design-patterns

name	design-patterns
description	Software design patterns catalog including creational (Abstract Factory, Builder, Factory Method, Singleton), structural (Adapter, Decorator, Facade, Proxy), behavioural (Chain of Responsibility, Mediator, Observer, Strategy, Specification), and architectural patterns (Repository, Strangler Fig, Domain Events, Rules Engine). Use when choosing patterns, implementing specific designs, or evaluating pattern trade-offs.
license	MIT
metadata	{"author":"itzcull"}

Purpose

Provide a reference catalog of software design patterns with implementation guidance, trade-offs, and practical examples. Based on the Gang of Four patterns and extended with modern architectural patterns.

When to use

• Choosing a design pattern for a recurring problem
• Implementing a specific pattern
• Evaluating whether a pattern is appropriate for a situation
• Understanding trade-offs between similar patterns
• Refactoring code to use established patterns
• Code review discussions about pattern usage

Pattern catalog

Creational

Abstract Factory, Builder, Factory Method, Singleton, Object Mother

Structural

Adapter, Decorator, Facade, Proxy

Behavioural

Chain of Responsibility, Mediator, Memento, Null Object, Observer, Specification, Strategy

Architectural / Domain

Domain Events, Repository, Rules Engine, Strangler Fig

Reference files

• Overview and full catalog
• Individual patterns documented in references/