{
  "schema_version": "fwdvar_diagnostics_v4",
  "issues": [
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      "code": "rejected",
      "scope": "expiry",
      "severity": "INFO",
      "expiry_dt": "2026-09-29",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2026-09-29",
      "message_short": "Rejected: missing_quotes",
      "message_long": "Expiry rejected: missing_quotes",
      "metrics": {
        "reject_reason": "missing_quotes"
      }
    },
    {
      "code": "low_tier",
      "scope": "expiry",
      "severity": "WARN",
      "expiry_dt": "2026-12-29",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2026-12-29",
      "message_short": "LOW tier (direct straddle)",
      "message_long": "Accept tier: LOW (DIRECT_STRADDLE_ONLY path)",
      "metrics": {}
    },
    {
      "code": "rejected",
      "scope": "expiry",
      "severity": "INFO",
      "expiry_dt": "2027-03-30",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2027-03-30",
      "message_short": "Rejected: insufficient_strikes",
      "message_long": "Expiry rejected: insufficient_strikes",
      "metrics": {
        "reject_reason": "insufficient_strikes"
      }
    },
    {
      "code": "low_source",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-05-26",
      "interval_to": "2026-06-02",
      "strike": null,
      "target_key": "05-26\u219206-02",
      "message_short": "LOW confidence",
      "message_long": "Event confidence: LOW (baseline not robust)",
      "metrics": {
        "confidence": "LOW"
      }
    },
    {
      "code": "elevated_fwdvol",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-05-12",
      "interval_to": "2026-05-19",
      "strike": null,
      "target_key": "05-12\u219205-19",
      "message_short": "Elevated fwd vol (30.3%)",
      "message_long": "Forward volatility: 30.3% (threshold: 30%)",
      "metrics": {
        "fwd_vol": 0.30333049300894155,
        "threshold": 0.3
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  "summary": {
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    "fail_count": 0,
    "warn_count": 3,
    "info_count": 2
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      "usable_count": 7,
      "excluded": []
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    "expiry_quality_summary": {
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      "usable_count": 7,
      "excluded": [
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          "dte_days": 148,
          "reject_reason": "missing_quotes",
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          "why": "missing_quotes"
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        {
          "expiry_date": "2027-03-30",
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          "reject_reason": "insufficient_strikes",
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    "build_metadata": {
      "git_commit": "bdff5955",
      "build_timestamp": "2026-05-04T09:50:09.748324+00:00",
      "python_version": "3.13"
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    "request_echo": {
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      "sliding_windows_requested": false,
      "diagnostics_level": "lite",
      "tau_mode": "variance_time",
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      "event_windows_count": 0,
      "sliding_windows_exported": false,
      "ui_presets_exported": true,
      "ui_presets_events_count": 0,
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      "required_iv_tenors": []
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    "ui_limits": {
      "max_horizon_days": 56,
      "max_horizon_label": "8w_liquid",
      "min_horizon_days": 0,
      "tz": "Asia/Kolkata",
      "notes": "UI clamps horizon; avoid LEAPS/illiquid expiries beyond 8 weeks"
    },
    "ui_capabilities": {
      "schema_version": "ui_capabilities_v1",
      "generated_at_utc": "2026-05-04T09:50:09.748759+00:00",
      "source": "volstrats.analytics.ui_capabilities.build_ui_capabilities",
      "filter_policy": {
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        "version": "usable_expiries_v1"
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      "missing_reason": null,
      "features": {
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        "smile_density_plots": false,
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      "counts": {
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        "excluded_expiries": 2,
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        "issues_warn": 3
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    "ui_presets": {
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      "generated_at_utc": "2026-05-04T09:50:09.751577+00:00",
      "asof_iso": "2026-05-04T15:20:04.692689+05:30",
      "asof_source": "structure_summary.quote_context_dt",
      "horizon_days": 56,
      "tz": "Asia/Kolkata",
      "source": "market_calendar.list_upcoming_events",
      "id_namespace": "market_calendar",
      "id_format": "CATEGORY_YYYYMM",
      "events": []
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  }
}