Enum EventFrame 

pub enum EventFrame {
    ResponseStart {
        response_id: String,
    },
    ResponseDelta {
        response_id: String,
        delta: String,
        channel: ResponseChannel,
    },
    ResponseEnd {
        response_id: String,
    },
    ToolCallStart {
        response_id: String,
        tool_name: String,
        arguments: Value,
    },
    ToolCallResult {
        response_id: String,
        tool_name: String,
        output: Value,
    },
    McpStartupUpdate {
        update: McpStartupUpdateEvent,
    },
    McpStartupComplete {
        summary: McpStartupCompleteEvent,
    },
    McpToolCallBegin {
        server_name: String,
        tool_name: String,
    },
    McpToolCallEnd {
        server_name: String,
        tool_name: String,
        ok: bool,
    },
    ExecApprovalRequest {
        request: ExecApprovalRequestEvent,
    },
    ApplyPatchApprovalRequest {
        request: ExecApprovalRequestEvent,
    },
    UserInputRequest {
        request: UserInputRequestEvent,
    },
    ElicitationRequest {
        server_name: String,
        request_id: String,
        prompt: String,
    },
    ExecCommandBegin {
        command: String,
        cwd: String,
    },
    ExecCommandOutputDelta {
        command: String,
        delta: String,
    },
    ExecCommandEnd {
        command: String,
        exit_code: i32,
    },
    PatchApplyBegin {
        path: String,
    },
    PatchApplyEnd {
        path: String,
        ok: bool,
    },
    TurnStarted {
        turn_id: String,
    },
    TurnComplete {
        turn_id: String,
    },
    TurnAborted {
        turn_id: String,
        reason: String,
    },
    ThreadGoalUpdated {
        goal: ThreadGoal,
    },
    ThreadGoalCleared {
        thread_id: String,
    },
    Error {
        response_id: String,
        message: String,
    },
}

A single streaming event frame emitted during agent execution.

Events are tagged by the event field and cover the full lifecycle of a turn: response streaming, tool calls, MCP lifecycle, command execution, patch application, approvals, and errors.

Variants

ResponseStart

A new model response has started.

Fields

response_id: String

ResponseDelta

A incremental text delta for an in-progress response.

Fields

response_id: String

delta: String

channel: ResponseChannel

ResponseEnd

The model response has finished.

Fields

response_id: String

ToolCallStart

A tool call has begun.

Fields

response_id: String

tool_name: String

arguments: Value

ToolCallResult

A tool call has completed and produced a result.

Fields

response_id: String

tool_name: String

output: Value

McpStartupUpdate

Progress update for an MCP server starting up.

Fields

update: McpStartupUpdateEvent

McpStartupComplete

All MCP servers have finished starting.

Fields

summary: McpStartupCompleteEvent

McpToolCallBegin

An MCP tool call has begun.

Fields

server_name: String

tool_name: String

McpToolCallEnd

An MCP tool call has finished.

Fields

server_name: String

tool_name: String

ok: bool

ExecApprovalRequest

User approval is needed for a command execution.

Fields

request: ExecApprovalRequestEvent

ApplyPatchApprovalRequest

User approval is needed for applying a patch.

Fields

request: ExecApprovalRequestEvent

UserInputRequest

A model tool is requesting structured clarification input from the user.

Headless sibling of the TUI’s request_user_input modal flow. request_id correlates with an AppRequest::SubmitUserInput reply.

Fields

request: UserInputRequestEvent

ElicitationRequest

An MCP server is requesting user input (elicitation).

Fields

server_name: String

request_id: String

prompt: String

ExecCommandBegin

A command has started executing.

Fields

command: String

cwd: String

ExecCommandOutputDelta

Incremental output from a running command.

Fields

command: String

delta: String

ExecCommandEnd

A command has finished executing.

Fields

command: String

exit_code: i32

PatchApplyBegin

A patch has started being applied to a file.

Fields

path: String

PatchApplyEnd

A patch has finished being applied.

Fields

path: String

ok: bool

TurnStarted

A new turn has started within a thread.

Fields

turn_id: String

TurnComplete

A turn has completed successfully.

Fields

turn_id: String

TurnAborted

A turn was aborted before completion.

Fields

turn_id: String

reason: String

ThreadGoalUpdated

A thread goal was set or updated.

Fields

goal: ThreadGoal

ThreadGoalCleared

A thread goal was cleared.

Fields

thread_id: String

Error

An error occurred during processing.

Fields

response_id: String

message: String

Trait Implementations

impl Clone for EventFrame

fn clone(&self) -> EventFrame

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EventFrame

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for EventFrame

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for EventFrame

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

where __S: Serializer,

Serialize this value into the given Serde serializer.