[
  { "_note": "Bottleneck experiment — fusion_dim=8 forces each bridge to compress aggressively. 4 bridges × 3 reps; if shapes-are-just-equivalent hypothesis is right, all 4 should still converge; if the bridges differ in compression priorities, AUC should diverge meaningfully.",

    "run_name": "experiments/tri_v1/bottleneck/hadamard_tritower", "reps": 3,
    "stage_overrides": {
      "nt": { "args": { "fusion_dim": 8 } }
    }
  },
  { "run_name": "experiments/tri_v1/bottleneck/concat_tritower", "reps": 3,
    "stage_overrides": {
      "nt": {
        "module": "v4.classes.bridges.concat_bridge",
        "class":  "ConcatBridge",
        "args":   { "fusion_dim": 8 }
      }
    }
  },
  { "run_name": "experiments/tri_v1/bottleneck/pairwise_tritower", "reps": 3,
    "stage_overrides": {
      "nt": {
        "module": "v4.classes.bridges.pairwise_bridge",
        "class":  "PairwiseAdditiveBridge",
        "args":   { "fusion_dim": 8 }
      }
    }
  },
  { "run_name": "experiments/tri_v1/bottleneck/gated_tritower", "reps": 3,
    "stage_overrides": {
      "nt": {
        "module": "v4.classes.bridges.gated_bridge",
        "class":  "GatedAdditiveBridge",
        "args":   { "fusion_dim": 8 }
      }
    }
  }
]
