{
  "benchmark": "H2 TEST2000",
  "n": 2000,
  "weights": "BF16 parent + checkpoint42831 adapter; pre-quantization",
  "features": {
    "lexdiv": {
      "human": 0.44899158253682175,
      "base": 0.4158458531026242,
      "expert": 0.44999183728938086,
      "historical_base": 0.4127069373936656,
      "historical_cone": 0.38800292698276473,
      "paired_delta": 0.03414598418675671,
      "paired95ci": [
        0.028984627249466995,
        0.038637008931309856
      ]
    },
    "lexdensity": {
      "human": 0.44336953235725207,
      "base": 0.45670213143953275,
      "expert": 0.433369614579625,
      "historical_base": 0.45355159115291144,
      "historical_cone": 0.44569783553637227,
      "paired_delta": -0.02333251685990781,
      "paired95ci": [
        -0.02622278779922698,
        -0.020518426100244007
      ]
    },
    "pct_long": {
      "human": 0.19021838478553185,
      "base": 0.24707889950463954,
      "expert": 0.1821357298909025,
      "historical_base": 0.24460927426372608,
      "historical_cone": 0.23024393721795905,
      "paired_delta": -0.06494316961373704,
      "paired95ci": [
        -0.0678355478258805,
        -0.061946992166030196
      ]
    },
    "entropy": {
      "human": 6.918216785489374,
      "base": 6.898383787069547,
      "expert": 6.317382813656346,
      "historical_base": 6.897676138511753,
      "historical_cone": 6.757419865804984,
      "paired_delta": -0.5810009734131996,
      "paired95ci": [
        -0.6056459439573577,
        -0.5595779027138188
      ]
    },
    "burstiness": {
      "human": 1.7166219880663958,
      "base": 2.057251991675612,
      "expert": 1.376956660025221,
      "historical_base": 2.1194940380409957,
      "historical_cone": 2.0435451885093436,
      "paired_delta": -0.6802953316503909,
      "paired95ci": [
        -0.70024346636305,
        -0.6588752304719451
      ]
    },
    "pct_vowels": {
      "human": 0.29663441035929405,
      "base": 0.3041152182182486,
      "expert": 0.3033233973177885,
      "historical_base": 0.30399907499760026,
      "historical_cone": 0.3027035217327655,
      "paired_delta": -0.0007918209004600809,
      "paired95ci": [
        -0.0014682615429397147,
        -2.214605971942154e-05
      ]
    },
    "pct_consonants": {
      "human": 0.47879499480625215,
      "base": 0.4903276550737023,
      "expert": 0.4850320953228257,
      "historical_base": 0.4891986978956337,
      "historical_cone": 0.48793290877553636,
      "paired_delta": -0.005295559750876576,
      "paired95ci": [
        -0.006208119166421207,
        -0.004418319643465491
      ]
    },
    "pct_punct": {
      "human": 0.036021427481950155,
      "base": 0.045666385444399014,
      "expert": 0.030516165332549847,
      "historical_base": 0.04683780704859862,
      "historical_cone": 0.043815765011107115,
      "paired_delta": -0.015150220111849163,
      "paired95ci": [
        -0.015941927909233808,
        -0.014338510947371007
      ]
    },
    "n_words": {
      "human": 733.3925,
      "base": 637.5175,
      "expert": 332.9965,
      "historical_base": 653.679,
      "historical_cone": 632.8035,
      "paired_delta": -304.521,
      "paired95ci": [
        -312.51651250000003,
        -295.99275
      ]
    },
    "n_sents": {
      "human": 34.128,
      "base": 30.4155,
      "expert": 17.444,
      "historical_base": 31.3525,
      "historical_cone": 31.757,
      "paired_delta": -12.9715,
      "paired95ci": [
        -13.55155,
        -12.39845
      ]
    },
    "mean_sent_len": {
      "human": 24.86668532029877,
      "base": 23.64437700612384,
      "expert": 28.077007539128974,
      "historical_base": 23.31581804509707,
      "historical_cone": 22.91044907099578,
      "paired_delta": 4.432630533005134,
      "paired95ci": [
        2.8423998561445893,
        6.2831279586983095
      ]
    },
    "parse_depth": {
      "human": 10.9595,
      "base": 10.3015,
      "expert": 9.7005,
      "historical_base": 10.2285,
      "historical_cone": 10.3255,
      "paired_delta": -0.601,
      "paired95ci": [
        -0.8065125,
        -0.36242500000000005
      ]
    },
    "fog": {
      "human": 12.98932660843822,
      "base": 15.375829512024142,
      "expert": 12.215177582054885,
      "historical_base": 15.219314251852479,
      "historical_cone": 14.486501705686242,
      "paired_delta": -3.160651929969258,
      "paired95ci": [
        -3.4392152667917077,
        -2.854815409701112
      ]
    },
    "linsear": {
      "human": 11.590718414224664,
      "base": 14.526123185002133,
      "expert": 11.012325868303094,
      "historical_base": 14.404184514316093,
      "historical_cone": 13.631578638028637,
      "paired_delta": -3.513797316699039,
      "paired95ci": [
        -3.7686522329083996,
        -3.22759373280046
      ]
    },
    "fixed_token_count": {
      "human": 858.3635,
      "base": 686.666,
      "expert": 370.244,
      "historical_base": 701.3615,
      "historical_cone": 682.722,
      "paired_delta": -316.422,
      "paired95ci": [
        -325.86671249999995,
        -306.8394875
      ]
    },
    "whitespace_words": {
      "human": 628.6215,
      "base": 497.659,
      "expert": 284.167,
      "historical_base": 506.5845,
      "historical_cone": 502.7205,
      "paired_delta": -213.492,
      "paired95ci": [
        -219.9237125,
        -206.4722625
      ]
    },
    "characters": {
      "human": 3690.662,
      "base": 3308.795,
      "expert": 1650.1825,
      "historical_base": 3372.837,
      "historical_cone": 3245.9915,
      "paired_delta": -1658.6125,
      "paired95ci": [
        -1700.625425,
        -1611.810025
      ]
    },
    "mean_word_len": {
      "human": 4.7124710255587585,
      "base": 5.29901914381053,
      "expert": 4.605062292174038,
      "historical_base": 5.295809816341491,
      "historical_cone": 5.1088054261547,
      "paired_delta": -0.6939568516364925,
      "paired95ci": [
        -0.7154329793514712,
        -0.6720580533154238
      ]
    },
    "longword_rate_ge10": {
      "human": 0.05786167468063766,
      "base": 0.09969084815111688,
      "expert": 0.05266852065506798,
      "historical_base": 0.09940085953093548,
      "historical_cone": 0.08867284858456216,
      "paired_delta": -0.047022327496048885,
      "paired95ci": [
        -0.04905133038812932,
        -0.044914202959057216
      ]
    },
    "ttr": {
      "human": 0.4646555560960963,
      "base": 0.476706651231559,
      "expert": 0.46731385829588046,
      "historical_base": 0.47515714736115605,
      "historical_cone": 0.4408826569302387,
      "paired_delta": -0.009392792935678546,
      "paired95ci": [
        -0.01456295441215851,
        -0.004579432244846972
      ]
    },
    "page_burst": {
      "human": 1003.1127753576015,
      "base": 124.19555369839392,
      "expert": 336.17720182456014,
      "historical_base": 129.7658371986992,
      "historical_cone": 177.07001540720202,
      "paired_delta": 211.98164812616616,
      "paired95ci": [
        74.20152785262952,
        396.0984267448633
      ]
    },
    "repeat_start_run3": {
      "human": 0.2375,
      "base": 0.2285,
      "expert": 0.253,
      "historical_base": 0.3285,
      "historical_cone": 0.2765,
      "paired_delta": 0.0245,
      "paired95ci": [
        0.0009875000000000007,
        0.049012499999999994
      ]
    },
    "empty": {
      "human": 0.0,
      "base": 0.0,
      "expert": 0.0,
      "historical_base": 0.0,
      "historical_cone": 0.0,
      "paired_delta": 0.0,
      "paired95ci": [
        0.0,
        0.0
      ]
    },
    "cap_hit": {
      "human": 0.0,
      "base": 0.169,
      "expert": 0.0125,
      "historical_base": 0.0,
      "historical_cone": 0.0,
      "paired_delta": -0.1565,
      "paired95ci": [
        -0.1725,
        -0.1405
      ]
    },
    "rep_loop": {
      "human": 0.0,
      "base": 0.0,
      "expert": 0.001,
      "historical_base": 0.0,
      "historical_cone": 0.0,
      "paired_delta": 0.001,
      "paired95ci": [
        0.0,
        0.0025
      ]
    },
    "unexpected_character_rate": {
      "human": 7.950872827889747e-07,
      "base": 1.5070067758599604e-06,
      "expert": 6.345177664974619e-07,
      "historical_base": 1.2987026658161848e-06,
      "historical_cone": 0.0,
      "paired_delta": -8.724890093624985e-07,
      "paired95ci": [
        -2.676294633538666e-06,
        8.939417595515629e-07
      ]
    },
    "non_english_character_rate": {
      "human": 0.0003932134307056947,
      "base": 0.00013167691455761094,
      "expert": 0.00025468870873991364,
      "historical_base": 0.00014189700091632934,
      "historical_cone": 0.00013879863283128906,
      "paired_delta": 0.00012301179418230273,
      "paired95ci": [
        3.5832596639529664e-05,
        0.00020752526917641972
      ]
    },
    "training_word_rarity_nats": {
      "human": 7.8035010384940415,
      "base": 8.064658653593,
      "expert": 7.504689380269631,
      "historical_base": 8.059660641155142,
      "historical_cone": 7.877223583893059,
      "paired_delta": -0.5599692733233704,
      "paired95ci": [
        -0.5868189555013194,
        -0.5312468054922478
      ]
    },
    "training_word_oov_rate": {
      "human": 0.010148877612250551,
      "base": 0.0049545350394098525,
      "expert": 0.007205710940527181,
      "historical_base": 0.004951255660104235,
      "historical_cone": 0.004713799595342232,
      "paired_delta": 0.0022511759011173285,
      "paired95ci": [
        0.001137831458371458,
        0.0036573017120947646
      ]
    },
    "option_wrapper": {
      "human": 0.0,
      "base": 0.2,
      "expert": 0.0505,
      "historical_base": 0.2,
      "historical_cone": 0.2005,
      "paired_delta": -0.1495,
      "paired95ci": [
        -0.1655,
        -0.133
      ]
    },
    "assistant_preface": {
      "human": 0.0,
      "base": 0.0,
      "expert": 0.053,
      "historical_base": 0.0,
      "historical_cone": 0.0,
      "paired_delta": 0.053,
      "paired95ci": [
        0.0434875,
        0.0635
      ]
    }
  },
  "distances": {
    "L2-1": {
      "base": 0.02906163662772162,
      "expert": 0.022144033488984215,
      "historical_base": 0.028940514092103572,
      "historical_cone": 0.029127328372322736,
      "human_floor": 0.008073846371447806,
      "recovery": 0.32960130886907196
    },
    "L2-2": {
      "base": 0.01241105042702878,
      "expert": 0.014798941629477258,
      "historical_base": 0.012706657466151293,
      "historical_cone": 0.013251067221917458,
      "human_floor": 0.005002273829992486,
      "recovery": -0.32230573714473953
    },
    "L2-3": {
      "base": 0.006615217004254781,
      "expert": 0.004305352452957473,
      "historical_base": 0.006978098397409446,
      "historical_cone": 0.00723905748621644,
      "human_floor": 0.003945395560136238,
      "recovery": 0.865175667978022
    },
    "JSD-nats": {
      "base": 0.1054327105606854,
      "expert": 0.05729762336622043,
      "historical_base": 0.10695706211294842,
      "historical_cone": 0.09503636149711513,
      "human_floor": 0.08331861271188122,
      "recovery": 2.176669720988319
    }
  },
  "feature_definition": "existing metrics.Footprint Shan14/style; additional diagnostics explicitly named, not quality judgments",
  "uncertainty": "corpus distances point estimates; paired feature95% bootstrap CIs (1000 draws, seed20261021)",
  "historical_comparison": "historical_base and historical_cone use a separate archived runtime stratum"
}