composition-over-inheritance

What problem does it solve?

Inheritance creates tight coupling and rigid hierarchies. This Skill promotes composition to build flexible, reusable components that can be mixed and matched.

Core Features & Use Cases

• Encourages defining capabilities as interfaces or small composable units and injecting them into classes instead of extending concrete parents.
• Helps restructure class relationships by extracting shared behavior into composable components.
• Use Case: convert an is-a inheritance hierarchy into a set of behaviors that can be combined to form diverse objects.

Quick Start

Define small, reusable capabilities as interfaces or simple objects; compose them into concrete classes by wiring the behaviors; and gradually refactor existing inheritance-heavy code to rely on composition.