If you look at any up to date mod, you'll find in the folder a small file called metadata.yml. Here's my example (from X-Com Files):
name: "X-Com Files"
version: "0.6.4"
author: "Solarius Scorch"
description: "From a humble UN agency to the paramilitary superpower that we know, in the vain of the 90's sci-fi paranoia TV series and 80's horror movies."
id: x-com-files
master: xcom1
This info is seen in the mod description in the game. Plus, the master determines that this mod is for X-Com 1 (not TFTD).