During April 2026, this developer enhanced the ministryofjustice/opg-event-store repository by implementing an event-driven invoicing workflow. They delivered the Invoice Created Event, designing a robust JSON schema and providing an example payload to streamline integration with downstream services. Their approach focused on API integration and event-driven architecture, ensuring that the new schema could be reliably consumed by other systems. The work prioritized repository readiness and feature completeness, with no major bugs reported during the period. By concentrating on JSON schema design and integration best practices, they laid the groundwork for smoother cross-service communication and future validation improvements.