Enum HostEvent 

pub enum HostEvent {
    PendingWindowEnqueued {
        label: String,
        queue_len_after: usize,
        version: u64,
    },
    PendingWindowDequeued {
        label: String,
        queue_len_after: usize,
        version: u64,
    },
    PendingWindowQueueEmpty {
        version: u64,
    },
    BrowserPaneCreateRequested {
        block_id: String,
        label: String,
        version: u64,
    },
    BrowserPaneLive {
        block_id: String,
        label: String,
        version: u64,
    },
    BrowserPaneClosing {
        block_id: String,
        version: u64,
    },
    BrowserPaneClosed {
        block_id: String,
        version: u64,
    },
    BrowserPaneCreationFailed {
        block_id: String,
        reason: String,
        version: u64,
    },
    BrowserRegistered {
        label: String,
        kind: BrowserKind,
        version: u64,
    },
    BrowserUnregistered {
        label: String,
        version: u64,
    },
    DragStarted {
        drag_id: String,
        source_window: String,
        version: u64,
    },
    DragEnded {
        drag_id: String,
        outcome: DragOutcome,
        version: u64,
    },
    PoolWindowEntered {
        label: String,
        queue_len_after: usize,
        version: u64,
    },
    PoolWindowLeft {
        label: String,
        queue_len_after: usize,
        reason: PoolLeaveReason,
        version: u64,
    },
    PoolEmpty {
        version: u64,
    },
    QuitDraining {
        reason: QuitReason,
        version: u64,
    },
    QuitReady {
        version: u64,
    },
    TopLevelCreationRequested {
        creation_id: u64,
        source: TopLevelSource,
        label: String,
        version: u64,
    },
    TopLevelCreationStarted {
        creation_id: u64,
        label: String,
        version: u64,
    },
    TopLevelCreationCompleted {
        creation_id: u64,
        label: String,
        latency_ms: u64,
        version: u64,
    },
    TopLevelCreationFailed {
        creation_id: u64,
        label: String,
        outcome: TopLevelCreationOutcome,
        version: u64,
    },
    TopLevelQueueLengthChanged {
        len: usize,
        version: u64,
    },
    WindowOpacityApplied {
        label: String,
        opacity: f32,
        version: u64,
    },
    WindowOpacityCleared {
        label: String,
        version: u64,
    },
    Effect {
        effect: EffectKind,
        version: u64,
    },
    Error {
        message: String,
        version: u64,
    },
}

Events emitted by the host reducer.

F.1 keeps these in-host: subscribers log them via tracing for observability, but no IPC propagation. When a future PR adds a wire-level consumer (host→launcher event for cross-process saga observability, frontend dispatcher in E.6), that PR promotes the relevant variants to agentmux-common::ipc::Event.

Variants

PendingWindowEnqueued

A PendingWindowCreation was enqueued. Carries a snapshot of the current queue length so observers can spot pile-ups.

Fields

label: String

queue_len_after: usize

version: u64

PendingWindowDequeued

A PendingWindowCreation was dequeued. The popped entry travels back to the caller; observers see only the label and post-pop queue length.

Fields

label: String

queue_len_after: usize

version: u64

PendingWindowQueueEmpty

DequeuePendingWindowCreation ran on an empty queue. Caller is responsible for the fallback (the legacy code paths synthesize a UUID-labelled FullInstance entry).

Fields

version: u64

BrowserPaneCreateRequested

Fields

block_id: String

label: String

version: u64

BrowserPaneLive

Fields

block_id: String

label: String

version: u64

BrowserPaneClosing

Fields

block_id: String

version: u64

BrowserPaneClosed

Fields

block_id: String

version: u64

BrowserPaneCreationFailed

Fields

block_id: String

reason: String

version: u64

BrowserRegistered

Fields

label: String

kind: BrowserKind

version: u64

BrowserUnregistered

Fields

label: String

version: u64

DragStarted

Fields

drag_id: String

source_window: String

version: u64

DragEnded

Fields

drag_id: String

outcome: DragOutcome

version: u64

PoolWindowEntered

Fields

label: String

queue_len_after: usize

version: u64

PoolWindowLeft

Fields

label: String

queue_len_after: usize

reason: PoolLeaveReason

version: u64

PoolEmpty

Fields

version: u64

QuitDraining

Fields

reason: QuitReason

version: u64

QuitReady

Fields

version: u64

TopLevelCreationRequested

Fields

creation_id: u64

source: TopLevelSource

label: String

version: u64

TopLevelCreationStarted

Fields

creation_id: u64

label: String

version: u64

TopLevelCreationCompleted

Fields

creation_id: u64

label: String

latency_ms: u64

version: u64

TopLevelCreationFailed

Fields

creation_id: u64

label: String

outcome: TopLevelCreationOutcome

version: u64

TopLevelQueueLengthChanged

Fields

len: usize

version: u64

WindowOpacityApplied

Opacity set successfully. IPC handler applies Win32 side-effect.

Fields

label: String

opacity: f32

version: u64

WindowOpacityCleared

Opacity cleared (opacity >= 1.0 → remove WS_EX_LAYERED).

Fields

label: String

version: u64

Effect

Side-effect descriptor. The reducer emits these but never executes them; AppState::host_dispatch_with_effects is responsible for running each kind. See EffectKind for variants.

Fields

effect: EffectKind

version: u64

Error

A command was rejected. Mirrors Event::Error in srv/launcher reducers — kept generic for future arms.

Fields

message: String

version: u64

Trait Implementations

impl Clone for HostEvent

fn clone(&self) -> HostEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HostEvent

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

Formats the value using the given formatter.