Struct EffectResult 

pub struct EffectResult {
    pub event: PipelineEvent,
    pub additional_events: Vec<PipelineEvent>,
    pub ui_events: Vec<UIEvent>,
}

Result of executing an effect.

Contains both the PipelineEvent (for reducer) and optional UIEvents (for display). This separation keeps UI concerns out of the reducer while allowing handlers to emit rich feedback during execution.

Multiple Events

Some effects produce multiple reducer events. For example, agent invocation may produce:

1. InvocationSucceeded - the primary event
2. SessionEstablished - additional event when session ID is extracted

The additional_events field holds events that should be processed after the primary event. The reducer loop processes all events in order.

Fields

event: PipelineEvent

Primary event for reducer (affects state).

additional_events: Vec<PipelineEvent>

Additional events to process after the primary event.

Used for cases where an effect produces multiple events, such as agent invocation followed by session establishment. Each event is processed by the reducer in order.

ui_events: Vec<UIEvent>

UI events for display (do not affect state).

Implementations

impl EffectResult

pub fn event(event: PipelineEvent) -> Self

Create result with just a pipeline event (no UI events).

pub fn with_ui(event: PipelineEvent, ui_events: Vec<UIEvent>) -> Self

Create result with pipeline event and UI events.

pub fn with_additional_event(self, event: PipelineEvent) -> Self

Add an additional event to process after the primary event.

Used for emitting separate events like SessionEstablished after agent invocation completes. Each additional event is processed by the reducer in order.

pub fn with_ui_event(self, ui_event: UIEvent) -> Self

Add a UI event to the result.

Trait Implementations

impl Clone for EffectResult

fn clone(&self) -> EffectResult

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EffectResult

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

Formats the value using the given formatter.