ModelForge/docs/architecture/adr/0037-migration-validation-and-rollback-retention.md

ADR-0037: Migration validation and rollback retention

Status

Accepted in M13 on 2026-08-26.

Decision

Cutover requires an immutable validation snapshot. Technical LAB eligibility and project-production eligibility are separate. The exact prior external identity is snapshotted before switch and remains cleanup-blocking through the configured rollback window.

Consequences

Completeness alone cannot promote a model. Isolated mechanics can be rehearsed despite documented project evidence gaps, without implying production fitness or sacrificing rollback evidence.