@asyncapi/specs/definitions/3.1.0/specificationExtension.json

AsyncAPI schema versions

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "http://asyncapi.com/definitions/3.1.0/specificationExtension.json",
  "description": "Any property starting with x- is valid.",
  "additionalItems": true,
  "additionalProperties": true
}