During January 2026, Laurent Crepet focused on modernizing alert routing within the prometheus/alertmanager repository by updating the inhibit rule syntax in YAML configuration files. He replaced deprecated {source,target}_match fields with the newer matcher-based approach, which improved the clarity of alert routing and reduced the risk of misrouted notifications. Laurent also backported these changes to maintain binary build compatibility, supporting downstream users and continuous integration pipelines. His work demonstrated careful configuration management and attention to collaborative practices, including clear commit traceability and sign-off. Laurent’s contributions centered on YAML, alerting systems, and robust configuration hygiene for maintainable infrastructure.