Go to your new theme's root:

  $ cd themes/mytheme/

Initialize npm if you haven't yet.

  $ npm init

Then add toomanynames_theme as a dependancy:

  $ npm i --save toomanynames_themes

To add the toomanynames_theme styling, import the css/toomanynames_base file found in the npm package into your main styling file.

For example, if your theme styling looks like this:

mytheme/
|-- layout/
|-- node_modules
|-- source/
    |--css/
      main.styl

Then, add the following line in main.styl

@import "../../node_modules/toomanynames_theme/source/css/toomanynames_base

You don't need to do anything more to access the toomanynames partials. If you had a file like layout/index.ejs in your main theme, you could just do this:

<%- partial('_partial/navigation') %>

This will first look for definitions of partial in your local partials, if not in there it will grab it from toomanynames_theme.