Worked on the ecmwf/downstream-ci repository to deliver CI integration for the Plume Extreme Events plugin, focusing on expanding automated validation within downstream pipelines. The work involved adding the Extreme Events plugin to the CI dependency tree and configuring end-to-end validation during pull request and merge workflows. Using YAML for configuration management and leveraging CI/CD best practices, the integration improved test coverage and reduced release risk by ensuring the plugin is automatically tested as part of the continuous integration process. This approach enhanced the reliability of downstream pipelines and contributed to higher release quality without introducing new bugs during the period.