Seraphin Costa worked on the eclipse-simrel/simrel.build repository, focusing on configuration management to align the release process with Papyrus 7.0.0 RC2 for the June 2025 release. Using XML, Seraphin updated the release configuration to ensure the Papyrus aggregator referenced the correct RC2 repository locations, thereby improving build reproducibility and reducing deployment risk. The work involved a targeted bug fix that stabilized the release pipeline by minimizing build-time inconsistencies. Although the scope was limited to a single configuration update, Seraphin’s contribution addressed a critical release alignment issue, supporting a smoother and more reliable RC2 deployment for the project.