>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3546090. --> Reported by: [richardgaunt](https://www.drupal.org/user/3193139) Related to !869 >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>At the moment, \Drupal\ai\OperationType\Chat\ChatMessage does not have an interface.</p> <p>This object is used throughout ai modules, it would be better if we could specify an interface and pass by interface.</p> <p>Allowing custom modules to extend ChatMessage to accommodate different requirements.</p> <h4 id="summary-steps-reproduce">Steps to reproduce (required for bugs, but not feature requests)</h4> <p>Please provide information like AI modules enabled, which AI provider, browser, etc.</p> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <p>1. Specify a \Drupal\ai\OperationType\Chat\ChatMessageInterface<br> 2. Update references of `ChatMessage` to reference `ChatMessageInterface`</p>