Struct ChatDeltaAction 

pub struct ChatDeltaAction {
    pub turn_id: String,
    pub part_id: String,
    pub content: String,
    pub meta: Option<JsonObject>,
}

Streaming text chunk from the assistant, appended to a specific response part.

The server MUST first emit a chat/responsePart to create the target part (markdown or reasoning), then use this action to append text to it.

Fields

turn_id: String

Turn identifier

part_id: String

Identifier of the response part to append to

content: String

Text chunk

meta: Option<JsonObject>

Additional provider-specific metadata for this action.

Clients MAY look for well-known keys here to provide enhanced UI, and agent hosts MAY use it to carry per-event context that does not fit any other field — for example, attributing the event to a specific agent (such as a sub-agent acting within the turn). Mirrors the MCP _meta convention.

Trait Implementations

impl Clone for ChatDeltaAction

fn clone(&self) -> ChatDeltaAction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChatDeltaAction

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ChatDeltaAction

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ChatDeltaAction

fn eq(&self, other: &ChatDeltaAction) -> 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 Serialize for ChatDeltaAction

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ChatDeltaAction