creational-design-patterns

name	creational-design-patterns
description	Select, implement, compare, teach, or review the five classic creational design patterns: Factory Method, Abstract Factory, Builder, Prototype, and Singleton. Use when object construction, compatible product families, complex assembly, cloning, instance lifetime, or creation coupling is the central design pressure.

Creational design patterns

Read references/patterns.md before making a recommendation or reviewing an implementation.

Workflow

1. Identify what varies: one product, a product family, assembly steps, initial state, or lifetime.
2. Establish whether a constructor, function, or dependency injection already solves the problem.
3. Choose the narrowest matching pattern and name a credible alternative.
4. Keep selection and construction at the composition boundary when possible.
5. Preserve product invariants and make ownership or lifetime explicit.
6. Test the promised variation: add a fake product, switch a family, build a variant, clone safely, or prove instance cardinality under concurrency.

Use the language's natural construction tools. A pattern's collaboration matters more than class names or inheritance.