Guillaume Rousseau focused on enhancing deployment traceability for the WTTJ/welcome-ui repository by establishing a disciplined release tagging process. Over two months, he created and documented Git tags for versions 8.0.3, 8.0.4, 8.1.1, and 8.2.1, ensuring each deployment point was clearly marked without introducing code changes. This approach improved auditability, supported rollback readiness, and aligned with release engineering standards. Guillaume utilized Git, shell scripting, and markdown documentation to standardize release naming conventions and facilitate cross-team collaboration. His work provided a robust foundation for compliance and incident investigation, though it did not involve direct feature development or bug fixes.