Rule Your Platform: Leveraging Drupal's Conditions API for Modular Site Control

Drupal core's Conditions API is one of its most powerful—but often overlooked—tools for customizing behavior across complex platforms. In this session, we'll dive deep into how this API can add site-by-site flexibility without messy custom code or brittle config splits. Whether you're building a multisite platform or just want more control over when and where functionality kicks in, Conditions can be your secret weapon.

Using real-world examples from the Iowa Marketing Platform—a government-backed, multi-tenant Drupal platform—we’ll explore how to extend and implement the Conditions API to create reusable, modular logic across dozens of independent sites. You'll learn how to create custom condition plugins, how to integrate them with existing systems like block visibility, views, and access control, and how to empower site administrators without exposing them to too much complexity.

Expect practical tips, working code, and a renewed appreciation for this underused gem of Drupal core.