{
  "schemaVersion": 1,
  "mode": "deterministic",
  "scenarioId": "call60-two-party-regression",
  "scenarioDescription": "Recreates the call-60 rebuild oscillation, but the paired call should still recover to healthy.",
  "fixtureId": "call-60-rebuild-oscillation",
  "generatedAt": "2026-04-26T13:13:48.921Z",
  "seed": 808,
  "pairedAnalysis": {
    "peerA": {
      "addr": "peer-A",
      "role": "root-forwarder",
      "primaryClass": "mixed",
      "secondaryClass": "transport-dominated",
      "provisionalBars": [
        {
          "metric": "packetsDroppedPendingDecryptRatePerSec",
          "observed": 0,
          "threshold": 1,
          "operator": "<",
          "passed": true,
          "description": "Decrypt drop rate < 1.0/s (decrypt pass bar)"
        },
        {
          "metric": "playoutUnderTargetFraction",
          "observed": 0.00672107537205953,
          "threshold": 0.35,
          "operator": "<=",
          "passed": true,
          "description": "Under-target fraction ≤ 0.35 (provisional jitter pass)"
        },
        {
          "metric": "playoutOutsideTargetFraction",
          "observed": 0.0070571291406625065,
          "threshold": 0.5,
          "operator": "<=",
          "passed": true,
          "description": "Outside-target fraction ≤ 0.5"
        }
      ],
      "passedAllBars": true,
      "severity": "healthy",
      "diagnosticNotes": [
        "V2-managed sources: 1; using v2 jitter summary instead of legacy Opus window fields",
        "Tick budget: 145 breaches, P95=26.0ms",
        "Transport triad: bridgeHW=22, binaryHW=16"
      ]
    },
    "peerB": {
      "addr": "peer-B",
      "role": "standby-forwarder",
      "primaryClass": "policy-dominated",
      "provisionalBars": [
        {
          "metric": "packetsDroppedPendingDecryptRatePerSec",
          "observed": 0,
          "threshold": 1,
          "operator": "<",
          "passed": true,
          "description": "Decrypt drop rate < 1.0/s (decrypt pass bar)"
        },
        {
          "metric": "playoutUnderTargetFraction",
          "observed": 0.004889975550122249,
          "threshold": 0.35,
          "operator": "<=",
          "passed": true,
          "description": "Under-target fraction ≤ 0.35 (provisional jitter pass)"
        },
        {
          "metric": "playoutOutsideTargetFraction",
          "observed": 0.005134474327628362,
          "threshold": 0.5,
          "operator": "<=",
          "passed": true,
          "description": "Outside-target fraction ≤ 0.5"
        }
      ],
      "passedAllBars": true,
      "severity": "healthy",
      "diagnosticNotes": [
        "V2-managed sources: 1; using v2 jitter summary instead of legacy Opus window fields"
      ]
    },
    "bothPassed": true,
    "worseAddr": "peer-A",
    "qualityScore": 9.223115698511762,
    "callSummary": "[Good 9.2/10] BOTH PEERS PASS — peer-A (root-forwarder): mixed, severity=healthy; peer-B (standby-forwarder): policy-dominated, severity=healthy"
  },
  "firstDegradedPeer": "peer-A",
  "firstDegradedStage": "playout",
  "likelyFixSurfaces": [
    "mixed",
    "transport-dominated",
    "policy-dominated"
  ],
  "peerA": {
    "addr": "peer-A",
    "role": "root-forwarder",
    "senderProfileId": "call60FixtureSender",
    "senderProfileLabel": "Call-60 fixture sender",
    "impairmentSummary": "Bursty transport-flap arrival shape from call-60 rebuild oscillation.",
    "metrics": {
      "avgPcmBufferedMs": 119.31445031204993,
      "avgPlayoutDeltaMs": -0.685549687950072,
      "playoutUnderTargetFraction": 0.00672107537205953,
      "playoutOutsideTargetFraction": 0.0070571291406625065,
      "playoutRateFractionBelow1": 0.15,
      "jitterUnderruns": 0,
      "missingFrames": 5,
      "concealmentTicks": 5,
      "packetsDroppedStaleTimestamp": 0,
      "packetsDroppedStaleTimestampRatePerSec": 0,
      "packetsDroppedPendingDecrypt": 0,
      "packetsDroppedPendingDecryptRatePerSec": 0,
      "pendingDecryptDepthHighWater": 0,
      "reticulumAudioBridgeQueuedFramesHighWater": 22,
      "reticulumAudioBinaryOutQueueDepthHighWater": 16,
      "reticulumAudioBridgeWaitingForDrain": true,
      "reticulumAudioQueuePressureDrops": 0,
      "reticulumAudioStaleDrops": 0,
      "avgOpusBufferedMs": 317.753240518483,
      "maxOpusBufferedMs": 320,
      "adaptiveTargetMedianMs": 120,
      "wasmFecDeferredPcmTicks": 0,
      "durationMs": 83320,
      "adaptiveNetworkMode": "steady",
      "playoutStarvationWorstSeverity": "none",
      "gcallAudioStage5BoostCumulativeMs": 0,
      "tickBudgetBreachCount": 145,
      "tickBudgetBreachP95Ms": 26,
      "tickBudgetBreachMaxMs": 26,
      "longTaskCount": 0,
      "role": "root-forwarder",
      "v2ManagedSourceCount": 1,
      "legacyWindowOpusMetricsMeaningful": false,
      "avgPcmRingBufferedMs": 219.51512241958713,
      "avgTargetBufferMs": 120
    },
    "timeline": {
      "firstIssueAtMs": 20,
      "firstIssueStage": "playout",
      "arrival": {
        "firstIssueAtMs": 238,
        "totalPackets": 4496,
        "deliveredPackets": 3908,
        "droppedPackets": 588,
        "dropRate": 0.1307829181494662,
        "staleTimestampDrops": 0,
        "maxExcessLatenessMs": 255,
        "maxTimestampRegressionMs": 180
      },
      "jitter": {
        "firstIssueAtMs": 66,
        "avgBufferedMs": 317.753240518483,
        "maxBufferedMs": 320,
        "maxDepthFrames": 16
      },
      "decode": {
        "firstIssueAtMs": 206,
        "framesDecoded": 10,
        "concealmentFrames": 5,
        "concealmentTicks": 5
      },
      "pcmRing": {
        "firstIssueAtMs": null,
        "avgBufferedMs": 219.51512241958713,
        "minBufferedMs": 0,
        "maxBufferedMs": 220,
        "underruns": 0,
        "overruns": 0
      },
      "playout": {
        "firstIssueAtMs": 20,
        "avgDeltaMs": 23.356697071531446,
        "underTargetFraction": 0.00672107537205953,
        "outsideTargetFraction": 0.0070571291406625065,
        "targetBufferMs": 120
      },
      "perf": {
        "tickBudgetBreachCount": 145,
        "tickBudgetBreachP95Ms": 26,
        "tickBudgetBreachMaxMs": 26,
        "longTaskCount": 0
      }
    },
    "stateTransitions": [
      {
        "state": "missingMedia",
        "count": 3
      },
      {
        "state": "coldStart",
        "count": 3
      },
      {
        "state": "steady",
        "count": 4160
      }
    ],
    "classification": {
      "addr": "peer-A",
      "role": "root-forwarder",
      "primaryClass": "mixed",
      "secondaryClass": "transport-dominated",
      "provisionalBars": [
        {
          "metric": "packetsDroppedPendingDecryptRatePerSec",
          "observed": 0,
          "threshold": 1,
          "operator": "<",
          "passed": true,
          "description": "Decrypt drop rate < 1.0/s (decrypt pass bar)"
        },
        {
          "metric": "playoutUnderTargetFraction",
          "observed": 0.00672107537205953,
          "threshold": 0.35,
          "operator": "<=",
          "passed": true,
          "description": "Under-target fraction ≤ 0.35 (provisional jitter pass)"
        },
        {
          "metric": "playoutOutsideTargetFraction",
          "observed": 0.0070571291406625065,
          "threshold": 0.5,
          "operator": "<=",
          "passed": true,
          "description": "Outside-target fraction ≤ 0.5"
        }
      ],
      "passedAllBars": true,
      "severity": "healthy",
      "diagnosticNotes": [
        "V2-managed sources: 1; using v2 jitter summary instead of legacy Opus window fields",
        "Tick budget: 145 breaches, P95=26.0ms",
        "Transport triad: bridgeHW=22, binaryHW=16"
      ]
    }
  },
  "peerB": {
    "addr": "peer-B",
    "role": "standby-forwarder",
    "senderProfileId": "cleanSender",
    "senderProfileLabel": "Clean sender",
    "impairmentSummary": "Low jitter, no intentional loss, stable cadence.",
    "metrics": {
      "avgPcmBufferedMs": 119.50122249388754,
      "avgPlayoutDeltaMs": -0.49877750611246086,
      "playoutUnderTargetFraction": 0.004889975550122249,
      "playoutOutsideTargetFraction": 0.005134474327628362,
      "playoutRateFractionBelow1": 0,
      "jitterUnderruns": 0,
      "missingFrames": 1,
      "concealmentTicks": 1,
      "packetsDroppedStaleTimestamp": 0,
      "packetsDroppedStaleTimestampRatePerSec": 0,
      "packetsDroppedPendingDecrypt": 0,
      "packetsDroppedPendingDecryptRatePerSec": 0,
      "pendingDecryptDepthHighWater": 0,
      "reticulumAudioBridgeQueuedFramesHighWater": 0,
      "reticulumAudioBinaryOutQueueDepthHighWater": 0,
      "reticulumAudioBridgeWaitingForDrain": false,
      "reticulumAudioQueuePressureDrops": 0,
      "reticulumAudioStaleDrops": 0,
      "avgOpusBufferedMs": 318.19959991109135,
      "maxOpusBufferedMs": 320,
      "adaptiveTargetMedianMs": 120,
      "wasmFecDeferredPcmTicks": 0,
      "durationMs": 89980,
      "adaptiveNetworkMode": "steady",
      "playoutStarvationWorstSeverity": "none",
      "gcallAudioStage5BoostCumulativeMs": 0,
      "tickBudgetBreachCount": 0,
      "tickBudgetBreachP95Ms": 0,
      "tickBudgetBreachMaxMs": 0,
      "longTaskCount": 0,
      "role": "standby-forwarder",
      "v2ManagedSourceCount": 1,
      "legacyWindowOpusMetricsMeaningful": false,
      "avgPcmRingBufferedMs": 219.60435652367192,
      "avgTargetBufferMs": 120
    },
    "timeline": {
      "firstIssueAtMs": 20,
      "firstIssueStage": "jitter",
      "arrival": {
        "firstIssueAtMs": null,
        "totalPackets": 4497,
        "deliveredPackets": 4497,
        "droppedPackets": 0,
        "dropRate": 0,
        "staleTimestampDrops": 0,
        "maxExcessLatenessMs": 5,
        "maxTimestampRegressionMs": 0
      },
      "jitter": {
        "firstIssueAtMs": 20,
        "avgBufferedMs": 318.19959991109135,
        "maxBufferedMs": 320,
        "maxDepthFrames": 16
      },
      "decode": {
        "firstIssueAtMs": 180,
        "framesDecoded": 16,
        "concealmentFrames": 1,
        "concealmentTicks": 1
      },
      "pcmRing": {
        "firstIssueAtMs": null,
        "avgBufferedMs": 219.60435652367192,
        "minBufferedMs": 0,
        "maxBufferedMs": 220,
        "underruns": 0,
        "overruns": 0
      },
      "playout": {
        "firstIssueAtMs": 20,
        "avgDeltaMs": 23.485218937541674,
        "underTargetFraction": 0.004889975550122249,
        "outsideTargetFraction": 0.005134474327628362,
        "targetBufferMs": 120
      },
      "perf": {
        "tickBudgetBreachCount": 0,
        "tickBudgetBreachP95Ms": 0,
        "tickBudgetBreachMaxMs": 0,
        "longTaskCount": 0
      }
    },
    "stateTransitions": [
      {
        "state": "missingMedia",
        "count": 3
      },
      {
        "state": "coldStart",
        "count": 3
      },
      {
        "state": "steady",
        "count": 4492
      },
      {
        "state": "backlogDrain",
        "count": 1
      }
    ],
    "classification": {
      "addr": "peer-B",
      "role": "standby-forwarder",
      "primaryClass": "policy-dominated",
      "provisionalBars": [
        {
          "metric": "packetsDroppedPendingDecryptRatePerSec",
          "observed": 0,
          "threshold": 1,
          "operator": "<",
          "passed": true,
          "description": "Decrypt drop rate < 1.0/s (decrypt pass bar)"
        },
        {
          "metric": "playoutUnderTargetFraction",
          "observed": 0.004889975550122249,
          "threshold": 0.35,
          "operator": "<=",
          "passed": true,
          "description": "Under-target fraction ≤ 0.35 (provisional jitter pass)"
        },
        {
          "metric": "playoutOutsideTargetFraction",
          "observed": 0.005134474327628362,
          "threshold": 0.5,
          "operator": "<=",
          "passed": true,
          "description": "Outside-target fraction ≤ 0.5"
        }
      ],
      "passedAllBars": true,
      "severity": "healthy",
      "diagnosticNotes": [
        "V2-managed sources: 1; using v2 jitter summary instead of legacy Opus window fields"
      ]
    }
  }
}