Stacy Hayes contributed to the alphagov/govuk-infrastructure and alphagov/publisher repositories, focusing on release governance and content management enhancements. For govuk-infrastructure, Stacy implemented a publishing readiness workflow for the Nokodiff Ruby gem, integrating configuration management and DevOps practices to enforce CI gatekeeping and secure, auditable releases. In the publisher repository, Stacy enhanced the artefact type system by introducing new artefact kinds with slug prefixing, refining validation logic, and updating both front end and back end flows using Ruby on Rails, JavaScript, and YAML. The work demonstrated depth in integration testing and improved reliability for content authors and CI pipelines.