Making your own roblox custom thread injection script

If you've spent any significant time messing around with Luau, you've probably wondered about how a roblox custom thread injection script actually functions under the hood. It's one of those topics that sounds incredibly complex when you first hear it, but once you start peeling back the layers of how Roblox handles task scheduling and thread identity, it starts to make a lot more sense. Essentially, we're talking about forcing code to run in a specific way, often outside the normal flow that the game engine expects, or perhaps with permissions that a standard LocalScript just doesn't have. ...

February 6, 2026 · 7 min · Kelly Stegon