{
 "experiment": "SPIRA v3 cortex representation repair \u2014 controlled A/B vs v2 baseline",
 "date": "2026-10-22",
 "protocol": {
  "corpus": "same rebuilt corpus for both arms (train 13.27 MB / test 640 KB)",
  "vocab_size": 4096,
  "snn_tokens": 200000,
  "epochs": 2,
  "am_contexts": 50000,
  "test_positions": 20000,
  "vocab_coverage_test": 0.4524,
  "headline_metric": "SNN alone, in-vocab accuracy on held-out test positions",
  "bigram_reference": "patch bigram trained on train cols [0:600k], evaluated on exactly the same test positions at the same vocab 4096"
 },
 "headline": {
  "snn_invocab_test_v2_baseline": 0.003978779840848806,
  "snn_invocab_test_v3": 0.020667550839964632,
  "ratio_v3_over_v2": "x5.2",
  "bigram_4096_invocab_test": 0.04940318302387268,
  "gap_to_bigram": "x12.4 (v2) -> x2.4 (v3); beat-the-bigram criterion NOT met",
  "snn_invocab_trained_region_v2_baseline": 0.0376034093757834,
  "snn_invocab_trained_region_v3": 0.1328653797944347,
  "training_speed_tps_v2_baseline": "~530 (512.6 / 561.8 per epoch)",
  "training_speed_tps_v3": 188.97756640356553,
  "checkpoint_mb_v2_baseline": 14.6,
  "checkpoint_mb_v3": 45.9,
  "notes": [
   "Free generation still incoherent in both arms.",
   "At this small budget, fusion hurts on held-out: v3 fused in-vocab 0.001326259946949602 < SNN alone 0.020667550839964632."
  ]
 },
 "bigram_reference_detail": {
  "bigram_4096_invocab_test20k": 0.04940318302387268,
  "n_invocab": 9048
 },
 "baseline_arm_full": {
  "label": "baseline",
  "hist": [
   {
    "acc": 0.092515,
    "acc_fast": 0.112785,
    "tps": 512.6229927407619
   },
   {
    "acc": 0.065475,
    "acc_fast": 0.101045,
    "tps": 561.7816027951075
   }
  ],
  "test": {
   "n_positions": 20000,
   "vocab_coverage": 0.4524,
   "snn_acc": 0.0018,
   "hier_acc": 0.00025,
   "am_acc": 0.0001,
   "fused_acc": 0.00035,
   "snn_acc_invocab": 0.003978779840848806,
   "hier_acc_invocab": 0.0005526083112290009,
   "am_acc_invocab": 0.00022104332449160034,
   "fused_acc_invocab": 0.0007736516357206013,
   "corrupt_lanes": 0
  },
  "trained": {
   "n_positions": 8000,
   "vocab_coverage": 0.498625,
   "snn_acc": 0.01875,
   "hier_acc": 0.00675,
   "am_acc": 0.011125,
   "fused_acc": 0.017375,
   "snn_acc_invocab": 0.0376034093757834,
   "hier_acc_invocab": 0.013537227375282025,
   "am_acc_invocab": 0.01779894710453748,
   "fused_acc_invocab": 0.030834795688142392,
   "corrupt_lanes": 0
  },
  "gen": "The old man looked at the  retuiltIN S            .\n    IN S add\n        r      ifotIthing beithingtory     rethingeek         eIGHTND RIGHT it athingthingthing if t:\n        #irlother:\n        #\n        f\n        \" andeturotIe)\n     a s\n        fone)Imone)e the .\n    .\n    thingotICAPef g      if##########IGHTtry:            lf._lf._otI      iflear a singl"
 },
 "v3_arm_full": {
  "label": "v3",
  "hist": [
   {
    "acc": 0.120205,
    "acc_fast": 0.142835,
    "tps": 188.97756640356553
   },
   {
    "acc": 0.11196,
    "acc_fast": 0.15781,
    "tps": 188.5136375504029
   }
  ],
  "test": {
   "n_positions": 20000,
   "vocab_coverage": 0.4524,
   "snn_acc": 0.00935,
   "hier_acc": 0.0005,
   "am_acc": 0.0001,
   "fused_acc": 0.0006,
   "snn_acc_invocab": 0.020667550839964632,
   "hier_acc_invocab": 0.0011052166224580018,
   "am_acc_invocab": 0.00022104332449160034,
   "fused_acc_invocab": 0.001326259946949602,
   "corrupt_lanes": 0
  },
  "trained": {
   "n_positions": 8000,
   "vocab_coverage": 0.498625,
   "snn_acc": 0.06625,
   "hier_acc": 0.005375,
   "am_acc": 0.011125,
   "fused_acc": 0.015875,
   "snn_acc_invocab": 0.1328653797944347,
   "hier_acc_invocab": 0.010779644021057909,
   "am_acc_invocab": 0.01779894710453748,
   "fused_acc_invocab": 0.02782652293807972,
   "corrupt_lanes": 0
  },
  "gen": "The old man looked at the rrorone\nr hi            \n    r hi            r hiand a             a l            on ar hi\n    on alooloor hiloolectueEloo            looynon at see a slectlectlector\non a##########yn a s##########ramelooErlooow, golectlectErlooow,loo.\n    .\n    lect            lectlect            rameloo a s"
 }
}