todo-domain-expert

Validating todo domain models ensures ownership constraints, immutable fields, and state transitions are enforced consistently. This skill designs and validates todo entity structures with fields like status, priority, and user_id, applying rules for creation, updates, and archival to maintain data integrity across concurrent user actions.

Todo state management requires clear lifecycle rules for pending, completed, and archived states with defined transition paths. This skill models those transitions, enforces validation at each stage, and implements optimistic locking to prevent conflicts when multiple users modify todos simultaneously.

Ownership and immutability protect data integrity by binding todos to their creator and preventing unauthorized modifications of critical fields. This skill defines ownership constraints tied to user_id and marks fields as immutable, ensuring only authorized state transitions occur and audit trails remain trustworthy.

Yes, business rules with optimistic locking detect and prevent conflicts when multiple users update the same todo. This skill implements concurrency-safe validation and state-transition enforcement so pending and completed state changes don't collide or create inconsistent data.

A robust todo entity includes id, title, description, status, priority, due_date, created_at, updated_at, completed_at, and user_id. This skill defines the complete structure and enforces validation rules on each field to maintain consistency, enable filtering by user and status, and support accurate lifecycle tracking.