Struct Metric 

pub struct Metric {
    pub name: String,
    pub value: f64,
    pub polarity: Polarity,
    pub unit: String,
    pub stream: MetricStream,
}

A single extracted metric from a payload’s output.

Populated by the extraction pipeline after the payload exits. Sidecar serialization carries these alongside the pass/fail verdict so test-stats can classify regressions across runs.

Fields

name: String

Dotted-path name matching the JSON leaf.

value: f64

Numeric value.

polarity: Polarity

Regression direction, copied from the matching MetricHint or left as Polarity::Unknown when no hint matches.

unit: String

Display unit string; empty when no unit was declared.

stream: MetricStream

Which of the payload’s output streams the metric was read from — stdout on the happy path, stderr under the stderr-fallback contract. See MetricStream for the “well-behaved payloads keep stdout canonical” review hint.

Trait Implementations

impl Clone for Metric

fn clone(&self) -> Metric

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Metric

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Metric

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Metric

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

where __S: Serializer,

Serialize this value into the given Serde serializer.