Drupal at Your Fingertips

Source: drupalatyourfingertips.com Author: Selwyn Polit License: Open access documentation

When This Skill Activates

Activates when working with Drupal development topics covered in the d9book including:

• Core APIs (services, hooks, events, plugins)
• Content (nodes, fields, entities, paragraphs, taxonomy)
• Forms and validation
• Routing and controllers
• Theming (Twig, render arrays, preprocess)
• Caching and performance
• Testing (PHPUnit, DTT)
• Common patterns and best practices

---

Available Topics

All topics are available as references in the /references/ directory.

Each reference links to the full chapter on drupalatyourfingertips.com with:

• Detailed explanations and code examples
• Best practices and common patterns
• Step-by-step guides
• Troubleshooting tips

Core Concepts

• @references/services.md - Dependency injection and service container
• @references/hooks.md - Hook system and implementations
• @references/events.md - Event subscribers and dispatchers
• @references/plugins.md - Plugin API and annotations
• @references/entities.md - Entity API and custom entities

Content Management

• @references/nodes-and-fields.md - Node and field API
• @references/forms.md - Form API and validation
• @references/paragraphs.md - Paragraphs module patterns
• @references/taxonomy.md - Taxonomy and vocabularies
• @references/menus.md - Menu system

Development Tools

• @references/composer.md - Dependency management
• @references/drush.md - Drush commands
• @references/debugging.md - Debugging techniques
• @references/logging.md - Logging and monitoring
• @references/dtt.md - Drupal Test Traits

Advanced Topics

• @references/batch.md - Batch API for long operations
• @references/queue.md - Queue API for background tasks
• @references/cron.md - Cron jobs and scheduling
• @references/ajax.md - AJAX framework
• @references/javascript.md - JavaScript in Drupal

See /references/ directory for complete list of 50+ topics.

---

---

To update: Run .claude/scripts/sync-d9book.sh