diff --git a/manager/config.lua b/manager/config.lua
index 7ac44b4..13f76cf 100644
--- a/manager/config.lua
+++ b/manager/config.lua
@@ -53,6 +53,17 @@ C.COMPOST_RESERVE    = 128
 C.COMPOST_DROPPER    = "minecraft:dropper_10"
 C.COMPOST_HOPPER     = "minecraft:hopper_0"
 
+-- Stock limits / auto-discard (overridable via config file)
+C.TRASH_DROPPERS     = {             -- droppers facing lava/void for destroying excess items
+    "minecraft:dropper_11",
+    "minecraft:dropper_12",
+    "minecraft:dropper_13",
+    "minecraft:dropper_14",
+    "minecraft:dropper_15",
+    "minecraft:dropper_16",
+}
+C.DISCARD_INTERVAL   = 5            -- seconds between discard checks
+
 -- Peripheral
 C.PERIPHERAL_CACHE_TTL = 5
 
@@ -113,6 +124,13 @@ function C.loadConfig()
     if cfg.compostReserve     then C.COMPOST_RESERVE      = cfg.compostReserve     end
     if cfg.compostDropper     then C.COMPOST_DROPPER      = cfg.compostDropper     end
     if cfg.compostHopper      then C.COMPOST_HOPPER       = cfg.compostHopper      end
+    if cfg.trashDroppers      then C.TRASH_DROPPERS       = cfg.trashDroppers      end
+    if cfg.discardInterval    then C.DISCARD_INTERVAL     = cfg.discardInterval    end
+    if cfg.stockLimits        then
+        for item, limit in pairs(cfg.stockLimits) do
+            C.STOCK_LIMITS[item] = limit  -- merge / override per-item
+        end
+    end
     if cfg.parallelScanChunks then C.PARALLEL_SCAN_CHUNKS = cfg.parallelScanChunks end
     if cfg.chestPriority      then C.CHEST_PRIORITY       = cfg.chestPriority      end
     if cfg.supplyChest        then C.SUPPLY_CHEST         = cfg.supplyChest        end
@@ -130,6 +148,7 @@ C.FUEL_LIST        = dofile(_path("data/fuel.lua"))
 local _compostData = dofile(_path("data/compostable.lua"))
 C.COMPOSTABLE      = _compostData.items
 C.COMPOST_TRASH    = _compostData.trash
+C.STOCK_LIMITS     = dofile(_path("data/stock_limits.lua"))
 C.LOW_STOCK_ALERTS = dofile(_path("data/alerts.lua"))
 
 -- Recipe book: merges built-in recipes + user-learned recipes
@@ -184,6 +203,10 @@ for _, f in ipairs(C.FUEL_LIST) do C.FUEL_SET[f.name] = true end
 C.COMPOSTABLE_SET = {}
 for _, name in ipairs(C.COMPOSTABLE) do C.COMPOSTABLE_SET[name] = true end
 
+-- Build stock limits set for quick lookup
+C.STOCK_LIMITS_SET = {}
+for name, _ in pairs(C.STOCK_LIMITS) do C.STOCK_LIMITS_SET[name] = true end
+
 return C
 
 end