RAG retrieval graph

SUPERVISOR A LightRAG-style force-directed graph of the RAG corpus, at Admin → Knowledge → Knowledge Graph.

What it shows

Nodes:

• Components (per vessel)
• Makers (deduped fleet-wide)
• Models (deduped fleet-wide)
• Source documents
• UCS codes

Edges connect them by retrieval co-occurrence — when a query retrieved node A and node B together, the edge weight goes up.

Controls

• Vessel selector — single vessel or whole fleet
• Node search — live filter
• Hover — dims unrelated nodes
• Click — opens a side drawer linking back to the component page

Capped at 1,000 nodes (sorted by degree desc). When truncated, stats.truncated=true appears in the drawer header.

Implementation

Pure SVG + self-contained Verlet spring simulation, no new runtime deps. Backend: GET /api/admin/rag-graph?vesselId=<n|all> returns {nodes, edges, stats}. Pure projection function in src/rag-graph-projection.js (fully unit-tested).