Message

Message is one unit of communication between client and server. It is associated with a context and optionally a task. Since the server is responsible for the context definition, it must always provide a contextId in its messages. The client can optionally provide the contextId if it knows the context to associate the message to. Similarly for taskId, except the server decides if a task is created and whether to include the taskId.

JSON representation 
{
  "messageId": string,
  "contextId": string,
  "taskId": string,
  "role": enum (Role),
  "content": [
    {
      object (Part)
    }
  ],
  "metadata": {
    object
  },
  "extensions": [
    string
  ]
}
Fields
messageId

string

The unique identifier (e.g. UUID)of the message. This is required and created by the message creator.
contextId

string

The context id of the message. This is optional and if set, the message will be associated with the given context.
taskId

string

The task id of the message. This is optional and if set, the message will be associated with the given task.
role

enum (Role)

A role for the message.
content[]

object (Part)

protolint:disable REPEATED_FIELD_NAMES_PLURALIZED Content is the container of the message content.
metadata

object (Struct format)

protolint:enable REPEATED_FIELD_NAMES_PLURALIZED Any optional metadata to provide along with the message.
extensions[]

string

The URIs of extensions that are present or contributed to this Message.