Autodesk Revit Model Review provides a plugin mechanism for a software developer to write new checks which are not available in the out-of-the-box product for Revit 2010 and higher.
Plugins have the same capabilities and behaviors as any other check in Model Review, and can use the full power of the Revit API to produce them.
Documentation for developing plugins can be found in the Developing_Model Review_Plugins.pdf file located in C:\Program Files\Autodesk\Revit Model Review <release>\Plugin-Source. A sample Microsoft Visual Studio Project can also be found in that location.