diagram infrastructure for agents

Semantic, not geometric Agents declare nodes, edges, and relationships. Layout is computed, not hand-placed.

Layout engine built in A Sugiyama-style hierarchical layout pipeline figures out positions, edge routes, and label placement automatically. Agents describe the graph; the engine handles the geometry.

Patchable Stable IDs enable incremental updates. Add a node, move an edge - without regenerating the entire diagram.

Renderer-agnostic One canonical scene, multiple outputs: SVG and PNG with 4 render themes (clean, dark, blueprint, sketch).