+1 here. The most significant change of Nethack 4 is to separate game logic into a common library named libnethack[0], so you can write your own interfaces and

+1 here. The most significant change of Nethack 4 is to separate game logic into a common library named libnethack[0], so you can write your own interfaces and communicate with server using JSON. [0]: https://github.com/tsadok/nethack4/tree/master/libnethack https://github.com/tsadok/nethack4/tree/master/libnethack