Nigel Stephenson developed a Code Security CI workflow for the homesengland/he-pipeline-assessment repository, focusing on automated code scanning and improved release processes. He implemented a GitHub Actions workflow using YAML to enable CodeQL-based scanning on all pushes and pull requests to the main and develop branches, as well as on a scheduled basis. This integration enhanced the project’s CI/CD pipeline by providing proactive vulnerability detection and faster feedback on code quality. Nigel also updated the azure-pipelines-build-semver.yml file to increment the minor version, ensuring versioning aligned with the new security measures and supporting better governance of the release process.