Enum LlmStreamEvent 

pub enum LlmStreamEvent {
    TextDelta(String),
    ThinkingDelta(String),
    ThinkingSignature(String),
    ReasonItem {
        provider: String,
        model: Option<String>,
        item_id: String,
        encrypted_content: Option<String>,
        summary: Vec<String>,
        token_count: Option<u32>,
    },
    ToolCalls(Vec<ToolCall>),
    MessagePhase(ExecutionPhase),
    Done(Box<LlmCompletionMetadata>),
    Error(LlmStreamError),
}

Events emitted during LLM streaming

Variants

TextDelta(String)

Text delta (incremental content)

ThinkingDelta(String)

Thinking delta (incremental reasoning content from extended thinking models)

ThinkingSignature(String)

Cryptographic signature for thinking content (Anthropic Claude) Emitted when a thinking block completes, before the Done event

ReasonItem

Opaque assistant reasoning response item (OpenAI Responses). Carries provider-supplied opaque/encrypted reasoning artifacts plus safe summary text and per-item metadata. Plaintext hidden reasoning content is intentionally excluded so callers can persist this without exposing chain-of-thought.

Fields

provider: String

Provider name (e.g., “openai”).

model: Option<String>

Model identifier reported by the provider, if known.

item_id: String

Provider-assigned identifier for the reasoning item.

encrypted_content: Option<String>

Provider-encrypted reasoning context, if supplied.

summary: Vec<String>

Safe summary text segments curated by the provider.

token_count: Option<u32>

Per-item reasoning token count, when the provider reports one.

ToolCalls(Vec<ToolCall>)

Tool calls from the LLM

MessagePhase(ExecutionPhase)

Provider-native execution phase for the current assistant message, surfaced mid-stream before completion (EVE-774).

Only emitted by providers whose stream carries a native phase ahead of the terminal Done metadata (OpenAI Responses exposes it on response.output_item.added). Consumers use it as a best-effort hint to classify streamed assistant text as commentary vs final answer; the authoritative value is still the completed Message.phase. Other providers never emit this and stay unclassified until completion.

Done(Box<LlmCompletionMetadata>)

Streaming completed

Error(LlmStreamError)

Error during streaming

Trait Implementations

impl Clone for LlmStreamEvent

fn clone(&self) -> LlmStreamEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LlmStreamEvent

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

Formats the value using the given formatter.