diff --git a/src/addons/lua_engine.cpp b/src/addons/lua_engine.cpp
index 71ed8986..b40654e0 100644
--- a/src/addons/lua_engine.cpp
+++ b/src/addons/lua_engine.cpp
@@ -1128,9 +1128,45 @@ void LuaEngine::registerCoreAPI() {
         "function SetPortraitTexture() end\n"
         "function PlaySound() end\n"
         "function PlaySoundFile() end\n"
+        "function StopSound() end\n"
         "function UIParent_OnEvent() end\n"
         "UIParent = CreateFrame('Frame', 'UIParent')\n"
         "WorldFrame = CreateFrame('Frame', 'WorldFrame')\n"
+        // Error handling stubs (used by many addons)
+        "local _errorHandler = function(err) return err end\n"
+        "function geterrorhandler() return _errorHandler end\n"
+        "function seterrorhandler(fn) if type(fn)=='function' then _errorHandler=fn end end\n"
+        "function debugstack(start, count1, count2) return '' end\n"
+        "function securecall(fn, ...) if type(fn)=='function' then return fn(...) end end\n"
+        "function issecurevariable(...) return false end\n"
+        "function issecure() return false end\n"
+        // CVar stubs (many addons check settings)
+        "local _cvars = {}\n"
+        "function GetCVar(name) return _cvars[name] or '0' end\n"
+        "function GetCVarBool(name) return _cvars[name] == '1' end\n"
+        "function SetCVar(name, value) _cvars[name] = tostring(value) end\n"
+        // Misc compatibility stubs
+        "function GetScreenWidth() return 1920 end\n"
+        "function GetScreenHeight() return 1080 end\n"
+        "function GetFramerate() return 60 end\n"
+        "function GetNetStats() return 0, 0, 0, 0 end\n"
+        "function IsLoggedIn() return true end\n"
+        "function IsResting() return false end\n"
+        "function IsMounted() return false end\n"
+        "function IsFlying() return false end\n"
+        "function IsSwimming() return false end\n"
+        "function IsFalling() return false end\n"
+        "function IsStealthed() return false end\n"
+        "function GetNumLootItems() return 0 end\n"
+        "function StaticPopup_Show() end\n"
+        "function StaticPopup_Hide() end\n"
+        "RAID_CLASS_COLORS = {\n"
+        "    WARRIOR={r=0.78,g=0.61,b=0.43}, PALADIN={r=0.96,g=0.55,b=0.73},\n"
+        "    HUNTER={r=0.67,g=0.83,b=0.45}, ROGUE={r=1.0,g=0.96,b=0.41},\n"
+        "    PRIEST={r=1.0,g=1.0,b=1.0}, DEATHKNIGHT={r=0.77,g=0.12,b=0.23},\n"
+        "    SHAMAN={r=0.0,g=0.44,b=0.87}, MAGE={r=0.41,g=0.80,b=0.94},\n"
+        "    WARLOCK={r=0.58,g=0.51,b=0.79}, DRUID={r=1.0,g=0.49,b=0.04},\n"
+        "}\n"
     );
 }