Salesforce recipe
Object scaffolds back to Salesforce
Governed model in, Metadata-API CustomObject XML out - deployed only by you.
Import your org, audit it, then generate one objects/{ApiName}.object CustomObject XML scaffold per governed Type: restricted-picklist valueSets from taxonomies, Lookups from governed references, required from NotNull, governed-first fields minted with the __c suffix. Review-and-deploy scaffolds for your org's normal change process - CoreModels never deploys to your org.