"The Responses Object MUST contain at least one response code"

https://spec.openapis.org/oas/v3.1.0#responses-object

Author: karenetheridge

schemas/v3.1/schema.json

@@ -813,6 +813,7 @@
           "$ref": "#/$defs/response-or-reference"
         }
       },
+      "minProperties": 1,
       "$ref": "#/$defs/specification-extensions",
       "unevaluatedProperties": false
     },

schemas/v3.1/schema.yaml

@@ -551,6 +551,7 @@ $defs:
     patternProperties:
       '^[1-5](?:[0-9]{2}|XX)$':
         $ref: '#/$defs/response-or-reference'
+    minProperties: 1
     $ref: '#/$defs/specification-extensions'
     unevaluatedProperties: false