Struct HostEffectFailure 

pub struct HostEffectFailure {
    pub kind: HostEffectFailureKind,
    pub message: String,
    pub retryable: Option<bool>,
}

What the host can say about a failure. No wall clock, no host path, no stack, no raw vendor error — only facts the kernel can act on and replay. Vendor diagnostics belong in the host’s own log, never in a kernel recovery decision.

Fields

kind: HostEffectFailureKind

message: String

retryable: Option<bool>

Host advice, never an instruction, and uniformly inert across all six failure kinds.

DEC-5 is what makes that stronger than a naming convention: the kernel makes exactly one policy decision per failure and never re-emits the same intent, so there is no branch for this flag to select. The decision is chosen by the effect kind the kernel itself published — never by the kind the host reports and never by this field — which is why retryable: true, retryable: false and an absent retryable must plan byte-identical steps for every one of the ten effect kinds.

A host that wants another attempt asks again with a new causation and keeps its own idempotency on the effect id / launch token. Retry ladders that a vendor would call rate-limit or unavailable back-off run entirely inside the host and never reach the kernel; when one is spent, the failure that arrives is HostEffectFailureKind::TransportExhausted and nothing else.

Trait Implementations

impl Clone for HostEffectFailure

fn clone(&self) -> HostEffectFailure

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HostEffectFailure

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for HostEffectFailure

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for HostEffectFailure

fn eq(&self, other: &HostEffectFailure) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for HostEffectFailure

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for HostEffectFailure