Put recipe signals into their own item-group

changelog.txt

@@ -5,6 +5,7 @@ Date: ????
     - Updated Simplified Chinese locale courtesy of @alone on Discord
     - Add compatibility with AAI Signal Transmission. Now researched after
       logistics science and uses contemporary ingredients
+    - Recipe signals are now sorted into their own item-group in the crafting tab
 ---------------------------------------------------------------------------------------------------
 Version: 3.0.39
 Date: 2025-09-15

data-final-fixes.lua

@@ -124,6 +124,7 @@ if create_signal_mode then
                         end
                     end
                 end
+                recipe.subgroup = "py-recipes"
                 recipe.hide_from_signal_gui = false
             end
         end

data.lua

@@ -1,3 +1,4 @@
+require("prototypes.item-groups")
 require("prototypes.custom-input")
 -- Log all mods & versions, Alien Biomes already does this so we skip if it is active
 if not mods["alien-biomes"] then

locale/en/locale.cfg

@@ -32,3 +32,6 @@ recipe-amount=(__1__ ×) __2__
 
 [modifier-description]
 change-recipe-productivity=__1__ productivity: __2__
+
+[item-group-name]
+py-postprocessing=Py Postprocessing

prototypes/item-groups.lua

@@ -0,0 +1,20 @@
+local create_signal_mode = settings.startup["pypp-extended-recipe-signals"].value
+
+if create_signal_mode then
+    data:extend {
+        {
+            type = "item-group",
+            name = "py-postprocessing",
+            order = "v",
+            inventory_order = "v",
+            icon = "__pycoalprocessinggraphics__/graphics/icons/automated-factory-mk01.png",
+            icon_size = 64
+        },
+        {
+            type = "item-subgroup",
+            name = "py-recipes",
+            group = "py-postprocessing",
+            order = "a-a"
+        },
+    }
+end