{
  "phase": "4A-R3 Tier C v4 final revision protocol freeze",
  "protocol_version": "tier_c_v4",
  "scientific_scope": "Final controlled revision of the dimensionless physics-informed synthetic spatial bridge. This is not real microscopy and is not a calibrated alloy model.",
  "revision_reason": {
    "tier_c_v3_interface_failure_systematic": true,
    "v3_interface_gate_failure_fraction": 0.9296875,
    "v3_fraction_carriers_all_pairs_failing": 0.8671875,
    "v3_length_interface_spearman": -0.18274633783474475,
    "targeted_change": "Replace spectral-band rank transport with volume-preserving diffusion-threshold coarsening."
  },
  "carrier_split": {
    "counts": {
      "train": 96,
      "val": 32,
      "test": 32
    },
    "validation_source": "unopened Tier C v2 test IDs",
    "test_source": "unopened Tier C v3 test IDs",
    "overlap_summary": {
      "v4_validation_vs_v2_test": 32,
      "v4_validation_vs_v3_validation": 0,
      "v4_validation_vs_v3_test": 0,
      "v4_test_vs_v3_test": 32,
      "v4_test_vs_v2_test": 0
    }
  },
  "field_shape": [
    4,
    32,
    32
  ],
  "carrier_parameter_dimension": 8,
  "transformation_split_counts": {
    "train": 86,
    "val": 9,
    "test": 9
  },
  "coarsening_protocol": {
    "protocol_version": "tier_c_v4",
    "revision_scope": "coarsening construction only",
    "construction_name": "Volume-preserving diffusion-threshold coarsening with exact rank transport.",
    "motivation_from_v3": {
      "overall_interface_gate_failure_fraction": 0.9296875,
      "failure_scope": "systematic across anisotropy and defect-recovery combinations",
      "fraction_carriers_all_four_pairs_failing": 0.8671875,
      "spearman_length_ratio_vs_interface_ratio": -0.18274633783474475,
      "strongest_continuous_association": "base_length_scale_pixels",
      "strongest_association_spearman": -0.7231826090841283
    },
    "fine_construction": {
      "shared_seed_field": true,
      "diffusion_sigma": 0.75,
      "rank_transport_preserves_phase_values": true
    },
    "coarse_construction": {
      "initial_score": "The same fine score used by the paired fine state.",
      "isotropic_diffusion_sigma": 1.25,
      "anisotropic_parallel_multiplier": 1.5,
      "anisotropic_perpendicular_multiplier": 0.8,
      "minimum_iterations": 2,
      "maximum_iterations": 32,
      "rank_transport_after_every_iteration": true,
      "internal_interface_ratio_target": 0.62,
      "internal_characteristic_length_ratio_target": 2.6,
      "selection_rule": "Choose the earliest deterministic diffusion iteration satisfying both internal targets.",
      "failure_rule": "Reject the complete dataset generation if any development pair does not satisfy both internal targets within the frozen iteration limit."
    },
    "independent_verification": {
      "metrics_recomputed_from_saved_raw_fields": true,
      "constructor_intermediate_metrics_not_used_as_final_audit": true,
      "verification_code_separate_from_construction_code": true
    },
    "marginal_preservation": {
      "phase_value_multiset_preserved": true,
      "defect_value_multiset_preserved": true,
      "orientation_pair_multiset_preserved": true,
      "state_dependent_phase_mean": false,
      "state_dependent_phase_variance": false,
      "state_dependent_defect_mean": false,
      "state_dependent_defect_variance": false
    },
    "carrier_scale_decoupling": {
      "base_length_scale_used_for_initialization": true,
      "base_length_scale_controls_final_coarse_iteration": false,
      "coarse_stopping_rule_uses_pairwise_morphology": true
    }
  },
  "acceptance_gates": {
    "protocol_version": "tier_c_v4",
    "acceptance_scope": "Fresh Tier C v4 training and validation carrier instances only.",
    "numerical_physics": {
      "required": true,
      "all_values_finite": true,
      "minimum_energy_nonincrease_fraction": 0.99,
      "maximum_phase_mean_drift": 1e-05,
      "maximum_defect_mean_drift": 1e-05,
      "phase_minimum": -1.000001,
      "phase_maximum": 1.000001,
      "defect_minimum": -1e-06,
      "defect_maximum": 1.000001,
      "maximum_unresolved_simulation_failures": 0
    },
    "coarsening_construction": {
      "required": true,
      "all_pairs_find_valid_iteration": true,
      "maximum_selected_iteration": 32,
      "minimum_selected_iteration": 2,
      "internal_target_interface_ratio": 0.62,
      "internal_target_length_ratio": 2.6
    },
    "independent_coarsening_morphology": {
      "required": true,
      "minimum_mean_characteristic_length_ratio": 2.5,
      "minimum_worst_pair_characteristic_length_ratio": 1.8,
      "maximum_mean_interface_density_ratio": 0.7,
      "maximum_pair_interface_density_ratio": 0.85,
      "minimum_fraction_pairs_below_interface_threshold": 0.95,
      "maximum_sorted_phase_difference": 1e-07,
      "maximum_sorted_defect_difference": 1e-07,
      "maximum_sorted_orientation_difference": 1e-07,
      "test_fields_used": false
    },
    "basic_manifold_quality": {
      "required": true,
      "all_training_channels_nonconstant": true,
      "every_state_has_positive_carrier_variation": true,
      "maximum_exact_duplicate_count": 0
    },
    "state_separability": {
      "required": true,
      "diagnostic_model": "Frozen residual convolutional state decoder unchanged from Tier C v2.",
      "diagnostic_architecture_changed": false,
      "diagnostic_seeds": [
        72011,
        72023,
        72037
      ],
      "minimum_mean_validation_state_accuracy": 0.8,
      "minimum_worst_seed_validation_state_accuracy": 0.75,
      "minimum_mean_validation_coarsening_accuracy": 0.9,
      "minimum_worst_seed_validation_coarsening_accuracy": 0.85,
      "test_fields_used": false,
      "diagnostic_checkpoints_eligible_for_predictive_use": false
    },
    "global_shortcut_control": {
      "required": true,
      "feature_count": 28,
      "maximum_validation_accuracy": 0.95,
      "test_fields_used": false
    },
    "affine_shortcut_control": {
      "required": true,
      "diagnostic": "Training-only PCA-128 plus ridge affine primitive operators.",
      "minimum_validation_continuous_mse": 1e-08,
      "validation_exact_primitive_rate_must_be_below": 1.0,
      "fraction_validation_carriers_all_104_exact_must_be_below": 1.0,
      "test_fields_used": false
    },
    "data_integrity": {
      "required": true,
      "v4_validation_source": "unopened Tier C v2 test IDs",
      "v4_test_source": "unopened Tier C v3 test IDs",
      "v4_validation_and_test_disjoint": true,
      "fresh_carrier_parameter_seed": true,
      "fresh_field_initialization_seed": true,
      "test_parameter_files_absent": true,
      "test_field_files_absent": true,
      "test_manifest_files_absent": true,
      "validation_statistics_used_for_normalization": false,
      "test_statistics_used_for_normalization": false
    },
    "decision_rule": {
      "all_required_gates_must_pass": true,
      "thresholds_may_be_changed_after_execution": false,
      "diagnostic_architecture_may_be_changed_after_execution": false,
      "failed_v4_must_be_frozen": true,
      "tier_c_v5_allowed": false
    }
  },
  "test_sealing_policy": {
    "protocol_version": "tier_c_v4",
    "test_carrier_ids_source": "unopened Tier C v3 test split",
    "test_carrier_parameters_generated_before_checkpoint_freeze": false,
    "test_clean_fields_generated_before_checkpoint_freeze": false,
    "test_noisy_fields_generated_before_checkpoint_freeze": false,
    "test_trajectory_manifests_generated_before_checkpoint_freeze": false,
    "test_metrics_computed_before_checkpoint_freeze": false,
    "development_cells": [
      "train_joint",
      "val_composition",
      "val_carrier",
      "val_joint"
    ],
    "sealed_test_cells": [
      "test_iid_pairing",
      "test_composition",
      "test_carrier",
      "test_joint"
    ],
    "development_manifest_seed": 71032,
    "sealed_test_manifest_seed": 71033,
    "test_generation_authorization_condition": "All 130 final Tier C v4 model checkpoints must be complete and frozen.",
    "test_generation_phase": "4G-R3",
    "test_fields_used_for_dataset_acceptance": false,
    "test_fields_used_for_model_selection": false
  },
  "terminal_revision_policy": {
    "protocol_version": "tier_c_v4",
    "tier_c_v4_is_final_revision": true,
    "tier_c_v5_authorized": false,
    "reason": "Tier C v1, v2, and v3 already supplied three independent development-stage negative results. A final revision using fresh unopened validation and test carrier pools is allowed, but additional adaptive revisions would create excessive development-set engineering risk.",
    "termination_conditions": [
      "Any required pre-decoder morphology or physics gate fails.",
      "The frozen state-separability diagnostic fails.",
      "The global-statistics shortcut gate fails.",
      "The affine-shortcut gate fails.",
      "The development-data integrity gate fails."
    ],
    "action_after_terminal_failure": "Freeze the failure, do not train predictive models, and report Tier C as an unresolved negative bridge result.",
    "threshold_lowering_after_failure_allowed": false,
    "new_diagnostic_architecture_after_failure_allowed": false,
    "additional_simulator_revision_after_failure_allowed": false
  },
  "training_protocol": {
    "protocol_version": "tier_c_v4",
    "development_seed": 11,
    "development_noise_fraction": 0.25,
    "training_cell": "train_joint",
    "checkpoint_selection_cell": "val_joint",
    "selection_metric": "val_joint noisy-target spatial rollout MSE only",
    "development_cells": [
      "train_joint",
      "val_composition",
      "val_carrier",
      "val_joint"
    ],
    "test_cells": [
      "test_iid_pairing",
      "test_composition",
      "test_carrier",
      "test_joint"
    ],
    "test_cells_generated_during_tuning": false,
    "test_cells_generated_during_final_fitting": false,
    "clean_targets_used_for_training": false,
    "clean_targets_used_for_selection": false,
    "structural_labels_used_for_training": false,
    "physics_metrics_used_for_model_selection": false,
    "ocm_tuning_configuration_count": 24,
    "baseline_tuning_configuration_counts": {
      "B1": 3,
      "B2": 4,
      "B3": 4,
      "B4": 4,
      "B5": 4
    },
    "total_tuning_configuration_count": 43,
    "final_fit_counts": {
      "OCM": 25,
      "B1": 5,
      "B2": 25,
      "B3": 25,
      "B4": 25,
      "B5": 25
    },
    "total_final_fit_count": 130,
    "final_model_seeds": [
      11,
      23,
      37,
      53,
      71
    ],
    "noise_levels": [
      0.0,
      0.1,
      0.25,
      0.5,
      1.0
    ],
    "fresh_initialization_required": true,
    "tuning_checkpoints_eligible_for_final_use": false,
    "final_checkpoint_freeze_required_before_test_generation": true
  },
  "hypothesis_registry": {
    "protocol_version": "tier_c_v4",
    "registry_status": "frozen",
    "hypotheses": [
      {
        "hypothesis_id": "H4R3-1",
        "statement": "Volume-preserving diffusion-threshold coarsening will satisfy both characteristic-length and interface-density requirements across development carriers.",
        "primary_metrics": [
          "Independent mean coarse-to-fine interface-density ratio.",
          "Independent mean and worst-pair characteristic-length ratios."
        ]
      },
      {
        "hypothesis_id": "H4R3-2",
        "statement": "Decoupling the final coarsening stopping rule from carrier base length will eliminate the systematic carrier-scale dependence observed in Tier C v3.",
        "primary_metric": "Spearman association between carrier base length and interface-density ratio."
      },
      {
        "hypothesis_id": "H4R3-3",
        "statement": "The final Tier C v4 morphology will satisfy the frozen eight-state and coarsening-factor validation-accuracy thresholds.",
        "primary_metrics": [
          "Three-seed mean and worst-seed eight-state validation accuracy.",
          "Three-seed mean and worst-seed coarsening-factor validation accuracy."
        ]
      },
      {
        "hypothesis_id": "H4R3-4",
        "statement": "Exact marginal-value preservation will keep global-statistics state decoding below the frozen shortcut threshold.",
        "primary_metric": "Validation accuracy of the frozen 28-feature global-statistics diagnostic."
      },
      {
        "hypothesis_id": "H4R3-5",
        "statement": "The final spatial fields will remain nontrivial under the frozen PCA-128 affine shortcut diagnostic.",
        "primary_metric": "Validation affine continuous MSE and exact structural recovery."
      }
    ]
  },
  "fresh_seeds": {
    "carrier_split": 71026,
    "carrier_parameters": 71027,
    "field_initialization": 71028,
    "solver": 71029,
    "measurement_noise": 71030,
    "development_manifests": 71032,
    "sealed_test_manifests": 71033,
    "diagnostic_seeds": [
      72011,
      72023,
      72037
    ]
  },
  "test_carrier_parameters_generated": false,
  "test_fields_generated": false,
  "test_manifests_generated": false,
  "test_metrics_computed": false,
  "diagnostic_decoder_fitted": false,
  "predictive_training_performed": false,
  "checkpoint_selection_performed": false,
  "prior_outputs_modified": false
}