Pantheon release notes

The latest update to the Pantheon Advanced Page Cache Drupal module includes a change regarding module compatibility to ensure the best performance for your site.

Key Update

The BigPipe module is fundamentally incompatible with the architecture of Pantheon's Global CDN and the functionality provided by Pantheon Advanced Page Cache module. To improve site reliability, the module will now automatically disable BigPipe when Pantheon Advanced Page Cache is enabled.

If the BigPipe module is somehow enabled after PAPC is installed, a clear error message will now be displayed on the Drupal Status Report page (/admin/reports/status).

This warning clearly highlights the fatal incompatibility and the risk of site errors.

The following updates are now available for Content Publisher:

• New release of the Pantheon Content Publisher v1.0.3 Drupal module now availabe.
• With Approval Workflows enabled, Administrators now have the option to Approve submissions direclty from the Pending approval tab of a Collection in the Content Dashboard. Previously, opening each submission in Preview mode was required.
• The experience for Smart Components has been improved for first time users.
• Upgrade Content Publisher AI metadata suggestion to use Gemini 2.5 flash instead of Gemini 2.0.
• Bug fix for our Next.js starter kit and SDK to properly support Next.js 15.5 and the use of App Router. Improve the build process by using pinned versions of dependencies.
• Fix several event tracking issues in the back-end.

All WordPress plugins and Drupal modules actively maintained by Pantheon have been confirmed to be compatible with PHP 8.4. Most did not require any code updates to be compatible, so they did not receive a version bump.

• Pantheon Advanced Page Cache (WordPress)
• Pantheon WordPress mu-plugin
• WP Redis
• WP Native PHP Sessions
• WP SAML Auth
• Pantheon HUD
• Search API Pantheon
• Pantheon Advanced Page Cache (Drupal)
• Pantheon Content Publisher (Drupal)

PHP 8.4 is now available on the Pantheon platform. Learn more about the release.

The latest update to the Pantheon Advanced Page Cache Drupal module focuses on improving the functionality of the surrogate key header limit in your local development environment.

Key Update

Surrogate Key Header Limit Adjustment: To prevent oversized response headers and enhance the ease of work in your local environment, developers now have the ability to override the surrogate key header limit.

By default, the limit is set to 25,000 bytes. It can be adjusted by adding the following line to your site's settings.php file:

Please note that the maximum value for this setting is capped at 25,000 bytes. Adjust the value as needed to suit your local development requirements.

Today we are releasing v1.0 of Pantheon Content Publisher's Drupal module - a new contrib module for Drupal sites. This new module replaces the previous module that was used by earlier participants of the private beta program.

What's new?

This release marks a complete redesign of the Drupal integration for Content Publisher, and offers new functionality:

• Manages content as standard Drupal entities, rather than relying on Drupal Views for rendering.
• Metadata fields are now converted into standard Drupal configured fields.
• Search API support has been added, allowing Content Publisher content to be searched by Drupal with blended results alongside other Drupal content.
• Smart Components from Google Docs get represented as fieldable Drupal entities.
• Increased reliability for real-time previews.
• Improved configuration panel.

Learn More

While this module is now available on Drupal.org, it still requires access to the private beta program in order to be leveraged.

• Request beta access
• Docs: Content Publisher for Drupal: Getting Started Guide
• Blog: Enhanced Drupal Integration for Content Publisher
• See the Content Publisher release notes for a more detailed history of changes

The Pantheon Advanced Page Cache and Search API Pantheon modules have been updated to support Drupal 11. This enhancement enables you to confidently launch and manage Drupal 11 sites using these optimized modules.

What's New?

• Drupal 11 Compatibility: Both modules have been tested and updated to ensure seamless integration with Drupal 11, providing enhanced performance and reliability.

Action Required

To take advantage of these updates, please ensure your modules are updated to the latest versions:

• Pantheon Advanced Page Cache: Version 2.3.2
• Search API Pantheon: Version 8.3.1

We recommend reviewing the release notes for each module to understand the specific changes and improvements.

The Pantheon Advanced Page Cache Module has received an update in the 2.2.0 release which resolves Issue #3337669 and provides some additional enhancements. Now, when any file is updated inside the Drupal File system, that file will have its edge cache cleared immediately and new content will be shown.

Some Technical Details:

• The cache clearing is specifically triggered by any action which invokes the update file hook.

• If the file is an image, all image styles will also have their edge cache entry cleared.