>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3538892. --> Reported by: [d34dman](https://www.drupal.org/user/751698) >>> <p> In this phase, we define the primary communication layer between the Svelte-based workflow editor and Drupal.<br> The main focus will be a JavaScript event-driven API to handle node interactions, workflow changes,<br> and execution triggers. REST/JSON:API endpoints will be optional and secondary to the in-browser event system. </p> <h4>Deliverable</h4> <ul> <li>Fully defined JavaScript event-driven API for workflow lifecycle.</li> <li>Optional REST endpoints for persistence and execution.</li> <li>Autosave and execution capabilities wired into the event bus.</li> <li>Editor able to function offline or without immediate backend integration.</li> </ul>