Module graph 

The minimalist in-memory property graph — Rust port of org.platformlambda.core.graph.MiniGraph (+ SimpleNode, SimpleConnection, SimpleRelationship): nodes with types and untyped properties, unidirectional connections carrying optional typed relations, alias/id/type/property lookups, neighbor traversal and BFS path discovery. Designed for a few hundred nodes held entirely in memory — deliberately never a database (the repo vision’s non-goal); the Active Knowledge Graph layer (layer 3) builds on it.

Ownership model (the one Rust translation): Java hands out shared mutable SimpleNode objects; here nodes, connections and relations are Arc-shared with interior mutability, so engine code can hold node handles and mutate properties exactly like the Java callers do. Property values are rmpv::Value — the same currency as envelope bodies and the layer-2 state machine.

Structs

GraphProperties

Shared property-bag behavior (Java GraphProperties).

MiniGraph

The mini-graph (Java MiniGraph): an in-memory property graph designed to handle a small number of nodes very efficiently (default cap 750).

SimpleConnection

A unidirectional connection between two nodes, optionally carrying typed relations (Java SimpleConnection). Equality is by connection id.

SimpleNode

A graph node (Java SimpleNode): unique alias, one or more types, and a property bag. Shared by Arc; equality is by node id.

SimpleRelationship

A typed relation on a connection (Java SimpleRelationship).