The case was fashioned from a chunk of cedar and made to resemble a 1930s bakelite radio. The voice assistant is powered by a ESP32 board and the electronic wiring and ESP32 YAML code all come from the example provided by JLo on his github.
As much as possible I went with the exact components that JLo listed in his instructions. The only major deviation was that I used a different brand of ESP32 board, but only because I already had one lying around. And I went with a different speaker because the one he used wouldn’t fit inside the box I wanted to make.