Before discussing version 1.0.877.1 specifically, let’s establish a baseline. Script Hook V is a library (specifically ScriptHookV.dll ) created by developer . It enables the use of custom .asi script mods in GTA V. Without it, popular mods like Simple Trainer , LSPD First Response , and Menyoo would not function.
Whenever Rockstar pushed massive overhauls like this, modders were left locked out of the game until a matching Script Hook V was compiled. Version 1.0.877.1 bridged that specific gap. Script Hook V Version 1.0.877.1