Structural signal. You describe the system, the tool computes structural facts. All computation is deterministic — no AI inside. EN syntax: subject do: action needs: inputs yields: outputs.

Render an EN dependency graph as a publication-quality SVG image.

Deep structural analysis — concurrency, flow landmarks, resilience, dominator tree, min-cuts.

Shortest path between two nodes with subsystem crossing annotations.

Structural diff between two systems — topology, role, and subsystem changes.

Follow directed flow from node A to node B with role and subsystem annotations.

Extract a named subsystem as standalone EN source code.

Blast radius — remove a node and see what disconnects.

Dry-run architectural changes — apply a patch and see the structural delta.

Betweenness centrality for a node — what fraction of all shortest paths flow through it.

Auto-discover subsystem boundaries from dependency structure.

Merge two EN graphs into one with entity linking.