{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://ap2-protocol.org/schemas/types/message_warning.json",
  "title": "MessageWarning",
  "description": "Warning message. Matches UCP types/message_warning.json (2026-04-08).",
  "type": "object",
  "required": ["type", "code", "content"],
  "properties": {
    "type": {
      "type": "string",
      "const": "warning",
      "description": "Message type discriminator."
    },
    "path": {
      "type": "string",
      "description": "JSONPath (RFC 9535) to related field."
    },
    "code": {
      "type": "string",
      "description": "Warning code."
    },
    "content": {
      "type": "string",
      "description": "Human-readable warning message."
    },
    "content_type": {
      "type": "string",
      "enum": ["plain", "markdown"],
      "default": "plain"
    },
    "presentation": {
      "type": "string",
      "default": "notice",
      "description": "Rendering contract: 'notice' or 'disclosure'."
    },
    "image_url": {
      "type": "string",
      "format": "uri",
      "description": "URL to a required visual element."
    },
    "url": {
      "type": "string",
      "format": "uri",
      "description": "Reference URL for more information."
    }
  }
}