{
  "schema_version": "fwdvar_diagnostics_v4",
  "issues": [
    {
      "code": "rejected",
      "scope": "expiry",
      "severity": "INFO",
      "expiry_dt": "2026-05-12",
      "interval_from": null,
      "interval_to": null,
      "strike": null,
      "target_key": "2026-05-12",
      "message_short": "Rejected: iv_garbage",
      "message_long": "Expiry rejected: iv_garbage",
      "metrics": {
        "reject_reason": "iv_garbage"
      }
    },
    {
      "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": "baseline_fallback",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-05-05",
      "interval_to": "2026-05-26",
      "strike": null,
      "target_key": "05-05\u219205-26",
      "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": "2026-06-30",
      "interval_to": "2026-12-29",
      "strike": null,
      "target_key": "06-30\u219212-29",
      "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 (35.1%)",
      "message_long": "Forward volatility: 35.1% (threshold: 30%)",
      "metrics": {
        "fwd_vol": 0.35099253487634363,
        "threshold": 0.3
      }
    },
    {
      "code": "elevated_fwdvol",
      "scope": "interval",
      "severity": "WARN",
      "expiry_dt": null,
      "interval_from": "2026-04-21",
      "interval_to": "2026-05-05",
      "strike": null,
      "target_key": "04-21\u219205-05",
      "message_short": "Elevated fwd vol (31.1%)",
      "message_long": "Forward volatility: 31.1% (threshold: 30%)",
      "metrics": {
        "fwd_vol": 0.3110499142876903,
        "threshold": 0.3
      }
    }
  ],
  "summary": {
    "total": 8,
    "fail_count": 0,
    "warn_count": 5,
    "info_count": 3
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        "tau_eff": 0.022122559949678742,
        "tau_cal": 0.07186846550586863,
        "tau_ratio": 3.248650502895904
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      "back_slope_pct": -3.2165810275645192,
      "max_fwd_vol_pct": 35.099253487634364,
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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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    "forward_volatility_matrix": {
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      "status": "available",
      "expiry_filter_policy_version": "usable_expiries_v1",
      "expiry_dates": [
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        "2026-04-21",
        "2026-05-05",
        "2026-05-26",
        "2026-06-30",
        "2026-12-29"
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      "clip": {
        "method": "percentile",
        "p_lo": 5,
        "p_hi": 95,
        "vmin": 22.530650006749728,
        "vmax": 33.36366861084913
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      "usable_count": 6,
      "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": 6,
      "excluded": [
        {
          "expiry_date": "2026-05-12",
          "dte_days": 33,
          "reject_reason": "iv_garbage",
          "accept_tier": null,
          "why": "iv_garbage"
        },
        {
          "expiry_date": "2026-09-29",
          "dte_days": 173,
          "reject_reason": "missing_quotes",
          "accept_tier": null,
          "why": "missing_quotes"
        },
        {
          "expiry_date": "2027-03-30",
          "dte_days": 355,
          "reject_reason": "insufficient_strikes",
          "accept_tier": null,
          "why": "insufficient_strikes"
        }
      ]
    },
    "build_metadata": {
      "git_commit": "8930e1e2",
      "build_timestamp": "2026-04-09T04:00:09.912380+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": 1,
      "ui_presets_missing_reason": null,
      "required_iv_tenors": []
    },
    "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": "2026-04-09T04:00:09.921446+00:00",
      "source": "volstrats.analytics.ui_capabilities.build_ui_capabilities",
      "filter_policy": {
        "name": "UI_GRADE",
        "version": "usable_expiries_v1"
      },
      "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": 6,
        "excluded_expiries": 3,
        "neg_cells": 0,
        "issues_fail": 0,
        "issues_warn": 5
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    },
    "ui_presets": {
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      "generated_at_utc": "2026-04-09T04:00:09.924630+00:00",
      "asof_iso": "2026-04-09T09:30:03.712952+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": [
        {
          "id": "RBI_MPC_202604",
          "name": "RBI MPC \u2013 Apr 2026 policy",
          "start_iso": "2026-04-09T09:15:00+05:30",
          "end_iso": "2026-04-09T15:30:00+05:30",
          "category": "macro",
          "tags": [
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          ],
          "certainty": "scheduled",
          "template": "full_session",
          "importance": null
        }
      ]
    }
  }
}