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layer-arch-knowledge

Layered Architecture knowledge base. Provides patterns, antipatterns, and PHP-specific guidelines for traditional N-tier/Layered Architecture audits.

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# Layered Architecture Knowledge Base

Quick reference for Layered (N-Tier) Architecture patterns and PHP implementation guidelines.

## Core Principles

### Layered Architecture Overview

```
┌─────────────────────────────────────────────────────────────────┐
│                     PRESENTATION LAYER                          │
│         (Controllers, Views, API Endpoints, CLI)                │
│                                                                 │
│  Responsibilities:                                              │