Juan Colonese developed a targeted CI/CD integration for the danu project within the ecmwf/downstream-ci repository, focusing on automating downstream build and test workflows. He implemented a new entry in dependency_tree.yml, configuring danu as a Python package on the master branch with its requirements path, test command, and conda dependencies. Using YAML for configuration and leveraging CI/CD best practices, Juan’s work reduced manual setup for downstream teams and streamlined the integration process. Over the course of one month, he consolidated and documented the integration point, ensuring maintainability and clarity for future contributors while delivering a focused, well-scoped feature.