Notary

The context lie detector: it cross-examines a data catalog's claims against measured reality and writes the verdicts back.

The honest evaluation table

Twelve lies planted across five claim types, plus truthful controls. Published verbatim, misses included; the repository test suite fails if this table drifts from the command output.

The flagship catch: cents stored as dollars

Catalog description before

Catalog description after (provenance-labeled)

Findings on fct_payments

The next agent inherits the verdict

A second, independent agent session read the same asset through the stock DataHub MCP read tools. Its captured answers, side by side:

Pre-Notary catalog view (trust ledger withheld)

Same catalog, Notary trust ledger included