Struct UcmEdge 

pub struct UcmEdge {
    pub relation_type: RelationType,
    pub confidence: f64,
    pub evidence: Vec<EvidenceSource>,
    pub discovered_at: DateTime<Utc>,
    pub verified_at: Option<DateTime<Utc>>,
    pub decay_rate: f64,
}

An edge in the context graph with confidence scoring and provenance.

Fields

relation_type: RelationType

What kind of relationship this represents

confidence: f64

Fused confidence score in [0.0, 1.0] Updated via Bayesian fusion from multiple evidence sources

evidence: Vec<EvidenceSource>

Individual evidence sources that contributed to this edge

discovered_at: DateTime<Utc>

When this edge was first discovered

verified_at: Option<DateTime<Utc>>

When this edge was last verified (by test, trace, or re-analysis)

decay_rate: f64

Decay rate (lambda) for temporal confidence decay

• Import statements: λ ≈ 0.001 (very slow decay)
• Call graph edges: λ ≈ 0.005 (slow decay)
• Heuristic inferences: λ ≈ 0.05 (moderate decay)
• API traffic patterns: λ ≈ 0.1 (fast decay)

Implementations

impl UcmEdge

pub fn new( relation_type: RelationType, source: DiscoverySource, confidence: f64, description: impl Into<String>, ) -> Self

Create a new edge with a single initial evidence source.

pub fn add_evidence( &mut self, source: DiscoverySource, confidence: f64, description: impl Into<String>, )

Add new evidence and re-fuse confidence using Bayesian update.

When sources agree, confidence compounds; when they conflict, the system expresses uncertainty rather than picking a winner.

pub fn decayed_confidence(&self) -> f64

Get the current confidence after applying temporal decay.

confidence(t) = base_confidence × exp(-λ × days_since_verification) Reference: TempValid framework (ACL 2024)

pub fn verify(&mut self)

Mark this edge as recently verified (resets decay timer).

impl UcmEdge

pub fn relation_type_str(&self) -> &str

Trait Implementations

impl Clone for UcmEdge

fn clone(&self) -> UcmEdge

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UcmEdge

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for UcmEdge

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for UcmEdge

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

where __S: Serializer,

Serialize this value into the given Serde serializer.