SFMC DevTools (mcdev)
CLI to retrieve, deploy, and version Marketing Cloud Engagement metadata as code across business units.
Engagement
mcdev (Accenture open source, maintained with community contributions) is the de-facto CI/CD toolchain for Engagement metadata: retrieve, deploy, clone, and document business-unit configuration from the command line.
Pair it with SFMC DevTools for VS Code for a graphical workflow and eslint-plugin-mcdev to surface .mcdev-validations.js rules in the editor and CI.