Enum ReasonCode 

pub enum ReasonCode {
    SustainedLatencyDrift,
    ConsensusHeartbeatDegradation,
    AsyncRuntimeStarvation,
    ChannelBackpressureOnset,
    PartialPartitionSignature,
    ClockDriftDivergence,
    MemoryPressureEscalation,
    ThroughputDegradation,
    SerializationDrift,
    FlowControlExhaustion,
    UnclassifiedStructuralAnomaly,
    NoAnomaly,
}

Reason codes for distributed system structural interpretations.

Each variant encodes a specific structural pattern recognized by the heuristics bank. UnclassifiedStructuralAnomaly is emitted when the grammar state transitions to Boundary or Violation but no heuristic entry matches.

Variants

SustainedLatencyDrift

Sustained monotonic increase in latency residuals across multiple observation windows, consistent with resource exhaustion or degradation.

ConsensusHeartbeatDegradation

Consensus heartbeat round-trip time shows persistent directional drift toward election timeout boundary.

AsyncRuntimeStarvation

Tokio runtime task poll duration increasing monotonically, consistent with blocking operations in async context or runtime starvation.

ChannelBackpressureOnset

Bounded channel queue depth approaching capacity with characteristic drift-then-slew signature at backpressure onset.

PartialPartitionSignature

Asymmetric connectivity pattern: some node pairs communicate normally while others show persistent latency drift or packet loss.

ClockDriftDivergence

Clock source divergence between nodes producing monotonic drift in timestamp-derived residuals.

MemoryPressureEscalation

RSS or allocation rate showing persistent growth trajectory beyond admissibility envelope for the current workload phase.

ThroughputDegradation

Throughput (ops/sec or bytes/sec) showing persistent decline not attributable to workload reduction.

SerializationDrift

Serialization or deserialization latency increasing with characteristic step-change at payload size or schema version boundaries.

FlowControlExhaustion

gRPC or HTTP/2 flow control window approaching exhaustion with characteristic drift-then-violation pattern.

UnclassifiedStructuralAnomaly

Grammar state transitioned but no heuristic bank entry matched.

NoAnomaly

No anomaly detected. Residual trajectory remains within admissibility envelope. Grammar state is Admissible.

Implementations

impl ReasonCode

pub fn description(&self) -> &'static str

Returns a human-readable description of this reason code.

Trait Implementations

impl Clone for ReasonCode

fn clone(&self) -> ReasonCode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ReasonCode

impl Debug for ReasonCode

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

Formats the value using the given formatter.

impl Eq for ReasonCode

impl PartialEq for ReasonCode

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ReasonCode