Struct HistoryMessage 

pub struct HistoryMessage {
    pub role: String,
    pub content: String,
    pub data: Option<Value>,
}

One entry of conversation history, oldest first in a slice.

Deliberately minimal: this crate does not depend on any particular chat message type, so callers map their own history onto this.

Fields

role: String

Who produced the message. Only used for reporting.

content: String

The textual content, which may embed an envelope or <a2ui-json> blocks.

data: Option<Value>

Structured payload, when the transport carried one (a tool result, an A2A data part). Checked before content.

Implementations

impl HistoryMessage

pub fn text(role: impl Into<String>, content: impl Into<String>) -> Self

A message with textual content only.

pub fn data(role: impl Into<String>, data: Value) -> Self

A message carrying a structured payload.

Trait Implementations

impl Clone for HistoryMessage

fn clone(&self) -> HistoryMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HistoryMessage

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

Formats the value using the given formatter.

impl Default for HistoryMessage

fn default() -> HistoryMessage

Returns the “default value” for a type.

impl From<&Message> for HistoryMessage

Maps an AG-UI message onto the toolkit’s transport-neutral history entry.

Text goes to content and structured payloads to data, which is the split crate::toolkit::history scans on. A user’s multimodal parts are flattened to their text: an A2UI envelope is never an image.

fn from(message: &Message) -> Self

Converts to this type from the input type.

impl PartialEq for HistoryMessage

fn eq(&self, other: &HistoryMessage) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for HistoryMessage