Worked on the ecmwf-projects/cads-messages repository to deliver proactive maintenance communications and system status updates for CDS, ADS, EWDS, and CEMS. Focused on documentation using Markdown, the work involved detailing the April 29, 2025 maintenance window and updating configuration files to reflect potential service disruptions, such as adjusting CDS severity levels. Added new maintenance session files for ADS and CEMS to ensure consistent messaging and operational readiness. Maintained a clear and traceable commit history, supporting transparency and auditability. The approach emphasized thorough documentation practices and careful configuration management, contributing to reliable communication of planned maintenance activities across multiple systems.