diff --git a/app/modules/cart/definition.py b/app/modules/cart/definition.py
index 1bec395e..7bb2a966 100644
--- a/app/modules/cart/definition.py
+++ b/app/modules/cart/definition.py
@@ -6,7 +6,7 @@ This module provides shopping cart functionality for customer storefronts.
 It is session-based and does not require customer authentication.
 """
 
-from app.modules.core.module_registry import ModuleDefinition
+from app.modules.base import ModuleDefinition
 
 module = ModuleDefinition(
     code="cart",
@@ -14,12 +14,5 @@ module = ModuleDefinition(
     description="Session-based shopping cart for storefronts",
     version="1.0.0",
     is_self_contained=True,
-    dependencies=["inventory"],  # Checks inventory availability
-    provides_models=True,
-    provides_schemas=True,
-    provides_services=True,
-    provides_api_routes=True,
-    provides_page_routes=False,
-    provides_admin_ui=False,
-    provides_vendor_ui=False,
+    requires=["inventory"],  # Checks inventory availability
 )
diff --git a/app/modules/catalog/definition.py b/app/modules/catalog/definition.py
index f54ff18d..d6e7c8f3 100644
--- a/app/modules/catalog/definition.py
+++ b/app/modules/catalog/definition.py
@@ -9,9 +9,5 @@ module = ModuleDefinition(
     description="Product catalog browsing and search for storefronts",
     version="1.0.0",
     is_self_contained=True,
-    dependencies=["inventory"],
-    provides_models=False,  # Uses Product model from products module
-    provides_schemas=True,
-    provides_services=True,
-    provides_api_routes=True,
+    requires=["inventory"],
 )
diff --git a/app/modules/checkout/definition.py b/app/modules/checkout/definition.py
index c44d78cb..127c16b9 100644
--- a/app/modules/checkout/definition.py
+++ b/app/modules/checkout/definition.py
@@ -9,9 +9,5 @@ module = ModuleDefinition(
     description="Checkout and order creation for storefronts",
     version="1.0.0",
     is_self_contained=True,
-    dependencies=["cart", "orders", "payments", "customers"],
-    provides_models=False,  # Uses Order model from orders module
-    provides_schemas=True,
-    provides_services=True,
-    provides_api_routes=True,
+    requires=["cart", "orders", "payments", "customers"],
 )