Implement persistent World Graph MVP with Supabase vectors, edges, and Guardian safety output

[Copilot]

Summary

This PR delivers the Phase 1 World Graph MVP by persisting lore/character/location graph state, storing vectorized node data, and adding relationship edge persistence. It also wires SIS memory sync visibility and returns Guardian safety status in world graph responses.

Changes

• Graph persistence + SIS sync

  • Persist world graph snapshots to ~/.arcanea/sis-world-graphs.json.
  • Load snapshots on access and sync after node/edge mutations.
  • Expose SIS sync metadata in get_world_graph.

• Supabase-backed world graph storage

  • Added migration for world_graph_nodes and world_graph_edges with constraints and indexes.
  • Added match_world_graph_nodes(...) for embedding similarity retrieval.
  • Added best-effort MCP persistence to Supabase REST for nodes/edges when service-role env vars are present.

• Vector embeddings for graph nodes

  • Added deterministic 64-d embedding generation for node semantic representation.
  • Persist embeddings with node records and include supporting metadata.

• Guardian safety check

  • Added runGuardianSafetyCheck(sessionId) to flag unsafe graph states (invalid gate values, self-links, high-adversarial edges).
  • Included guardianSafety in get_world_graph output.

• Targeted MCP test coverage

  • Added tests for deterministic embedding shape/content, safe graph report, and SIS sync file creation.

const summary = getGraphSummary(sessionId);
const safety = runGuardianSafetyCheck(sessionId);

return {
  worldSummary: summary,
  guardianSafety: safety,
  sisSync: { status: "synced", storagePath: getSisWorldGraphFilePath() },
};

Type

• Feature (new functionality)
• Fix (bug fix)
• Refactor (code improvement, no behavior change)
• Docs (documentation only)
• Lore (universe content, Library texts)

Checklist

• TypeScript compiles with zero errors (pnpm build)
• Changes align with ARCANEA_CANON.md (if lore-related)
• No new any types introduced
• Tested locally or verified in Vercel preview

Original prompt

Phase 1 Deliverable: Implement persistent World Graph MVP using Supabase + vector embeddings + edge relationships for lore/characters/locations. Ensure SIS memory sync. High quality, with tests and Guardian safety check. Make it beautiful and Arcanea-native.

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Project	Deployment	Actions	Updated (UTC)
arcanea-2	Error		Jun 17, 2026 1:47am
arcanea-web	Ready	Preview, Comment, Open in v0	Jun 17, 2026 1:47am

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