Add crafting turtle script to listen for craft commands via modem

craftingTurtle.lua

@@ -0,0 +1,45 @@
+-- Crafting Turtle Script
+-- Run this on the crafting turtle (turtle with crafting table).
+-- Listens for craft commands from the master computer via wired modem.
+
+local CRAFT_CHANNEL       = 4203
+local CRAFT_REPLY_CHANNEL = 4204
+
+-- Find modem (wired or wireless)
+local modem = peripheral.find("modem")
+if not modem then
+    print("[ERR] No modem found! Attach a wired modem.")
+    return
+end
+
+modem.open(CRAFT_CHANNEL)
+
+print("=================================")
+print("  Crafting Turtle (Listener)")
+print("=================================")
+print("")
+print("Listening on channel " .. CRAFT_CHANNEL)
+print("Ready for craft commands from master.")
+print("")
+
+while true do
+    local event, side, channel, replyChannel, message = os.pullEvent("modem_message")
+    if channel == CRAFT_CHANNEL and type(message) == "table" and message.type == "craft" then
+        local count = message.count or 1
+        print(string.format("[CRAFT] Received craft request (count=%d)", count))
+
+        local ok, err = turtle.craft(count)
+
+        if ok then
+            print("[CRAFT] Success!")
+        else
+            print("[CRAFT] Failed: " .. tostring(err))
+        end
+
+        modem.transmit(replyChannel, CRAFT_CHANNEL, {
+            type    = "craft_result",
+            success = ok,
+            error   = not ok and tostring(err) or nil,
+        })
+    end
+end