Cyber Engine Tweaks (CET) is a Windows DLL plugin (ASI) for Cyberpunk 2077 that provides a Lua scripting environment, an in-game Dear ImGui overlay, and a suite of developer tools for modding. It hooks into the game's DirectX 12 renderer and RED4ext runtime to expose internal game systems (RTTI, TweakDB, singletons, functions) to Lua scripts. The architecture is a singleton orchestrator (CET) that owns subsystems: a Lua VM (sol2 + LuaJIT), an ImGui overlay with dockable widgets (Console, TweakDB Editor, Settings, Bindings, Game Log), a raw input binding system, a persistent state manager, and a set of memory patches (disable vignette, boundary teleport, etc.). Mods are placed in a designated folder and can register callbacks for game events, create UI, manipulate game data, and override game functions via a hooking chain.