>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3538815. --> Reported by: [d34dman](https://www.drupal.org/user/751698) >>> <ul> <li>Ensure <del>NodeType.processor_plugin</del><code>FlowDropNodeType.executor_plugin</code> maps to valid <code>FlowDropNodeProcessor</code> plugin IDs.</li> <li>Add validation on NodeType save to confirm the processor plugin exists.</li> <li>Expose plugin metadata to the frontend API for UI node palette generation.</li> </ul>