{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/UserMessageListResult",
  "title": "UserMessageListResult",
  "properties": {
    "message_type": {
      "type": "string",
      "const": "user_message",
      "title": "Message Type",
      "default": "user_message"
    },
    "content": {
      "anyOf": [
        {
          "items": {
            "$ref": "#/components/schemas/LettaUserMessageContentUnion"
          },
          "type": "array"
        },
        {
          "type": "string"
        }
      ],
      "title": "Content",
      "description": "The message content sent by the user (can be a string or an array of multi-modal content parts)"
    },
    "message_id": {
      "type": "string",
      "title": "Message Id",
      "description": "The unique identifier of the message."
    },
    "agent_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Agent Id",
      "description": "The unique identifier of the agent that owns the message."
    },
    "conversation_id": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ],
      "title": "Conversation Id",
      "description": "The unique identifier of the conversation that the message belongs to."
    },
    "created_at": {
      "type": "string",
      "format": "date-time",
      "title": "Created At",
      "description": "The time the message was created in ISO format."
    }
  },
  "type": "object",
  "required": [
    "content",
    "message_id",
    "created_at"
  ],
  "description": "User message list result with agent context.\n\nShape is identical to UpdateUserMessage but includes the owning agent_id and message id."
}