{
  "schema": "bounded-engine-phase6-acceptance-v1",
  "recorded_utc": "2026-10-29T14:30:53+00:00",
  "purpose": "Public-card correction after read-only review of the original screen and later separate evidence; no new measurement.",
  "historical_screen": {
    "evidence": "/evidence/bounded-engine-20261029-phase6.json",
    "evidence_sha256": "17731c0844e7b91ba0b256d4698ed6296daf318ef3a79cfb3258cdac789fa29d",
    "original_public_status": "Correct \u00b7 R4 not promoted",
    "original_public_detail": "Two-source broadcast join and grouped reducers:7/7 exact outputs on four loopback workers. Four reducers used3.70% less time, missing the preset5% benefit gate. One reducer is the default.",
    "measured_source_commit": "f85d1f15d241821bb522d35c077db993cee4f5c2",
    "comparison": "Explicit R4 / explicit R1 using the same measured Cast executable, P8, four loopback workers with four pool threads each.",
    "measured_cast_sha256": "ba5f21490aaf2409f7745ded78ce673323f4bfb9ce7bb5ee12678fd6445b9504",
    "prior_cast_sha256_not_the_timing_denominator": "95cba65628b85830f8e52505dc761567b566edf6ce4b86265b35bd21747a6d0a",
    "subsequent_final_policy_cast_sha256": "801c1900120c01e9de42c74f5c7e0ccb2250141d311c25b6542942a6a529c081",
    "workload": {
      "left_rows": 131072,
      "right_rows": 1024,
      "integer_groups": 32768,
      "left_parts": 8,
      "workers": 4,
      "pool_threads_per_worker": 4
    },
    "commands_exact": 7,
    "timed_commands": 4,
    "statistic": "median of two within-pair R4/R1 full-command wall ratios",
    "pairs": [
      {
        "round": 1,
        "r1_full_command_ms": 390.1616670000001,
        "r4_full_command_ms": 371.69208300000014,
        "ratio_r4_over_r1": 0.9526617154831873,
        "latency_change_percent": -4.733828451681266
      },
      {
        "round": 2,
        "r1_full_command_ms": 387.45504100000016,
        "r4_full_command_ms": 377.1627500000001,
        "ratio_r4_over_r1": 0.9734361670106646,
        "latency_change_percent": -2.65638329893354
      }
    ],
    "median_pair_ratio": 0.963048941246926,
    "latency_change_percent": -3.695105875307403,
    "frozen_benefit_limit_ratio": 0.95,
    "frozen_nonregression_limit_ratio": 1.05,
    "frozen_speed_benefit_pass": false,
    "frozen_r4_speed_promotion": false,
    "frozen_nonregression_pass": true,
    "original_decision_preserved": "The full original decision, including its explicit R1 recommendation, remains unchanged in the historical evidence and card dataset.",
    "inference": "Four timing calls/two fixed pairs, descriptive only; no statistical significance, universal speed, Photon or multihost claim."
  },
  "workload_scoped_adoption": {
    "decision": "kept-by-explicit-user-direction",
    "authority": "Current user direction explicitly accepts and retains the original measured 3.70% time benefit for this workload.",
    "accepted_explicit_reducers": 4,
    "scope": "The original two-source broadcast-join/grouped integer fixture on four loopback workers; this accepts the observed local result.",
    "frozen_5_percent_verdict_changed": false,
    "global_automatic_reducer_ceiling": 1,
    "global_default_changed": false,
    "engine_source_or_active_binary_changed_by_this_correction": false,
    "interpretation": "A separate adoption decision, not a retrospective gate pass or a restoration of the old measured executable."
  },
  "later_evidence_reconciliation": {
    "rule": "Keep study identities and observations separate. Do not substitute, pool or compound later results with the original 3.70% result.",
    "startup_readiness": {
      "dossier": "bench/results/etl_journey/cast_readiness_20261029/",
      "change": "Listener binds before worker spawn; a later executable and separate screen.",
      "baseline_cast_sha256": "801c1900120c01e9de42c74f5c7e0ccb2250141d311c25b6542942a6a529c081",
      "accepted_cast_sha256": "5aae14610d2f7e2b1797645ea439bc892bf6ffcbbdf42210a2bb66901eca95d2",
      "commands_exact": 16,
      "timed_commands": 12,
      "updated_r4_over_previous_r4_ratio": 0.15449285509402613,
      "updated_r4_over_updated_r1_ratio": 0.823780296945821,
      "updated_r4_over_updated_r1_latency_change_percent": -17.6219703054179,
      "frozen_keep_gates_pass": true,
      "frozen_r4_workload_gates_pass": true,
      "automatic_reducer_ceiling": 1,
      "inference": "Two fixed pairs per comparison; external full-command time includes startup and cleanup, not an isolated reducer-kernel speedup."
    },
    "dense_reducer_sweep": {
      "dossier": "bench/results/etl_journey/cast_reducer_dense_20261029/",
      "accepted_source_commit": "afee1d4dc35cae29f423c6b368f8b61d65d1d9c9",
      "reused_cast_sha256": "5aae14610d2f7e2b1797645ea439bc892bf6ffcbbdf42210a2bb66901eca95d2",
      "commands_exact": 44,
      "timed_commands": 42,
      "timed_samples_per_setting": 3,
      "reducers_tested": [
        2,
        3,
        4,
        5,
        6,
        7,
        8
      ],
      "paired_reference_reducers": 2,
      "panels": [
        {
          "parts": 8,
          "best_observed_setting": "p8-r4",
          "best_observed_reducers": 4,
          "best_median_ms": 58.192291000000004,
          "knee_setting": "p8-r3",
          "knee_reducers": 3,
          "within_5_percent_settings": [
            "p8-r3",
            "p8-r4",
            "p8-r6",
            "p8-r8"
          ]
        },
        {
          "parts": 16,
          "best_observed_setting": "p16-r4",
          "best_observed_reducers": 4,
          "best_median_ms": 59.80270900000018,
          "knee_setting": "p16-r4",
          "knee_reducers": 4,
          "within_5_percent_settings": [
            "p16-r4"
          ]
        }
      ],
      "interpretation": "R4 has the lowest observed median in both panels; P8/R3 is nearly tied. The paired reference is R2, not R1. This is a workload-specific curve, not a unique or global optimum; default remains one. Earlier wide-sweep observations remain separate."
    },
    "fetch_reuse_validation_C": {
      "dossier": "bench/results/etl_journey/cast_fetch_reuse_validation_20261029/",
      "binaries_sha256": {
        "baseline": "5aae14610d2f7e2b1797645ea439bc892bf6ffcbbdf42210a2bb66901eca95d2",
        "candidate": "2acb44b6fad9023c51588d979dd312130b75f224620a74527fe2694851b1add1"
      },
      "candidate_source_snapshot": "bench/results/etl_journey/cast_fetch_reuse_20261029/candidate/source/",
      "comparison": "Candidate / baseline at P16/R8; control P8/R1. This is not an R4/R1 reducer comparison.",
      "commands_exact": 36,
      "timed_commands": 32,
      "paired_rounds_per_case": 8,
      "target_wall_ratio": 0.9656458385976954,
      "target_wall_change_percent": -3.435416140230463,
      "target_summed_cpu_change_percent": -13.163222088277681,
      "target_process_peak_rss_ratio": 0.9804263288758583,
      "control_wall_ratio": 0.9961350209583346,
      "original_5_percent_benefit_gate_pass": false,
      "adoption": "kept-by-explicit-user-direction",
      "earlier_failed_screens": [
        {
          "dossier": "bench/results/etl_journey/cast_fetch_budget_20261029/",
          "verdict": "not-promoted; target normal-path wall nonregression guard missed"
        },
        {
          "dossier": "bench/results/etl_journey/cast_fetch_reuse_20261029/",
          "verdict": "not-promoted; target wall benefit gate missed; same candidate binary later used in C"
        }
      ],
      "preservation": "A/B remain not-promoted; never pooled or replaced."
    }
  },
  "prospective_speed_policy": {
    "effective_date": "2026-10-29",
    "authority": "Explicit user direction: 1% speed gate for stacking micro wins",
    "applies_to": "New experiment plans; do not rewrite historical plans or results",
    "primary_clock": "external_full_command",
    "statistic": "median_of_same_round_candidate_baseline_ratios",
    "minimum_improvement_percent": 1.0,
    "maximum_candidate_baseline_ratio": 0.99,
    "controls": {
      "maximum_wall_ratio": 1.05,
      "maximum_process_peak_rss_ratio": 1.05,
      "exact_output_required": true,
      "required_recovery_and_lifecycle_checks": true
    },
    "historical_gates_rewritten": false,
    "sample_reporting": "Freeze new plans before execution; retain every observation and show sample counts and spread. A 1% observed benefit is not statistical significance."
  },
  "source_manifest": {
    "root": "Private neon-cpp evidence; paths below are relative to that root, not public download URLs.",
    "sha256": {
      "bench/results/etl_journey/bounded_engine_20261029/versions.json": "45126e5e15b3806859e6b571e9a3ae14c98fd6dde6a7b23c78a870814c677116",
      "bench/results/etl_journey/bounded_engine_20261029/phase6/plan.json": "955c238348f00018dfc9d57a480446cb0e88189bdd5bb9dc98419c8c61ca8081",
      "bench/results/etl_journey/bounded_engine_20261029/phase6/summary.json": "6903d9319ab68fe8c200ede439c37eeefc1f7a016bc642ea0a18ebf495322ce6",
      "bench/results/etl_journey/bounded_engine_20261029/phase6/decision.json": "1a3232a9d00590b2a073a98506f808f5053637bb63bb2b35f7aab1711f180acd",
      "bench/results/etl_journey/bounded_engine_20261029/phase6/archive-audit.json": "b53b6bb468cd6426fc6bb9f85331a5065dcbe8e788e512e8fb0a0b2d8d8441a6",
      "bench/results/etl_journey/cast_readiness_20261029/decision.json": "52341d07a04548eefad96ef6c70266ce9a30998d44a5777ae59b63feeacd43c7",
      "bench/results/etl_journey/cast_readiness_20261029/summary.json": "f49dcc21926357f573783f8b06e35240ceaa5553d45b0803a7999d29976ab0a3",
      "bench/results/etl_journey/cast_reducer_dense_20261029/source-identity-before.json": "12cd60ccd92655fae53628deadd6f45a8d0c8897347eebb1acb8734f46493bfd",
      "bench/results/etl_journey/cast_reducer_dense_20261029/summary.json": "48927775c611689f56402042859e4be9e39406f6f368dc72e73e2472f254d20f",
      "bench/results/etl_journey/cast_fetch_reuse_validation_20261029/binding.json": "cba0cd133e974bb96a53fa4102ac679325e14c4e7fa5fe46976531b5640e9b78",
      "bench/results/etl_journey/cast_fetch_reuse_validation_20261029/decision.json": "2391ccd66c25790eadb0d8b00e0d4cf4110a7404e3fc9140abb05762cf1983d8",
      "bench/results/etl_journey/cast_fetch_reuse_validation_20261029/summary.json": "e1b5523d05c1eed025a4954970f8f0270a73be718ba6529c24ff7bc35d3cc082",
      "bench/results/etl_journey/cast_fetch_budget_20261029/decision.json": "32eecaeb0e7cd1f7363c1689c89718f313676ae7b0ef827e46406d444b55d46b",
      "bench/results/etl_journey/cast_fetch_reuse_20261029/decision.json": "228641c73d1ca5d477da645ecd4a8c4f1c77a93b446110ea79cd7035083eac51",
      "docs/PERFORMANCE_GATES.md": "25e0282e6b39598ba0bf9d1b389fd6e0d3c9e61cbf311d15809762d0678f2dd5",
      "bench/performance_policy.json": "6fdfc33b928814b5eadd47aa80a2c1b99ca112eaf91ba3585ff10ab0a2f1a859"
    }
  },
  "publication_scope": {
    "historical_public_evidence_changed": false,
    "raw_observations_and_version_identities_preserved": true,
    "new_benchmarks_or_native_tests_or_website_builds": 0,
    "deployments": 0,
    "github_actions": {
      "repository": "MassiveNoobie/n0is",
      "enabled": false,
      "verified_via": "Read-only GET /repos/MassiveNoobie/n0is/actions/permissions"
    },
    "limits": "Small local descriptive studies; process peak RSS is not aggregate cluster RSS. No Photon, foreign-language superiority, multi-host, official TPC result or cumulative speedup follows."
  }
}