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  "created_at": "2026-10-05T02:57:23.677975+00:00",
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  "final_model_evaluation": "Final model refit on all six participants. Reported evaluation is from six separate outer-fold models; the final fit has no independent test cohort.",
  "phone_validated": false,
  "uncertainty": "No calibrated individual prediction interval. Window spread is not an accuracy interval.",
  "limitations": [
    "Six participants, one Nexus 6P phone model; no independent iPhone or browser cohort.",
    "Pulse oximeter reference rather than arterial co-oximetry.",
    "Alignment uses nominal 30 Hz and shared recording start; sensor averaging/lag remain limitations.",
    "Raw frame means from whole-frame decoded video; browser exposure, white balance, processing and flash differ.",
    "No clinical threshold, hypoxemia triage, skin-tone subgroup, personalization or glucose validation.",
    "Adjacent nonoverlapping windows remain correlated; participant count is the effective generalization sample size.",
    "Live signal gates are provisional engineering rules, not clinical validation."
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  "runtime": {
    "python": "3.12.14",
    "torch": "2.14.1+cpu",
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  "release_decision": "Experimental only. Fixed CNN candidate; baseline comparisons are reported without claiming clinical readiness.",
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    "family": "ratio_ridge",
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    "phone_validated": false
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}