Enum Evt 

pub enum Evt {
    SessionStart(Box<SessionInitialized>),
    SessionUpdated(Box<SessionInitialized>),
    ExtensionRefreshed(Box<ExtensionRefreshed>),
    SessionEnd {
        session_id: Id,
        reason: SessionEndReason,
        usage: Usage,
    },
    UserInput(String),
    ShellOutput {
        command: String,
        stdout: String,
        stderr: String,
        exit_code: Option<i32>,
    },
    AgentMessage(String),
    Thinking(String),
    MessageDelta(String),
    ThinkingDelta(String),
    Info(String),
    InfoBlockStart {
        id: String,
        header: String,
        loading: bool,
    },
    InfoBlockAppend {
        id: String,
        detail: String,
    },
    Error(String),
    ToolStart(ToolUse),
    ToolUpdate(ToolUpdate),
    ToolEnd(ToolEnd),
    CompactStart,
    CompactEnd {
        summary: Option<String>,
    },
    TurnStart {
        turn_id: Id,
    },
    TurnPause {
        turn_id: Id,
        reason: TurnPauseReason,
    },
    TurnResume {
        turn_id: Id,
    },
    TurnEnd {
        turn_id: Id,
        status: TurnEndStatus,
        steps: usize,
    },
    UsageUpdate {
        usage: Usage,
        context: Option<ContextWindow>,
    },
    ContextReport(ContextBreakdown),
    Ambient {
        kind: AmbientKind,
        req_id: u64,
        text: String,
    },
    Goodbye,
}

Variants

SessionStart(Box<SessionInitialized>)

SessionUpdated(Box<SessionInitialized>)

ExtensionRefreshed(Box<ExtensionRefreshed>)

SessionEnd

The session span closed. Mirrors TurnEnd: carries the span’s identity, why it ended, and its final usage accounting.

Fields

session_id: Id

reason: SessionEndReason

usage: Usage

UserInput(String)

ShellOutput

Fields

command: String

stdout: String

stderr: String

exit_code: Option<i32>

AgentMessage(String)

Thinking(String)

MessageDelta(String)

ThinkingDelta(String)

Info(String)

InfoBlockStart

Open a grouped Info entry with header. Subsequent InfoBlockAppend events with the same id are rendered as tree-indented child lines under it. Use for multi-step background notifications (e.g. MCP warm-up) that should visually cluster.

When loading is true the renderer appends an animated ./../... suffix to the header until the first InfoBlockAppend arrives, signalling that background work is still in flight.

Fields

id: String

header: String

loading: bool

InfoBlockAppend

Append a child detail line to the InfoBlockStart with the same id. Drops silently if the matching block isn’t present.

Fields

id: String

detail: String

Error(String)

ToolStart(ToolUse)

ToolUpdate(ToolUpdate)

ToolEnd(ToolEnd)

CompactStart

CompactEnd

Compaction finished. summary is the text that replaced the compacted history and carries forward as the session’s context; None when compaction failed (history unchanged) or produced no displayable text.

Fields

summary: Option<String>

TurnStart

Fields

turn_id: Id

TurnPause

Fields

turn_id: Id

reason: TurnPauseReason

TurnResume

The turn resumed after a TurnPause (e.g. the approval was answered or a steer arrived). Closes the pause bracket so clients never have to infer resumption from the next tool event.

Fields

turn_id: Id

TurnEnd

Fields

turn_id: Id

status: TurnEndStatus

steps: usize

Number of turn-loop steps attempted before the turn ended.

UsageUpdate

Fields

usage: Usage

context: Option<ContextWindow>

Context-window occupancy for the root session, pre-calculated in core. None before the first response or when the model’s context limit is unverified (so clients never render a confidently-wrong percentage).

ContextReport(ContextBreakdown)

Answer to Op::ContextReport: a per-category breakdown of the session’s context-window occupancy at the time of the request.

Ambient

An ephemeral ambient hint produced off the main conversation (a predicted “thinking phrase” for the draft, or a suggested next prompt — see AmbientKind). Never persisted to the event log. req_id lets clients drop superseded results.

Fields

kind: AmbientKind

req_id: u64

text: String

Goodbye

Trait Implementations

impl Clone for Evt

fn clone(&self) -> Evt

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Evt

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Evt

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Evt

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

where __S: Serializer,

Serialize this value into the given Serde serializer.