FontoBene is a vector font format. It only uses strokes to form glyphs, in order for easy rendering in systems that cannot easily deal with more complex parts of formats like TTF or OTF (e.g. Bézier curves).
FontoBene was designed with the use case of text on printed circuit boards (PCBs) in mind. PCBs are usually manufactured using the Gerber format as an exchange format to describe the etching layers, which does not support quadratic / cubic curves.
You can find the current version of the specification at SPECIFICATION.md.
To the extent possible under law, The FontoBene Developers have waived all copyright and related or neighboring rights to The FontoBene Specifications.