Building TP-Link archer c6 v4 Firmware

Hey there, I am starting to build a firmware for TP-Link Archer C6 V4. If you guys have any suggestions or recommendations to add, please let me know. Am new to this development. Any kind of help will be appreciated

Read warnings at the top of page -
https://openwrt.org/toh/tp-link/archer_c6_v3

Thanks for sharing. Let me go through the files anyways. How did TP-link created a firmware that fits into it anyways, there should be a way

They bought vxworks system