eventmodeling-validating-event-models

To validate an event-sourced model, you must review event streams, command-state projections, and role-based access control to ensure strict compliance with minimal state projection patterns and explicit command-to-event mapping.

Command validation should avoid DDD aggregate roots because every command requires its own minimal state projection to enforce architectural integrity, and using aggregates creates an anti-pattern that breaks event sourcing consistency.

To check for missing events during a design review, perform a completeness analysis that rigorously verifies event streams, command-event mappings, and role-based actor attribution to identify any business logic gaps.

The best way to ensure proper role attribution in CQRS is to verify that all commands are explicitly mapped to roles defined within your Role Catalog during the completeness analysis phase.

Yes, you must use minimal state projections for command validation in domain-driven design, as this enforces determinism and prevents the anti-pattern of relying on DDD aggregate roots for validation logic.