magento2-dev-core

# Magento 2 Developer Core This skill provides the foundational patterns all Magento 2 developers must follow. It covers architectural decisions, security, and best practices that apply to every part of a Magento project. ## Related Skills This is the foundation the other Magento 2 skills build on: `magento2-frontend-dev` and `magento2-hyva-dev` cover the two mutually exclusive theme stacks (check the theme's `theme.xml` parent to see which one the project actually uses — Luma vs Hyvä), `magento2-backend-dev` covers APIs/CLI/cron, and `magento2-linter`, `magento2-security-scan`, `magento2-performance-audit` verify the patterns below. In a Govard environment, pair this with `govard-magento` for the container/CLI side. ## Core Architectural Standards ### Dependency Injection (DI) **DO**: Use Constructor Injection for all dependencies. ```php class MyService { public function __construct( private readonly ProductRepositoryInterface $productRepository, private readonly LoggerInterface $logger ) {} public function getProduct(int $id): ?ProductInterface { return $this->productRepository->get($id); } } ``` **NEVER**: Use `ObjectManager::getInstance()` (Service Locator anti-pattern). ```php // WRONG - Never do this $objectManager = \Magento\Framework\App\ObjectManager::getInstance(); $product = $objectManager->create(Product::class); // CORRECT public function __construct(ProductFactory $productFactory) { $this->productFactor...