# VEX & Graph (Excititor) · PostgreSQL Verification Report
Date: 2025-12-05
Status: PASS

## Scope
- Backend: `StellaOps.Excititor.Storage.Postgres`
- Storage: PostgreSQL (schema `vex`)
- Coverage: projects, graph_revisions, graph_nodes, graph_edges, statements, observations, linksets/events, consensus/holds, unknowns, evidence_manifests, cvss_receipts, attestations, timeline_events
- Approach: Postgres-only baseline; determinism verified across repeated runs on fixed SBOM + feed snapshot + policy version inputs.

## Environment
- PostgreSQL 17 (staging)
- Migrations: `V001_CreateVexSchema` applied; no pending release migrations
- Persistence: `Persistence:Excititor = Postgres`

## Results
- Determinism: PASS (revision_id stable across 5 runs; node/edge ordering deterministic)
- Graph storage: PASS (bulk insert; traversal queries indexed)
- VEX statements: PASS (status/justification/evidence preserved)
- Performance smoke: graph compute for medium SBOM (~5k nodes) completed in < 2.5s on staging hardware
- Tenant isolation: PASS

## Notes
- Fresh-start; no Mongo graph/VEX backfill performed (aligned with Phase 5 fresh-start).

## Issues / Follow-ups
- None observed; monitor node/edge volume growth for partitioning needs.

## Sign-off
- QA: ✓
- Tech Lead: ✓