fix

mods/stairs/init.lua

@@ -153,6 +153,8 @@ function stairs.register_stair_type(subname, recipeitem, groups, images,
 			return rotate_and_place(itemstack, placer, pointed_thing)
 		end,
 	})
+
+	-- for replace ABM
 	if replace and not outer_or_inner then
 		minetest.register_node(":" .. stairdata[1] .. subname .. "upside_down", {
 			replace_name = stairdata[1] .. subname,
@@ -161,12 +163,14 @@ function stairs.register_stair_type(subname, recipeitem, groups, images,
 	end
 
 	if recipeitem then
+		-- Recipe matches appearence in inventory
 		minetest.register_craft({
 			output = stairdata[1] .. subname .. stairdata[2],
 			recipe = stairdata[5],
 		})
+
+		-- Use stairs to craft full blocks again (1:1)
 		if not outer_or_inner then
-			-- Use stairs to craft full blocks again (1:1)
 			minetest.register_craft({
 				output = recipeitem .. " 3",
 				recipe = {
@@ -175,13 +179,13 @@ function stairs.register_stair_type(subname, recipeitem, groups, images,
 				},
 			})
 		end
+
 		-- Fuel
 		local baseburntime = minetest.get_craft_result({
 			method = "fuel",
 			width = 1,
 			items = {recipeitem}
 		}).time
-
 		if baseburntime > 0 then
 			minetest.register_craft({
 				type = "fuel",