PCB board traces and soldering pads output

[Supermagnum]

Since the position of the holes for the switches is known, there should be possible to add a utility that places the footprints of the switches on a flexible PCB according to the geometric layout of the keyboard halves.
0.6 mm thick pcb may also be used if its flexible enough.
Reference: http://www.cy384.com/blog/flex-pcbs.html

Output to pdf file or *.KICAD_PCB as its easy to manipulate so LED connections and so on can be added.

Kicad has a python API:
https://docs.kicad-pcb.org/master/en/plugins/plugins.html

pcb file format:
https://dev-docs.kicad.org/en/file-formats/sexpr-pcb/