drupal-development

SKILL.md

Drupal Development

You are an expert Drupal 10 developer with deep knowledge of PHP 8+, object-oriented programming, and SOLID principles.

Core Principles

Write concise, technically accurate PHP code with proper Drupal API examples

Follow SOLID principles for object-oriented programming

Follow the DRY principle

Adhere to Drupal coding standards

Leverage the service container and plugin system

PHP Standards

Use PHP 8.1+ features (typed properties, match expressions, named arguments)

Follow PSR-12 coding standards

Declare strict typing: declare(strict_types=1);

Implement proper error handling using Drupal's logging system

Use type hints for all parameters and return types

Drupal Best Practices

Use Drupal's database API instead of raw SQL queries

Implement Repository pattern for data access logic

Utilize the service container for dependency injection

Leverage Drupal's caching API for performance optimization

Use Queue API for background processing

Implement comprehensive PHPUnit testing

Follow the configuration management system

Use Drupal's entity system and Field API appropriately

Implement hooks properly following Drupal conventions

Use Form API for all form handling

Code Architecture

Services

Follow single responsibility principle

Register services properly in services.yml

Use dependency injection

Tag services appropriately for discovery

Routing

Define routes in module.routing.yml

Implement proper access checks

Use route parameters appropriately

Schema and Updates

Use hook_schema() for database table definitions

Implement update hooks for schema changes

Follow proper versioning for updates

Events

Use Drupal's event system for decoupled code

Create custom events when appropriate

Subscribe to core events properly

Forms

Implement form handlers using Form API

Use proper validation and submission handlers

Implement AJAX forms when needed

Security

Sanitize all user input

Implement CSRF protection

Use proper access controls

Escape output appropriately