Enum StreamEvent 

pub enum StreamEvent {
    Start {
        partial: AssistantMessage,
    },
    TextStart {
        content_index: usize,
        partial: AssistantMessage,
    },
    TextDelta {
        content_index: usize,
        delta: String,
        partial: AssistantMessage,
    },
    TextEnd {
        content_index: usize,
        content: String,
        partial: AssistantMessage,
    },
    ThinkingStart {
        content_index: usize,
        partial: AssistantMessage,
    },
    ThinkingDelta {
        content_index: usize,
        delta: String,
        partial: AssistantMessage,
    },
    ThinkingEnd {
        content_index: usize,
        content: String,
        partial: AssistantMessage,
    },
    ToolcallStart {
        content_index: usize,
        partial: AssistantMessage,
    },
    ToolcallDelta {
        content_index: usize,
        delta: String,
        partial: AssistantMessage,
    },
    ToolcallEnd {
        content_index: usize,
        tool_call: ToolCall,
        partial: AssistantMessage,
    },
    ToolOutputDelta {
        tool_call_id: String,
        delta: String,
    },
    ToolResult {
        tool_call_id: String,
        tool_name: String,
        is_error: bool,
        content: String,
        summary: Option<String>,
    },
    Done {
        reason: StopReason,
        message: AssistantMessage,
    },
    Error {
        reason: StopReason,
        error: AssistantMessage,
    },
    SteerMessage {
        message: UserMessage,
    },
    Phase {
        phase: AgentPhase,
        turn_started_at_ms: Option<u64>,
        phase_started_at_ms: Option<u64>,
    },
    Status {
        message: String,
    },
}

Variants

Start

Fields

partial: AssistantMessage

TextStart

Fields

content_index: usize

partial: AssistantMessage

TextDelta

Fields

content_index: usize

delta: String

partial: AssistantMessage

TextEnd

Fields

content_index: usize

content: String

partial: AssistantMessage

ThinkingStart

Fields

content_index: usize

partial: AssistantMessage

ThinkingDelta

Fields

content_index: usize

delta: String

partial: AssistantMessage

ThinkingEnd

Fields

content_index: usize

content: String

partial: AssistantMessage

ToolcallStart

Fields

content_index: usize

partial: AssistantMessage

ToolcallDelta

Fields

content_index: usize

delta: String

partial: AssistantMessage

ToolcallEnd

Fields

content_index: usize

tool_call: ToolCall

partial: AssistantMessage

ToolOutputDelta

Incremental tool output line (streaming, e.g. bash).

Fields

tool_call_id: String

delta: String

ToolResult

Tool execution completed.

Fields

tool_call_id: String

tool_name: String

is_error: bool

content: String

Full text output.

summary: Option<String>

Done

Fields

reason: StopReason

message: AssistantMessage

Error

Fields

reason: StopReason

error: AssistantMessage

SteerMessage

A steering message was injected mid-loop.

Fields

message: UserMessage

Phase

Agent phase transition. Only sent for phases that have no implicit stream event (Waiting, Preparing, Connecting, Compacting). Other phases are derived by the TUI from existing events:

• ThinkingStart/ThinkingDelta → Thinking
• TextStart/TextDelta → Responding
• ToolcallStart → Responding (still LLM output)
• ToolResult → ToolExec
• Start → transition from Connecting (but phase already set)
• AgentDone/Cancelled/Error → Idle

turn_started_at_ms is the server-stamped wall-clock (Unix ms) when the current non-Idle turn began. It is preserved across phase→phase transitions within a single turn and cleared on transition to Idle. Used by clients to anchor the “Working… Xs” counter so it survives UI mode flicker and late subscribe.

phase_started_at_ms is the server-stamped wall-clock (Unix ms) when the current phase began. Re-stamped on every phase transition (Idle→Thinking, Thinking→ToolExec, etc.) and cleared on Idle. Used by clients to render a per-phase elapsed counter alongside the total turn elapsed so a slow tool call doesn’t keep climbing once the LLM resumes responding.

Fields

phase: AgentPhase

turn_started_at_ms: Option<u64>

phase_started_at_ms: Option<u64>

Status

Informational status message (e.g. retry notices).

Fields

message: String

Trait Implementations

impl Clone for StreamEvent

fn clone(&self) -> StreamEvent

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.

impl<'de> Deserialize<'de> for StreamEvent

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for StreamEvent

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

where __S: Serializer,

Serialize this value into the given Serde serializer.