Add model availability NUX metadata

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json

@@ -10225,6 +10225,16 @@
       },
       "Model": {
         "properties": {
+          "availabilityNux": {
+            "anyOf": [
+              {
+                "$ref": "#/definitions/v2/ModelAvailabilityNux"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
           "defaultReasoningEffort": {
             "$ref": "#/definitions/v2/ReasoningEffort"
           },
@@ -10285,6 +10295,21 @@
         ],
         "type": "object"
       },
+      "ModelAvailabilityNux": {
+        "properties": {
+          "id": {
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "id",
+          "message"
+        ],
+        "type": "object"
+      },
       "ModelListParams": {
         "$schema": "http://json-schema.org/draft-07/schema#",
         "properties": {

codex-rs/app-server-protocol/schema/json/v2/ModelListResponse.json

@@ -22,6 +22,16 @@
     },
     "Model": {
       "properties": {
+        "availabilityNux": {
+          "anyOf": [
+            {
+              "$ref": "#/definitions/ModelAvailabilityNux"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
         "defaultReasoningEffort": {
           "$ref": "#/definitions/ReasoningEffort"
         },
@@ -82,6 +92,21 @@
       ],
       "type": "object"
     },
+    "ModelAvailabilityNux": {
+      "properties": {
+        "id": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "id",
+        "message"
+      ],
+      "type": "object"
+    },
     "ReasoningEffort": {
       "description": "See https://platform.openai.com/docs/guides/reasoning?api-mode=responses#get-started-with-reasoning",
       "enum": [