Enum StreamEvent 

pub enum StreamEvent {
    ReasoningDelta(String),
    ContentDelta(String),
    ToolCallStart {
        index: usize,
        id: String,
        name: String,
    },
    ToolCallDelta {
        index: usize,
        arguments: String,
    },
    Usage(TokenUsage),
    AudioDelta {
        data: Vec<u8>,
        format: String,
    },
    FileAttachment {
        filename: String,
        media_type: String,
        data: Vec<u8>,
    },
    Finished(FinishReason),
}

Events emitted incrementally by the provider’s stream.

Each variant corresponds to a server-side SSE/data-line event type. Consumers assemble these into higher-level AgentEvents.

Variants

ReasoningDelta(String)

Incremental reasoning/chain-of-thought token.

ContentDelta(String)

Incremental assistant text token.

ToolCallStart

The LLM started requesting a tool call at index.

Fields

index: usize

id: String

name: String

ToolCallDelta

Incremental JSON argument string for the tool at index.

Fields

index: usize

arguments: String

Usage(TokenUsage)

Token usage snapshot mid-stream (some providers emit this).

AudioDelta

Incremental audio output chunk (raw PCM/MP3 bytes).

Fields

data: Vec<u8>

format: String

FileAttachment

Out-of-band file delivered by the provider (e.g. generated image).

Fields

filename: String

media_type: String

data: Vec<u8>

Finished(FinishReason)

Stream has ended; payload is the final finish reason.

Trait Implementations

impl Clone for StreamEvent

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 StreamEvent

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

Formats the value using the given formatter.