With Markdownlint you can quickly check your own *.md files. You can use that tool for automation in your build environment.
Installation
# install via gem
$ sudo gem install mdl
# install via gem (Mac OS 10.11 - El Capitan)
$ sudo gem install -n /usr/local/bin mdl
# check version
$ mdl --version
Usage
The use of Markdownlint is very easy.
# scan a markdown file
$ mdl path/to/file.md
# scan a folder with different markdown files
$ mdl path/to/folder