Romuald Coulaud enhanced the edificeio/entcore repository by implementing broadcast group handling in message editing, ensuring BroadcastGroup entities are routed to the cci field and updating related components, models, and APIs. Using React and TypeScript, Romuald addressed critical messaging bugs by correcting total item counts during message deletion, refining draft-state logic for messages with IDs, and resetting the 'message need to save' flag after successful sends. These changes improved data integrity and user experience, particularly in CC distribution and navigation flow. The work demonstrated a focused approach to frontend reliability and API alignment within a complex messaging workflow.