Earlier quoted context omitted.
That's not a markdown problem. Its a consequence of using markdown within a framework, generator, etc that uses frontmatter or an equivalent to define meta data. Several frameworks and tools allow for markdown and static site rendering that also support an admin UI where one can define this data more easily.
also support an admin UI where one can define this data more easily. I'm looking for one such or a couple, can you enumerate?
- prose.io
- siteleaf.com
- statamic.com
- getkirby.com
- github.com/jekyll/jekyll-admin
- github.com/netlify/netlify-cms
- federalist.18f.gov
You can also always build your own on top of whatever generator you want to use (example: http://willschenk.com/building-a-gui-for-managing-middleman-...).
My favorite setup though is middleman + contentful + codeship. Static site generation happens with middleman. Content management happens with Contentful. Publishing happens with codeship.