So at first I misunderstood your tool, thinking it was like a tool I made a little over a year ago that creates new fonts from existing font glyph paths, combining them in a couple of ways. It began as an ambigram generator (png image) using an arbitrary ttf or woff of your choosing and once I had that working, I realized that since I was just transforming vector paths, I could mix paths from multiple fonts, still focusing on ambigram generation.

Eventually, scope crept until it became an interesting and useful thing to be able to combine say, the top half of Arial with the bottom half of Times New Roman's letters (and combine with various boolean operations on the paths, with outlines, etc, and I assumed others would be as pleased with this ability as I was, so I documented some examples and shared it here and in a fontography subreddit.

To my surprise, it got essentially no interest when I posted here, and the response from the typography folks was basically negative with people somehow framing it as a piracy-adjacent thing, and not a fun thing to do, just mashing up vector paths to get interesting unique results. shrug

Seems like you and maybe some other participants in this discussion might actually appreciate this little tool and get some enjoyment and perhaps utility out of it, so I'll share it here. https://github.com/scottvr/fambigen

There are examples in the README that show what it does in ambigram mode or "font compositor" mode. Enjoy!