{
  "spec_version": "0.1",
  "record_type": "activity",
  "id": "activity-synthetic-001",
  "subject_ref": "synthetic-user-a",
  "provider_ref": "synthetic-provider",
  "source_ref": "synthetic-meter-001",
  "created_at": "2026-01-02T00:00:00Z",
  "start": "2026-01-01T00:00:00Z",
  "end": "2026-01-02T00:00:00Z",
  "category": "electricity",
  "quantity": {
    "value": 10,
    "unit": "kWh"
  },
  "quality": "estimated",
  "coverage": {
    "status": "complete",
    "reason": "Synthetic fixture only; no real observation."
  },
  "boundary": {
    "description": "SYNTHETIC operational electricity fixture, not a user inventory",
    "geography": "EXAMPLE-ONLY"
  },
  "consent_ref": "synthetic-consent-not-a-token",
  "supersedes": null
}