fbrctr.github.io | This is the Fabricator instance used to build http : //fbrctr

The author (@lukeaskew) responded to my email inquiry and indicated that all 'front-matter' data gets packed up into data (accessible as {{data}} or {{{data}}}), and to access or check the 'styles' data I was initially trying to add, I could simply enter {{{data.styles}}} in my f-item-contents & f-item-controls files.

If that doesn't work for you for some reason or if you want a truly independent data section, you can follow the instructions as I've laid out below.

I figured out how to add control (content toggles) to Fabricator - hopefully this will help someone else.

For starters, I'm not certain, but I suspect that styles (the name I gave to my custom control) may be a reserved word, because having it in the fabricator.js file periodically causes the gulp task to stop running/fail. Unfortunately, (as of this posting) there's still no indication in the docs what the reserved words are other than that there's a list of reserved words.

To add a control, in addition to the steps indicated in my question, you also need to modify the node_module that assembles the site from the src folder.

The file is located in your Fabricator folder at node_modules/fabricator-assemble/index.js and you'll need to modify the following section (LINE ~332), replacing 'NEW_TOGGLE_NAME' with the name of your new control (same name you used in the sections mentioned in my question):