Module graph 

In-memory directed graph of wiki pages and their links.

Backed by petgraph::DiGraph. Nodes are pages (real or placeholder), edges are wiki links. Used for graph visualization, backlink queries, and orphan cleanup.

Structs

GraphEdge

A directed edge in the wiki graph (source page links to target page).

GraphNode

A node in the wiki graph.

WikiGraph

In-memory directed graph of wiki pages and their [[wikilink]] connections.