diff --git a/examples/events/instances/gts.x.core.events.topic.v1~x.core._.default.v1.json b/examples/events/instances/gts.x.core.events.topic.v1~x.core._.default.v1.json
new file mode 100644
index 0000000..2c4dae6
--- /dev/null
+++ b/examples/events/instances/gts.x.core.events.topic.v1~x.core._.default.v1.json
@@ -0,0 +1,10 @@
+{
+  "id": "gts.x.core.events.topic.v1~x.core._.default.v1",
+  "name": "default",
+  "description": "Default platform event topic. Used when an event type does not declare a specific topicRef trait.",
+  "retention": "P30D",
+  "ordering": "global",
+  "partitions": 1,
+  "dedup": { "strategy": "none" },
+  "storage": { "kind": "db", "config": { "table": "events_default" } }
+}
\ No newline at end of file
diff --git a/examples/events/types/gts.x.core.events.type.v1~x.commerce.orders.order_placed.v1.0~.schema.json b/examples/events/types/gts.x.core.events.type.v1~x.commerce.orders.order_placed.v1.0~.schema.json
index 955b749..c70fedd 100644
--- a/examples/events/types/gts.x.core.events.type.v1~x.commerce.orders.order_placed.v1.0~.schema.json
+++ b/examples/events/types/gts.x.core.events.type.v1~x.commerce.orders.order_placed.v1.0~.schema.json
@@ -31,7 +31,7 @@
     }
   ],
   "x-gts-traits": {
-    "topicRef": "gts.x.core.events.topic.v1~x.commerce._.orders.v1",
+    "topicRef": "gts.x.core.events.topic.v1~x.commerce._.orders.v1.0",
     "retention": "P90D"
   }
 }
diff --git a/examples/events/types/gts.x.core.events.type.v1~x.commerce.orders.order_placed.v1.1~.schema.json b/examples/events/types/gts.x.core.events.type.v1~x.commerce.orders.order_placed.v1.1~.schema.json
index 905add1..9d9da3d 100644
--- a/examples/events/types/gts.x.core.events.type.v1~x.commerce.orders.order_placed.v1.1~.schema.json
+++ b/examples/events/types/gts.x.core.events.type.v1~x.commerce.orders.order_placed.v1.1~.schema.json
@@ -32,7 +32,7 @@
     }
   ],
   "x-gts-traits": {
-    "topicRef": "gts.x.core.events.topic.v1~x.commerce._.orders.v1",
+    "topicRef": "gts.x.core.events.topic.v1~x.commerce._.orders.v1.0",
     "retention": "P90D"
   }
 }
diff --git a/examples/mcp/types/gts.x.ai.mcp.tool.v1~x.ai.mcp.http_outbound.v1~.schema.jsonc b/examples/mcp/types/gts.x.ai.mcp.tool.v1~x.ai.mcp.http_outbound.v1~.schema.jsonc
index 8717b02..730e39f 100644
--- a/examples/mcp/types/gts.x.ai.mcp.tool.v1~x.ai.mcp.http_outbound.v1~.schema.jsonc
+++ b/examples/mcp/types/gts.x.ai.mcp.tool.v1~x.ai.mcp.http_outbound.v1~.schema.jsonc
@@ -46,8 +46,7 @@
           "additionalProperties": false
         }
       },
-      "required": ["security", "capabilities"],
-      "additionalProperties": false
+      "required": ["security", "capabilities"]
     }
   ]
 }
diff --git a/examples/settings/instances/gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~.examples.jsonc b/examples/settings/instances/gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~.examples.jsonc
index 35b08fd..55fead7 100644
--- a/examples/settings/instances/gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~.examples.jsonc
+++ b/examples/settings/instances/gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~.examples.jsonc
@@ -1,38 +1,33 @@
 [
-  // Platform-scope default: new dashboard is disabled platform-wide.
+  // Per-user default at platform scope: new dashboard disabled for this user.
   {
     "type": "gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~",
     "tenant_id": "00000000-0000-0000-0000-000000000000",
+    "subject_type": "gts.x.core.idp.user.v1~",
+    "subject_id": "f0e1d2c3-b4a5-6789-0123-456789abcdef",
     "value": {
       "enabled": false
     }
   },
-  // Platform-scope override: platform administrator has enabled the new dashboard globally.
+  // Per-user override at platform scope: platform admin has opted in.
   {
     "type": "gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~",
     "tenant_id": "00000000-0000-0000-0000-000000000000",
+    "subject_type": "gts.x.core.idp.user.v1~",
+    "subject_id": "a1b2c3d4-e5f6-7890-abcd-000000000001",
     "value": {
       "enabled": true
     }
   },
-  // Tenant-scope override: tenant 'acme-corp' has opted out while the platform default is true.
-  // Cascading — this tenant and its non-overriding descendants see enabled=false.
-  {
-    "type": "gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~",
-    "tenant_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
-    "value": {
-      "enabled": false
-    }
-  },
-  // Subject-scoped override: setting attached to a specific user within tenant 'acme-corp'.
-  // subject_type is a GTS type reference; subject_id identifies the user.
+  // Per-user override at tenant scope: user within tenant 'acme-corp' has opted out
+  // while the cascading default is true.
   {
     "type": "gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~",
     "tenant_id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
     "subject_type": "gts.x.core.idp.user.v1~",
     "subject_id": "f0e1d2c3-b4a5-6789-0123-456789abcdef",
     "value": {
-      "enabled": true
+      "enabled": false
     }
   }
 ]
diff --git a/examples/settings/types/gts.x.core.settings.type.v1~.schema.json b/examples/settings/types/gts.x.core.settings.type.v1~.schema.json
index b56e777..172902c 100644
--- a/examples/settings/types/gts.x.core.settings.type.v1~.schema.json
+++ b/examples/settings/types/gts.x.core.settings.type.v1~.schema.json
@@ -75,4 +75,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/examples/settings/types/gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~.schema.json b/examples/settings/types/gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~.schema.json
index e29334f..e7c3a59 100644
--- a/examples/settings/types/gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~.schema.json
+++ b/examples/settings/types/gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~.schema.json
@@ -8,11 +8,15 @@
     { "$ref": "gts://gts.x.core.settings.type.v1~" },
     {
       "type": "object",
-      "required": ["type", "value"],
+      "required": ["type", "subject_type", "subject_id", "value"],
       "properties": {
         "type": {
           "const": "gts.x.core.settings.type.v1~x.platform._.feature_new_dashboard.v1~"
         },
+        "subject_type": {
+          "type": "string",
+          "x-gts-ref": "gts.x.core.idp.user.v1~"
+        },
         "value": {
           "type": "object",
           "required": ["enabled"],
diff --git a/examples/typespec/vms/types/states/gts.x.infra.compute.vm_state.v1~.schema.json b/examples/typespec/vms/types/states/gts.x.infra.compute.vm_state.v1~.schema.json
index 8ea914b..77c91df 100644
--- a/examples/typespec/vms/types/states/gts.x.infra.compute.vm_state.v1~.schema.json
+++ b/examples/typespec/vms/types/states/gts.x.infra.compute.vm_state.v1~.schema.json
@@ -6,11 +6,11 @@
     "description": "Base type for all VM power states. Final: no derived types allowed.",
     "type": "object",
     "required": [
-        "gtsId",
+        "id",
         "description"
     ],
     "properties": {
-        "gtsId": {
+        "id": {
             "type": "string",
             "description": "GTS identifier of the power state type",
             "x-gts-ref": "/$id"
@@ -28,4 +28,4 @@
             "description": "Icon name for UI representation (optional)"
         }
     }
-}
\ No newline at end of file
+}
diff --git a/examples/users/types/gts.x.core.idp.user.v2~.schema.json b/examples/users/types/gts.x.core.idp.user.v2~.schema.json
new file mode 100644
index 0000000..a23d384
--- /dev/null
+++ b/examples/users/types/gts.x.core.idp.user.v2~.schema.json
@@ -0,0 +1,57 @@
+{
+  "$id": "gts://gts.x.core.idp.user.v2~",
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "x-gts-abstract": true,
+  "title": "User (Base)",
+  "description": "Abstract base type for platform user identities. Derived types add vendor- or role-specific fields via the open 'properties' container.",
+  "type": "object",
+  "required": ["id", "type", "tenant_id", "email", "display_name", "status"],
+  "properties": {
+    "id": {
+      "description": "Unique user identifier.",
+      "type": "string",
+      "format": "uuid"
+    },
+    "type": {
+      "description": "GTS Type Identifier of this user.",
+      "type": "string",
+      "x-gts-ref": "/$id"
+    },
+    "tenant_id": {
+      "description": "UUID of the tenant this user belongs to.",
+      "type": "string",
+      "format": "uuid"
+    },
+    "email": {
+      "description": "Primary email address.",
+      "type": "string",
+      "format": "email"
+    },
+    "display_name": {
+      "description": "Human-readable display name.",
+      "type": "string",
+      "minLength": 1,
+      "maxLength": 200
+    },
+    "status": {
+      "description": "Account lifecycle status. Backward incompatible change from v1.",
+      "type": "string",
+      "enum": ["active", "inactive", "suspended", "deleted"]
+    },
+    "created_at": {
+      "description": "Timestamp when the user was created.",
+      "type": "string",
+      "format": "date-time"
+    },
+    "updated_at": {
+      "description": "Timestamp of the last update.",
+      "type": "string",
+      "format": "date-time"
+    },
+    "properties": {
+      "description": "Extension point for derived types. Vendor- or role-specific fields go here.",
+      "type": "object"
+    }
+  },
+  "additionalProperties": false
+}
diff --git a/examples/yaml/ui/types/gts.x.ui.core.item.v1~.schema.yaml b/examples/yaml/ui/types/gts.x.ui.core.item.v1~.schema.yaml
index 731b788..b67255f 100644
--- a/examples/yaml/ui/types/gts.x.ui.core.item.v1~.schema.yaml
+++ b/examples/yaml/ui/types/gts.x.ui.core.item.v1~.schema.yaml
@@ -9,13 +9,13 @@ description: |
 type: object
 
 required:
-  - gtsId
+  - gtsType
   - id
   - type
   - label
 
 properties:
-  gtsId:
+  gtsType:
     type: string
     description: GTS identifier of the UI item type
     x-gts-ref: /$id
diff --git a/examples/yaml/ui/types/gts.x.ui.core.item.v1~x.ui.components.grid.v1~.schema.yaml b/examples/yaml/ui/types/gts.x.ui.core.item.v1~x.ui.components.grid.v1~.schema.yaml
index 6f11dc2..f83b78b 100644
--- a/examples/yaml/ui/types/gts.x.ui.core.item.v1~x.ui.components.grid.v1~.schema.yaml
+++ b/examples/yaml/ui/types/gts.x.ui.core.item.v1~x.ui.components.grid.v1~.schema.yaml
@@ -15,7 +15,7 @@ allOf:
       - type
       - metadata
     properties:
-      gtsId:
+      gtsType:
         type: string
         const: gts.x.ui.core.item.v1~x.ui.components.grid.v1~
         description: GTS identifier of the UI item type
diff --git a/examples/yaml/ui/types/gts.x.ui.core.item.v1~x.ui.components.menu_item.v1~.schema.yaml b/examples/yaml/ui/types/gts.x.ui.core.item.v1~x.ui.components.menu_item.v1~.schema.yaml
index 376ed20..7be9649 100644
--- a/examples/yaml/ui/types/gts.x.ui.core.item.v1~x.ui.components.menu_item.v1~.schema.yaml
+++ b/examples/yaml/ui/types/gts.x.ui.core.item.v1~x.ui.components.menu_item.v1~.schema.yaml
@@ -15,7 +15,7 @@ allOf:
       - type
       - metadata
     properties:
-      gtsId:
+      gtsType:
         type: string
         const: gts.x.ui.core.item.v1~x.ui.components.menu_item.v1~
         description: GTS identifier of the UI item type