{
  "seed": 42,
  "grid_size": 50,
  "hidden_size": 128,
  "heads_in_frozen_alignment": 4,
  "delta_normalized_time": 0.1,
  "hard_negative_offsets_slots": [
    -5,
    -3,
    -2,
    2,
    3,
    5
  ],
  "semantic_epochs": 40,
  "semantic_learning_rate": 0.001,
  "local_contrastive_temperature": 0.1,
  "content_probe_epochs": 40,
  "content_probe_temperature": 0.1,
  "reconstruction_probe_epochs": 40,
  "shuffle_repeats": 20,
  "random_window_repeats": 20,
  "window_ablation_status": "delta sweep and 80-percent attention-mass window deferred until the seven-method MVP is reviewed",
  "semantic_query_key_inputs": "Frozen M4 attention-pooled text value output is the semantic query input; M4 pre-attention projected Audio/Vision content is the semantic key/value input. No explicit source-time code, absolute PE, slot ID, or latent positional vector is passed to semantic Q/K. Temporal selection can still encode time indirectly.",
  "baseline_content_values": "M4 and M3 Audio/Vision use each checkpoint's actual MHA attention output. M3 Text uses attention-pooled pre-attention text features to remove its source-time query residual.",
  "temporal_role": "Frozen M4 attention supplies candidate masks; TSFA-multiply additionally multiplies semantic probabilities by M4 temporal attention",
  "local_contrastive": "same-slot positives with within-clip slot-offset negatives at +/-2, +/-3, +/-5; symmetric Text-Audio and Text-Vision loss",
  "random_candidate": "same delta-width windows with independently sampled centers at inference; 20 held-out random draws, one train draw for the train-only probe",
  "global_candidate": "all valid source positions available to semantic attention",
  "content_probe": "same train-only symmetric within-clip InfoNCE probe applied to each method; held-out negatives are positions more than two slots away",
  "content_shuffle": "independently permute each modality's 50 projected content rows within each held-out clip; M4 and TSFA-main",
  "reconstruction": "fold-train decoder predicts one aligned content representation from the other two; shift one partner by signed offsets +/-1,2,5,10 on identical target support",
  "confidence_intervals": "95-percent video_id-cluster bootstrap; 2,000 repetitions for CSV summaries",
  "methods": [
    "M3_noSourceTime",
    "M3_sourceTime",
    "M4_sourceTime",
    "TSFA-main",
    "TSFA-multiply",
    "TSFA-random",
    "TSFA-global"
  ]
}