postgres-json-schema allows validation of JSON schemas in PostgreSQL. It is implemented as a PL/pgSQL function and you can use it as a check constraint to validate the format of your JSON columns.
Part of the CSOAI Layer-0 legacy-bridge family (sibling of cobol-bridge-mcp). Bridge Oracle PL/SQL legacy to ONE OS — parse, map, govern (SOX / GDPR / DORA).