{
  "applies_to": "Pinned first-round v1 and admissions/dilution v2 generators; descriptive correction only, no fitted data or scores changed",
  "conditional_description_fields": "Legacy conditional_model, ridge_penalty, residual_scale and centered-residual descriptions apply only when generator=ridge. Empirical generators use raw joint error windows with no fitted/subtracted conditional mean. Probability-zero controls apply no artificial errors.",
  "legacy_target_evidence_fraction": "Final-truth support, NOT observed archived/final-pair support",
  "probability_zero_controls": "Probability zero means no synthetic perturbation, regardless of legacy synthetic_seasons or recent_donor_inputs descriptions; early_actual still supplies real recent-season reports",
  "empirical_unsupported_cells": "Zero empirical perturbation when donor archived/final pair is absent",
  "learned_unsupported_cells": "Empirical residual zero when pair absent; conditional mean can extrapolate into those cells, so inherited unsupported_cells=unchanged is not valid for the learned generator",
  "truth_support": "Final-truth availability is never invented. RSV admission inputs are absent in 2022-23.",
  "covariate_scope": "C2 six-group covariate set; target support is shared by C1/C2/C3. C3 uses its Kinsa subset; C1 has no covariates.",
  "support_denominator": "Donor origins x context ages x locations, within each signal; eligible reference weeks must belong to the permitted donor season",
  "folds": [
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      "reporting_error_training_season": "2024-2025",
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          "archived_pair_fraction_given_final_truth": 0.9926338653319482
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          "signal": "nhsn_covid_admissions",
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      "forecast_evaluation_season": "2024-2025",
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  ]
}