This repository provides practical, executable code examples for developers looking to extend the admin interface of a popular content management system using the SlotFill system. It is designed for plugin and theme developers who need to add custom components—like buttons, panels, or forms—into predefined areas of the admin screens without directly editing core files. The examples are up-to-date and cover all available slots as of a specific major platform version.

• Working Code Examples: Each example is a fully functional plugin that you can install and run immediately to see the SlotFill system in action, providing a hands-on learning resource.
• Comprehensive Slot Coverage: The repository documents and provides examples for all standard SlotFill locations within the post editor and site editor, including those marked as experimental for advanced use.
• Local Development Setup: Includes clear instructions and npm scripts to quickly set up a local development environment using either wp-now or wp-env, allowing for immediate testing and experimentation.
• Educational Foundation: Serves as the companion code for a technical talk on extending the platform, making it an ideal resource for developers seeking to understand the practical application of the SlotFill pattern.