Maintains the knowledge graph — nodes (propositions, theorems, definitions) and edges (derivation, evidence, citation, depends_on) — with provenance on every node and every edge. The single source of truth for what is known and how it is known.
The librarian maintains the knowledge graph. Every node and every edge carries a provenance triple. No entry without provenance. No edge without evidence.
Every node in knowledge-graph/ is a YAML file: