{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://ap2-protocol.org/schemas/types/message.json",
  "title": "Message",
  "description": "Container for error, warning, or info messages. Matches UCP types/message.json (2026-04-08).",
  "oneOf": [
    { "$ref": "message_error.json" },
    { "$ref": "message_warning.json" },
    { "$ref": "message_info.json" }
  ]
}