Contains isolated utility functions for GUID generation, date formatting, and file size conversion. Demonstrates reusable helper patterns with minimal dependencies, safe for extraction into other projects.

Custom React hook implementing sortable lists with grip support. Encapsulates drag-and-drop reordering logic in a reusable, decoupled manner that can be applied to any list component with minimal modification.

Implements a dynamic registry for content block types (text, image, divider, etc.). Enables plugin-like extension of the block editor core without modifying existing code, demonstrating a clean extensibility pattern.

Defines the Store interface with CRUD operations for core entities (boards, blocks, users). Provides clean abstraction between application logic and data storage, allowing different implementations (SQL, mock) for testing and flexibility.

Defines the NotificationService interface for pluggable notification backends (email, Slack, etc.). Demonstrates a reusable pattern for decoupling notification delivery mechanisms from core logic.