Don't track parented NPCs either

lua/cfw/core/parenting_sv.lua

@@ -56,6 +56,7 @@ hook.Add("Initialize", "CFW", function()
             if self._cfwRemoved then return end -- Removed by an undo
             if oldParent == newParent then return end
             if (validOldParent and oldParent:IsPlayer()) or (validNewParent and newParent:IsPlayer()) then return end
+            if (validOldParent and oldParent:IsNPC()) or (validNewParent and newParent:IsNPC()) then return end
             if filter[self:GetClass()] then return end
 
             if validOldParent then disconnect(self, oldParent:EntIndex(), isParent) end

lua/weapons/gmod_tool/stools/cfw_tool.lua

@@ -2,7 +2,6 @@ TOOL.Category	= "Contraption Framework"
 TOOL.Name		= "CFW Tool"
 TOOL.AddToMenu	= false
 
-
 --[[
 	To access this, use 'gmod_tool cfw_tool'
 	Hidden because this relies on developer 1, so not for use by normal means, for now
@@ -17,7 +16,6 @@ TOOL.AddToMenu	= false
 	When this happens, maybe allow normal use of the tool as well?
 ]]
 
-
 TOOL.Entity		= nil
 
 function TOOL:LeftClick(tr)
@@ -50,6 +48,7 @@ function TOOL:Think()
 	local tick = engine.TickInterval() + 0.05
 
 	local Rendered = {}
+
 	for _, link in pairs(selftbl._links) do
 		local entA, entB = link.entA, link.entB
 		debugoverlay.Line(entA:GetPos(),entB:GetPos(),tick,link.color,true)
@@ -64,9 +63,6 @@ function TOOL:Think()
 			debugoverlay.Text(entB:GetPos(),"B",tick,false)
 			Rendered[entB] = true
 		end
-
-
-
 	end
 end