There's a markdown-it plugin that implements container blocks as described: https://github.com/markdown-it/markdown-it-container https://github.com/markdown-it

There's a markdown-it plugin that implements container blocks as described: https://github.com/markdown-it/markdown-it-container https://github.com/markdown-it/markdown-it-container Not an official part of the spec, but certainly something this CMS could support since you'd just parse the markdown it saves with whatever parser you choose with your static generator.