Core concepts
Topic nodes are the graph backbone.
Each topic node summarizes a segment, carries an embedding, and participates in topic-level recall and grafting.
How topic nodes organize memory
A topic node is the durable summary of a segment. It lets MemoGrafter search for a broad theme before choosing the more specific memory facts attached to it.
Developers usually see topic nodes in Studio, graft previews, graph snapshots, and advanced retrieval debugging. They are the backbone that gives memory shape instead of leaving facts as a flat list.
Important fields
label and summary extracted from a segment.embedding for semantic topic search.messageRange, topicOrder, and driftScore for provenance.tags for project, planning, week, domain, or worker routing filters.suppressed lifecycle state for active read filtering.