Stonehearth is meant to be modded. In fact, the game world itself is a mod. If you look in the
mods directory, for example, you’ll see
radiant.smod rayyas_children.smod rayyas_children_ui.smod stonehearth.smod
Each one of these .smod files are really just zipfiles containing the assets of the game and can be extracted using your favorite unzip program.
On the Stonehearth github repository there is an example mod which shows you how to go about modding.
There are several mods out there created by players which add different armors to the game as well as other objects and more. Many people use programs such as MagicaVoxel(free) and Qubicle Constructor to produce the assets necessary to add such customization as you’re longing for. While this isn’t done in game, it’s a fairly straightforward process and many of the past twitch.tv streams especially the early ones, show you how to go about adding your own assets. I am fairly certain a quick search of the forums will provide further help if you so need it. Good luck!