ADR-CE-010: Domain-Agnostic Nodes and Edges

Status: Accepted Date: 2026-01-22 Parent: ADR-014 Coherence Engine Architecture

Context

To support multiple domains with a single substrate, the node and edge types must be generic enough to represent:

AI agent beliefs and citations
Financial trades and market dependencies
Medical vitals and physiological relationships
Security identities and policy rules

Decision

Domain-agnostic nodes/edges - facts, trades, vitals, hypotheses all use same substrate.

Node structure:

pub struct SheafNode {
    pub id: NodeId,
    pub state: Vec<f32>,      // Fixed-dimension embedding
    pub metadata: Metadata,   // Domain-specific tags
    pub updated_at: Timestamp,
}

Edge structure:

pub struct SheafEdge {
    pub source: NodeId,
    pub target: NodeId,
    pub weight: f32,
    pub rho_source: RestrictionMap,
    pub rho_target: RestrictionMap,
}

Domain mapping happens in metadata and restriction map design.

Consequences

Benefits

Single codebase for all domains
Type safety through metadata validation
Restriction maps encode domain semantics

Risks

Embedding dimension must be chosen carefully
Metadata schema needs governance

References

ADR-014: Coherence Engine Architecture, Section 1
ADR-CE-009: Single Coherence Object

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