Document provenance centroid.

Reference centroid family for OCR provenance and document receipt lineage.

A centroid is the mean embedding of reference data for an identity, style, domain, behavior pattern, or constraint.

Submit the domain, reference data description, embedder list, threshold idea, and intended use.

G_tau is a cosine-threshold predicate that compares an output to the frozen target. It is not a scalar reward.

Registry detail

Send the audience, data type, target task, proof bar, and sharing limits. The first pass should stay bounded.