{
  "schema_version": "fwdvar_diagnostics_v4",
  "issues": [
    {
      "code": "sparse_chain",
      "scope": "expiry",
      "severity": "INFO",
      "expiry_dt": "2026-05-12",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2026-05-12",
      "message_short": "Sparse chain",
      "message_long": "Option chain is sparse (fewer strikes than normal)",
      "metrics": {
        "n_pairs_atm": 3,
        "min_pairs_required": 5
      }
    },
    {
      "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": "2026-04-21",
      "interval_to": "2026-04-28",
      "strike": null,
      "target_key": "04-21\u219204-28",
      "message_short": "LOW confidence",
      "message_long": "Event confidence: LOW (baseline not robust)",
      "metrics": {
        "confidence": "LOW"
      }
    },
    {
      "code": "baseline_fallback",
      "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": "Baseline fallback",
      "message_long": "Baseline quality: FALLBACK (edge case)",
      "metrics": {
        "baseline_n": 1
      }
    },
    {
      "code": "low_source",
      "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": "LOW confidence",
      "message_long": "Event confidence: LOW (baseline not robust)",
      "metrics": {
        "confidence": "LOW"
      }
    },
    {
      "code": "baseline_fallback",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-05-05",
      "interval_to": "2026-05-12",
      "strike": null,
      "target_key": "05-05\u219205-12",
      "message_short": "Baseline fallback",
      "message_long": "Baseline quality: FALLBACK (edge case)",
      "metrics": {
        "baseline_n": 0
      }
    },
    {
      "code": "low_source",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-05-12",
      "interval_to": "2026-05-26",
      "strike": null,
      "target_key": "05-12\u219205-26",
      "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": "2026-04-13",
      "interval_to": "2026-04-21",
      "strike": null,
      "target_key": "04-13\u219204-21",
      "message_short": "Elevated fwd vol (33.7%)",
      "message_long": "Forward volatility: 33.7% (threshold: 30%)",
      "metrics": {
        "fwd_vol": 0.3372250035985883,
        "threshold": 0.3
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    },
    {
      "code": "elevated_fwdvol",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-04-21",
      "interval_to": "2026-04-28",
      "strike": null,
      "target_key": "04-21\u219204-28",
      "message_short": "Elevated fwd vol (31.1%)",
      "message_long": "Forward volatility: 31.1% (threshold: 30%)",
      "metrics": {
        "fwd_vol": 0.3112045574427194,
        "threshold": 0.3
      }
    },
    {
      "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 (31.2%)",
      "message_long": "Forward volatility: 31.2% (threshold: 30%)",
      "metrics": {
        "fwd_vol": 0.3124325090439082,
        "threshold": 0.3
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    },
    {
      "code": "elevated_fwdvol",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-05-05",
      "interval_to": "2026-05-12",
      "strike": null,
      "target_key": "05-05\u219205-12",
      "message_short": "Elevated fwd vol (30.4%)",
      "message_long": "Forward volatility: 30.4% (threshold: 30%)",
      "metrics": {
        "fwd_vol": 0.30399481253842103,
        "threshold": 0.3
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    },
    {
      "code": "low_coverage",
      "scope": "run",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "run",
      "message_short": "Low coverage (34%)",
      "message_long": "Weighted-mid coverage: 34.4% (threshold: 50%)",
      "metrics": {
        "avg_coverage": 34.375,
        "threshold": 50.0
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    }
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  "summary": {
    "total": 14,
    "fail_count": 0,
    "warn_count": 11,
    "info_count": 3
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      "usable_count": 8,
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    "expiry_quality_summary": {
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    "build_metadata": {
      "git_commit": "a8ecda85",
      "build_timestamp": "2026-04-10T04:00:10.039567+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": {
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      "generated_at_utc": "2026-04-10T04:00:10.039966+00:00",
      "source": "volstrats.analytics.ui_capabilities.build_ui_capabilities",
      "filter_policy": {
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      "features": {
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        "smile_density_plots": false,
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      "counts": {
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        "issues_warn": 11
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    "ui_presets": {
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      "generated_at_utc": "2026-04-10T04:00:10.043714+00:00",
      "asof_iso": "2026-04-10T09:30:03.981007+05:30",
      "asof_source": "structure_summary.quote_context_dt",
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      "source": "market_calendar.list_upcoming_events",
      "id_namespace": "market_calendar",
      "id_format": "CATEGORY_YYYYMM",
      "events": []
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  }
}