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Evidence Subgraph UI Visualization

Module

Attestor

Status

PARTIALLY_IMPLEMENTED

Description

Backend proof graph model is implemented (nodes, edges, subgraphs, paths). Evidence panel e2e tests exist. Full frontend visualization component status unclear from source search alone.

What's Implemented

  • Proof Graph Model: src/Attestor/__Libraries/StellaOps.Attestor.ProofChain/Graph/InMemoryProofGraphService.cs (with .Mutation, .Queries, .Subgraph) -- graph service with node/edge management, subgraph extraction, and path queries.
  • Graph Node: Graph/ProofGraphNode.cs -- node model with type and metadata.
  • Graph Edge: Graph/ProofGraphEdge.cs -- edge model with type linking nodes.
  • Graph Node/Edge Types: Graph/ProofGraphNodeType.cs, Graph/ProofGraphEdgeType.cs -- typed node and edge enumerations.
  • Graph Path: Graph/ProofGraphPath.cs -- path through the proof graph.
  • Graph Subgraph: Graph/ProofGraphSubgraph.cs -- extracted subgraph for a specific subject.

What's Missing

  • Frontend graph visualization component: No Angular component rendering the proof graph as an interactive visualization (nodes as circles/rectangles, edges as arrows).
  • Interactive exploration: No click-to-expand, zoom, pan, or filter functionality for graph navigation in the UI.
  • Subgraph API endpoint: The WebService controllers do not expose a dedicated endpoint for fetching proof graph subgraphs for a given subject.
  • Graph layout algorithm: No force-directed or hierarchical layout algorithm for rendering the graph in 2D.
  • Evidence node detail panel: No side panel showing node details (attestation content, verification status) when a node is selected.

Implementation Plan

  • Add a REST endpoint in ProofChainController for subgraph queries by subject
  • Create an Angular component using a graph visualization library (e.g., D3.js or Cytoscape.js)
  • Implement interactive exploration (zoom, pan, click-to-expand, filtering by node/edge type)
  • Add a node detail panel showing attestation content and verification status
  • Implement graph layout algorithm (hierarchical for proof chains, force-directed for evidence graphs)
  • Add e2e tests for graph rendering and interaction

Related Documentation

  • Source: See feature catalog