Blender files can have armature such as circles, cubes, cylinders, a dragon or any other 3D shape.
A armature can be represented as a group of vertices and data about those vertices, such as their normals or UV coordinates.
Armaturees can also have metadata, such as the name of it's parent armature (useful for vertex skinning).
blender-armature-to-json seeks to be a well tested, well documented exporter for blender armature metadata.
You can write data to stdout or to a file. At the onset it will be geared towards @chinedufn's needs - but if you have needs that aren't met feel very free to open an issue.
@see https://docs.blender.org/manual/en/dev/modeling/armature/introduction.html - Armature Introduction @see https://github.com/chinedufn/blender-actions-to-json - Exporting blender armatures / actions