Graphviz

graphviz is a DOT-based diagramming skill for creating automatically laid out directed and undirected graphs. Use it for dependency trees, call graphs, package hierarchies, ownership maps, and other graphviz for Diagramming use cases where readable structure matters more than manual positioning. It helps agents produce valid DOT with fewer render errors.

Use security-ownership-map to analyze git history for security ownership risk, bus factor, and sensitive-code ownership. It maps people to files, surfaces orphaned or under-owned areas, and exports CSV/JSON for graph analysis. Best for security audit questions, CODEOWNERS reality checks, and ownership clusters grounded in commit history.