Enum SessionUpdate 

pub enum SessionUpdate {
    UserMessageChunk(ContentChunk),
    AgentMessageChunk(ContentChunk),
    AgentThoughtChunk(ContentChunk),
    ToolCall(ToolCall),
    ToolCallUpdate(ToolCallUpdate),
    Plan(Plan),
    AvailableCommandsUpdate(AvailableCommandsUpdate),
    CurrentModeUpdate(CurrentModeUpdate),
    ConfigOptionUpdate(ConfigOptionUpdate),
    SessionInfoUpdate(SessionInfoUpdate),
    UsageUpdate(UsageUpdate),
    Notice(Notice),
    Other(Value),
}

Different types of updates the agent can send during session processing. A 13-arm discriminated union keyed on the wire sessionUpdate field.

PartialEq only — the UsageUpdate variant carries an f64 (the cost amount), and f64 does not implement Eq because of NaN. The usage_update payload is the only variant that pays the price, but dropping Eq from the whole enum is the simpler choice.

Variants

UserMessageChunk(ContentChunk)

A chunk of the user’s message being streamed.

AgentMessageChunk(ContentChunk)

A chunk of the agent’s response being streamed.

AgentThoughtChunk(ContentChunk)

A chunk of the agent’s internal reasoning being streamed.

ToolCall(ToolCall)

Notification that a new tool call has been initiated.

ToolCallUpdate(ToolCallUpdate)

Update on the status or results of a tool call.

Plan(Plan)

The agent’s execution plan.

AvailableCommandsUpdate(AvailableCommandsUpdate)

Available commands are ready or have changed.

CurrentModeUpdate(CurrentModeUpdate)

The current mode of the session has changed.

ConfigOptionUpdate(ConfigOptionUpdate)

Session configuration options have been updated.

SessionInfoUpdate(SessionInfoUpdate)

Session metadata has been updated (title, timestamps).

UsageUpdate(UsageUpdate)

Context window and cost update.

Notice(Notice)

Information for the user that is not part of session history.

Other(Value)

A session update the typed form does not yet model. The wire payload is preserved verbatim for the bridge to forward.

Trait Implementations

impl Clone for SessionUpdate

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SessionUpdate

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SessionUpdate

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for SessionUpdate

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for SessionUpdate

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 SessionUpdate