{
  "$defs": {
    "Role": {
      "description": "Chat message roles, normalised across providers.",
      "enum": [
        "system",
        "user",
        "assistant",
        "tool"
      ],
      "title": "Role",
      "type": "string"
    }
  },
  "description": "A single stored conversation turn.\n\nAttributes:\n    role: Who spoke (user/assistant/system/tool).\n    content: The turn text.",
  "properties": {
    "role": {
      "$ref": "#/$defs/Role"
    },
    "content": {
      "title": "Content",
      "type": "string"
    }
  },
  "required": [
    "role",
    "content"
  ],
  "title": "MemoryTurn",
  "type": "object"
}