{
  "schemaVersion": "ucr.handoff-effectiveness/1",
  "evidenceClass": "executable-smoke",
  "executedAt": "2026-08-09T23:39:26.033Z",
  "benchmarkHash": "597b75c9fb2a20a171bdde67c7a40cc5aef9aa27ee730550a747c750a39243d2",
  "registration": {
    "schemaVersion": "ucr.benchmark-registration/1",
    "benchmarkHash": "597b75c9fb2a20a171bdde67c7a40cc5aef9aa27ee730550a747c750a39243d2",
    "primaryOutcomes": [
      "correct",
      "severeHarm",
      "mistakeExecuted"
    ],
    "exclusions": [
      "runner infrastructure failure before model invocation",
      "missing deterministic grader receipt"
    ],
    "arms": [
      "empty",
      "runtime",
      "oracle",
      "stale",
      "irrelevant",
      "contradictory",
      "harmful"
    ],
    "powerAnalysis": {
      "baselineRate": 0.6,
      "treatmentRate": 0.7,
      "minimumEffect": 0.1,
      "alpha": 0.05,
      "power": 0.8,
      "perArm": 357,
      "method": "normal-approximation-two-sided-two-proportion"
    },
    "hiddenGraders": true,
    "naturalTaskFixtures": 11,
    "registrationHash": "e171d5da8431aa64f847b8bd5452b7f40facdb4330d0c21d6b6e38d89b486549"
  },
  "directions": [
    "codex->claude-code",
    "claude-code->codex"
  ],
  "pairsPerDirection": 1,
  "requiredPerArm": 357,
  "poweredDesign": false,
  "poweredCompleted": false,
  "plannedInvocations": 6,
  "completedByDirection": {
    "codex->claude-code": 1,
    "claude-code->codex": 0
  },
  "attempts": 2,
  "attemptsPassed": 1,
  "ledger": {
    "schemaVersion": "ucr.evidence-ledger/2",
    "evidenceClass": "executable-smoke",
    "run": {
      "schemaVersion": "ucr.evidence-run/2",
      "runId": "handoff-effectiveness-7a46658a46c74890",
      "evidenceClass": "executable-smoke",
      "benchmarkHash": "597b75c9fb2a20a171bdde67c7a40cc5aef9aa27ee730550a747c750a39243d2",
      "sourceTreeHash": "5c04a2dedcd24b4d9f03ef71621c3e3c8daa7f0667bcea2f4faa6ea688bb3021",
      "runner": {
        "name": "ucr-handoff-effectiveness",
        "registrationHash": "e171d5da8431aa64f847b8bd5452b7f40facdb4330d0c21d6b6e38d89b486549",
        "plannedInvocations": 6
      },
      "startedAt": "2026-08-09T23:39:26.026Z",
      "runHash": "483c79b4d4f25fe527b571d3b6dd3388f5089b1bd9a524ef7cd9b49a989f5f44"
    },
    "rows": [
      {
        "study": "cross-client-handoff",
        "pairId": "codex->claude-code:0:df81ab292dd0c6390139931e17e896be78beacd9e8114276cde6ded97e4c5efc",
        "taskId": "df81ab292dd0c6390139931e17e896be78beacd9e8114276cde6ded97e4c5efc",
        "producerClient": "codex",
        "consumerClient": "claude-code",
        "producerFamily": "openai",
        "consumerFamily": "anthropic",
        "producerModel": "gpt-5.6-sol",
        "consumerModel": "sonnet",
        "severeHarm": false,
        "quarantinedBeforeNext": true,
        "arm": "empty",
        "correct": false,
        "mistakeExecuted": false,
        "delivered": false,
        "eligible": false,
        "selected": false,
        "applicable": null,
        "inputTokens": 2,
        "outputTokens": 20,
        "studySequence": null,
        "schemaVersion": "ucr.evidence-row/2",
        "runId": "handoff-effectiveness-7a46658a46c74890",
        "sequence": 0,
        "previousHash": "483c79b4d4f25fe527b571d3b6dd3388f5089b1bd9a524ef7cd9b49a989f5f44",
        "rowHash": "94aab01ec1324e13ba0b977f2e8b8b44da7e7fb7b2ce284cbeb2a6ce19b0515e"
      },
      {
        "study": "cross-client-handoff",
        "pairId": "codex->claude-code:0:df81ab292dd0c6390139931e17e896be78beacd9e8114276cde6ded97e4c5efc",
        "taskId": "df81ab292dd0c6390139931e17e896be78beacd9e8114276cde6ded97e4c5efc",
        "producerClient": "codex",
        "consumerClient": "claude-code",
        "producerFamily": "openai",
        "consumerFamily": "anthropic",
        "producerModel": "gpt-5.6-sol",
        "consumerModel": "sonnet",
        "severeHarm": false,
        "quarantinedBeforeNext": true,
        "arm": "runtime",
        "correct": true,
        "mistakeExecuted": false,
        "delivered": true,
        "deliveryPhase": "pre-action",
        "eligible": true,
        "selected": true,
        "applicable": true,
        "stale": false,
        "contextOverheadRatio": 0.5,
        "inputTokens": 2,
        "outputTokens": 31,
        "studySequence": null,
        "schemaVersion": "ucr.evidence-row/2",
        "runId": "handoff-effectiveness-7a46658a46c74890",
        "sequence": 1,
        "previousHash": "94aab01ec1324e13ba0b977f2e8b8b44da7e7fb7b2ce284cbeb2a6ce19b0515e",
        "rowHash": "2dfcfd03096e2807a143b377cad4f7b4e61b83d2a629fa93d8d9ec76833d5175"
      },
      {
        "study": "cross-client-handoff",
        "pairId": "claude-code->codex:0:f5b31303c548dfd56c2071ee32e9ae60350a781fc360cabf5f5be106f5e8a1fe",
        "taskId": "f5b31303c548dfd56c2071ee32e9ae60350a781fc360cabf5f5be106f5e8a1fe",
        "producerClient": "claude-code",
        "consumerClient": "codex",
        "producerFamily": "anthropic",
        "consumerFamily": "openai",
        "producerModel": "sonnet",
        "consumerModel": "gpt-5.6-sol",
        "severeHarm": false,
        "quarantinedBeforeNext": true,
        "arm": "empty",
        "correct": false,
        "mistakeExecuted": false,
        "delivered": false,
        "eligible": false,
        "selected": false,
        "applicable": null,
        "inputTokens": 13248,
        "outputTokens": 11,
        "studySequence": null,
        "schemaVersion": "ucr.evidence-row/2",
        "runId": "handoff-effectiveness-7a46658a46c74890",
        "sequence": 2,
        "previousHash": "2dfcfd03096e2807a143b377cad4f7b4e61b83d2a629fa93d8d9ec76833d5175",
        "rowHash": "db3ff36a7c9bd94c122392df699c255950f13e5aa4531521fc70e1fdac9b6f30"
      },
      {
        "study": "cross-client-handoff",
        "pairId": "claude-code->codex:0:f5b31303c548dfd56c2071ee32e9ae60350a781fc360cabf5f5be106f5e8a1fe",
        "taskId": "f5b31303c548dfd56c2071ee32e9ae60350a781fc360cabf5f5be106f5e8a1fe",
        "producerClient": "claude-code",
        "consumerClient": "codex",
        "producerFamily": "anthropic",
        "consumerFamily": "openai",
        "producerModel": "sonnet",
        "consumerModel": "gpt-5.6-sol",
        "severeHarm": false,
        "quarantinedBeforeNext": true,
        "arm": "runtime",
        "correct": false,
        "mistakeExecuted": false,
        "delivered": false,
        "deliveryPhase": "pre-action",
        "eligible": true,
        "selected": false,
        "applicable": true,
        "stale": false,
        "contextOverheadRatio": 2.082736254619504,
        "inputTokens": 40668,
        "outputTokens": 206,
        "studySequence": null,
        "schemaVersion": "ucr.evidence-row/2",
        "runId": "handoff-effectiveness-7a46658a46c74890",
        "sequence": 3,
        "previousHash": "db3ff36a7c9bd94c122392df699c255950f13e5aa4531521fc70e1fdac9b6f30",
        "rowHash": "5f0ec67031c91d5a80edd6fb8e86112002d8d9fcb7ba9795de06cc212cf20745"
      }
    ],
    "rowCount": 4,
    "chainHead": "5f0ec67031c91d5a80edd6fb8e86112002d8d9fcb7ba9795de06cc212cf20745",
    "transcriptsPublished": false,
    "endedAt": "2026-08-09T23:39:26.028Z",
    "ledgerHash": "ceac3e14739ed4b580f725befd832b9b3bce66718f451a1096cbcf7f6db77711",
    "signature": "4wnXj82bC9HOEFNCtBK25sGvDYi6zcRHb3icOPH3td9OPbFjgZabNDa69TOWdFsJXhu4NbIzLxAukDJJJgnBBQ=="
  },
  "ledgerPublicKey": "-----BEGIN PUBLIC KEY-----\nMCowBQYDK2VwAyEAy9wRx36jRUeChcx8QrQkuNJnjos+Ikb2ox01zuA7xw0=\n-----END PUBLIC KEY-----\n",
  "ledgerVerification": {
    "valid": true,
    "diagnostics": [],
    "validSignature": true,
    "ledgerHash": "ceac3e14739ed4b580f725befd832b9b3bce66718f451a1096cbcf7f6db77711",
    "rowCount": 4
  },
  "derived": {
    "schemaVersion": "ucr.derived-metrics/2",
    "metrics": {
      "applicabilityPrecision": null,
      "preActionDelivery": null,
      "irrelevantDelivery": null,
      "staleDelivery": null,
      "recurrenceReduction": null,
      "recurrenceIntervalLow": null,
      "naturalCorrectnessDelta": null,
      "severeUnquarantined": 0,
      "emptyP95Overhead": null,
      "reconstructionTokenReduction": null,
      "writerIntegrity": true,
      "crossClientPassed": false,
      "competitivePassed": false
    },
    "intervals": {
      "recurrence": {
        "pairs": 0,
        "mean": null,
        "low": null,
        "high": null
      },
      "correctness": {
        "pairs": 0,
        "mean": null,
        "low": null,
        "high": null
      },
      "reconstruction": {
        "pairs": 0,
        "mean": null,
        "low": null,
        "high": null
      }
    },
    "sources": {
      "applicabilityPrecision": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "preActionDelivery": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "irrelevantDelivery": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "staleDelivery": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "recurrenceReduction": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "recurrenceIntervalLow": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "naturalCorrectnessDelta": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "severeUnquarantined": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "emptyP95Overhead": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "reconstructionTokenReduction": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "writerIntegrity": {
        "requiredClass": "conformance",
        "eligibleLedgerHashes": [
          "ceac3e14739ed4b580f725befd832b9b3bce66718f451a1096cbcf7f6db77711"
        ]
      },
      "crossClientPassed": {
        "requiredClass": "effectiveness",
        "eligibleLedgerHashes": []
      },
      "competitivePassed": {
        "requiredClass": "superiority",
        "eligibleLedgerHashes": []
      }
    },
    "inputLedgerHashes": [
      "ceac3e14739ed4b580f725befd832b9b3bce66718f451a1096cbcf7f6db77711"
    ],
    "rejectedLedgers": 0,
    "derivedHash": "f5a374c43be9dd0f75ff16c493c3fc788cba7ec1148b678617135f9736a79cb3"
  },
  "verdict": {
    "status": "insufficient",
    "passed": false,
    "missing": [
      "applicabilityPrecision",
      "preActionDelivery",
      "irrelevantDelivery",
      "staleDelivery",
      "recurrenceReduction",
      "recurrenceIntervalLow",
      "naturalCorrectnessDelta",
      "emptyP95Overhead",
      "reconstructionTokenReduction"
    ],
    "failed": []
  },
  "passed": false,
  "limitations": [
    "pilot is below the preregistered 357 pairs per arm",
    "pilot rows remain executable-smoke and cannot supply effectiveness metrics",
    "superiority and production require separate evidence tiers"
  ],
  "reportHash": "0eb1e55e8abfc443245fedb6cea36feaf7ca296906fdef3e35f4bb27523ed6e7"
}
