What exactly is Kimera core?

[online]

I want to make a full size with split spacebar keyboard that needs pins for all rows and columns as well as all indicator lights, backlight and underglow.

Kimera core seems to be the easy option, but what exactly is it? I've searched around but only found xd84 and golbat posts.

Where can I buy them? is there a schematic I can use as a reference for integrating to the keyboard PCB?

[yangdigi]

hardware: https://github.com/kairyu/kimera
firmware: use https://tkg.io/ or compile it yourself:https://github.com/kairyu/tmk_keyboard_custom/tree/master/keyboard/kimera

buy one: https://item.taobao.com/item.htm?id=520582041040.