/*use this file to add all your third party library externs(the bits in your api you do not want renamed by the closure compiler)*/ /*use this file to your current library externs(the bits in your api you do not want renamed by the closure compiler)*/ {} {} Your handlebar context information for handlebars goes in ${src.dir.file.handlebars.hash} as a JSON string. Your handlebar partials information for handlebars goes in ${src.dir.file.handlebars.partial} as a JSON string. You can also add entire files containing handlebar partials to parse within separate *.hbs files but these need to be included inside the partials folder. The name of the partial is the filename less extension eg: base.hbs ( the name of this partial is base ). Your handlebar base template information for handlebars goes in ${src.dir.handlebars.partials}. The handbar base template is going to be inherited by all your pages where you would override values in this base template in each of your pages. You don't have to do anything ofcourse. The build script takes care of everything else.