Flat

Brute-force (exact) vector search — no graph/cluster approximation.

When to use

• Small corpora where exactness matters more than ANN speed
• Baselines and correctness checks against approximate indexes

ZVec.NET mapping

Concern	Type / API
Build params	ZVecFlatIndexParam
Query params	ZVecFlatQueryParams

Pitfalls

• Query cost grows linearly with corpus size
• Fine for demos and the binding benchmark suite (10k Flat); not a substitute for HNSW/IVF at million scale

Upstream

• zvec.org
• Theory: metrics