>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3538900. --> Reported by: [d34dman](https://www.drupal.org/user/751698) >>> <ul> <li>Validate edges as they are drawn to ensure compatible input/output types.</li> <li>Highlight invalid connections in real-time (e.g., red edge preview or shake animation).</li> <li>Emit a <code>workflow:validation</code> event whenever a node or edge changes state.</li> <li>Block or auto-remove invalid connections to enforce workflow integrity.</li> </ul>