Struct Edge 

pub struct Edge {
    pub from: String,
    pub to: String,
    pub relation: String,
    pub evidence: String,
    pub evidence_refs: Vec<EdgeEvidence>,
    pub basis: EdgeBasis,
    pub asserted_at: u64,
    pub expires_at: Option<u64>,
}

A directed, evidence-bearing edge — a synapse in the knowledge graph.

Bi-temporal fields

asserted_at and expires_at are the temporal axis (the Graphiti idea, deterministic). Human-authored edges keep expires_at = None (stable forever). Sigil-accepted files can receive a half-life from EKF trust.agent_accepted_ttl_days: expires_at = asserted_at + TTL. The edge is not deleted — when expired, Engine policy can de-rank it and flag it for re-verification.

The runtime properties (use_count, last_used) are NOT stored here — they live in the Ryn metadata overlay (SQLite), keyed by edge identity. The graph stays deterministic; the overlay breathes.

Fields

from: String

to: String

relation: String

evidence: String

Backward-compatible compact evidence summary. When several sources assert the same edge, summaries are merged instead of dropping later evidence.

evidence_refs: Vec<EdgeEvidence>

Structured receipts for why this edge exists. The graph keeps the compact evidence string for old consumers, while agents that need auditability can inspect these receipt records.

basis: EdgeBasis

Provenance basis — the synaptic strength class. Defaults to Resolved (backward-compatible).

asserted_at: u64

When this edge was asserted (compile time, unix seconds). 0 = unknown/stable. Deterministic: the same source files always produce the same asserted_at per build.

expires_at: Option<u64>

When this edge should be re-verified. None = stable (human-authored, no decay). Some(t) = agent-accepted, decays at time t. The immune system trigger.

Trait Implementations

impl Clone for Edge

fn clone(&self) -> Edge

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Edge

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

Formats the value using the given formatter.

impl Default for Edge

fn default() -> Edge

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Edge

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Edge

fn eq(&self, other: &Edge) -> 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 Edge

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 Edge