Struct Message 

pub struct Message {
    pub id: String,
    pub version: u8,
    pub from: String,
    pub to: MessageTarget,
    pub content: MessageContent,
    pub correlation_id: Option<String>,
    pub topic: Option<String>,
    pub metadata: HashMap<String, String>,
    pub created_at: i64,
}

A message for inter-agent communication (v1).

The new message format with typed content, flexible routing, and metadata.

Example

use enki_core::{Message, MessageContent, MessageTarget};

// Create a text message
let msg = Message::text("my-agent", "Hello, world!")
    .to(MessageTarget::agent("other-agent"));

// Create a tool call
let tool_msg = Message::builder("my-agent")
    .content(MessageContent::ToolCall {
        name: "search".to_string(),
        arguments: serde_json::json!({"query": "rust"}),
    })
    .to(MessageTarget::agent("tool-handler"))
    .build();

Fields

id: String

Unique message identifier (auto-generated UUID).

version: u8

Protocol version (currently 1).

from: String

Sender agent name.

to: MessageTarget

Intended recipient(s).

content: MessageContent

Message content type and payload.

correlation_id: Option<String>

Optional correlation ID for request/response tracking.

topic: Option<String>

Optional topic for pub/sub routing.

metadata: HashMap<String, String>

Arbitrary metadata key-value pairs.

created_at: i64

Creation timestamp in microseconds since epoch.

Implementations

impl Message

pub fn builder(from: impl Into<String>) -> MessageBuilder

Create a message builder.

Example

use enki_core::{Message, MessageContent, MessageTarget};

let msg = Message::builder("agent1")
    .content(MessageContent::Text("Hello".to_string()))
    .to(MessageTarget::agent("agent2"))
    .build();

pub fn text( from: impl Into<String>, content: impl Into<String>, ) -> MessageBuilder

Create a text message.

pub fn json(from: impl Into<String>, data: Value) -> MessageBuilder

Create a JSON message.

pub fn binary(from: impl Into<String>, data: Vec<u8>) -> MessageBuilder

Create a binary message.

pub fn tool_call( from: impl Into<String>, name: impl Into<String>, arguments: Value, ) -> MessageBuilder

Create a tool call message.

pub fn tool_result( from: impl Into<String>, output: impl Into<String>, error: Option<String>, ) -> MessageBuilder

Create a tool result message.

pub fn agent_request( from: impl Into<String>, method: impl Into<String>, params: Value, ) -> MessageBuilder

Create an agent request message.

pub fn agent_response(from: impl Into<String>, result: Value) -> MessageBuilder

Create an agent response message.

pub fn empty(from: impl Into<String>) -> MessageBuilder

Create an empty message (heartbeat/ack).

Trait Implementations

impl Clone for Message

fn clone(&self) -> Message

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Message

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Message

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<LegacyMessage> for Message

fn from(legacy: LegacyMessage) -> Self

Convert from legacy message format.

impl Serialize for Message

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<Message> for LegacyMessage

fn try_from(msg: Message) -> Result<Self, Self::Error>

Convert to legacy message format (lossy conversion).

type Error = Error

The type returned in the event of a conversion error.