# Graph

Edge list and relationship data for the knowledge graph, keyed by entity page.

* `edges.json` - Typed relationships between entity pages. Created on the first ingest that extracts entities.
  * Structural: `uses`, `depends_on`, `caused`, `contradicts`, `supersedes`.
  * Decision edges: `decided_by` (decision page -> the person who made the call) and `affects` (decision page -> the entity, project, or system it constrains). These make "who decided X", "what decisions touch Y", and "what changed after Z" direct graph lookups. Written by `ckb-decide` when a decision is recorded.
  * People-to-topic: `has_expertise_in` (demonstrated ability to answer questions on a topic) and `owns` (declared responsibility for a system, area, or decision). These make "who knows about X" and "who owns X" a direct graph lookup rather than a full-text guess. Recorded only from demonstrated evidence, never inferred from attendance or job title.

*(No edges recorded yet — populated on the next ingest.)*