diff --git a/inventoryManager.lua b/inventoryManager.lua
index 1ee6449..927cfaf 100644
--- a/inventoryManager.lua
+++ b/inventoryManager.lua
@@ -3423,10 +3423,12 @@ local function main()
             end
         end,
 
-        -- Task 10: Network state broadcast
+        -- Task 10: Network state broadcast (skips if nothing changed)
         function()
             while true do
-                pcall(broadcastState)
+                if stateVersion ~= lastBroadcastVersion then
+                    pcall(broadcastState)
+                end
                 sleep(BROADCAST_INTERVAL)
             end
         end,
@@ -3471,6 +3473,7 @@ local function main()
                         pcall(broadcastState)
                     elseif message.type == "scan" then
                         print("[NET] Scan request from client")
+                        configDirty = true  -- resend full config after scan
                         pcall(refreshCache)
                         pcall(checkAlerts)
                         needsRedraw = true
@@ -3480,6 +3483,7 @@ local function main()
                         smeltingPaused = not smeltingPaused
                         print("[NET] Smelting " .. (smeltingPaused and "PAUSED" or "RESUMED"))
                         saveDisabledRecipes()
+                        bumpStateVersion()
                         smelterNeedsRedraw = true
                         needsRedraw = true
                         pcall(broadcastState)
@@ -3491,12 +3495,16 @@ local function main()
                         end
                         print("[NET] Recipe toggle: " .. message.recipe)
                         saveDisabledRecipes()
+                        configDirty = true
+                        bumpStateVersion()
                         smelterNeedsRedraw = true
                         pcall(broadcastState)
                     elseif message.type == "enable_all" then
                         disabledRecipes = {}
                         print("[NET] All recipes enabled")
                         saveDisabledRecipes()
+                        configDirty = true
+                        bumpStateVersion()
                         smelterNeedsRedraw = true
                         pcall(broadcastState)
                     elseif message.type == "disable_all" then
@@ -3505,6 +3513,8 @@ local function main()
                         end
                         print("[NET] All recipes disabled")
                         saveDisabledRecipes()
+                        configDirty = true
+                        bumpStateVersion()
                         smelterNeedsRedraw = true
                         pcall(broadcastState)
                     elseif message.type == "sort_barrel" and message.barrelName then