|test|chore|perf. Subject: 50 chars max, imperative mood ("add" not "added"), no period.

Pre-Push Checklist

Always run these before pushing:

  1. cargo fmt --check — fix any formatting issues
  2. cargo clippy -- -D warnings — no warnings allowed
  3. cargo test --features sqlite-provider — all tests must pass (sqlite-provider feature needed for SQLite provider tests)