{
  "schemaVersion": 1,
  "mode": "deterministic",
  "scenarioId": "phil-kenny-derived-regression",
  "scenarioDescription": "Offline deterministic regression derived from the real phil-kenny pair: one side sees mixed transport/stall pressure while the other sees severe stale timestamp dropping.",
  "fixtureId": null,
  "generatedAt": "2026-04-26T13:13:48.174Z",
  "seed": 1001,
  "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": 0.021052631578947368,
          "threshold": 0.35,
          "operator": "<=",
          "passed": true,
          "description": "Under-target fraction ≤ 0.35 (provisional jitter pass)"
        },
        {
          "metric": "playoutOutsideTargetFraction",
          "observed": 0.02210526315789474,
          "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: 180 breaches, P95=40.0ms",
        "Transport triad: bridgeHW=24, binaryHW=18"
      ]
    },
    "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": 0.15699481865284973,
          "threshold": 0.35,
          "operator": "<=",
          "passed": true,
          "description": "Under-target fraction ≤ 0.35 (provisional jitter pass)"
        },
        {
          "metric": "playoutOutsideTargetFraction",
          "observed": 0.1648445595854922,
          "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",
        "Stale timestamp drops: 202 (6.53/s); inspect sourceTimestampLateness gating before playout policy tuning"
      ]
    },
    "bothPassed": true,
    "worseAddr": "peer-B",
    "qualityScore": 8.872020725388602,
    "callSummary": "[Good 8.9/10] BOTH PEERS PASS — peer-A (root-forwarder): mixed, severity=healthy; peer-B (standby-forwarder): policy-dominated, severity=healthy"
  },
  "firstDegradedPeer": "peer-A",
  "firstDegradedStage": "jitter",
  "likelyFixSurfaces": [
    "mixed",
    "transport-dominated",
    "policy-dominated"
  ],
  "peerA": {
    "addr": "peer-A",
    "role": "root-forwarder",
    "senderProfileId": "philKennyTransportSender",
    "senderProfileLabel": "Phil-Kenny transport/stall sender",
    "impairmentSummary": "Derived from the real phil-kenny capture: bridge pressure, latency spikes, and tick stalls on the worse peer path.",
    "metrics": {
      "avgPcmBufferedMs": 117.85263157894737,
      "avgPlayoutDeltaMs": -2.147368421052633,
      "playoutUnderTargetFraction": 0.021052631578947368,
      "playoutOutsideTargetFraction": 0.02210526315789474,
      "playoutRateFractionBelow1": 0.15,
      "jitterUnderruns": 0,
      "missingFrames": 2,
      "concealmentTicks": 2,
      "packetsDroppedStaleTimestamp": 0,
      "packetsDroppedStaleTimestampRatePerSec": 0,
      "packetsDroppedPendingDecrypt": 0,
      "packetsDroppedPendingDecryptRatePerSec": 0,
      "pendingDecryptDepthHighWater": 0,
      "reticulumAudioBridgeQueuedFramesHighWater": 24,
      "reticulumAudioBinaryOutQueueDepthHighWater": 18,
      "reticulumAudioBridgeWaitingForDrain": true,
      "reticulumAudioQueuePressureDrops": 0,
      "reticulumAudioStaleDrops": 0,
      "avgOpusBufferedMs": 312,
      "maxOpusBufferedMs": 320,
      "adaptiveTargetMedianMs": 120,
      "wasmFecDeferredPcmTicks": 0,
      "durationMs": 20900,
      "adaptiveNetworkMode": "steady",
      "playoutStarvationWorstSeverity": "none",
      "gcallAudioStage5BoostCumulativeMs": 0,
      "tickBudgetBreachCount": 180,
      "tickBudgetBreachP95Ms": 40,
      "tickBudgetBreachMaxMs": 40,
      "longTaskCount": 0,
      "role": "root-forwarder",
      "v2ManagedSourceCount": 1,
      "legacyWindowOpusMetricsMeaningful": false,
      "avgPcmRingBufferedMs": 217.5693779904306,
      "avgTargetBufferMs": 120
    },
    "timeline": {
      "firstIssueAtMs": 20,
      "firstIssueStage": "jitter",
      "arrival": {
        "firstIssueAtMs": 141,
        "totalPackets": 1541,
        "deliveredPackets": 1512,
        "droppedPackets": 29,
        "dropRate": 0.01881894873458793,
        "staleTimestampDrops": 0,
        "maxExcessLatenessMs": 197,
        "maxTimestampRegressionMs": 100
      },
      "jitter": {
        "firstIssueAtMs": 20,
        "avgBufferedMs": 312,
        "maxBufferedMs": 320,
        "maxDepthFrames": 16
      },
      "decode": {
        "firstIssueAtMs": 200,
        "framesDecoded": 13,
        "concealmentFrames": 2,
        "concealmentTicks": 2
      },
      "pcmRing": {
        "firstIssueAtMs": null,
        "avgBufferedMs": 217.5693779904306,
        "minBufferedMs": 0,
        "maxBufferedMs": 220,
        "underruns": 0,
        "overruns": 0
      },
      "playout": {
        "firstIssueAtMs": 20,
        "avgDeltaMs": 21.818181818181817,
        "underTargetFraction": 0.021052631578947368,
        "outsideTargetFraction": 0.02210526315789474,
        "targetBufferMs": 120
      },
      "perf": {
        "tickBudgetBreachCount": 180,
        "tickBudgetBreachP95Ms": 40,
        "tickBudgetBreachMaxMs": 40,
        "longTaskCount": 0
      }
    },
    "stateTransitions": [
      {
        "state": "missingMedia",
        "count": 4
      },
      {
        "state": "coldStart",
        "count": 4
      },
      {
        "state": "steady",
        "count": 1037
      }
    ],
    "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": 0.021052631578947368,
          "threshold": 0.35,
          "operator": "<=",
          "passed": true,
          "description": "Under-target fraction ≤ 0.35 (provisional jitter pass)"
        },
        {
          "metric": "playoutOutsideTargetFraction",
          "observed": 0.02210526315789474,
          "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: 180 breaches, P95=40.0ms",
        "Transport triad: bridgeHW=24, binaryHW=18"
      ]
    }
  },
  "peerB": {
    "addr": "peer-B",
    "role": "standby-forwarder",
    "senderProfileId": "philKennyStaleSender",
    "senderProfileLabel": "Phil-Kenny stale-timestamp sender",
    "impairmentSummary": "Derived from the real phil-kenny capture: sender timestamps drift stale/regressing while the opposite side remains under playout pressure.",
    "metrics": {
      "avgPcmBufferedMs": 103.98652849740932,
      "avgPlayoutDeltaMs": -16.013471502590676,
      "playoutUnderTargetFraction": 0.15699481865284973,
      "playoutOutsideTargetFraction": 0.1648445595854922,
      "playoutRateFractionBelow1": 0,
      "jitterUnderruns": 0,
      "missingFrames": 1,
      "concealmentTicks": 1,
      "packetsDroppedStaleTimestamp": 202,
      "packetsDroppedStaleTimestampRatePerSec": 6.532988357050453,
      "packetsDroppedPendingDecrypt": 0,
      "packetsDroppedPendingDecryptRatePerSec": 0,
      "pendingDecryptDepthHighWater": 0,
      "reticulumAudioBridgeQueuedFramesHighWater": 0,
      "reticulumAudioBinaryOutQueueDepthHighWater": 0,
      "reticulumAudioBridgeWaitingForDrain": false,
      "reticulumAudioQueuePressureDrops": 0,
      "reticulumAudioStaleDrops": 0,
      "avgOpusBufferedMs": 315.2005174644243,
      "maxOpusBufferedMs": 320,
      "adaptiveTargetMedianMs": 120,
      "wasmFecDeferredPcmTicks": 0,
      "durationMs": 30920,
      "adaptiveNetworkMode": "steady",
      "playoutStarvationWorstSeverity": "none",
      "gcallAudioStage5BoostCumulativeMs": 0,
      "tickBudgetBreachCount": 0,
      "tickBudgetBreachP95Ms": 0,
      "tickBudgetBreachMaxMs": 0,
      "longTaskCount": 0,
      "role": "standby-forwarder",
      "v2ManagedSourceCount": 1,
      "legacyWindowOpusMetricsMeaningful": false,
      "avgPcmRingBufferedMs": 218.6934023285899,
      "avgTargetBufferMs": 120
    },
    "timeline": {
      "firstIssueAtMs": 20,
      "firstIssueStage": "jitter",
      "arrival": {
        "firstIssueAtMs": 1595,
        "totalPackets": 1544,
        "deliveredPackets": 1329,
        "droppedPackets": 215,
        "dropRate": 0.13924870466321243,
        "staleTimestampDrops": 202,
        "maxExcessLatenessMs": 5998,
        "maxTimestampRegressionMs": 4980
      },
      "jitter": {
        "firstIssueAtMs": 20,
        "avgBufferedMs": 315.2005174644243,
        "maxBufferedMs": 320,
        "maxDepthFrames": 16
      },
      "decode": {
        "firstIssueAtMs": 160,
        "framesDecoded": 15,
        "concealmentFrames": 1,
        "concealmentTicks": 1
      },
      "pcmRing": {
        "firstIssueAtMs": null,
        "avgBufferedMs": 218.6934023285899,
        "minBufferedMs": 0,
        "maxBufferedMs": 220,
        "underruns": 0,
        "overruns": 0
      },
      "playout": {
        "firstIssueAtMs": 20,
        "avgDeltaMs": 22.804657179818886,
        "underTargetFraction": 0.15699481865284973,
        "outsideTargetFraction": 0.1648445595854922,
        "targetBufferMs": 120
      },
      "perf": {
        "tickBudgetBreachCount": 0,
        "tickBudgetBreachP95Ms": 0,
        "tickBudgetBreachMaxMs": 0,
        "longTaskCount": 0
      }
    },
    "stateTransitions": [
      {
        "state": "missingMedia",
        "count": 3
      },
      {
        "state": "coldStart",
        "count": 3
      },
      {
        "state": "steady",
        "count": 1540
      }
    ],
    "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": 0.15699481865284973,
          "threshold": 0.35,
          "operator": "<=",
          "passed": true,
          "description": "Under-target fraction ≤ 0.35 (provisional jitter pass)"
        },
        {
          "metric": "playoutOutsideTargetFraction",
          "observed": 0.1648445595854922,
          "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",
        "Stale timestamp drops: 202 (6.53/s); inspect sourceTimestampLateness gating before playout policy tuning"
      ]
    }
  }
}