Meridian Line wants its GenAI development team to freely experiment with prompts and chain designs against a copy of production charter data, without any risk that a half-finished experimental chain could accidentally be invoked by the production charter-desk application. How should this be structured in Unity Catalog?

Unity Catalog's catalog.schema.object namespace is the natural isolation boundary for separating environments, so giving development its own catalog, or at minimum its own schema, from production means experimental tables, indexes and registered models simply live at different fully-qualified names than anything the production charter-desk application references, which makes accidental invocation structurally impossible rather than merely discouraged. Registering every experimental version to the same production model name means the production application's alias or version pointer could be repointed to an experimental version by a mistake in deployment tooling, since they share the same identity, this is exactly the collision the isolation is meant to prevent. Sharing the production service principal's credentials with developers is a governance failure on its own terms, it grants development-time access equivalent to the production identity, undermining the separation of privilege between experimentation and the live serving path regardless of what namespace anything lives in. Storing experimental data outside Unity Catalog in personal cloud storage forfeits governance, lineage and access control entirely for the development phase, and reintroduces the ungoverned-data problem the rest of the platform is built to avoid. Exam framing: catalog and schema separation in Unity Catalog is the primary mechanism for environment isolation, dev versus prod, in this governance model.