{
  "schema_version": "fwdvar_diagnostics_v4",
  "issues": [
    {
      "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": "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": "elevated_fwdvol",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-04-28",
      "interval_to": "2026-05-05",
      "strike": null,
      "target_key": "04-28\u219205-05",
      "message_short": "Elevated fwd vol (31.3%)",
      "message_long": "Forward volatility: 31.3% (threshold: 30%)",
      "metrics": {
        "fwd_vol": 0.3129222301976887,
        "threshold": 0.3
      }
    }
  ],
  "summary": {
    "total": 3,
    "fail_count": 0,
    "warn_count": 1,
    "info_count": 2
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        "tau_eff": 0.007304338942814004,
        "tau_cal": 0.02218782680847086,
        "tau_ratio": 3.037622840640385
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        "expiry_date": "2026-05-19",
        "tau_eff": 0.024980231173294506,
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        "tau_ratio": 3.189830101469637
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        "pct_cal": 15.216115491414467,
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      "back_slope_pct": -3.0913312680614204,
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        "end_dte": 15
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      "neg_interval_count": 0,
      "clock_primary": "variance_time",
      "clock_secondary": "calendar",
      "vt_vintage": "202603",
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      "effective_quote_policy": "weighted_mid",
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      "fly_25d": null,
      "put_iv_25d": null,
      "call_iv_25d": null,
      "rr_fly_diagnostics": null
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      "status": "available",
      "expiry_filter_policy_version": "usable_expiries_v1",
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      "clip": {
        "method": "percentile",
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        "p_hi": 95,
        "vmin": 22.76933902808066,
        "vmax": 29.404459700936247
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      "usable_count": 7,
      "excluded": []
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    "expiry_quality_summary": {
      "schema_version": "expiry_quality_summary_v1",
      "filter_policy_version": "usable_expiries_v1",
      "total_count": 9,
      "usable_count": 7,
      "excluded": [
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          "expiry_date": "2026-09-29",
          "dte_days": 162,
          "reject_reason": "missing_quotes",
          "accept_tier": null,
          "why": "missing_quotes"
        },
        {
          "expiry_date": "2027-03-30",
          "dte_days": 344,
          "reject_reason": "insufficient_strikes",
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          "why": "insufficient_strikes"
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      ]
    },
    "build_metadata": {
      "git_commit": "d2ce0423",
      "build_timestamp": "2026-04-20T07:30:11.089864+00:00",
      "python_version": "3.13"
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    "request_echo": {
      "event_windows_requested": false,
      "sliding_windows_requested": false,
      "diagnostics_level": "lite",
      "tau_mode": "variance_time",
      "event_windows_exported": false,
      "event_windows_count": 0,
      "sliding_windows_exported": false,
      "ui_presets_exported": true,
      "ui_presets_events_count": 0,
      "ui_presets_missing_reason": null,
      "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": "2026-04-20T07:30:11.090260+00:00",
      "source": "volstrats.analytics.ui_capabilities.build_ui_capabilities",
      "filter_policy": {
        "name": "UI_GRADE",
        "version": "usable_expiries_v1"
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      "missing_reason": null,
      "features": {
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        "quote_cards_html": false,
        "event_window_tool": false,
        "sliding_windows": false,
        "smile_density_plots": false,
        "chain_snapshots": false,
        "carry_data": true
      },
      "counts": {
        "usable_expiries": 7,
        "excluded_expiries": 2,
        "neg_cells": 0,
        "issues_fail": 0,
        "issues_warn": 1
      }
    },
    "ui_presets": {
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      "generated_at_utc": "2026-04-20T07:30:11.093984+00:00",
      "asof_iso": "2026-04-20T13:00:05.436709+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": []
    }
  }
}