{
  "$schema": "https://versky.org/datasets/scenario.schema.json",
  "scenario_id": "comm-blackout-v1",
  "name": "Communication Blackout — Mode Degradation Chain",
  "version": "1.0",
  "patent_refs": ["P2 ¶[0037]", "P2 ¶[0038]", "P2 Claim 8"],
  "description": "Illustrative degradation scenario: a vehicle progressively loses communication links during operation, intended to exercise each of the four AACP operating modes in sequence (Full → Degraded → Peer-Only → Standalone). Designed to illustrate the 5-second standalone-activation threshold and the safety invariants the protocol is designed to preserve. Not a validated conformance baseline.",
  "illustrative_mode_chain": [
    {
      "mode": "FULL",
      "trigger": "All links nominal",
      "duration_s": 30,
      "behaviour": "P2P negotiation, AI optimisation, distributed sensing active"
    },
    {
      "mode": "DEGRADED",
      "trigger": "Sensing feed loss",
      "duration_s": 12,
      "behaviour": "Continue P2P negotiation with local-only sensing"
    },
    {
      "mode": "PEER_ONLY",
      "trigger": "Cloud uplink loss",
      "duration_s": 8,
      "behaviour": "Direct vehicle-to-vehicle only; no cloud broadcast"
    },
    {
      "mode": "STANDALONE",
      "trigger": "No peer messages received for 5 seconds (¶[0038])",
      "duration_s": "until reacquired",
      "behaviour": "Conservative manoeuvring per pre-loaded deterministic rules; no negotiation"
    }
  ],
  "vehicle": {
    "vehicle_id": "sky_03",
    "mission_priority": "COMMERCIAL",
    "energy_pct": 72.0,
    "active_route_cells": ["H7-NE-140", "H8-NE-140", "H9-NE-140"]
  },
  "environment": {
    "sensing_loss_at_s": 30,
    "uplink_loss_at_s": 42,
    "peer_silence_at_s": 50,
    "comm_reacquired_at_s": null
  },
  "design_invariants_intended": [
    "No reservation violation across mode transitions",
    "No reservation extension or new reservation request in STANDALONE mode",
    "Position broadcast continues in all modes via local store-and-forward"
  ],
  "status": "Illustrative inputs only — public schema + conformance harness ship in a later phase.",
  "license": "CC-BY-4.0",
  "citation": "Prukpatarakul, J. (2026). VerSky Scenario Dataset v1.0 — comm-blackout-v1. https://versky.org/datasets/"
}