How Roblox debug.setproto Actually Works for Developers

If you've been digging into the deeper, more technical side of Luau, you've probably stumbled across roblox debug.setproto and wondered what exactly it does to a function's prototype. It's one of those niche functions that doesn't get much limelight because it lives in the debug library, which is usually reserved for internal tools, custom debuggers, and low-level script manipulation. It isn't something you'll use to move a part or handle a player's inventory, but in the world of Luau internals, it's a powerhouse. ...

February 3, 2026 · 7 min · Schroeder Ortega