Pedro Oliveira enhanced the apache/nifi project by implementing robust WebSocket disconnection handling within the ConnectWebSocket processor. He introduced a new disconnected relationship, a WebSocketDisconnectedMessage type, and a dedicated listener to manage disconnection events, all designed to improve downstream processing continuity during WebSocket outages. His approach emphasized maintainability and reliability, with expanded test coverage to validate the new event-driven behavior. Working primarily in Java and leveraging skills in API design, backend development, and testing, Pedro’s contributions focused on clear signaling of disconnect events, ensuring the system could gracefully handle interruptions without major bug fixes required during this period.