Struct ConfidenceSignals 

pub struct ConfidenceSignals {
    pub source_age_days: f64,
    pub atom_derivation: bool,
    pub prior_corroboration_count: i64,
    pub freshness_factor: f64,
    pub baseline_per_source: f64,
}

v0.7.0 Form 5 (issue #758) — JSON snapshot of the signals that produced an auto-derived or calibrated confidence value.

Stored on memories.confidence_signals TEXT NULL (schema v39 sqlite / v38 postgres) as a JSON-encoded envelope. NULL on legacy rows and on rows whose confidence_source = 'caller_provided'. Also written verbatim into the confidence_shadow_observations.signals column per recall when shadow mode is enabled.

An auditor can reconstruct the derivation after the fact by inspecting this snapshot — the recall ranker and the forensic bundle preserve it across reads, so a downstream review never needs to re-query the substrate at the then-current state.

Fields

source_age_days: f64

Age (in days) of the source memory at the moment of derivation. Drives the freshness_factor exponent.

atom_derivation: bool

Whether the row is an atom of an existing memory (atom_of IS NOT NULL). Atom rows inherit higher base confidence because their provenance is anchored to a curator-validated parent.

prior_corroboration_count: i64

Count of related memories (via memory_links) at the moment of derivation. More corroboration → higher confidence; the formula uses log10(1 + count) to keep the bump sub-linear.

freshness_factor: f64

Pre-computed freshness factor exp(-age / half_life) clamped to [0, 1]. Stored alongside source_age_days so a future review can verify the half-life used at write time.

baseline_per_source: f64

Per-source baseline from the calibration table (median derived confidence for the row’s (namespace, source) pair). 0.5 when no calibrated baseline exists yet.

Trait Implementations

impl Clone for ConfidenceSignals

fn clone(&self) -> ConfidenceSignals

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConfidenceSignals

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

Formats the value using the given formatter.

impl Default for ConfidenceSignals

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ConfidenceSignals

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ConfidenceSignals

fn eq(&self, other: &ConfidenceSignals) -> 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 Serialize for ConfidenceSignals

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 ConfidenceSignals