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+          "severity": "OK"
+        },
+        {
+          "check": "output_format",
+          "pass": true,
+          "detail": "output format found",
+          "severity": "OK"
+        },
+        {
+          "check": "header_in_prompt",
+          "pass": true,
+          "detail": "no column headers found in prompt",
+          "severity": "OK"
+        },
+        {
+          "check": "hint_specificity",
+          "pass": true,
+          "detail": "clean",
+          "severity": "OK"
+        },
+        {
+          "check": "evidence_scope",
+          "pass": false,
+          "detail": "referenced=2 mentioned=1 missing=1 [Data Dump]",
+          "severity": "SOFT_WARN"
+        },
+        {
+          "check": "exemplar_consistency",
+          "pass": true,
+          "severity": "OK",
+          "detail": "checked 13 col groups"
+        },
+        {
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+          "pass": true,
+          "detail": "GT funcs: ['MONTH', 'SUM', 'SUMPRODUCT', 'TEXT']",
+          "severity": "OK"
+        },
+        {
+          "check": "unmatched_default_rule",
+          "pass": true,
+          "detail": "no default-rule phrase found in NL",
+          "severity": "OK"
+        },
+        {
+          "check": "volatile_function_freeze",
+          "pass": true,
+          "detail": "volatile_cells=0",
+          "severity": "OK"
+        },
+        {
+          "check": "direct_answer_leakage",
+          "pass": true,
+          "detail": "0 leaks out of 126 GT cells (0%)",
+          "severity": "OK"
+        }
+      ]
+    },
+    "pre_nl_local": {
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+      "local_label": "PENDING_NL",
+      "hard_fail_flags": [],
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+        "nl_risk": 0
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+      "total_non_none": 126,
+      "block_reasons": [],
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+          "details": []
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+        },
+        "gt_type_consistency": {
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+          },
+          "mixed": false
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+        "empty_gt": {
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+          "details": []
+        }
+      }
+    },
+    "src_chain": {
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+      "block_reasons": [],
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+          "pass": true,
+          "count": 0,
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+          "pass": true,
+          "count": 0,
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+          "count": 0,
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+        "circular_refs": {
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+          "cycle_cells": []
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+}

FormulaCascade_Benchmark_eval_200/T1_FRONTIER/internal/FCB-00799/ground_truth_full.json

@@ -0,0 +1,1136 @@
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+    "sheet": "Data Sheet",
+    "col": "Y",
+    "row": 17,
+    "formula": "=SUM(B17,D17,F17,H17,J17,L17,N17,P17,R17,T17,V17,X17)",
+    "cached_value": 0,
+    "pattern_id": "pf_0002"
+  },
+  {
+    "sheet": "Data Sheet",
+    "col": "Y",
+    "row": 18,
+    "formula": "=SUM(B18,D18,F18,H18,J18,L18,N18,P18,R18,T18,V18,X18)",
+    "cached_value": 0,
+    "pattern_id": "pf_0002"
+  },
+  {
+    "sheet": "Data Sheet",
+    "col": "Y",
+    "row": 19,
+    "formula": "=SUM(B19,D19,F19,H19,J19,L19,N19,P19,R19,T19,V19,X19)",
+    "cached_value": 0,
+    "pattern_id": "pf_0002"
+  },
+  {
+    "sheet": "Data Sheet",
+    "col": "Y",
+    "row": 20,
+    "formula": "=SUM(B20,D20,F20,H20,J20,L20,N20,P20,R20,T20,V20,X20)",
+    "cached_value": 0,
+    "pattern_id": "pf_0002"
+  },
+  {
+    "sheet": "Data Sheet",
+    "col": "Y",
+    "row": 21,
+    "formula": "=SUM(B21,D21,F21,H21,J21,L21,N21,P21,R21,T21,V21,X21)",
+    "cached_value": 0,
+    "pattern_id": "pf_0002"
+  }
+]

FormulaCascade_Benchmark_eval_200/T1_FRONTIER/internal/FCB-00799/release_qc.json

@@ -0,0 +1,58 @@
+{
+  "binary": true,
+  "binary_reason": "CORRECT — mask boundary is clean, cells are real, GT appears consistent, and the dependency chain is reconstructible though the NL under-specifies the Data Dump link.",
+  "D1": {
+    "score": 5,
+    "reason": "All 126 contract cells are truly masked, with no contract cells left unmasked and no extra cells removed. The target/prerequisite ranges are within the actual Data Sheet range, so there are no phantom cells. Formula-cache loss outside the contract is explicitly an openpyxl artifact and not extra masking. Visible exemplars/pattern clues do not appear trivially copyable for the whole chain."
+  },
+  "D2": {
+    "score": 5,
+    "reason": "The layer-1 formulas in Y sum the monthly Total columns B,D,F,H,J,L,N,P,R,T,V,X for the same row, matching the End of Year Totals role. Cached values shown are consistent with those formulas, including zero totals for the LOS-style lower block where monthly inputs are blank. Formulas are deterministic and have no volatile or ambiguous components."
+  },
+  "D3": {
+    "score": 4,
+    "reason": "The NL clearly identifies the sheet and exact target ranges Y2:Y10 and Y13:Y21, and explains that related section figures must be completed before year-end totals. However, it is somewhat vague about the cross-sheet Data Dump dependency and does not explicitly state how the monthly Total columns should be computed."
+  },
+  "D4": {
+    "score": 4,
+    "reason": "Using only mask_last plus the prompt, the final Y formulas are strongly suggested by the repeated monthly Total columns and the 'End of Year Totals' header. The prerequisite monthly Total columns have visible structural evidence from month headers, repeated category labels, the Data Dump sheet, and preserved non-contract formula/exemplar information, so the chain is reconstructible with effort. The main gap is that the NL does not explicitly mention Data Dump, so the solver must infer the cross-sheet source from workbook structure.",
+    "d4_type": "ok"
+  },
+  "D5": {
+    "score": 4,
+    "reason": "The source workbook appears structurally sound: no reported chain errors, external-cell errors, circularity, or broken formulas. Data and formulas are consistent enough for the task. Minor quality issues include imperfect/misspelled headers such as 'Geograhpy' and somewhat sparse header labeling, but these do not invalidate the spreadsheet."
+  },
+  "D6": {
+    "score": 4,
+    "reason": "The NL sounds like a plausible workplace request to finalize an admissions/discharge report and avoids benchmark jargon. It is a bit generic and indirect, especially around the related workbook figures, but remains natural."
+  },
+  "total": 26,
+  "verdict": "RELEASE",
+  "verdict_reason": "High-quality task overall: clean mask, correct GT, real cross-sheet dependency, and sufficient workbook evidence. The only notable weakness is that the NL does not explicitly name Data Dump, but this is a minor clarity issue rather than a solvability defect.",
+  "frontier_hardness": {
+    "score": 4,
+    "reason": "This is hard for a frontier model because it requires reconstructing many masked monthly total formulas, then using them to compute year-end totals, with cross-sheet reasoning against Data Dump and many repeated patterns. It is not trivially copyable, but the evidence is present.",
+    "fail_reason": "cross_sheet_multi_hop",
+    "is_valid_hardness": true
+  },
+  "_prompt_chars": 163146,
+  "_timing_load_workbooks": 0.42,
+  "_timing_context": 0.02,
+  "_timing_api": 76.84,
+  "local_difficulty": {
+    "difficulty_score": 80.0,
+    "difficulty": "hard",
+    "depth": 2,
+    "total_masked": 126,
+    "is_cross_sheet": true,
+    "unique_patterns": 13,
+    "avg_complexity": 14,
+    "cross_refs": 432,
+    "visible_exemplar_ratio": 0.1
+  },
+  "task_id": "cross_sheet__dag_f13b4842f9fd",
+  "elapsed": 77.3,
+  "publish_decision": "YES",
+  "release_tier": "FRONTIER_HARD",
+  "hard_block_reasons": []
+}

FormulaCascade_Benchmark_eval_200/T1_FRONTIER/internal/FCB-00799/target_contract.json

@@ -0,0 +1,296 @@
+{
+  "task_id": "cross_sheet__dag_f13b4842f9fd",
+  "category": "cross_sheet",
+  "depth": 2,
+  "final_target": {
+    "regions": [
+      {
+        "sheet": "Data Sheet",
+        "column": "Y",
+        "column_header": "End of Year Totals",
+        "cell_range": "Y2:Y10, Y13:Y21",
+        "cell_count": 18,
+        "rows": [
+          2,
+          3,
+          4,
+          5,
+          6,
+          7,
+          8,
+          9,
+          10,
+          13,
+          14,
+          15,
+          16,
+          17,
+          18,
+          19,
+          20,
+          21
+        ],
+        "first_row_label": "Complete",
+        "last_row_label": "Partial"
+      }
+    ],
+    "cell_count": 18,
+    "formula_families": [
+      "aggregation"
+    ]
+  },
+  "prerequisite_steps": [
+    {
+      "layer": 2,
+      "regions": [
+        {
+          "sheet": "Data Sheet",
+          "column": "B",
+          "column_header": "Total",
+          "cell_range": "B2:B10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "D",
+          "column_header": "Total",
+          "cell_range": "D2:D10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "F",
+          "column_header": "Total",
+          "cell_range": "F2:F10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "H",
+          "column_header": "Total",
+          "cell_range": "H2:H10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "J",
+          "column_header": "Total",
+          "cell_range": "J2:J10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "L",
+          "column_header": "Total",
+          "cell_range": "L2:L10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "N",
+          "column_header": "Total",
+          "cell_range": "N2:N10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "P",
+          "column_header": "Total",
+          "cell_range": "P2:P10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "R",
+          "column_header": "Total",
+          "cell_range": "R2:R10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "T",
+          "column_header": "Total",
+          "cell_range": "T2:T10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "V",
+          "column_header": "Total",
+          "cell_range": "V2:V10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        },
+        {
+          "sheet": "Data Sheet",
+          "column": "X",
+          "column_header": "Total",
+          "cell_range": "X2:X10",
+          "cell_count": 9,
+          "rows": [
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "Complete",
+          "last_row_label": "Partial"
+        }
+      ],
+      "cell_count": 108
+    }
+  ],
+  "total_prerequisite_cells": 108,
+  "total_masked_cells": 126,
+  "ratio_total_vs_final": 7.0,
+  "sheets_involved": [
+    "Data Sheet"
+  ]
+}