VIA integration with ZMK about app HOT 2 OPEN

IMO, there isn't any reason as to why it would be disallowed. The protocol that VIA communicates with isn't patented or licensed in itself. Given that ZMK is MIT licensed and QMK is GPLv2, there might be some provisions around sublicensing if you ended up lifting code directly from the QMK repo. There would be the trouble with keeping the protocol in lock-step with both QMK and ZMK, but such is the way of dependencies 🤷

In short, I would be supportive of such an initiative if there were folks on ZMK willing to build the protocol into the firmware on that side.

from app.

The biggest issue is licensing and policy:
https://zmk.dev/docs/development/clean-room

• Implementations of features for ZMK MUST NOT reuse any existing code from any projects not licensed with the MIT license.
• Contributors MUST NOT study or refer to any GPL licensed source code while working on ZMK.
• Contributors MAY read the documentation from other GPL licensed projects, to gain a broad understanding of the behavior of certain features in order to implement equivalent features for ZMK.
• Contributors MAY refer to the QMK Configurator to inspect existing layouts/keymaps for keyboards, and re-implement them for ZMK.

So while there is no technical issue with it ... unless somebody on zmk's dev team works on it, it most likely will not be implemented or accepted.

from app.