{
  "_comment": "v0.3 canonical: params.message.parts is a list of Part objects. This is what the platform's normalizer produces internally and what the a-2-a-sdk v0.3 Pydantic validator expects.",
  "_added": "2026-04-30",
  "_source": "a-2-a-sdk v0.3 release notes example",
  "jsonrpc": "2.0",
  "method": "message/send",
  "id": "msg-test-v03-parts",
  "params": {
    "message": {
      "messageId": "msg-3",
      "role": "user",
      "parts": [
        {"kind": "text", "text": "hello world"}
      ]
    }
  }
}
