loop28_research_boundary.v0.json

{
  "schema_name": "neurodecodekit.loop28_research_boundary",
  "schema_version": "0.1.0",
  "prepared_at": "2026-07-12",
  "status": "planning_research_complete_preregistration_blocked",
  "proof_posture": "primary_source_and_public_code_research_no_data_model_or_target_access",
  "authorized_now": false,
  "authorization": {
    "loop28_preregistration_authorized_now": false,
    "loop28_execution_authorized_now": false,
    "loop27_acquisition_authorized_now": false,
    "selected_candidate_download_authorized_now": false,
    "local_log_payload_hash_authorized_now": false,
    "fif_header_read_authorized_now": false,
    "fif_signal_read_authorized_now": false,
    "mat_content_read_authorized_now": false,
    "target_label_or_text_read_authorized_now": false,
    "source_or_candidate_model_run_authorized_now": false,
    "training_or_parameter_update_authorized_now": false,
    "candidate_calibration_authorized_now": false,
    "candidate_final_open_authorized_now": false,
    "candidate_unlabeled_transductive_fit_authorized_now": false,
    "backup_substitution_authorized_now": false,
    "consumed_source_evidence_reopen_authorized_now": false,
    "language_model_run_authorized_now": false,
    "stream_board_device_or_hardware_authorized_now": false,
    "rw3_stage_a_authorized_now": false,
    "authorization_sentence_exists": false,
    "reason": "This registry resolves the transfer taxonomy and recommends a final-only decision rule. It does not freeze a source model, qualify S25, prepare an experiment, or authorize any protected operation."
  },
  "research_question": "What exact transfer claim can one final-only recording from an unseen canonical person test without fitting anything to that person?",
  "brain2qwerty_v2_reference_boundary": {
    "paper_title": "Accurate Decoding of Natural Sentences from Non-Invasive Brain Recordings",
    "paper_date": "2026-06-29",
    "reviewed_code_commit": "3bf5a4099ca0d23bbe994b2287905760236e56e0",
    "code_public": true,
    "code_license": "CC-BY-NC-4.0",
    "englishbcbl_data_public": false,
    "englishbcbl_data_status": "embargoed_until_review_completion",
    "participants": 9,
    "sessions_per_participant": 10,
    "hours_per_participant": 10,
    "aggregate_recording_hours": 90,
    "reported_typed_sentences_approx": 22000,
    "meg_channels": 306,
    "sampling_rate_hz": 1000,
    "model_input_is_continuous_sentence_recording": true,
    "keypress_timing_required_at_inference": false,
    "model_is_causal": false,
    "model_consumes_entire_sentence": true,
    "incremental_word_display_supported": false,
    "end_to_end_low_latency_measured": false,
    "participant_index_conditioned_affine_layer": true,
    "joint_training_includes_target_participant_data": true,
    "leave_one_out_regime_finetunes_on_target_participant": true,
    "strict_unseen_person_zero_shot_result_reported": false,
    "sentence_text_hash_split_prevents_cross_partition_text_leakage": true,
    "cross_subject_mean_is_not_itself_a_heldout_person_result": true,
    "public_quickstart_requires_cuda_capable_gpu": true,
    "paper_training_hardware": "8_x_A100_80_GB",
    "paper_training_wall_hours": 19.5,
    "local_reproduction_eligible_now": false
  },
  "transfer_taxonomy": [
    {
      "level_id": "T0",
      "name": "same_session_heldout_text",
      "source_person_seen_during_training": true,
      "target_session_seen_during_training": true,
      "target_final_text_seen_during_training": false,
      "target_person_fit_allowed": true,
      "claim": "heldout_text_for_that_person_and_session_only",
      "local_evidence": "S21 session 1 source-test evidence is consumed and cannot be reopened."
    },
    {
      "level_id": "T1",
      "name": "same_person_cross_session",
      "source_person_seen_during_training": true,
      "target_session_seen_during_training": false,
      "target_final_text_seen_during_training": false,
      "target_person_fit_allowed": true,
      "claim": "cross_session_for_that_person_only",
      "local_evidence": "S21 session 2 is consumed and the frozen MEG model performed worse than the no-signal prior."
    },
    {
      "level_id": "T2",
      "name": "unseen_person_strict_zero_shot",
      "source_person_seen_during_training": false,
      "target_session_seen_during_training": false,
      "target_final_text_seen_during_training": false,
      "target_person_fit_allowed": false,
      "target_corpus_signal_statistics_allowed": false,
      "deterministic_header_geometry_compatibility_allowed": true,
      "claim": "zero_shot_transfer_to_one_unseen_canonical_person",
      "local_evidence": "S25 session 2 block 2 is a metadata-only candidate and remains unopened."
    },
    {
      "level_id": "T3",
      "name": "unseen_person_supervised_calibrated",
      "source_person_seen_during_training": false,
      "target_session_seen_during_training": false,
      "target_final_text_seen_during_training": false,
      "target_person_fit_allowed": true,
      "requires_physically_separate_calibration_and_final_partitions": true,
      "claim": "calibrated_transfer_at_the_exact_reported_budget",
      "local_evidence": "No eligible physically separated calibration/final design has been selected."
    }
  ],
  "transductive_boundary": {
    "name": "unseen_person_unlabeled_target_adaptation",
    "uses_target_labels": false,
    "uses_target_corpus_signal_distribution": true,
    "counts_as_strict_zero_shot_T2": false,
    "required_label": "transductive_zero_label_adaptation",
    "authorized_now": false
  },
  "selected_future_question": {
    "claim_level": "T2",
    "claim_id": "unseen_person_strict_zero_shot_single_candidate",
    "candidate_id": "spanishbcbl-meg-s25-session2-block2-v0",
    "subject": "S25",
    "session": 2,
    "block": 2,
    "same_nominal_meg_system_as_source": true,
    "same_prompted_typing_task_as_source": true,
    "published_alias_with_observed_s21_person": false,
    "candidate_train_rows": 0,
    "candidate_validation_rows": 0,
    "candidate_calibration_rows": 0,
    "candidate_target_wide_fit_rows": 0,
    "candidate_final_rows": "all_eligible_performed_unique_rows",
    "minimum_final_unique_rows": 48,
    "minimum_row_reason": "Pragmatic 75-percent retention floor from the nominal 64-row block; not a power claim.",
    "candidate_side_model_selection": false,
    "candidate_side_threshold_selection": false,
    "candidate_side_normalization_fit": false,
    "candidate_side_subject_embedding_fit": false,
    "candidate_side_adapter_fit": false,
    "candidate_side_unlabeled_corpus_adaptation": false,
    "header_geometry_use": "deterministic_compatibility_only",
    "candidate_eligible_for_T3_calibrated_claim": false,
    "candidate_T3_ineligibility_reason": "The selected block is final-only and has no physically separate calibration partition."
  },
  "future_final_only_decision_rule": {
    "status": "research_recommendation_ready_not_preregistered_or_authorized",
    "primary_estimand": "macro_mean_sentence_cer_prior_minus_frozen_zero_shot_model",
    "positive_direction": "frozen_zero_shot_model_better",
    "primary_comparator": "source_train_only_no_signal_sentence_prior",
    "minimum_absolute_macro_cer_improvement": 0.05,
    "minimum_final_unique_rows": 48,
    "paired_unit": "unique_final_sentence",
    "randomization_test": {
      "method": "deterministic_monte_carlo_paired_label_swap",
      "statistic": "mean_paired_sentence_cer_difference",
      "alternative": "frozen_zero_shot_model_better_than_prior",
      "random_sign_assignments": 65535,
      "observed_assignment_included": true,
      "total_reference_statistics": 65536,
      "seed_source": "future_frozen_contract_sha256",
      "maximum_p_value": 0.05,
      "exchangeability_scope": "paired_final_sentences_for_this_fixed_candidate_only",
      "population_inference_supported": false
    },
    "descriptive_interval": {
      "method": "paired_sentence_index_bootstrap",
      "confidence_level": 0.95,
      "may_override_gate": false,
      "population_inference_supported": false
    },
    "secondary_metrics": [
      "corpus_CER",
      "WER_where_target_tokenization_is_valid",
      "exact_sequence_accuracy",
      "per_sentence_edit_counts",
      "candidate_prior_wins_ties_losses"
    ],
    "required_prediction_freeze_order": [
      "freeze_source_model_preprocessing_vocabulary_and_decode_hashes",
      "freeze_prior_and_all_corruption_control_hashes",
      "produce_and_hash_model_prior_and_control_predictions_without_final_target_text",
      "open_all_eligible_final_targets_once",
      "score_every_prediction_in_one_append_only_pass",
      "mark_candidate_consumed_regardless_of_outcome"
    ],
    "required_controls": [
      {
        "control_id": "source_train_only_no_signal_sentence_prior",
        "pass_relation": "candidate_macro_cer_at_least_0_05_lower_and_randomization_p_at_most_0_05"
      },
      {
        "control_id": "same_checkpoint_zero_candidate_signal",
        "pass_relation": "candidate_macro_cer_strictly_lower"
      },
      {
        "control_id": "channel_name_hash_derangement",
        "pass_relation": "candidate_macro_cer_strictly_lower"
      },
      {
        "control_id": "nonwrapping_zero_filled_time_displacement",
        "pass_relation": "candidate_macro_cer_strictly_lower"
      }
    ],
    "conjunctive_control_gate": true,
    "control_tie_passes": false,
    "effect_threshold_tie_passes": true,
    "p_value_threshold_tie_passes": true,
    "missing_required_field_decision": "park",
    "hash_or_access_violation_decision": "park",
    "resource_cap_violation_decision": "park",
    "failure_allows_restart": false,
    "failure_allows_threshold_change": false,
    "failure_allows_calibration": false,
    "failure_allows_automatic_backup": false,
    "all_gates_pass_decision": "support_T2_for_this_one_S25_person_session_task_only",
    "all_gates_pass_authorizes_next_loop_execution": false
  },
  "identity_and_text_claim_boundary": {
    "unseen_canonical_person_candidate": true,
    "unseen_text_currently_verified": false,
    "future_redacted_overlap_outputs": [
      "candidate_unique_sentence_hash_count",
      "source_train_overlap_count",
      "source_validation_overlap_count",
      "consumed_source_test_overlap_count"
    ],
    "forbidden_overlap_outputs": [
      "sentence_plaintext",
      "typed_response_plaintext",
      "per_item_target_preview"
    ],
    "zero_overlap_claim": "unseen_person_and_unseen_text_for_this_candidate",
    "positive_overlap_claim": "unseen_person_with_familiar_text_exposure_disclosed",
    "unavailable_overlap_claim": "unseen_person_only_text_novelty_unavailable",
    "overlap_may_change_final_membership_after_preregistered_eligibility": false,
    "single_person_population_generalization": false
  },
  "calibrated_transfer_boundary": {
    "status": "separate_future_design_not_selected_or_authorized",
    "s25_block2_may_be_repurposed_for_calibration": false,
    "requires_new_metadata_selection": true,
    "requires_physically_separate_calibration_and_final_recordings": true,
    "requires_nested_predeclared_calibration_budgets": true,
    "requires_fixed_adapter_and_optimizer_before_final_open": true,
    "requires_zero_shot_prediction_from_same_source_checkpoint": true,
    "requires_identical_final_rows_across_budgets": true,
    "must_report_calibration_examples_seconds_runtime_rss_and_updates": true,
    "calibrated_result_may_be_labeled_zero_shot": false,
    "future_roadmap_loop": 32
  },
  "dependencies": {
    "loop28_planning_research_complete": true,
    "loop28_preregistration_prepared": false,
    "loop28_authorization_request_prepared": false,
    "loop25_compatible_mechanics_result_required": true,
    "loop25_dependency_satisfied_now": false,
    "loop26_frozen_successful_source_model_and_controls_required": true,
    "loop26_dependency_satisfied_now": false,
    "loop27_acquired_header_qualified_holdout_required": true,
    "loop27_dependency_satisfied_now": false,
    "loop27_final_only_decision_rule_research_dependency_satisfied": true,
    "loop27_other_preregistration_blockers_remain": true,
    "separate_loop28_preregistration_required": true,
    "separate_loop28_authorization_required": true
  },
  "future_access_order": [
    "close_loop25_with_a_compatible_measured_causal_preprocessing_result",
    "preregister_authorize_and_close_loop26_with_one_frozen_source_model_and_control_package",
    "bind_loop27_candidate_target_isolation_header_protocol_this_T2_rule_and_staged_permissions",
    "authorize_acquisition_or_local_log_hash_in_a_separate_tested_pushed_green_commit",
    "qualify_header_without_signal_samples",
    "run_separately_authorized_redacted_eligibility_and_overlap_audits_without_plaintext",
    "produce_and_hash_model_prior_and_control_predictions_without_final_target_text",
    "open_all_final_targets_once_and_score_one_append_only_report",
    "close_as_support_or_park_without_tuning_calibration_restart_or_backup"
  ],
  "remaining_preregistration_blockers": [
    "Loop 25 has no compatible measured causal preprocessing result.",
    "Loop 26 has no frozen successful source checkpoint or control package.",
    "Loop 27 has no preregistration, acquisition, header, signal, target, or final-open authorization.",
    "S25 exact sensor compatibility and performed-row eligibility remain unopened.",
    "The redacted overlap and target-isolation implementations do not exist or have frozen hashes.",
    "The future runtime cap cannot be frozen until the Loop 26 checkpoint is measured.",
    "No Loop 28 preregistration or authorization sentence exists."
  ],
  "resource_boundaries": {
    "current_cpu_threads": 1,
    "current_workers": 1,
    "current_downloaded_payload_bytes": 0,
    "current_generated_planning_artifact_cap_bytes": 8388608,
    "external_browser_peak_rss_bytes": null,
    "external_browser_peak_rss_unavailable_reason": "The browser research tool does not expose process-level RSS.",
    "end_to_end_research_runtime_sec": null,
    "end_to_end_research_runtime_unavailable_reason": "Interactive source review spans external tool calls and human reasoning rather than one measurable local process.",
    "future_cpu_threads": 1,
    "future_workers": 1,
    "future_model": "frozen_loop26_checkpoint_only",
    "future_larger_model_runs": 0,
    "future_language_model_runs": 0,
    "future_candidate_parameter_updates": 0,
    "future_generated_artifact_cap_bytes": 33554432,
    "future_peak_rss_cap_bytes": 1073741824,
    "future_runtime_cap_sec": null,
    "future_runtime_cap_unavailable_reason": "Must be set from a measured Loop 26 checkpoint before S25 signal or target access.",
    "future_automatic_backup_candidates": 0
  },
  "research_access_counters": {
    "high_level_public_web_research_operations": 10,
    "github_metadata_api_operations": 1,
    "remote_code_payload_downloads": 0,
    "remote_data_payload_downloads": 0,
    "remote_payload_bytes": 0,
    "local_s25_path_metadata_checks": 0,
    "local_s25_log_payload_hash_reads": 0,
    "candidate_fif_header_reads": 0,
    "candidate_fif_signal_reads": 0,
    "candidate_mat_content_reads": 0,
    "candidate_target_label_or_text_reads": 0,
    "source_consumed_evidence_reads": 0,
    "model_or_checkpoint_runs": 0,
    "training_or_parameter_updates": 0,
    "calibration_runs": 0,
    "final_evaluation_runs": 0,
    "rw3_stream_board_device_or_hardware_operations": 0
  },
  "source_bindings": [
    {
      "source_id": "brain2qwerty_v2_paper",
      "role": "continuous_input_noncausal_limit_subject_training_transfer_and_data_scale",
      "url": "https://facebookresearch.github.io/brain2qwerty/assets/brain2qwerty_v2.pdf"
    },
    {
      "source_id": "brain2qwerty_v2_project",
      "role": "official_result_code_data_and_remaining_challenge_boundary",
      "url": "https://facebookresearch.github.io/brain2qwerty/"
    },
    {
      "source_id": "brain2qwerty_v2_code_pinned",
      "role": "public_cuda_oriented_whole_sentence_implementation_and_embargo_statement",
      "url": "https://github.com/facebookresearch/brain2qwerty/tree/3bf5a4099ca0d23bbe994b2287905760236e56e0/brain2qwerty_v2"
    },
    {
      "source_id": "brain2qwerty_v1_paper",
      "role": "spanishbcbl_prompted_typing_source_and_subject_specific_baseline_context",
      "url": "https://www.nature.com/articles/s41593-026-02303-2"
    },
    {
      "source_id": "meg_decoding_across_subjects",
      "role": "cross_subject_domain_shift_and_zero_label_versus_calibrated_transfer_taxonomy",
      "url": "https://arxiv.org/abs/1404.4175"
    },
    {
      "source_id": "moabb_benchmark",
      "role": "fixed_context_cross_session_cross_subject_and_multi_dataset_reproducibility_boundary",
      "url": "https://arxiv.org/abs/1805.06427"
    },
    {
      "source_id": "brain_decoder_cross_validation_guidelines",
      "role": "small_sample_split_tuning_and_generalization_caveats",
      "url": "https://pubmed.ncbi.nlm.nih.gov/27989847/"
    },
    {
      "source_id": "classifier_permutation_tests",
      "role": "paired_permutation_and_restricted_feature_control_context",
      "url": "https://www.jmlr.org/papers/v11/ojala10a.html"
    }
  ],
  "claim_boundary": [
    "Brain2Qwerty v2 is a continuous-sentence asynchronous reference, but its paper explicitly says the current architecture is whole-sentence and noncausal.",
    "The reported v2 joint and leave-one-out-plus-finetune results do not establish strict unseen-person zero-shot decoding.",
    "S25 may become a one-person strict zero-shot candidate only after every upstream dependency and separate authorization passes.",
    "A future S25 pass cannot establish population generalization, and it cannot establish unseen text without a zero-overlap audit.",
    "No data acquisition, header compatibility, signal quality, target, model, transfer, calibration, real-time, portable-device, at-home, assistive, diagnostic, or clinical result is established."
  ]
}