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grasp-knowledge

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GRASP principles knowledge base for PHP 8.4 projects. Provides quick reference for 9 responsibility assignment patterns (Information Expert, Creator, Controller, Low Coupling, High Cohesion, Polymorphism, Pure Fabrication, Indirection, Protected Variations). Use for architecture audits and design decisions.

skills/grasp-knowledge/SKILL.md

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# GRASP Principles Knowledge Base

## Overview

GRASP (General Responsibility Assignment Software Patterns) provides guidelines for assigning responsibilities to classes and objects in object-oriented design.

| Principle | Core Question | Goal |
|-----------|---------------|------|
| **Information Expert** | Who has the data? | Assign to class with information |
| **Creator** | Who creates objects? | Assign creation responsibility |
| **Controller** | Who handles system events? | Coordinate use case flow |
| **Low Coupling** | How to reduce dependencies? | Minimize interconnections |
| **High Cohesion** | How to focus responsibilities? | Keep related things together |
| **Polymorphism** | How to handle type variations? | Use polymorphic operations |
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