flexvec: SQL Vector Retrieval with Programmatic Embedding Modulation

ArXi:2603.22587v1 Announce Type: cross As AI agents become the primary consumers of retrieval APIs, there is an opportunity to expose of the retrieval pipeline to the caller. flexvec is a retrieval kernel that exposes the embedding matrix and score array as a programmable surface, allowing arithmetic operations on both before selection. We refer to composing operations on this surface at query time as Programmatic Embedding Modulation