From 16559e75955e783363d50304809b74b701356f6f Mon Sep 17 00:00:00 2001
From: Ian Robinson <drtchops@users.noreply.github.com>
Date: Wed, 24 Dec 2025 08:48:05 -0500
Subject: [PATCH] Core: allow abstract world classes (#5468)

---
 worlds/AutoWorld.py | 42 +++++++++++++++++++++++-------------------
 1 file changed, 23 insertions(+), 19 deletions(-)

diff --git a/worlds/AutoWorld.py b/worlds/AutoWorld.py
index 8bd6ffaf3c..e1435b3a68 100644
--- a/worlds/AutoWorld.py
+++ b/worlds/AutoWorld.py
@@ -47,27 +47,31 @@ class AutoWorldRegister(type):
     def __new__(mcs, name: str, bases: Tuple[type, ...], dct: Dict[str, Any]) -> AutoWorldRegister:
         if "web" in dct:
             assert isinstance(dct["web"], WebWorld), "WebWorld has to be instantiated."
-        # filter out any events
-        dct["item_name_to_id"] = {name: id for name, id in dct["item_name_to_id"].items() if id}
-        dct["location_name_to_id"] = {name: id for name, id in dct["location_name_to_id"].items() if id}
-        # build reverse lookups
-        dct["item_id_to_name"] = {code: name for name, code in dct["item_name_to_id"].items()}
-        dct["location_id_to_name"] = {code: name for name, code in dct["location_name_to_id"].items()}
 
-        # build rest
-        dct["item_names"] = frozenset(dct["item_name_to_id"])
-        dct["item_name_groups"] = {group_name: frozenset(group_set) for group_name, group_set
-                                   in dct.get("item_name_groups", {}).items()}
-        dct["item_name_groups"]["Everything"] = dct["item_names"]
-
-        dct["location_names"] = frozenset(dct["location_name_to_id"])
-        dct["location_name_groups"] = {group_name: frozenset(group_set) for group_name, group_set
-                                       in dct.get("location_name_groups", {}).items()}
-        dct["location_name_groups"]["Everywhere"] = dct["location_names"]
-        dct["all_item_and_group_names"] = frozenset(dct["item_names"] | set(dct.get("item_name_groups", {})))
-
-        # move away from get_required_client_version function
         if "game" in dct:
+            assert "item_name_to_id" in dct, f"{name}: item_name_to_id is required"
+            assert "location_name_to_id" in dct, f"{name}: location_name_to_id is required"
+
+            # filter out any events
+            dct["item_name_to_id"] = {name: id for name, id in dct["item_name_to_id"].items() if id}
+            dct["location_name_to_id"] = {name: id for name, id in dct["location_name_to_id"].items() if id}
+            # build reverse lookups
+            dct["item_id_to_name"] = {code: name for name, code in dct["item_name_to_id"].items()}
+            dct["location_id_to_name"] = {code: name for name, code in dct["location_name_to_id"].items()}
+
+            # build rest
+            dct["item_names"] = frozenset(dct["item_name_to_id"])
+            dct["item_name_groups"] = {group_name: frozenset(group_set) for group_name, group_set
+                                    in dct.get("item_name_groups", {}).items()}
+            dct["item_name_groups"]["Everything"] = dct["item_names"]
+
+            dct["location_names"] = frozenset(dct["location_name_to_id"])
+            dct["location_name_groups"] = {group_name: frozenset(group_set) for group_name, group_set
+                                        in dct.get("location_name_groups", {}).items()}
+            dct["location_name_groups"]["Everywhere"] = dct["location_names"]
+            dct["all_item_and_group_names"] = frozenset(dct["item_names"] | set(dct.get("item_name_groups", {})))
+
+            # move away from get_required_client_version function
             assert "get_required_client_version" not in dct, f"{name}: required_client_version is an attribute now"
         # set minimum required_client_version from bases
         if "required_client_version" in dct and bases: