Companion

The one vector-index name every search path must agree on. Drivine derives it as {label}_{property}_vector from the annotation, and findClusters and the schema (DDL) are wired to this same value, so all three (loadNearest, findClusters, schema) hit the same index.

The node label and embedding property the proposition vector index covers. These mirror the @VectorIndex annotation on PropositionNode.embedding, which loadNearest reads but can't be configured — so they're the canonical identity every other path derives from.