{
  "mode": "offline-synthetic-callback-contract",
  "baseline_commit": "17fa46f76267da428f96f4ca4240a9a07de14b9a",
  "candidate": "working tree at invocation; published with its source commit",
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    "src/apixly_jev_harness/diagnostics.py": "24950b4d834d9e6c902996c7bcddfa208944e42300ae062e9ebc2a44f75a091f",
    "src/apixly_jev_harness/engine.py": "cf96bb79196985fee59262f8022162b175ec0d0f65136d219cf79360feebed63",
    "src/apixly_jev_harness/surfaces.py": "65ce73edfe9f6a3c16de373b3a1b85671c3d2cc661f3a50dd906a15721c7d8f1",
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    "src/apixly_jev_harness/task_cli.py": "a798ff6850585902f6520e82b979964e404134dd5388eb58401db0d201fd3bbf",
    "src/apixly_jev_harness/verify.py": "97d2a178902291094f4e16db08732748d234b8c5ad8dd49a55607c8d195f1ed2"
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    "src/apixly_jev_harness/callbacks.py": "2d27ad4540d910354c54de7566546b4c9d99b5a5fa87705a1905885349078497",
    "src/apixly_jev_harness/cli.py": "8d9434bf8a8b539163194a84e3f099761d08ef32201f99cbce46c139f3726d94",
    "src/apixly_jev_harness/context.py": "e0deafa0addd0f96b422a497dae8176d059dd36635954d6770c0cf61ba8c3593",
    "src/apixly_jev_harness/diagnostics.py": "24950b4d834d9e6c902996c7bcddfa208944e42300ae062e9ebc2a44f75a091f",
    "src/apixly_jev_harness/engine.py": "cdedf1ef3a769cc1557dfa63cf6b6e6c4b48a14eb7b0fc12d3d9a957a53b3be2",
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    "src/apixly_jev_harness/task.py": "0f5801e9fdb5626e1db65d269c715e8bcf692ebaa3a91f46b9945158b4bbb6db",
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    "src/apixly_jev_harness/verify.py": "97d2a178902291094f4e16db08732748d234b8c5ad8dd49a55607c8d195f1ed2"
  },
  "runner_sha256": "508ab671a820c448f82d5efd98a12328c3fe69423f0e9570dcb75abfadeba804",
  "python_version": "3.14.2",
  "cases": {
    "task_async_observe": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "observe",
        "kind": "coroutine"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "task_async_verify": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "verify",
        "kind": "coroutine"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "task_async_authorize": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "authorize",
        "kind": "coroutine"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "tool_coroutine": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "execute",
        "kind": "coroutine"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "tool_generator": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "execute",
        "kind": "generator"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "tool_async_generator": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "execute",
        "kind": "async_generator"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "metadata_async_available": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "available",
        "kind": "coroutine"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "metadata_async_result_context": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "result_context",
        "kind": "coroutine"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "provider_coroutine": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "choices",
        "kind": "coroutine"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "provider_generator": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "choices",
        "kind": "generator"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "provider_async_generator": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "choices",
        "kind": "async_generator"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "partial_provider_coroutine": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "choices",
        "kind": "coroutine"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "partial_provider_generator": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "choices",
        "kind": "generator"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "partial_provider_async_generator": {
      "status": "rejected",
      "contract_error": {
        "code": "synchronous_callback_required",
        "callback": "choices",
        "kind": "async_generator"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "provider_required_keyword": {
      "status": "rejected",
      "contract_error": {
        "code": "provider_signature_unsupported",
        "callback": "choices"
      },
      "admission_body_invocations": 0,
      "body_invocations": 0,
      "effects": 0
    },
    "provider_two_arguments": {
      "status": "bound",
      "value": "synthetic",
      "provider_calls": 2,
      "admission_body_invocations": 0,
      "effects": 1
    },
    "provider_three_arguments": {
      "status": "bound",
      "value": "A-child",
      "provider_calls": 1,
      "admission_body_invocations": 0,
      "effects": 1
    },
    "provider_three_optional_keyword": {
      "status": "bound",
      "value": "A-child",
      "provider_calls": 1,
      "admission_body_invocations": 0,
      "effects": 1
    },
    "provider_callable_with_lock": {
      "status": "bound",
      "value": "synthetic",
      "provider_calls": 2,
      "provider_identity_preserved": true,
      "admission_body_invocations": 0,
      "effects": 1
    },
    "provider_partial_with_lock": {
      "status": "bound",
      "value": "synthetic",
      "provider_calls": 2,
      "provider_identity_preserved": true,
      "admission_body_invocations": 0,
      "effects": 1
    },
    "static_snapshot": {
      "status": "bound",
      "value": {
        "value": "original"
      },
      "admission_body_invocations": 0,
      "effects": 1
    },
    "workflow_generator_candidates": {
      "status": "done",
      "admission_body_invocations": 0,
      "effects": 1,
      "scripted_decisions": 1
    },
    "sync_wraps_async_bridge": {
      "status": "observed",
      "value": {},
      "admission_body_invocations": 0,
      "effects": 0
    },
    "ambiguous_provider_prefers_three": {
      "status": "bound",
      "value": "A",
      "provider_calls": 1,
      "admission_body_invocations": 0,
      "effects": 1
    }
  },
  "reproduction": "python benchmarks/callback_contract.py --output local-results/callback-contract-ab.json",
  "scope": "Twenty-four fixed synthetic fixtures, three paired repeats with alternating arm order. Deferred baseline callbacks are only constructed/registered, never invoked or materialized. Positive fixtures bind singleton values and one generator Workflow runs a scripted decision. Native inference entrypoints are forbidden in each worker; actual model/UI/network calls are zero. This measures Python callback admission and provider binding, not semantic accuracy, async execution or a sandbox.",
  "negative_results": "Introspection and fixed contract metadata add local time/context overhead. Signature bindability does not prove callback return types or bound I/O. When both two and three positional arguments bind, three is preferred; optional/variadic providers previously called with two may now receive bound parents and need an explicit two-argument wrapper. Dynamic providers retain their callable identity and resource lifetime; static candidates retain a snapshot. No speed, accuracy or fee gain is claimed.",
  "cost_conversion": "Zero actual model calls; no tariff or savings assumed. Whole-operation timing includes callback fixture construction, admission, successful singleton binding/execution and one permitted private synthetic journal where applicable; excludes process/import/snapshot setup. Scripted telemetry is separated from actual model usage. Returned context bytes measure compact fixture results with runtime archive paths excluded.",
  "summary": {
    "baseline": {
      "runs": 72,
      "correct": 15,
      "statuses": {
        "accepted": 45,
        "bound": 12,
        "done": 3,
        "observed": 3,
        "rejected": 9
      },
      "admission_body_invocations": 0,
      "native_inference_attempts": 0,
      "scripted_decisions": 3,
      "median_whole_operation_seconds": 0.00016679200052749366,
      "returned_context_bytes": 12258,
      "scripted_decision_bytes": 4974,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      }
    },
    "candidate": {
      "runs": 72,
      "correct": 72,
      "statuses": {
        "bound": 21,
        "done": 3,
        "observed": 3,
        "rejected": 45
      },
      "admission_body_invocations": 0,
      "native_inference_attempts": 0,
      "scripted_decisions": 3,
      "median_whole_operation_seconds": 0.0001643959985813126,
      "returned_context_bytes": 18885,
      "scripted_decision_bytes": 4973,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      }
    }
  },
  "rows": [
    {
      "case": "task_async_observe",
      "runtime_version": "0.1.5",
      "runtime_loaded_from_requested_source": true,
      "expected": {
        "status": "rejected",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "observe",
          "kind": "coroutine"
        },
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "effects": 0
      },
      "result": {
        "status": "accepted",
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "provider_calls": 0,
        "effects": 0,
        "native_attempts": 0,
        "scripted_decisions": 0
      },
      "correct": false,
      "whole_operation_seconds": 0.00014400000509340316,
      "returned_context_bytes": 160,
      "scripted_decision_bytes": 0,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      },
      "arm": "baseline",
      "repeat": 1
    },
    {
      "case": "task_async_observe",
      "runtime_version": "0.1.6",
      "runtime_loaded_from_requested_source": true,
      "expected": {
        "status": "rejected",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "observe",
          "kind": "coroutine"
        },
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "effects": 0
      },
      "result": {
        "status": "rejected",
        "admission_body_invocations": 0,
        "error_type": "CallbackContractError",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "observe",
          "kind": "coroutine"
        },
        "body_invocations": 0,
        "provider_calls": 0,
        "effects": 0,
        "native_attempts": 0,
        "scripted_decisions": 0
      },
      "correct": true,
      "whole_operation_seconds": 0.00017433300672564656,
      "returned_context_bytes": 304,
      "scripted_decision_bytes": 0,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      },
      "arm": "candidate",
      "repeat": 1
    },
    {
      "case": "task_async_observe",
      "runtime_version": "0.1.6",
      "runtime_loaded_from_requested_source": true,
      "expected": {
        "status": "rejected",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "observe",
          "kind": "coroutine"
        },
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "effects": 0
      },
      "result": {
        "status": "rejected",
        "admission_body_invocations": 0,
        "error_type": "CallbackContractError",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "observe",
          "kind": "coroutine"
        },
        "body_invocations": 0,
        "provider_calls": 0,
        "effects": 0,
        "native_attempts": 0,
        "scripted_decisions": 0
      },
      "correct": true,
      "whole_operation_seconds": 0.00014633400132879615,
      "returned_context_bytes": 304,
      "scripted_decision_bytes": 0,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      },
      "arm": "candidate",
      "repeat": 2
    },
    {
      "case": "task_async_observe",
      "runtime_version": "0.1.5",
      "runtime_loaded_from_requested_source": true,
      "expected": {
        "status": "rejected",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "observe",
          "kind": "coroutine"
        },
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "effects": 0
      },
      "result": {
        "status": "accepted",
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "provider_calls": 0,
        "effects": 0,
        "native_attempts": 0,
        "scripted_decisions": 0
      },
      "correct": false,
      "whole_operation_seconds": 0.00013366701023187488,
      "returned_context_bytes": 160,
      "scripted_decision_bytes": 0,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      },
      "arm": "baseline",
      "repeat": 2
    },
    {
      "case": "task_async_observe",
      "runtime_version": "0.1.5",
      "runtime_loaded_from_requested_source": true,
      "expected": {
        "status": "rejected",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "observe",
          "kind": "coroutine"
        },
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "effects": 0
      },
      "result": {
        "status": "accepted",
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "provider_calls": 0,
        "effects": 0,
        "native_attempts": 0,
        "scripted_decisions": 0
      },
      "correct": false,
      "whole_operation_seconds": 0.0001413749996572733,
      "returned_context_bytes": 160,
      "scripted_decision_bytes": 0,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      },
      "arm": "baseline",
      "repeat": 3
    },
    {
      "case": "task_async_observe",
      "runtime_version": "0.1.6",
      "runtime_loaded_from_requested_source": true,
      "expected": {
        "status": "rejected",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "observe",
          "kind": "coroutine"
        },
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "effects": 0
      },
      "result": {
        "status": "rejected",
        "admission_body_invocations": 0,
        "error_type": "CallbackContractError",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "observe",
          "kind": "coroutine"
        },
        "body_invocations": 0,
        "provider_calls": 0,
        "effects": 0,
        "native_attempts": 0,
        "scripted_decisions": 0
      },
      "correct": true,
      "whole_operation_seconds": 0.00014375000318977982,
      "returned_context_bytes": 304,
      "scripted_decision_bytes": 0,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      },
      "arm": "candidate",
      "repeat": 3
    },
    {
      "case": "task_async_verify",
      "runtime_version": "0.1.5",
      "runtime_loaded_from_requested_source": true,
      "expected": {
        "status": "rejected",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "verify",
          "kind": "coroutine"
        },
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "effects": 0
      },
      "result": {
        "status": "accepted",
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "provider_calls": 0,
        "effects": 0,
        "native_attempts": 0,
        "scripted_decisions": 0
      },
      "correct": false,
      "whole_operation_seconds": 0.0001455409947084263,
      "returned_context_bytes": 160,
      "scripted_decision_bytes": 0,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      },
      "arm": "baseline",
      "repeat": 1
    },
    {
      "case": "task_async_verify",
      "runtime_version": "0.1.6",
      "runtime_loaded_from_requested_source": true,
      "expected": {
        "status": "rejected",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "verify",
          "kind": "coroutine"
        },
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "effects": 0
      },
      "result": {
        "status": "rejected",
        "admission_body_invocations": 0,
        "error_type": "CallbackContractError",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "verify",
          "kind": "coroutine"
        },
        "body_invocations": 0,
        "provider_calls": 0,
        "effects": 0,
        "native_attempts": 0,
        "scripted_decisions": 0
      },
      "correct": true,
      "whole_operation_seconds": 0.0001560829987283796,
      "returned_context_bytes": 303,
      "scripted_decision_bytes": 0,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      },
      "arm": "candidate",
      "repeat": 1
    },
    {
      "case": "task_async_verify",
      "runtime_version": "0.1.6",
      "runtime_loaded_from_requested_source": true,
      "expected": {
        "status": "rejected",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "verify",
          "kind": "coroutine"
        },
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "effects": 0
      },
      "result": {
        "status": "rejected",
        "admission_body_invocations": 0,
        "error_type": "CallbackContractError",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "verify",
          "kind": "coroutine"
        },
        "body_invocations": 0,
        "provider_calls": 0,
        "effects": 0,
        "native_attempts": 0,
        "scripted_decisions": 0
      },
      "correct": true,
      "whole_operation_seconds": 0.00015449999773409218,
      "returned_context_bytes": 303,
      "scripted_decision_bytes": 0,
      "actual_model_usage": {
        "requests": 0,
        "models": {},
        "input_tokens": 0,
        "output_tokens": 0
      },
      "arm": "candidate",
      "repeat": 2
    },
    {
      "case": "task_async_verify",
      "runtime_version": "0.1.5",
      "runtime_loaded_from_requested_source": true,
      "expected": {
        "status": "rejected",
        "contract_error": {
          "code": "synchronous_callback_required",
          "callback": "verify",
          "kind": "coroutine"
        },
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "effects": 0
      },
      "result": {
        "status": "accepted",
        "admission_body_invocations": 0,
        "body_invocations": 0,
        "provider_calls": 0,
        "effects": 0,
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  ]
}