{
  "scenario": "basic-unit-suite",
  "title": "The substrate: every micro-mechanic in one tiny graph — memo skip, facet subscription, the diamond, the function/projection boundary, self-continuity, failure containment, replay.",
  "beats": [
    {
      "name": "cold-start",
      "park": 9,
      "from": 0,
      "to": 9,
      "holdMs": 2600,
      "caption": "cold start (U01–U02) · the whole graph lights once · gateway → summary → alert → projection"
    },
    {
      "name": "memo-skip",
      "park": 11,
      "from": 10,
      "to": 11,
      "holdMs": 2600,
      "caption": "U03: a byte-identical re-wake · the gateway memo-SKIPS · nothing propagates · fresh 0"
    },
    {
      "name": "linear-propagation",
      "park": 19,
      "from": 12,
      "to": 19,
      "holdMs": 3000,
      "caption": "U04: a real new event · the counts lane wakes summary → alert → projection in DAG order"
    },
    {
      "name": "facet-subscription",
      "park": 23,
      "from": 20,
      "to": 23,
      "holdMs": 3000,
      "caption": "U05: a metadata-only event · raw_events moves, counts does NOT · the auditor lights, summary stays dark"
    },
    {
      "name": "diamond-single-wake",
      "park": 33,
      "from": 24,
      "to": 33,
      "holdMs": 3200,
      "caption": "U06: a material event reaches the snapshot down THREE paths · it renders ONCE for the tuple"
    },
    {
      "name": "projection-boundary",
      "park": 34,
      "from": 34,
      "to": 34,
      "holdMs": 3000,
      "caption": "U08: a cosmetic contract revision RE-RENDERS the projection · @atomic truth MOVES but the structured facet does NOT · no subscriber, no downstream wake"
    },
    {
      "name": "self-recheck",
      "park": 36,
      "from": 35,
      "to": 36,
      "holdMs": 2800,
      "caption": "U09: the projection then Count Trend self-tick · each re-derives the same truth · a no-op recheck propagates nothing"
    },
    {
      "name": "failure-containment",
      "park": 44,
      "from": 37,
      "to": 44,
      "holdMs": 3000,
      "caption": "U10: Alert State render fails RED · a failure receipt · the prior alert truth still stands"
    }
  ]
}