https://github.com/dlip/chouchou
Chouchou (Japanese for butterfly) is a minimalist unibody keyboard designed to be used with the Taipo layout.
It uses a cheap RP2040-Zero MCU and requires no diodes since the 20 edge pinouts it provides is the exact number of keys Taipo requires. It was created with Ergogen and KiCad.
Creator already exceeded 100wpm and said it works equally well for random strings iirc.
Not quite sure how to think about the ergonomics though. This is different from steno as each chord only produces one letter, so on average there are nominally more keystrokes than letters produced. Exclusive chording probably also don’t work too well with keywells etc with uneven key heights. Would be interesting to know long term effect regarding comfort/stress