At what point have you just forked yourself in the same repo?

Edit: actually that’s basically what it is

At the moment, TrinityCore supports 3 main branches:

3.3.5 targeting original 2010 wow 3.3.5a, you need wow 3.3.5a.12340 client for it to run, wotlk 3.4 client is incompatible. best for starters

cata_classic targeting 2024 wow 4.4 retail cata classic, you need wow 4.4.x client for it to run, cata 4.3.4 client is incompatible. very beta

master usually targeting current retail version. a lot of missing content