diff --git a/inventoryManager.lua b/inventoryManager.lua
index 0c74b9c..1b9bcde 100644
--- a/inventoryManager.lua
+++ b/inventoryManager.lua
@@ -3351,7 +3351,19 @@ local function main()
             end
         end,
 
-        -- Task 11: Network order/command listener
+        -- Task 11: Peripheral detach handler (invalidates cached handles)
+        function()
+            while true do
+                local event, name = os.pullEvent("peripheral_detach")
+                if name then
+                    invalidateWrapCache(name)
+                    invalidatePeripheralCaches()
+                    print("[DETACH] " .. name)
+                end
+            end
+        end,
+
+        -- Task 12: Network order/command listener
         function()
             if not networkModem then return end
             while true do