diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/audit.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/audit.json
new file mode 100644
index 0000000000000000000000000000000000000000..cd07500c8c43ad44ede681beda118b7984e4cea1
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/audit.json
@@ -0,0 +1,420 @@
+{
+  "gate": {
+    "pre_nl_gate": {
+      "gate_label": "GATE_PASS",
+      "gate_pass": true,
+      "hard_fails": 0,
+      "warns": 0,
+      "checks": [
+        {
+          "check": "final_target_gate",
+          "pass": true,
+          "detail": "final_target has 60 cells"
+        },
+        {
+          "check": "header_grounding",
+          "pass": true,
+          "severity": "pass",
+          "detail": "1/1 final regions have column_header"
+        },
+        {
+          "check": "mask_consistency",
+          "pass": true,
+          "detail": "mask_last=10331B, src=15582B"
+        },
+        {
+          "check": "dirty_family",
+          "pass": true,
+          "detail": "0 dirty cells"
+        },
+        {
+          "check": "ratio_gate",
+          "pass": true,
+          "detail": "ratio=1.1 (total=69, final=60)"
+        },
+        {
+          "check": "dedup_gate",
+          "pass": true,
+          "detail": "0 duplicate cells across layers"
+        },
+        {
+          "check": "gt_uniqueness",
+          "pass": true,
+          "detail": "69 unique values across 69 cells"
+        },
+        {
+          "check": "tail_artifact",
+          "pass": true,
+          "detail": "0 bad values"
+        },
+        {
+          "check": "unrecoverable_leaf",
+          "pass": true,
+          "detail": "clean",
+          "hidden_const_cells": []
+        },
+        {
+          "check": "adjacent_column_leak",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "header_name_accuracy",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "duplicate_lookup_tie_break",
+          "pass": true,
+          "detail": "no lookup formulas"
+        },
+        {
+          "check": "src_chain_integrity",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean",
+          "sub_checks": {
+            "error_cells": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "external_refs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "volatile_funcs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "missing_sheets": {
+              "pass": true,
+              "count": 0,
+              "sheets": []
+            },
+            "circular_refs": {
+              "pass": true,
+              "cycle_cells": []
+            }
+          }
+        },
+        {
+          "check": "uniqueness_deep",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean"
+        }
+      ]
+    },
+    "post_nl_validate": {
+      "validate_label": "CLEAN",
+      "validate_pass": true,
+      "hard_fails": 0,
+      "soft_warns": 0,
+      "checks": [
+        {
+          "check": "cell_range_match",
+          "pass": true,
+          "detail": "contract=19, prompt=10, missing=0",
+          "missing_ranges": [],
+          "severity": "OK"
+        },
+        {
+          "check": "cell_count_match",
+          "pass": true,
+          "detail": "no explicit total found; skipping (natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "step_count_match",
+          "pass": true,
+          "detail": "contract=1, no explicit steps found (v5 natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "sheet_name_match",
+          "pass": true,
+          "detail": "contract=['JonMckay-Mon10'], missing=[]",
+          "severity": "OK"
+        },
+        {
+          "check": "no_formula_leak",
+          "pass": true,
+          "detail": "0 formula leaks",
+          "severity": "OK"
+        },
+        {
+          "check": "no_value_leak",
+          "pass": true,
+          "detail": "0 value leaks out of 60 GT cells",
+          "severity": "OK"
+        },
+        {
+          "check": "final_target_first",
+          "pass": true,
+          "detail": "no explicit final target marker (natural format)",
+          "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": true,
+          "detail": "no cross-sheet refs in GT",
+          "severity": "OK"
+        },
+        {
+          "check": "exemplar_consistency",
+          "pass": true,
+          "severity": "OK",
+          "detail": "checked 1 col groups"
+        },
+        {
+          "check": "nl_gt_operation_consistency",
+          "pass": true,
+          "detail": "GT funcs: []",
+          "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 69 GT cells (0%)",
+          "severity": "OK"
+        }
+      ]
+    },
+    "pre_nl_local": {
+      "local_total": 55,
+      "local_label": "PENDING_NL",
+      "hard_fail_flags": [],
+      "warnings": [
+        "nl_missing"
+      ],
+      "local_subscores": {
+        "family_clean": 25,
+        "target_integrity": 15,
+        "taxonomy": 10,
+        "semantic_signal": 5,
+        "nl_schema": 0,
+        "target_alignment": 0,
+        "business_specificity": 0,
+        "nl_risk": 0
+      }
+    }
+  },
+  "verify": {
+    "uniqueness": {
+      "total_gt_cells": 69,
+      "total_non_none": 69,
+      "block_reasons": [],
+      "warnings": [],
+      "checks": {
+        "rank_tie_risk": {
+          "rank_cells": 0,
+          "tie_issues": 0,
+          "details": []
+        },
+        "trivial_gt": {
+          "issues": []
+        },
+        "gt_type_consistency": {
+          "types": {
+            "str": 69
+          },
+          "mixed": false
+        },
+        "empty_gt": {
+          "count": 0,
+          "details": []
+        }
+      }
+    },
+    "src_chain": {
+      "hard_block": false,
+      "block_reasons": [],
+      "checks": {
+        "error_cells": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "external_refs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "volatile_funcs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "missing_sheets": {
+          "pass": true,
+          "count": 0,
+          "sheets": []
+        },
+        "circular_refs": {
+          "pass": true,
+          "cycle_cells": []
+        }
+      },
+      "required_chain_scope": {
+        "external_ref_in_required_chain": 0,
+        "external_ref_in_other": 0,
+        "error_cells_in_required_chain": 0,
+        "error_cells_in_other": 0,
+        "required_chain_cells": 69
+      }
+    },
+    "solver_visibility": {
+      "contract_cells": 69,
+      "total_masked": 69,
+      "total_visible": 386,
+      "depth": 2,
+      "block_reasons": [],
+      "warnings": [],
+      "checks": {
+        "broken_chains": {
+          "count": 0,
+          "checked": 69,
+          "details": []
+        },
+        "orphan_masks": {
+          "count": 0,
+          "details": []
+        },
+        "self_contained": {
+          "missing_sheets": []
+        }
+      }
+    },
+    "exemplar": {
+      "soft_block": true,
+      "block_reasons": [
+        "zero_exemplar:3_patterns"
+      ],
+      "checks": {
+        "pattern_coverage": {
+          "pass": false,
+          "total_gt_patterns": 3,
+          "total_src_patterns": 7,
+          "zero_exemplar_count": 3,
+          "low_exemplar_count": 0
+        },
+        "zero_exemplar_patterns": {
+          "pass": false,
+          "patterns": [
+            {
+              "pattern": "=3+REF",
+              "total_in_src": 1,
+              "sample_formula": "=3+B32"
+            },
+            {
+              "pattern": "=1+REF",
+              "total_in_src": 65,
+              "sample_formula": "=1+B15"
+            },
+            {
+              "pattern": "=2+REF",
+              "total_in_src": 3,
+              "sample_formula": "=2+B56"
+            }
+          ]
+        },
+        "low_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "func_coverage": {
+          "arithmetic": {
+            "total_masked": 69,
+            "visible_exemplars": 28
+          }
+        }
+      }
+    },
+    "shortcut": {
+      "shortcut_risk": 0.0,
+      "flags": []
+    },
+    "release_audit": {
+      "surface_single_sheet": true,
+      "surface_sheets": [
+        "JonMckay-Mon10"
+      ],
+      "cross_sheet_actual": false,
+      "cross_sheet_ref_count": 0,
+      "referenced_sheets": [],
+      "target_shape": "template_column_fill",
+      "layer_sizes": [
+        60,
+        9
+      ],
+      "mask_last_total_cells": 69,
+      "layer_growth_ratios": [
+        0.15
+      ],
+      "pattern_dominance_ratio": 0.8696,
+      "visible_clone_regions": 0,
+      "nearby_visible_clone_regions": 0,
+      "nearby_visible_clone_rows": 0,
+      "nearby_visible_clone_ratio": 0.0,
+      "promptability_score": 0.88,
+      "release_reasons": [
+        "pattern_dominance_high"
+      ],
+      "release_verdict": "KEEP_WITH_FIXES"
+    }
+  },
+  "difficulty": {
+    "task_id": "single_sheet__dag_4bb26e0e64d1",
+    "difficulty_score": 36.9,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 69,
+    "is_cross_sheet": false,
+    "unique_patterns": 2,
+    "avg_complexity": 3.0,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.277,
+    "score_breakdown": {
+      "depth": 7,
+      "cross_sheet": 0,
+      "cell_count": 12.2,
+      "patterns": 6,
+      "complexity": 4.5,
+      "cross_refs": 0,
+      "vis_penalty": 7.2
+    }
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/ground_truth_full.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/ground_truth_full.json
new file mode 100644
index 0000000000000000000000000000000000000000..62afef87dedc8c68854a060b6f75f400f1d4b1d2
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/ground_truth_full.json
@@ -0,0 +1,623 @@
+[
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 16,
+    "formula": "=1+B15",
+    "cached_value": "2001-06-13 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 17,
+    "formula": "=1+B16",
+    "cached_value": "2001-06-14 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 18,
+    "formula": "=1+B17",
+    "cached_value": "2001-06-15 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 19,
+    "formula": "=1+B18",
+    "cached_value": "2001-06-16 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 20,
+    "formula": "=1+B19",
+    "cached_value": "2001-06-17 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 21,
+    "formula": "=1+B20",
+    "cached_value": "2001-06-18 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 29,
+    "formula": "=1+B28",
+    "cached_value": "2001-06-06 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 30,
+    "formula": "=1+B29",
+    "cached_value": "2001-06-07 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 31,
+    "formula": "=1+B30",
+    "cached_value": "2001-06-08 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 32,
+    "formula": "=1+B31",
+    "cached_value": "2001-06-09 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 33,
+    "formula": "=1+B32",
+    "cached_value": "2001-06-10 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 34,
+    "formula": "=1+B33",
+    "cached_value": "2001-06-11 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 40,
+    "formula": "=1+B39",
+    "cached_value": "2001-05-30 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 41,
+    "formula": "=1+B40",
+    "cached_value": "2001-05-31 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 42,
+    "formula": "=1+B41",
+    "cached_value": "2001-06-01 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 43,
+    "formula": "=1+B42",
+    "cached_value": "2001-06-02 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 44,
+    "formula": "=1+B43",
+    "cached_value": "2001-06-03 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 45,
+    "formula": "=1+B44",
+    "cached_value": "2001-06-04 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 52,
+    "formula": "=1+B51",
+    "cached_value": "2001-05-23 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 53,
+    "formula": "=1+B52",
+    "cached_value": "2001-05-24 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 54,
+    "formula": "=1+B53",
+    "cached_value": "2001-05-25 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 55,
+    "formula": "=1+B54",
+    "cached_value": "2001-05-26 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 56,
+    "formula": "=1+B55",
+    "cached_value": "2001-05-27 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 57,
+    "formula": "=1+B56",
+    "cached_value": "2001-05-28 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 64,
+    "formula": "=1+B63",
+    "cached_value": "2001-05-16 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 65,
+    "formula": "=1+B64",
+    "cached_value": "2001-05-17 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 66,
+    "formula": "=1+B65",
+    "cached_value": "2001-05-18 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 67,
+    "formula": "=1+B66",
+    "cached_value": "2001-05-19 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 68,
+    "formula": "=1+B67",
+    "cached_value": "2001-05-20 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 69,
+    "formula": "=1+B68",
+    "cached_value": "2001-05-21 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 76,
+    "formula": "=1+B75",
+    "cached_value": "2001-05-09 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 77,
+    "formula": "=1+B76",
+    "cached_value": "2001-05-10 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 78,
+    "formula": "=1+B77",
+    "cached_value": "2001-05-11 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 79,
+    "formula": "=1+B78",
+    "cached_value": "2001-05-12 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 80,
+    "formula": "=1+B79",
+    "cached_value": "2001-05-13 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 81,
+    "formula": "=1+B80",
+    "cached_value": "2001-05-14 00:00:00",
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 87,
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diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/ground_truth_target.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/ground_truth_target.json
new file mode 100644
index 0000000000000000000000000000000000000000..aa16c3332019b690bc9e04f9f0ecb52f2da9911c
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/ground_truth_target.json
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+    "row": 112,
+    "formula": "=1+B111",
+    "cached_value": "2001-04-19 00:00:00",
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 113,
+    "formula": "=1+B112",
+    "cached_value": "2001-04-20 00:00:00",
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 114,
+    "formula": "=1+B113",
+    "cached_value": "2001-04-21 00:00:00",
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 115,
+    "formula": "=1+B114",
+    "cached_value": "2001-04-22 00:00:00",
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 116,
+    "formula": "=1+B115",
+    "cached_value": "2001-04-23 00:00:00",
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 122,
+    "formula": "=1+B121",
+    "cached_value": "2001-04-11 00:00:00",
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 123,
+    "formula": "=1+B122",
+    "cached_value": "2001-04-12 00:00:00",
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 124,
+    "formula": "=1+B123",
+    "cached_value": "2001-04-13 00:00:00",
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 125,
+    "formula": "=1+B124",
+    "cached_value": "2001-04-14 00:00:00",
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 126,
+    "formula": "=1+B125",
+    "cached_value": "2001-04-15 00:00:00",
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "JonMckay-Mon10",
+    "col": "B",
+    "row": 127,
+    "formula": "=1+B126",
+    "cached_value": "2001-04-16 00:00:00",
+    "pattern_id": "pf_0000"
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/mask_last.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/mask_last.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..ddb8eecc944ea3387382d9972f4d21f1390ed4d7
Binary files /dev/null and b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/mask_last.xlsx differ
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/nl_task.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/nl_task.json
new file mode 100644
index 0000000000000000000000000000000000000000..cf342b5a96d38ee0463a85c7f1369789847b99c0
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/nl_task.json
@@ -0,0 +1,26 @@
+{
+  "task_id": "single_sheet__dag_4bb26e0e64d1",
+  "prompt_en": "On the JonMckay-Mon10 sheet, this workbook looks like a running log or training estimate page, with visible labels such as 10k PR, Set 2 years ago, Age, Resting HR, estimate, and the note about having no problems and increasing the mileage. The Date column is missing entries in several blocks of the log, and those dates anchor the related rows before the rest of the row information is meaningful.\n\nPlease fill in the blank Date cells on JonMckay-Mon10 in column B: B16:B21, B29:B34, B40:B45, B52:B57, B64:B69, B76:B81, B87:B92, B98:B103, B111:B116, and B122:B127. When you’re done, save the completed file as an .xlsx file.",
+  "prompt_cn": "在 JonMckay-Mon10 工作表中，这份工作簿看起来像是一份跑步日志或训练估算页面，里面能看到 10k PR、Set 2 years ago、Age、Resting HR、estimate，以及关于没有问题并增加里程的说明。Date 列有几段日志的日期缺失，而这些日期是对应行内容成立的基础，日期补齐后相关行的信息才完整。\n\n请补全 JonMckay-Mon10 工作表 B 列 Date 中的空白单元格：B16:B21、B29:B34、B40:B45、B52:B57、B64:B69、B76:B81、B87:B92、B98:B103、B111:B116 和 B122:B127。完成后，请将文件保存为 .xlsx 格式。",
+  "quality_notes": "The prompt frames the workbook using only visible sheet names and labels, identifies the Date column and exact ranges to fill, mentions the natural row-level dependency without explaining any method, and avoids formulas or operational hints.",
+  "post_check_issues": [],
+  "prompt_mode": "minimal",
+  "hint_leakage": {
+    "score": 25,
+    "level": "medium",
+    "max_possible": 100,
+    "dimensions": {
+      "operation_words": 0,
+      "cell_range_density": 25,
+      "step_by_step": 0,
+      "column_operation_mapping": 0,
+      "formula_pattern_hints": 0
+    },
+    "operation_words_found": [],
+    "cell_ranges_found": 10
+  },
+  "version": "v7",
+  "model": "gpt-5.5",
+  "elapsed": 15.6,
+  "attempt": 1
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/release_qc.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/release_qc.json
new file mode 100644
index 0000000000000000000000000000000000000000..abc4fa2276dbf01f03fe45ead92f02ff6efc6397
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/release_qc.json
@@ -0,0 +1,58 @@
+{
+  "binary": true,
+  "binary_reason": "CORRECT: the mask is clean, cells are real, GT formulas are consistent, and the Date sequence is reconstructible from visible day/week structure and the visible seed date.",
+  "D1": {
+    "score": 5,
+    "reason": "All 69 contract cells are truly masked, there are no extra masked cells, and all referenced cells are within the 130-row sheet range. The mask boundary is clean. There is no trivial visible same-column formula copy leakage; the solver must infer the date chain from structure rather than simply copying formulas."
+  },
+  "D2": {
+    "score": 5,
+    "reason": "The layer-1 GT formulas follow the deterministic pattern of each date being one day after the previous row in the same block, e.g. B16=1+B15, B17=1+B16, etc. The cached values shown are consistent with those formulas and with the visible date chronology anchored at B121."
+  },
+  "D3": {
+    "score": 5,
+    "reason": "The NL description clearly identifies the sheet, the Date column, and the exact final target ranges to fill. It is understandable and unambiguous for the requested final cells."
+  },
+  "D4": {
+    "score": 4,
+    "reason": "Using only mask_last.xlsx and the NL prompt, the task is solvable. The visible seed date B121=2001-04-10, the visible Day column Tue-Mon pattern, and the visible week/block layout provide enough evidence to reconstruct the missing Date values upward through the weekly running-log blocks. The only minor gap is that prerequisite anchor dates such as B110, B97, etc. are also blank and not explicitly requested in the NL, so the solver must infer that these Tuesday anchors continue the weekly sequence before filling the listed cells.",
+    "d4_type": "ok"
+  },
+  "D5": {
+    "score": 5,
+    "reason": "The source sheet appears structurally sound: formulas are deterministic, no circular or broken references are indicated, headers and repeated weekly blocks are meaningful, and the date/cached-value chronology is coherent."
+  },
+  "D6": {
+    "score": 5,
+    "reason": "The prompt sounds like a natural spreadsheet completion request and avoids benchmark-specific jargon. It gives contextual framing and a practical instruction to fill the missing Date cells."
+  },
+  "total": 29,
+  "verdict": "RELEASE",
+  "verdict_reason": "High-quality task. The masking is clean, GT is correct, and the evidence in the visible workbook is sufficient to reconstruct the date chain. Minor added reasoning is needed for the masked anchor dates, but this is consistent with the chain-masking design.",
+  "frontier_hardness": {
+    "score": 2,
+    "reason": "This is easy for a frontier model: there is one simple date-increment pattern, no cross-sheet reasoning, no hidden constants beyond the visible seed date, and the Day column/week structure strongly constrains the answer.",
+    "fail_reason": "easy",
+    "is_valid_hardness": false
+  },
+  "_prompt_chars": 74820,
+  "_timing_load_workbooks": 0.03,
+  "_timing_context": 0.01,
+  "_timing_api": 75.69,
+  "local_difficulty": {
+    "difficulty_score": 33.9,
+    "difficulty": "easy",
+    "depth": 2,
+    "total_masked": 69,
+    "is_cross_sheet": false,
+    "unique_patterns": 1,
+    "avg_complexity": 3,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.277
+  },
+  "task_id": "single_sheet__dag_4bb26e0e64d1",
+  "elapsed": 75.7,
+  "publish_decision": "YES",
+  "release_tier": "GOLD",
+  "hard_block_reasons": []
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/target_contract.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/target_contract.json
new file mode 100644
index 0000000000000000000000000000000000000000..032857ad2730ef8c1d22eba5c41db218e6797d2e
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/target_contract.json
@@ -0,0 +1,118 @@
+{
+  "task_id": "single_sheet__dag_4bb26e0e64d1",
+  "category": "single_sheet",
+  "depth": 2,
+  "final_target": {
+    "regions": [
+      {
+        "sheet": "JonMckay-Mon10",
+        "column": "B",
+        "column_header": "Date",
+        "cell_range": "B16:B21, B29:B34, B40:B45, B52:B57, B64:B69, B76:B81, B87:B92, B98:B103, B111:B116, B122:B127",
+        "cell_count": 60,
+        "rows": [
+          16,
+          17,
+          18,
+          19,
+          20,
+          21,
+          29,
+          30,
+          31,
+          32,
+          33,
+          34,
+          40,
+          41,
+          42,
+          43,
+          44,
+          45,
+          52,
+          53,
+          54,
+          55,
+          56,
+          57,
+          64,
+          65,
+          66,
+          67,
+          68,
+          69,
+          76,
+          77,
+          78,
+          79,
+          80,
+          81,
+          87,
+          88,
+          89,
+          90,
+          91,
+          92,
+          98,
+          99,
+          100,
+          101,
+          102,
+          103,
+          111,
+          112,
+          113,
+          114,
+          115,
+          116,
+          122,
+          123,
+          124,
+          125,
+          126,
+          127
+        ],
+        "first_row_label": "Wed",
+        "last_row_label": "Mon"
+      }
+    ],
+    "cell_count": 60,
+    "formula_families": [
+      "arithmetic"
+    ]
+  },
+  "prerequisite_steps": [
+    {
+      "layer": 2,
+      "regions": [
+        {
+          "sheet": "JonMckay-Mon10",
+          "column": "B",
+          "column_header": "Date",
+          "cell_range": "B15, B28, B39, B51, B63, B75, B86, B97, B110",
+          "cell_count": 9,
+          "rows": [
+            15,
+            28,
+            39,
+            51,
+            63,
+            75,
+            86,
+            97,
+            110
+          ],
+          "first_row_label": "Phase",
+          "last_row_label": "Phase"
+        }
+      ],
+      "cell_count": 9
+    }
+  ],
+  "total_prerequisite_cells": 9,
+  "total_masked_cells": 69,
+  "ratio_total_vs_final": 1.1,
+  "sheets_involved": [
+    "JonMckay-Mon10"
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/task_meta.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/task_meta.json
new file mode 100644
index 0000000000000000000000000000000000000000..b652fbd3684a8e449e0af012e441d46efc37e17a
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02101/task_meta.json
@@ -0,0 +1,37 @@
+{
+  "fcb_id": "FCB-02101",
+  "task_id": "single_sheet__dag_4bb26e0e64d1",
+  "tier": "T3_MEDIUM",
+  "category": "single_sheet",
+  "depth": 2,
+  "total_masked": 69,
+  "is_cross_sheet": false,
+  "prompt_en": "On the JonMckay-Mon10 sheet, this workbook looks like a running log or training estimate page, with visible labels such as 10k PR, Set 2 years ago, Age, Resting HR, estimate, and the note about having no problems and increasing the mileage. The Date column is missing entries in several blocks of the log, and those dates anchor the related rows before the rest of the row information is meaningful.\n\nPlease fill in the blank Date cells on JonMckay-Mon10 in column B: B16:B21, B29:B34, B40:B45, B52:B57, B64:B69, B76:B81, B87:B92, B98:B103, B111:B116, and B122:B127. When you’re done, save the completed file as an .xlsx file.",
+  "prompt_cn": "在 JonMckay-Mon10 工作表中，这份工作簿看起来像是一份跑步日志或训练估算页面，里面能看到 10k PR、Set 2 years ago、Age、Resting HR、estimate，以及关于没有问题并增加里程的说明。Date 列有几段日志的日期缺失，而这些日期是对应行内容成立的基础，日期补齐后相关行的信息才完整。\n\n请补全 JonMckay-Mon10 工作表 B 列 Date 中的空白单元格：B16:B21、B29:B34、B40:B45、B52:B57、B64:B69、B76:B81、B87:B92、B98:B103、B111:B116 和 B122:B127。完成后，请将文件保存为 .xlsx 格式。",
+  "qc": {
+    "total": 29,
+    "verdict": "RELEASE",
+    "D1": 5,
+    "D2": 5,
+    "D3": 5,
+    "D4": 4,
+    "D5": 5,
+    "D6": 5,
+    "frontier_hardness": 2,
+    "local_difficulty": 33.9
+  },
+  "source_file_id": "jonathan_mckay__17194__JonMCKAY061101",
+  "inferred_domain": "general",
+  "domain_confidence": 0.0,
+  "sheet_profiles": [
+    {
+      "name": "JonMckay-Mon10",
+      "used_range": "A1:G130",
+      "row_count": 130,
+      "col_count": 7,
+      "has_header": false,
+      "title_hint": "JonMckay Mon10",
+      "header_info": null
+    }
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/audit.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/audit.json
new file mode 100644
index 0000000000000000000000000000000000000000..22dc1cc13575f9ab7d7ed3c2c20ca50ce0acac60
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/audit.json
@@ -0,0 +1,408 @@
+{
+  "gate": {
+    "pre_nl_gate": {
+      "gate_label": "GATE_PASS",
+      "gate_pass": true,
+      "hard_fails": 0,
+      "warns": 0,
+      "checks": [
+        {
+          "check": "final_target_gate",
+          "pass": true,
+          "detail": "final_target has 343 cells"
+        },
+        {
+          "check": "header_grounding",
+          "pass": true,
+          "severity": "pass",
+          "detail": "1/1 final regions have column_header"
+        },
+        {
+          "check": "mask_consistency",
+          "pass": true,
+          "detail": "mask_last=128981B, src=129733B"
+        },
+        {
+          "check": "dirty_family",
+          "pass": true,
+          "detail": "0 dirty cells"
+        },
+        {
+          "check": "ratio_gate",
+          "pass": true,
+          "detail": "ratio=1.0 (total=346, final=343)"
+        },
+        {
+          "check": "dedup_gate",
+          "pass": true,
+          "detail": "0 duplicate cells across layers"
+        },
+        {
+          "check": "gt_uniqueness",
+          "pass": true,
+          "detail": "29 unique values across 346 cells"
+        },
+        {
+          "check": "tail_artifact",
+          "pass": true,
+          "detail": "0 bad values"
+        },
+        {
+          "check": "unrecoverable_leaf",
+          "pass": true,
+          "detail": "clean",
+          "hidden_const_cells": []
+        },
+        {
+          "check": "adjacent_column_leak",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "header_name_accuracy",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "duplicate_lookup_tie_break",
+          "pass": true,
+          "detail": "no lookup formulas"
+        },
+        {
+          "check": "src_chain_integrity",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean",
+          "sub_checks": {
+            "error_cells": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "external_refs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "volatile_funcs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "missing_sheets": {
+              "pass": true,
+              "count": 0,
+              "sheets": []
+            },
+            "circular_refs": {
+              "pass": true,
+              "cycle_cells": []
+            }
+          }
+        },
+        {
+          "check": "uniqueness_deep",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean"
+        }
+      ]
+    },
+    "post_nl_validate": {
+      "validate_label": "CLEAN",
+      "validate_pass": true,
+      "hard_fails": 0,
+      "soft_warns": 0,
+      "checks": [
+        {
+          "check": "cell_range_match",
+          "pass": true,
+          "detail": "contract=4, prompt=1, missing=0",
+          "missing_ranges": [],
+          "severity": "OK"
+        },
+        {
+          "check": "cell_count_match",
+          "pass": true,
+          "detail": "no explicit total found; skipping (natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "step_count_match",
+          "pass": true,
+          "detail": "contract=1, no explicit steps found (v5 natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "sheet_name_match",
+          "pass": true,
+          "detail": "contract=['Sheet1'], missing=[]",
+          "severity": "OK"
+        },
+        {
+          "check": "no_formula_leak",
+          "pass": true,
+          "detail": "0 formula leaks",
+          "severity": "OK"
+        },
+        {
+          "check": "no_value_leak",
+          "pass": true,
+          "detail": "0 value leaks out of 343 GT cells",
+          "severity": "OK"
+        },
+        {
+          "check": "final_target_first",
+          "pass": true,
+          "detail": "no explicit final target marker (natural format)",
+          "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": true,
+          "detail": "no cross-sheet refs in GT",
+          "severity": "OK"
+        },
+        {
+          "check": "exemplar_consistency",
+          "pass": true,
+          "severity": "OK",
+          "detail": "checked 4 col groups; CONFLICTS: Sheet1!Y2: visible='=K2' vs GT pattern='=SUM(Y#:Y#)'; Sheet1!AM2: visible='=K2' vs GT pattern='=SUM(AM#:AM#)'"
+        },
+        {
+          "check": "nl_gt_operation_consistency",
+          "pass": true,
+          "detail": "GT funcs: ['SUM']",
+          "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 346 GT cells (0%)",
+          "severity": "OK"
+        }
+      ]
+    },
+    "pre_nl_local": {
+      "local_total": 58,
+      "local_label": "PENDING_NL",
+      "hard_fail_flags": [],
+      "warnings": [
+        "release_verdict_not_keep",
+        "nl_missing"
+      ],
+      "local_subscores": {
+        "family_clean": 25,
+        "target_integrity": 15,
+        "taxonomy": 10,
+        "semantic_signal": 8,
+        "nl_schema": 0,
+        "target_alignment": 0,
+        "business_specificity": 0,
+        "nl_risk": 0
+      }
+    }
+  },
+  "verify": {
+    "uniqueness": {
+      "total_gt_cells": 346,
+      "total_non_none": 346,
+      "block_reasons": [],
+      "warnings": [],
+      "checks": {
+        "rank_tie_risk": {
+          "rank_cells": 0,
+          "tie_issues": 0,
+          "details": []
+        },
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+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/ground_truth_full.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/ground_truth_full.json
new file mode 100644
index 0000000000000000000000000000000000000000..d8b77f9628bbd045a2eaa5006877a9d1fbfdaf5d
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/ground_truth_full.json
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diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/ground_truth_target.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/ground_truth_target.json
new file mode 100644
index 0000000000000000000000000000000000000000..5021b2b0269557eae8896debd86fdb8e35370c12
--- /dev/null
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--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/nl_task.json
@@ -0,0 +1,26 @@
+{
+  "task_id": "single_sheet__dag_4d3aa63ca5bb",
+  "prompt_en": "Sheet1 is a district-level table titled “2010-11 Iowa Public School Unilateral Removals by District, All Removal Types,” with identifying columns such as County, AEA, District, and District Name. Please complete the blank entries in the “Fighting w/ Injury” column, located in K3:K345, for each district row. Some of the blank removal-type columns in the sheet relate to later fields, so the individual category figures need to be in place before the rest of the row is fully meaningful. When you’re done, please save the completed workbook as an .xlsx file.",
+  "prompt_cn": "Sheet1 是一张按学区列出的表，标题为“2010-11 Iowa Public School Unilateral Removals by District, All Removal Types”，其中包含 County、AEA、District 和 District Name 等识别信息列。请补全“Fighting w/ Injury”列中的空白项，位置是 K3:K345，对应每一行学区记录。表中有些空白的移除类型列会与后面的字段相关，因此各个类别的数据需要先补齐，整行信息才完整。完成后，请将填好的工作簿保存为 .xlsx 文件。",
+  "quality_notes": "The prompt is specific to the visible sheet title and headers, identifies the target column and range, mentions the natural dependency context without describing operations, and avoids formulas or answer values.",
+  "post_check_issues": [],
+  "prompt_mode": "minimal",
+  "hint_leakage": {
+    "score": 3,
+    "level": "low",
+    "max_possible": 100,
+    "dimensions": {
+      "operation_words": 0,
+      "cell_range_density": 3,
+      "step_by_step": 0,
+      "column_operation_mapping": 0,
+      "formula_pattern_hints": 0
+    },
+    "operation_words_found": [],
+    "cell_ranges_found": 1
+  },
+  "version": "v7",
+  "model": "gpt-5.5",
+  "elapsed": 37.8,
+  "attempt": 2
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/release_qc.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/release_qc.json
new file mode 100644
index 0000000000000000000000000000000000000000..c965865b49a206063fa0f196cc1010d5f4e9ea4c
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/release_qc.json
@@ -0,0 +1,58 @@
+{
+  "binary": true,
+  "binary_reason": "CORRECT: clean chain-masked task with real cells, consistent formulas, and sufficient visible spreadsheet structure to infer the masked formulas.",
+  "D1": {
+    "score": 5,
+    "reason": "All 346 contract cells are real in-sheet cells within the populated data range, and the mask diff shows all contract cells truly masked with no extra masking. There is no phantom range and no boundary anomaly. The K-column formula is not directly copyable from another visible K cell because the entire K3:K345 target range is masked; visible adjacent formulas provide structural clues but not zero-reasoning leakage."
+  },
+  "D2": {
+    "score": 5,
+    "reason": "The ground-truth formulas are consistent with the source workbook: K rows aggregate the corresponding Fighting w/ Injury subcolumns Y, AM, and BA, and the layer-2 state-total cells use deterministic SUM formulas over district rows. Cached examples align with the stated formulas, and there are no signs of ambiguity or volatile behavior."
+  },
+  "D3": {
+    "score": 4,
+    "reason": "The NL clearly identifies the workbook, sheet, target column, and range K3:K345. It also hints that other blank removal-type fields are related and must be meaningful. However, it does not explicitly name the prerequisite masked state-total cells Y3, AM3, and BA3, so the chain aspect is somewhat implicit rather than fully spelled out."
+  },
+  "D4": {
+    "score": 5,
+    "reason": "Using only mask_last.xlsx and the NL, the task is reconstructible. The repeated removal-type sections are visible with headers and row-2 header-link formulas, and adjacent All Removal Types columns show the aggregation pattern across In-school suspension, Out-of-school suspension, Expulsion, and later sections. For the masked prerequisite cells Y3, AM3, and BA3, surrounding row-3 cells visibly use SUM over rows 4:345, making the state-total formula pattern clear. For K4:K345 and K3, the solver can infer that Fighting w/ Injury aggregates the visible category figures in Y, AM, and BA for each row, with K3 depending on the corresponding state totals. No hidden constants or external evidence are required.",
+    "d4_type": "ok"
+  },
+  "D5": {
+    "score": 5,
+    "reason": "The source spreadsheet appears structurally sound: headers are meaningful and repeated consistently across removal-type sections, formulas are regular and deterministic, the used data range matches the district rows, and there are no indications of corrupted values, circular references, broken formulas, or inconsistent source formulas."
+  },
+  "D6": {
+    "score": 5,
+    "reason": "The NL prompt reads like a realistic workplace request: it describes the dataset, identifies the missing column and range, gives light context about related removal-type fields, and asks the user to save the completed workbook without benchmark jargon."
+  },
+  "total": 29,
+  "verdict": "RELEASE",
+  "verdict_reason": "High-quality task: clean masking, correct ground truth, coherent NL, and sufficient visible evidence for reconstructing the dependency chain. The only minor issue is that the prerequisite cells are not explicitly named in the prompt, but the sheet structure makes them inferable.",
+  "frontier_hardness": {
+    "score": 2,
+    "reason": "This is a short single-sheet chain with highly regular spreadsheet structure. A frontier model should infer the repeated aggregation pattern from adjacent formulas and section headers, then fill the uniform K-column formulas plus the three state-total SUM prerequisites. The task is not trivial direct-copy because K is fully masked, but it is likely manageable for an advanced model.",
+    "fail_reason": "easy",
+    "is_valid_hardness": false
+  },
+  "_prompt_chars": 308499,
+  "_timing_load_workbooks": 1.28,
+  "_timing_context": 0.07,
+  "_timing_api": 72.69,
+  "local_difficulty": {
+    "difficulty_score": 53.0,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 346,
+    "is_cross_sheet": false,
+    "unique_patterns": 4,
+    "avg_complexity": 6,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.003
+  },
+  "task_id": "single_sheet__dag_4d3aa63ca5bb",
+  "elapsed": 74.0,
+  "publish_decision": "YES",
+  "release_tier": "GOLD",
+  "hard_block_reasons": []
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/target_contract.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/target_contract.json
new file mode 100644
index 0000000000000000000000000000000000000000..ea399789040e70612676fbf225b5a99c10705f75
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/target_contract.json
@@ -0,0 +1,417 @@
+{
+  "task_id": "single_sheet__dag_4d3aa63ca5bb",
+  "category": "single_sheet",
+  "depth": 2,
+  "final_target": {
+    "regions": [
+      {
+        "sheet": "Sheet1",
+        "column": "K",
+        "column_header": "Fighting w/ Injury",
+        "cell_range": "K3:K345",
+        "cell_count": 343,
+        "rows": [
+          3,
+          4,
+          5,
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+    "cell_count": 343,
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+      "arithmetic"
+    ]
+  },
+  "prerequisite_steps": [
+    {
+      "layer": 2,
+      "regions": [
+        {
+          "sheet": "Sheet1",
+          "column": "AM",
+          "column_header": "Fighting w/ Injury",
+          "cell_range": "AM3",
+          "cell_count": 1,
+          "rows": [
+            3
+          ],
+          "first_row_label": "",
+          "last_row_label": ""
+        },
+        {
+          "sheet": "Sheet1",
+          "column": "BA",
+          "column_header": "Fighting w/ Injury",
+          "cell_range": "BA3",
+          "cell_count": 1,
+          "rows": [
+            3
+          ],
+          "first_row_label": "",
+          "last_row_label": ""
+        },
+        {
+          "sheet": "Sheet1",
+          "column": "Y",
+          "column_header": "Fighting w/ Injury",
+          "cell_range": "Y3",
+          "cell_count": 1,
+          "rows": [
+            3
+          ],
+          "first_row_label": "",
+          "last_row_label": ""
+        }
+      ],
+      "cell_count": 3
+    }
+  ],
+  "total_prerequisite_cells": 3,
+  "total_masked_cells": 346,
+  "ratio_total_vs_final": 1.0,
+  "sheets_involved": [
+    "Sheet1"
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/task_meta.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/task_meta.json
new file mode 100644
index 0000000000000000000000000000000000000000..abc98b548ae259c092520b8116fa245aab3ca851
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02103/task_meta.json
@@ -0,0 +1,37 @@
+{
+  "fcb_id": "FCB-02103",
+  "task_id": "single_sheet__dag_4d3aa63ca5bb",
+  "tier": "T3_MEDIUM",
+  "category": "single_sheet",
+  "depth": 2,
+  "total_masked": 346,
+  "is_cross_sheet": false,
+  "prompt_en": "Sheet1 is a district-level table titled “2010-11 Iowa Public School Unilateral Removals by District, All Removal Types,” with identifying columns such as County, AEA, District, and District Name. Please complete the blank entries in the “Fighting w/ Injury” column, located in K3:K345, for each district row. Some of the blank removal-type columns in the sheet relate to later fields, so the individual category figures need to be in place before the rest of the row is fully meaningful. When you’re done, please save the completed workbook as an .xlsx file.",
+  "prompt_cn": "Sheet1 是一张按学区列出的表，标题为“2010-11 Iowa Public School Unilateral Removals by District, All Removal Types”，其中包含 County、AEA、District 和 District Name 等识别信息列。请补全“Fighting w/ Injury”列中的空白项，位置是 K3:K345，对应每一行学区记录。表中有些空白的移除类型列会与后面的字段相关，因此各个类别的数据需要先补齐，整行信息才完整。完成后，请将填好的工作簿保存为 .xlsx 文件。",
+  "qc": {
+    "total": 29,
+    "verdict": "RELEASE",
+    "D1": 5,
+    "D2": 5,
+    "D3": 4,
+    "D4": 5,
+    "D5": 5,
+    "D6": 5,
+    "frontier_hardness": 2,
+    "local_difficulty": 53.0
+  },
+  "source_file_id": "30b404b7-e5b5-4ec1-8709-5fcfb22b1dad",
+  "inferred_domain": "general",
+  "domain_confidence": 0.0,
+  "sheet_profiles": [
+    {
+      "name": "Sheet1",
+      "used_range": "A1:BR350",
+      "row_count": 350,
+      "col_count": 70,
+      "has_header": false,
+      "title_hint": "Sheet1",
+      "header_info": null
+    }
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/audit.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/audit.json
new file mode 100644
index 0000000000000000000000000000000000000000..36081f20cc33ab98c358ce3435ef368abfc4035b
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/audit.json
@@ -0,0 +1,407 @@
+{
+  "gate": {
+    "pre_nl_gate": {
+      "gate_label": "GATE_PASS",
+      "gate_pass": true,
+      "hard_fails": 0,
+      "warns": 0,
+      "checks": [
+        {
+          "check": "final_target_gate",
+          "pass": true,
+          "detail": "final_target has 9 cells"
+        },
+        {
+          "check": "header_grounding",
+          "pass": true,
+          "severity": "pass",
+          "detail": "1/1 final regions have column_header"
+        },
+        {
+          "check": "mask_consistency",
+          "pass": true,
+          "detail": "mask_last=13381B, src=20344B"
+        },
+        {
+          "check": "dirty_family",
+          "pass": true,
+          "detail": "0 dirty cells"
+        },
+        {
+          "check": "ratio_gate",
+          "pass": true,
+          "detail": "ratio=2.0 (total=18, final=9)"
+        },
+        {
+          "check": "dedup_gate",
+          "pass": true,
+          "detail": "0 duplicate cells across layers"
+        },
+        {
+          "check": "gt_uniqueness",
+          "pass": true,
+          "detail": "16 unique values across 18 cells"
+        },
+        {
+          "check": "tail_artifact",
+          "pass": true,
+          "detail": "0 bad values"
+        },
+        {
+          "check": "unrecoverable_leaf",
+          "pass": true,
+          "detail": "clean",
+          "hidden_const_cells": []
+        },
+        {
+          "check": "adjacent_column_leak",
+          "pass": true,
+          "detail": "leaked: Master Calculator!I→Consultant Calculator!I(8/9), Master Calculator!G→Consultant Calculator!G(8/9)"
+        },
+        {
+          "check": "header_name_accuracy",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "duplicate_lookup_tie_break",
+          "pass": true,
+          "detail": "no lookup formulas"
+        },
+        {
+          "check": "src_chain_integrity",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean",
+          "sub_checks": {
+            "error_cells": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "external_refs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "volatile_funcs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "missing_sheets": {
+              "pass": true,
+              "count": 0,
+              "sheets": []
+            },
+            "circular_refs": {
+              "pass": true,
+              "cycle_cells": []
+            }
+          }
+        },
+        {
+          "check": "uniqueness_deep",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean"
+        }
+      ]
+    },
+    "post_nl_validate": {
+      "validate_label": "CLEAN",
+      "validate_pass": true,
+      "hard_fails": 0,
+      "soft_warns": 0,
+      "checks": [
+        {
+          "check": "cell_range_match",
+          "pass": true,
+          "detail": "contract=4, prompt=2, missing=0",
+          "missing_ranges": [],
+          "severity": "OK"
+        },
+        {
+          "check": "cell_count_match",
+          "pass": true,
+          "detail": "no explicit total found; skipping (natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "step_count_match",
+          "pass": true,
+          "detail": "contract=1, no explicit steps found (v5 natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "sheet_name_match",
+          "pass": true,
+          "detail": "contract=['Consultant Calculator'], missing=[]",
+          "severity": "OK"
+        },
+        {
+          "check": "no_formula_leak",
+          "pass": true,
+          "detail": "0 formula leaks",
+          "severity": "OK"
+        },
+        {
+          "check": "no_value_leak",
+          "pass": true,
+          "detail": "0 value leaks out of 9 GT cells",
+          "severity": "OK"
+        },
+        {
+          "check": "final_target_first",
+          "pass": true,
+          "detail": "no explicit final target marker (natural format)",
+          "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": true,
+          "detail": "no cross-sheet refs in GT",
+          "severity": "OK"
+        },
+        {
+          "check": "exemplar_consistency",
+          "pass": true,
+          "severity": "OK",
+          "detail": "checked 2 col groups"
+        },
+        {
+          "check": "nl_gt_operation_consistency",
+          "pass": true,
+          "detail": "GT funcs: ['SUM']",
+          "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 18 GT cells (0%)",
+          "severity": "OK"
+        }
+      ]
+    },
+    "pre_nl_local": {
+      "local_total": 58,
+      "local_label": "PENDING_NL",
+      "hard_fail_flags": [],
+      "warnings": [
+        "nl_missing"
+      ],
+      "local_subscores": {
+        "family_clean": 25,
+        "target_integrity": 15,
+        "taxonomy": 10,
+        "semantic_signal": 8,
+        "nl_schema": 0,
+        "target_alignment": 0,
+        "business_specificity": 0,
+        "nl_risk": 0
+      }
+    }
+  },
+  "verify": {
+    "uniqueness": {
+      "total_gt_cells": 18,
+      "total_non_none": 18,
+      "block_reasons": [],
+      "warnings": [],
+      "checks": {
+        "rank_tie_risk": {
+          "rank_cells": 0,
+          "tie_issues": 0,
+          "details": []
+        },
+        "trivial_gt": {
+          "issues": []
+        },
+        "gt_type_consistency": {
+          "types": {
+            "int": 18
+          },
+          "mixed": false
+        },
+        "empty_gt": {
+          "count": 0,
+          "details": []
+        }
+      }
+    },
+    "src_chain": {
+      "hard_block": false,
+      "block_reasons": [],
+      "checks": {
+        "error_cells": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "external_refs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "volatile_funcs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "missing_sheets": {
+          "pass": true,
+          "count": 0,
+          "sheets": []
+        },
+        "circular_refs": {
+          "pass": true,
+          "cycle_cells": []
+        }
+      },
+      "required_chain_scope": {
+        "external_ref_in_required_chain": 0,
+        "external_ref_in_other": 0,
+        "error_cells_in_required_chain": 0,
+        "error_cells_in_other": 0,
+        "required_chain_cells": 18
+      }
+    },
+    "solver_visibility": {
+      "contract_cells": 18,
+      "total_masked": 18,
+      "total_visible": 206,
+      "depth": 2,
+      "block_reasons": [],
+      "warnings": [],
+      "checks": {
+        "broken_chains": {
+          "count": 0,
+          "checked": 18,
+          "details": []
+        },
+        "orphan_masks": {
+          "count": 0,
+          "details": []
+        },
+        "self_contained": {
+          "missing_sheets": []
+        }
+      }
+    },
+    "exemplar": {
+      "soft_block": false,
+      "block_reasons": [],
+      "checks": {
+        "pattern_coverage": {
+          "pass": true,
+          "total_gt_patterns": 2,
+          "total_src_patterns": 16,
+          "zero_exemplar_count": 0,
+          "low_exemplar_count": 0
+        },
+        "zero_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "low_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "func_coverage": {
+          "SUM": {
+            "total_masked": 18,
+            "visible_exemplars": 196
+          }
+        }
+      }
+    },
+    "shortcut": {
+      "shortcut_risk": 1.0,
+      "flags": [
+        {
+          "code": "SC3",
+          "description": "Copy-from-visible: 9/18 GT cells have nearby visible formula clones",
+          "affected_cells": 9,
+          "severity": "high"
+        }
+      ]
+    },
+    "release_audit": {
+      "surface_single_sheet": true,
+      "surface_sheets": [
+        "Consultant Calculator"
+      ],
+      "cross_sheet_actual": false,
+      "cross_sheet_ref_count": 0,
+      "referenced_sheets": [],
+      "target_shape": "summary_block",
+      "layer_sizes": [
+        9,
+        9
+      ],
+      "mask_last_total_cells": 18,
+      "layer_growth_ratios": [
+        1.0
+      ],
+      "pattern_dominance_ratio": 0.5,
+      "visible_clone_regions": 2,
+      "nearby_visible_clone_regions": 0,
+      "nearby_visible_clone_rows": 0,
+      "nearby_visible_clone_ratio": 0.0,
+      "promptability_score": 1.0,
+      "release_reasons": [],
+      "release_verdict": "KEEP"
+    }
+  },
+  "difficulty": {
+    "task_id": "single_sheet__dag_705c31a1e86b",
+    "difficulty_score": 37.0,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 18,
+    "is_cross_sheet": false,
+    "unique_patterns": 2,
+    "avg_complexity": 5.0,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.182,
+    "score_breakdown": {
+      "depth": 7,
+      "cross_sheet": 0,
+      "cell_count": 8.3,
+      "patterns": 6,
+      "complexity": 7.5,
+      "cross_refs": 0,
+      "vis_penalty": 8.2
+    }
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/ground_truth_full.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/ground_truth_full.json
new file mode 100644
index 0000000000000000000000000000000000000000..b2fd78122ad9ee4f153f78f3f5259aff774908ab
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/ground_truth_full.json
@@ -0,0 +1,164 @@
+[
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 8,
+    "formula": "=SUM(G8*39)",
+    "cached_value": 48750,
+    "pattern_id": "pf_0004",
+    "layer": 1
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 9,
+    "formula": "=SUM(G9*39)",
+    "cached_value": 97500,
+    "pattern_id": "pf_0004",
+    "layer": 1
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 10,
+    "formula": "=SUM(G10*39)",
+    "cached_value": 195000,
+    "pattern_id": "pf_0004",
+    "layer": 1
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 11,
+    "formula": "=SUM(G11*39)",
+    "cached_value": 292500,
+    "pattern_id": "pf_0004",
+    "layer": 1
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 12,
+    "formula": "=SUM(G12*39)",
+    "cached_value": 390000,
+    "pattern_id": "pf_0004",
+    "layer": 1
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 13,
+    "formula": "=SUM(G13*39)",
+    "cached_value": 487500,
+    "pattern_id": "pf_0004",
+    "layer": 1
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 14,
+    "formula": "=SUM(G14*39)",
+    "cached_value": 585000,
+    "pattern_id": "pf_0004",
+    "layer": 1
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 15,
+    "formula": "=SUM(G15*39)",
+    "cached_value": 975000,
+    "pattern_id": "pf_0004",
+    "layer": 1
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 20,
+    "formula": "=SUM(G20*39)",
+    "cached_value": 195000,
+    "pattern_id": "pf_0004",
+    "layer": 1
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "G",
+    "row": 8,
+    "formula": "=SUM(E8*F8)",
+    "cached_value": 1250,
+    "pattern_id": "pf_0002",
+    "layer": 2
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "G",
+    "row": 9,
+    "formula": "=SUM(E9*F9)",
+    "cached_value": 2500,
+    "pattern_id": "pf_0002",
+    "layer": 2
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "G",
+    "row": 10,
+    "formula": "=SUM(E10*F10)",
+    "cached_value": 5000,
+    "pattern_id": "pf_0002",
+    "layer": 2
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "G",
+    "row": 11,
+    "formula": "=SUM(E11*F11)",
+    "cached_value": 7500,
+    "pattern_id": "pf_0002",
+    "layer": 2
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "G",
+    "row": 12,
+    "formula": "=SUM(E12*F12)",
+    "cached_value": 10000,
+    "pattern_id": "pf_0002",
+    "layer": 2
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "G",
+    "row": 13,
+    "formula": "=SUM(E13*F13)",
+    "cached_value": 12500,
+    "pattern_id": "pf_0002",
+    "layer": 2
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "G",
+    "row": 14,
+    "formula": "=SUM(E14*F14)",
+    "cached_value": 15000,
+    "pattern_id": "pf_0002",
+    "layer": 2
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "G",
+    "row": 15,
+    "formula": "=SUM(E15*F15)",
+    "cached_value": 25000,
+    "pattern_id": "pf_0002",
+    "layer": 2
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "G",
+    "row": 20,
+    "formula": "=SUM(E20*F20)",
+    "cached_value": 5000,
+    "pattern_id": "pf_0002",
+    "layer": 2
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/ground_truth_target.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/ground_truth_target.json
new file mode 100644
index 0000000000000000000000000000000000000000..38179dd713d5ca7ed8dfe3845b76135c9f9877f1
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/ground_truth_target.json
@@ -0,0 +1,74 @@
+[
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 8,
+    "formula": "=SUM(G8*39)",
+    "cached_value": 48750,
+    "pattern_id": "pf_0004"
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 9,
+    "formula": "=SUM(G9*39)",
+    "cached_value": 97500,
+    "pattern_id": "pf_0004"
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 10,
+    "formula": "=SUM(G10*39)",
+    "cached_value": 195000,
+    "pattern_id": "pf_0004"
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 11,
+    "formula": "=SUM(G11*39)",
+    "cached_value": 292500,
+    "pattern_id": "pf_0004"
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 12,
+    "formula": "=SUM(G12*39)",
+    "cached_value": 390000,
+    "pattern_id": "pf_0004"
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 13,
+    "formula": "=SUM(G13*39)",
+    "cached_value": 487500,
+    "pattern_id": "pf_0004"
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 14,
+    "formula": "=SUM(G14*39)",
+    "cached_value": 585000,
+    "pattern_id": "pf_0004"
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 15,
+    "formula": "=SUM(G15*39)",
+    "cached_value": 975000,
+    "pattern_id": "pf_0004"
+  },
+  {
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "row": 20,
+    "formula": "=SUM(G20*39)",
+    "cached_value": 195000,
+    "pattern_id": "pf_0004"
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/layers.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/layers.json
new file mode 100644
index 0000000000000000000000000000000000000000..4af086df9e05c7d8a57a378f14c7b5161975f5df
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/layers.json
@@ -0,0 +1,85 @@
+{
+  "dag_id": "dag_705c31a1e86b",
+  "file_id": "790960d1660078256-look-up-tool-calc-x",
+  "category": "single_sheet",
+  "surface_category": "single_sheet",
+  "effective_category": "single_sheet",
+  "depth": 2,
+  "quality": {
+    "chain_error_cells": 0,
+    "chain_external_cells": 0,
+    "is_clean": true
+  },
+  "layers": [
+    {
+      "layer_index": 1,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00015",
+            "rg_00016"
+          ],
+          "sheet": "Consultant Calculator",
+          "col": "I",
+          "rows": [
+            8,
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            20
+          ],
+          "row_ranges": "8-15,20",
+          "row_count": 9,
+          "pattern_id": "pf_0004",
+          "normalized_pattern": "=SUM([C-2,R]*39)",
+          "sample_formula": "=SUM(G8*39)"
+        }
+      ],
+      "new_eval_cells": 9,
+      "total_masked_cells": 9
+    },
+    {
+      "layer_index": 2,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00007",
+            "rg_00008"
+          ],
+          "sheet": "Consultant Calculator",
+          "col": "G",
+          "rows": [
+            8,
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            20
+          ],
+          "row_ranges": "8-15,20",
+          "row_count": 9,
+          "pattern_id": "pf_0002",
+          "normalized_pattern": "=SUM([C-2,R]*[C-1,R])",
+          "sample_formula": "=SUM(E8*F8)"
+        }
+      ],
+      "new_eval_cells": 9,
+      "total_masked_cells": 18
+    }
+  ],
+  "sink": {
+    "region_id": "rg_00015",
+    "sheet": "Consultant Calculator",
+    "col": "I",
+    "pattern_id": "pf_0004",
+    "row_count": 8,
+    "family_size": 9
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/mask_last.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/mask_last.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..2ea721921993905039f8953759fd3362135a08ad
Binary files /dev/null and b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/mask_last.xlsx differ
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/nl_task.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/nl_task.json
new file mode 100644
index 0000000000000000000000000000000000000000..a1b1a0e322fac35ba916f93fffb4c20affce3a94
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/nl_task.json
@@ -0,0 +1,26 @@
+{
+  "task_id": "single_sheet__dag_705c31a1e86b",
+  "prompt_en": "The Consultant Calculator sheet is set up for finance review, with sections labeled Billings, Basic, Title, Days Per Week, Runners, Days Average, Commision Paid Per Year @, Margin Average, and Per Week. For the fiscal year close-out, please fill in the blank values in the Per Year column: I8:I15 and I20. Some of the other blank fields on the sheet support the yearly figures, so those entries need to be in place before the Per Year column is complete. Please save the completed workbook as an .xlsx file.",
+  "prompt_cn": "“Consultant Calculator”工作表是用于财务复核的，里面有 Billings、Basic、Title、Days Per Week、Runners、Days Average、Commision Paid Per Year @、Margin Average 和 Per Week 等栏目。为了完成 fiscal year close-out，请把 Per Year 列中的空白值补齐：I8:I15 和 I20。表中其他一些空白字段会支撑年度数字，因此这些内容也需要先补好，Per Year 列才算完整。请将完成后的工作簿保存为 .xlsx 文件。",
+  "quality_notes": "The prompt is minimal and business-oriented, references only visible sheet labels and the provided fiscal year close-out framing, identifies the target Per Year cells clearly, and avoids formulas or operational hints.",
+  "post_check_issues": [],
+  "prompt_mode": "minimal",
+  "hint_leakage": {
+    "score": 4,
+    "level": "low",
+    "max_possible": 100,
+    "dimensions": {
+      "operation_words": 0,
+      "cell_range_density": 4,
+      "step_by_step": 0,
+      "column_operation_mapping": 0,
+      "formula_pattern_hints": 0
+    },
+    "operation_words_found": [],
+    "cell_ranges_found": 1
+  },
+  "version": "v7",
+  "model": "gpt-5.5",
+  "elapsed": 6.8,
+  "attempt": 1
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/release_qc.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/release_qc.json
new file mode 100644
index 0000000000000000000000000000000000000000..48cc334ece7880a87bb243f78f286b0a91f2dee8
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/release_qc.json
@@ -0,0 +1,58 @@
+{
+  "binary": true,
+  "binary_reason": "Well-designed: mask is clean, GT is consistent, and the G→I dependency can be inferred from visible headers, adjacent values, and visible annualization clues.",
+  "D1": {
+    "score": 5,
+    "reason": "All 18 masked cells are real in-range cells matching the contract. The mask boundary is clean with no extra masked cells and no contract cells left unmasked. Formula-cache-missing artifacts are correctly not treated as masking. No trivially copyable same-pattern leakage is evident for the target formulas."
+  },
+  "D2": {
+    "score": 5,
+    "reason": "Ground-truth formulas are consistent with the source: each Per Year cell is G-row multiplied by 39, and cached values match the prerequisite weekly values. The formulas are deterministic and internally consistent."
+  },
+  "D3": {
+    "score": 5,
+    "reason": "The NL description clearly identifies the sheet and exact target range I8:I15 and I20, and it explains that other blanks support the yearly figures. It is unambiguous for the requested output."
+  },
+  "D4": {
+    "score": 4,
+    "reason": "Using only mask_last and the NL prompt, the task is solvable. The visible headers identify G as Per Week, H as Per 4 Week Average, and I as Per Year. H values provide a direct structural clue that G equals H divided by 4, and visible E/F columns also support G as Days Average times Margin Average. For annualization, the sheet includes visible use of the 39 multiplier elsewhere, giving evidence for I as weekly amount times 39. The only minor gap is that the 39-week annualization rule is not explicitly stated in the prompt or header, so the solver must notice and generalize the visible sheet clue.",
+    "d4_type": "ok"
+  },
+  "D5": {
+    "score": 5,
+    "reason": "Source spreadsheet data appears sound for the audited area: formulas are coherent, cached values match expected calculations, headers are meaningful, and there are no signs of corrupted values, broken formulas, circular references, or phantom ranges relevant to this task."
+  },
+  "D6": {
+    "score": 5,
+    "reason": "The prompt reads like a plausible workplace finance review request, avoids benchmark jargon, and naturally explains the need to complete dependent blank fields before the yearly figures."
+  },
+  "total": 29,
+  "verdict": "RELEASE",
+  "verdict_reason": "High-quality task with clean masking, correct GT, clear instructions, and sufficient visible evidence for the dependency chain. The annualization constant requires some inference but is visible in the workbook.",
+  "frontier_hardness": {
+    "score": 2,
+    "reason": "This is a short two-layer single-sheet chain with only two simple formula patterns: weekly values and yearly values. Visible headers and adjacent values make the structure straightforward, and a frontier model should likely infer the dependency chain successfully.",
+    "fail_reason": "easy",
+    "is_valid_hardness": false
+  },
+  "_prompt_chars": 23474,
+  "_timing_load_workbooks": 0.05,
+  "_timing_context": 0.01,
+  "_timing_api": 19.59,
+  "local_difficulty": {
+    "difficulty_score": 37.0,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 18,
+    "is_cross_sheet": false,
+    "unique_patterns": 2,
+    "avg_complexity": 5,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.182
+  },
+  "task_id": "single_sheet__dag_705c31a1e86b",
+  "elapsed": 19.6,
+  "publish_decision": "YES",
+  "release_tier": "GOLD",
+  "hard_block_reasons": []
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/src.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/src.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..bc27ff07e0c47e1c682cc41348ab067f826a7e22
Binary files /dev/null and b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/src.xlsx differ
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/target_contract.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/target_contract.json
new file mode 100644
index 0000000000000000000000000000000000000000..810544abe0d7e2aa114aa5ac689d56350dda29c9
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/target_contract.json
@@ -0,0 +1,67 @@
+{
+  "task_id": "single_sheet__dag_705c31a1e86b",
+  "category": "single_sheet",
+  "depth": 2,
+  "final_target": {
+    "regions": [
+      {
+        "sheet": "Consultant Calculator",
+        "column": "I",
+        "column_header": "Per Year",
+        "cell_range": "I8:I15, I20",
+        "cell_count": 9,
+        "rows": [
+          8,
+          9,
+          10,
+          11,
+          12,
+          13,
+          14,
+          15,
+          20
+        ],
+        "first_row_label": "Trainee",
+        "last_row_label": ""
+      }
+    ],
+    "cell_count": 9,
+    "formula_families": [
+      "aggregation"
+    ]
+  },
+  "prerequisite_steps": [
+    {
+      "layer": 2,
+      "regions": [
+        {
+          "sheet": "Consultant Calculator",
+          "column": "G",
+          "column_header": "Per Week",
+          "cell_range": "G8:G15, G20",
+          "cell_count": 9,
+          "rows": [
+            8,
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            20
+          ],
+          "first_row_label": "Trainee",
+          "last_row_label": ""
+        }
+      ],
+      "cell_count": 9
+    }
+  ],
+  "total_prerequisite_cells": 9,
+  "total_masked_cells": 18,
+  "ratio_total_vs_final": 2.0,
+  "sheets_involved": [
+    "Consultant Calculator"
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/task_meta.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/task_meta.json
new file mode 100644
index 0000000000000000000000000000000000000000..e0b5232026cd9f9428de2a81725c252c1ccf1513
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02171/task_meta.json
@@ -0,0 +1,46 @@
+{
+  "fcb_id": "FCB-02171",
+  "task_id": "single_sheet__dag_705c31a1e86b",
+  "tier": "T3_MEDIUM",
+  "category": "single_sheet",
+  "depth": 2,
+  "total_masked": 18,
+  "is_cross_sheet": false,
+  "prompt_en": "The Consultant Calculator sheet is set up for finance review, with sections labeled Billings, Basic, Title, Days Per Week, Runners, Days Average, Commision Paid Per Year @, Margin Average, and Per Week. For the fiscal year close-out, please fill in the blank values in the Per Year column: I8:I15 and I20. Some of the other blank fields on the sheet support the yearly figures, so those entries need to be in place before the Per Year column is complete. Please save the completed workbook as an .xlsx file.",
+  "prompt_cn": "“Consultant Calculator”工作表是用于财务复核的，里面有 Billings、Basic、Title、Days Per Week、Runners、Days Average、Commision Paid Per Year @、Margin Average 和 Per Week 等栏目。为了完成 fiscal year close-out，请把 Per Year 列中的空白值补齐：I8:I15 和 I20。表中其他一些空白字段会支撑年度数字，因此这些内容也需要先补好，Per Year 列才算完整。请将完成后的工作簿保存为 .xlsx 文件。",
+  "qc": {
+    "total": 29,
+    "verdict": "RELEASE",
+    "D1": 5,
+    "D2": 5,
+    "D3": 5,
+    "D4": 4,
+    "D5": 5,
+    "D6": 5,
+    "frontier_hardness": 2,
+    "local_difficulty": 37.0
+  },
+  "source_file_id": "790960d1660078256-look-up-tool-calc-x",
+  "inferred_domain": "finance",
+  "domain_confidence": 0.25,
+  "sheet_profiles": [
+    {
+      "name": "Consultant Calculator",
+      "used_range": "A1:V38",
+      "row_count": 38,
+      "col_count": 22,
+      "has_header": false,
+      "title_hint": "Consultant Calculator",
+      "header_info": null
+    },
+    {
+      "name": "Master Calculator",
+      "used_range": "A2:AE38",
+      "row_count": 37,
+      "col_count": 31,
+      "has_header": false,
+      "title_hint": "Master Calculator",
+      "header_info": null
+    }
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/audit.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/audit.json
new file mode 100644
index 0000000000000000000000000000000000000000..6b204b0cb12ad6d7689a9ad44fd30d783ac6a144
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/audit.json
@@ -0,0 +1,412 @@
+{
+  "gate": {
+    "pre_nl_gate": {
+      "gate_label": "GATE_PASS",
+      "gate_pass": true,
+      "hard_fails": 0,
+      "warns": 0,
+      "checks": [
+        {
+          "check": "final_target_gate",
+          "pass": true,
+          "detail": "final_target has 9 cells"
+        },
+        {
+          "check": "header_grounding",
+          "pass": true,
+          "severity": "pass",
+          "detail": "1/1 final regions have column_header"
+        },
+        {
+          "check": "mask_consistency",
+          "pass": true,
+          "detail": "mask_last=13579B, src=23249B"
+        },
+        {
+          "check": "dirty_family",
+          "pass": true,
+          "detail": "0 dirty cells"
+        },
+        {
+          "check": "ratio_gate",
+          "pass": true,
+          "detail": "ratio=3.0 (total=27, final=9)"
+        },
+        {
+          "check": "dedup_gate",
+          "pass": true,
+          "detail": "0 duplicate cells across layers"
+        },
+        {
+          "check": "gt_uniqueness",
+          "pass": true,
+          "detail": "27 unique values across 27 cells"
+        },
+        {
+          "check": "tail_artifact",
+          "pass": true,
+          "detail": "0 bad values"
+        },
+        {
+          "check": "unrecoverable_leaf",
+          "pass": true,
+          "detail": "clean",
+          "hidden_const_cells": []
+        },
+        {
+          "check": "adjacent_column_leak",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "header_name_accuracy",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "duplicate_lookup_tie_break",
+          "pass": true,
+          "detail": "no lookup formulas"
+        },
+        {
+          "check": "src_chain_integrity",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean",
+          "sub_checks": {
+            "error_cells": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "external_refs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "volatile_funcs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "missing_sheets": {
+              "pass": true,
+              "count": 0,
+              "sheets": []
+            },
+            "circular_refs": {
+              "pass": true,
+              "cycle_cells": []
+            }
+          }
+        },
+        {
+          "check": "uniqueness_deep",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean"
+        }
+      ]
+    },
+    "post_nl_validate": {
+      "validate_label": "SOFT_WARN",
+      "validate_pass": true,
+      "hard_fails": 0,
+      "soft_warns": 1,
+      "checks": [
+        {
+          "check": "cell_range_match",
+          "pass": false,
+          "detail": "contract=3, prompt=1, missing=1",
+          "missing_ranges": [
+            "O9:O17"
+          ],
+          "severity": "SOFT_WARN"
+        },
+        {
+          "check": "cell_count_match",
+          "pass": true,
+          "detail": "no explicit total found; skipping (natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "step_count_match",
+          "pass": true,
+          "detail": "contract=1, no explicit steps found (v5 natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "sheet_name_match",
+          "pass": true,
+          "detail": "contract=['Sheet1'], missing=[]",
+          "severity": "OK"
+        },
+        {
+          "check": "no_formula_leak",
+          "pass": true,
+          "detail": "0 formula leaks",
+          "severity": "OK"
+        },
+        {
+          "check": "no_value_leak",
+          "pass": true,
+          "detail": "0 value leaks out of 9 GT cells",
+          "severity": "OK"
+        },
+        {
+          "check": "final_target_first",
+          "pass": true,
+          "detail": "no explicit final target marker (natural format)",
+          "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": true,
+          "detail": "no cross-sheet refs in GT",
+          "severity": "OK"
+        },
+        {
+          "check": "exemplar_consistency",
+          "pass": true,
+          "severity": "OK",
+          "detail": "checked 3 col groups; CONFLICTS: Sheet1!L35: visible='=J35*(1+$H$29)' vs GT pattern='=SUM(O#/M#)'; Sheet1!L36: visible='=L35*M36' vs GT pattern='=SUM(O#/M#)'"
+        },
+        {
+          "check": "nl_gt_operation_consistency",
+          "pass": true,
+          "detail": "GT funcs: ['SUM']",
+          "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 27 GT cells (0%)",
+          "severity": "OK"
+        }
+      ]
+    },
+    "pre_nl_local": {
+      "local_total": 58,
+      "local_label": "PENDING_NL",
+      "hard_fail_flags": [],
+      "warnings": [
+        "nl_missing"
+      ],
+      "local_subscores": {
+        "family_clean": 25,
+        "target_integrity": 15,
+        "taxonomy": 10,
+        "semantic_signal": 8,
+        "nl_schema": 0,
+        "target_alignment": 0,
+        "business_specificity": 0,
+        "nl_risk": 0
+      }
+    }
+  },
+  "verify": {
+    "uniqueness": {
+      "total_gt_cells": 27,
+      "total_non_none": 27,
+      "block_reasons": [],
+      "warnings": [
+        "mixed_gt_types:{'float': 9, 'int': 18}"
+      ],
+      "checks": {
+        "rank_tie_risk": {
+          "rank_cells": 0,
+          "tie_issues": 0,
+          "details": []
+        },
+        "trivial_gt": {
+          "issues": []
+        },
+        "gt_type_consistency": {
+          "types": {
+            "float": 9,
+            "int": 18
+          },
+          "mixed": true
+        },
+        "empty_gt": {
+          "count": 0,
+          "details": []
+        }
+      }
+    },
+    "src_chain": {
+      "hard_block": false,
+      "block_reasons": [],
+      "checks": {
+        "error_cells": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "external_refs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "volatile_funcs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "missing_sheets": {
+          "pass": true,
+          "count": 0,
+          "sheets": []
+        },
+        "circular_refs": {
+          "pass": true,
+          "cycle_cells": []
+        }
+      },
+      "required_chain_scope": {
+        "external_ref_in_required_chain": 0,
+        "external_ref_in_other": 0,
+        "error_cells_in_required_chain": 0,
+        "error_cells_in_other": 0,
+        "required_chain_cells": 27
+      }
+    },
+    "solver_visibility": {
+      "contract_cells": 27,
+      "total_masked": 27,
+      "total_visible": 203,
+      "depth": 2,
+      "block_reasons": [],
+      "warnings": [],
+      "checks": {
+        "broken_chains": {
+          "count": 0,
+          "checked": 27,
+          "details": []
+        },
+        "orphan_masks": {
+          "count": 0,
+          "details": []
+        },
+        "self_contained": {
+          "missing_sheets": []
+        }
+      }
+    },
+    "exemplar": {
+      "soft_block": false,
+      "block_reasons": [],
+      "checks": {
+        "pattern_coverage": {
+          "pass": true,
+          "total_gt_patterns": 2,
+          "total_src_patterns": 26,
+          "zero_exemplar_count": 0,
+          "low_exemplar_count": 0
+        },
+        "zero_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "low_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "func_coverage": {
+          "SUM": {
+            "total_masked": 27,
+            "visible_exemplars": 150
+          }
+        }
+      }
+    },
+    "shortcut": {
+      "shortcut_risk": 0.2,
+      "flags": [
+        {
+          "code": "SC3",
+          "description": "Copy-from-visible: 4/27 GT cells have nearby visible formula clones",
+          "affected_cells": 4,
+          "severity": "low"
+        }
+      ]
+    },
+    "release_audit": {
+      "surface_single_sheet": true,
+      "surface_sheets": [
+        "Sheet1"
+      ],
+      "cross_sheet_actual": false,
+      "cross_sheet_ref_count": 0,
+      "referenced_sheets": [],
+      "target_shape": "summary_block",
+      "layer_sizes": [
+        9,
+        18
+      ],
+      "mask_last_total_cells": 27,
+      "layer_growth_ratios": [
+        2.0
+      ],
+      "pattern_dominance_ratio": 0.3333,
+      "visible_clone_regions": 0,
+      "nearby_visible_clone_regions": 0,
+      "nearby_visible_clone_rows": 0,
+      "nearby_visible_clone_ratio": 0.0,
+      "promptability_score": 1.0,
+      "release_reasons": [],
+      "release_verdict": "KEEP"
+    }
+  },
+  "difficulty": {
+    "task_id": "single_sheet__dag_9535d9db8e48",
+    "difficulty_score": 35.4,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 27,
+    "is_cross_sheet": false,
+    "unique_patterns": 3,
+    "avg_complexity": 5.0,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.757,
+    "score_breakdown": {
+      "depth": 7,
+      "cross_sheet": 0,
+      "cell_count": 9.5,
+      "patterns": 9,
+      "complexity": 7.5,
+      "cross_refs": 0,
+      "vis_penalty": 2.4
+    }
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/ground_truth_full.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/ground_truth_full.json
new file mode 100644
index 0000000000000000000000000000000000000000..e876c0460004312153d025e5b9f89ae320a1a8aa
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/ground_truth_full.json
@@ -0,0 +1,245 @@
+[
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 9,
+    "formula": "=SUM(O9/M9)",
+    "cached_value": 1.0365853658536586,
+    "pattern_id": "pf_0007",
+    "layer": 1
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 10,
+    "formula": "=SUM(O10/M10)",
+    "cached_value": 0.927246790299572,
+    "pattern_id": "pf_0007",
+    "layer": 1
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 11,
+    "formula": "=SUM(O11/M11)",
+    "cached_value": 0.8485958485958486,
+    "pattern_id": "pf_0007",
+    "layer": 1
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 12,
+    "formula": "=SUM(O12/M12)",
+    "cached_value": 0.8695652173913043,
+    "pattern_id": "pf_0007",
+    "layer": 1
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 13,
+    "formula": "=SUM(O13/M13)",
+    "cached_value": 0.8286358511837655,
+    "pattern_id": "pf_0007",
+    "layer": 1
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 14,
+    "formula": "=SUM(O14/M14)",
+    "cached_value": 0.8014911463187325,
+    "pattern_id": "pf_0007",
+    "layer": 1
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 15,
+    "formula": "=SUM(O15/M15)",
+    "cached_value": 0.8288043478260869,
+    "pattern_id": "pf_0007",
+    "layer": 1
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 16,
+    "formula": "=SUM(O16/M16)",
+    "cached_value": 0.7692307692307693,
+    "pattern_id": "pf_0007",
+    "layer": 1
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 17,
+    "formula": "=SUM(O17/M17)",
+    "cached_value": 0.7720891824938068,
+    "pattern_id": "pf_0007",
+    "layer": 1
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "M",
+    "row": 9,
+    "formula": "=SUM(F9*G9)",
+    "cached_value": 11480,
+    "pattern_id": "pf_0008",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "M",
+    "row": 10,
+    "formula": "=SUM(F10*G10)",
+    "cached_value": 14020,
+    "pattern_id": "pf_0008",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "M",
+    "row": 11,
+    "formula": "=SUM(F11*G11)",
+    "cached_value": 75348,
+    "pattern_id": "pf_0008",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "M",
+    "row": 12,
+    "formula": "=SUM(F12*G12)",
+    "cached_value": 27232,
+    "pattern_id": "pf_0008",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "M",
+    "row": 13,
+    "formula": "=SUM(F13*G13)",
+    "cached_value": 21288,
+    "pattern_id": "pf_0008",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "M",
+    "row": 14,
+    "formula": "=SUM(F14*G14)",
+    "cached_value": 17168,
+    "pattern_id": "pf_0008",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "M",
+    "row": 15,
+    "formula": "=SUM(F15*G15)",
+    "cached_value": 30912,
+    "pattern_id": "pf_0008",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "M",
+    "row": 16,
+    "formula": "=SUM(F16*G16)",
+    "cached_value": 22880,
+    "pattern_id": "pf_0008",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "M",
+    "row": 17,
+    "formula": "=SUM(F17*G17)",
+    "cached_value": 48440,
+    "pattern_id": "pf_0008",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "O",
+    "row": 9,
+    "formula": "=SUM(F9*N9)",
+    "cached_value": 11900,
+    "pattern_id": "pf_0009",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "O",
+    "row": 10,
+    "formula": "=SUM(F10*N10)",
+    "cached_value": 13000,
+    "pattern_id": "pf_0009",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "O",
+    "row": 11,
+    "formula": "=SUM(F11*N11)",
+    "cached_value": 63940,
+    "pattern_id": "pf_0009",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "O",
+    "row": 12,
+    "formula": "=SUM(F12*N12)",
+    "cached_value": 23680,
+    "pattern_id": "pf_0009",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "O",
+    "row": 13,
+    "formula": "=SUM(F13*N13)",
+    "cached_value": 17640,
+    "pattern_id": "pf_0009",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "O",
+    "row": 14,
+    "formula": "=SUM(F14*N14)",
+    "cached_value": 13760,
+    "pattern_id": "pf_0009",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "O",
+    "row": 15,
+    "formula": "=SUM(F15*N15)",
+    "cached_value": 25620,
+    "pattern_id": "pf_0009",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "O",
+    "row": 16,
+    "formula": "=SUM(F16*N16)",
+    "cached_value": 17600,
+    "pattern_id": "pf_0009",
+    "layer": 2
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "O",
+    "row": 17,
+    "formula": "=SUM(F17*N17)",
+    "cached_value": 37400,
+    "pattern_id": "pf_0009",
+    "layer": 2
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/ground_truth_target.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/ground_truth_target.json
new file mode 100644
index 0000000000000000000000000000000000000000..cc6b1a88ec5867a6f56710c6c2f5ec3f9ed6b88f
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/ground_truth_target.json
@@ -0,0 +1,74 @@
+[
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 9,
+    "formula": "=SUM(O9/M9)",
+    "cached_value": 1.0365853658536586,
+    "pattern_id": "pf_0007"
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 10,
+    "formula": "=SUM(O10/M10)",
+    "cached_value": 0.927246790299572,
+    "pattern_id": "pf_0007"
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 11,
+    "formula": "=SUM(O11/M11)",
+    "cached_value": 0.8485958485958486,
+    "pattern_id": "pf_0007"
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 12,
+    "formula": "=SUM(O12/M12)",
+    "cached_value": 0.8695652173913043,
+    "pattern_id": "pf_0007"
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 13,
+    "formula": "=SUM(O13/M13)",
+    "cached_value": 0.8286358511837655,
+    "pattern_id": "pf_0007"
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 14,
+    "formula": "=SUM(O14/M14)",
+    "cached_value": 0.8014911463187325,
+    "pattern_id": "pf_0007"
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 15,
+    "formula": "=SUM(O15/M15)",
+    "cached_value": 0.8288043478260869,
+    "pattern_id": "pf_0007"
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 16,
+    "formula": "=SUM(O16/M16)",
+    "cached_value": 0.7692307692307693,
+    "pattern_id": "pf_0007"
+  },
+  {
+    "sheet": "Sheet1",
+    "col": "L",
+    "row": 17,
+    "formula": "=SUM(O17/M17)",
+    "cached_value": 0.7720891824938068,
+    "pattern_id": "pf_0007"
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/layers.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/layers.json
new file mode 100644
index 0000000000000000000000000000000000000000..eac3913c89d6806b599ad281ee4ddc9bae794067
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/layers.json
@@ -0,0 +1,106 @@
+{
+  "dag_id": "dag_9535d9db8e48",
+  "file_id": "phillip_allen__29449__lakeside villas_proforma_gthorse",
+  "category": "single_sheet",
+  "surface_category": "single_sheet",
+  "effective_category": "single_sheet",
+  "depth": 2,
+  "quality": {
+    "chain_error_cells": 0,
+    "chain_external_cells": 0,
+    "is_clean": true
+  },
+  "layers": [
+    {
+      "layer_index": 1,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00101"
+          ],
+          "sheet": "Sheet1",
+          "col": "L",
+          "rows": [
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            16,
+            17
+          ],
+          "row_ranges": "9-17",
+          "row_count": 9,
+          "pattern_id": "pf_0007",
+          "normalized_pattern": "=SUM([C+3,R]/[C+1,R])",
+          "sample_formula": "=SUM(O9/M9)"
+        }
+      ],
+      "new_eval_cells": 9,
+      "total_masked_cells": 9
+    },
+    {
+      "layer_index": 2,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00102"
+          ],
+          "sheet": "Sheet1",
+          "col": "M",
+          "rows": [
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            16,
+            17
+          ],
+          "row_ranges": "9-17",
+          "row_count": 9,
+          "pattern_id": "pf_0008",
+          "normalized_pattern": "=SUM([C-7,R]*[C-6,R])",
+          "sample_formula": "=SUM(F9*G9)"
+        },
+        {
+          "region_ids": [
+            "rg_00103"
+          ],
+          "sheet": "Sheet1",
+          "col": "O",
+          "rows": [
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            16,
+            17
+          ],
+          "row_ranges": "9-17",
+          "row_count": 9,
+          "pattern_id": "pf_0009",
+          "normalized_pattern": "=SUM([C-9,R]*[C-1,R])",
+          "sample_formula": "=SUM(F9*N9)"
+        }
+      ],
+      "new_eval_cells": 18,
+      "total_masked_cells": 27
+    }
+  ],
+  "sink": {
+    "region_id": "rg_00101",
+    "sheet": "Sheet1",
+    "col": "L",
+    "pattern_id": "pf_0007",
+    "row_count": 9,
+    "family_size": 9
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/mask_last.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/mask_last.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..b13246228d38408834f848526bb225e876546819
Binary files /dev/null and b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/mask_last.xlsx differ
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/nl_task.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/nl_task.json
new file mode 100644
index 0000000000000000000000000000000000000000..b7ccc25b6e3f553a90719210a9f21164fb1c6bb2
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/nl_task.json
@@ -0,0 +1,26 @@
+{
+  "task_id": "single_sheet__dag_9535d9db8e48",
+  "prompt_en": "Sheet1 is a finance review table for real-estate projects, with fields like Project, Asking Price, Estimate of Income, Existing Debt, and Year Built; Lakeside Villa is one of the visible project entries. For the quarterly budget review, please complete the blank entries in the Per Sq. Ft. column on Sheet1, specifically L9:L17. If any related project-level blanks need to be in place first, fill those in so the Per Sq. Ft. entries are consistent with the rest of the row information. Please save the completed workbook as an .xlsx file.",
+  "prompt_cn": "Sheet1 是一张房地产项目的财务审核表，里面有 Project、Asking Price、Estimate of Income、Existing Debt 和 Year Built 等字段；Lakeside Villa 是其中一个可见的项目条目。为了季度预算 review，请补全 Sheet1 中 Per Sq. Ft. 列的空白项，具体位置是 L9:L17。如果有相关的项目层面空白内容需要先补齐，也请先填好，这样 Per Sq. Ft. 的内容才能和同一行的其他信息保持一致。请将完成后的工作簿保存为 .xlsx 文件。",
+  "quality_notes": "The prompt is minimal and business-framed, references only visible sheet labels and the provided quarterly budget review context, identifies the target column and range, and avoids formulas or operational hints.",
+  "post_check_issues": [],
+  "prompt_mode": "minimal",
+  "hint_leakage": {
+    "score": 3,
+    "level": "low",
+    "max_possible": 100,
+    "dimensions": {
+      "operation_words": 0,
+      "cell_range_density": 3,
+      "step_by_step": 0,
+      "column_operation_mapping": 0,
+      "formula_pattern_hints": 0
+    },
+    "operation_words_found": [],
+    "cell_ranges_found": 1
+  },
+  "version": "v7",
+  "model": "gpt-5.5",
+  "elapsed": 25.9,
+  "attempt": 1
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/release_qc.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/release_qc.json
new file mode 100644
index 0000000000000000000000000000000000000000..24a588461c91c7887a43f92ab5985341af110eef
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/release_qc.json
@@ -0,0 +1,58 @@
+{
+  "binary": true,
+  "binary_reason": "CORRECT — masked cells are real and clean, GT formulas are consistent, and the visible headers/data make the dependency chain reconstructible.",
+  "D1": {
+    "score": 5,
+    "reason": "All 27 contract cells are truly masked, with no contract misses and no extra masking. The cells are within the actual sheet range and correspond to meaningful row-level formulas. Formula-cache-missing entries are correctly identified as openpyxl artifacts, not extra blanks. No evidence of trivial pattern leakage that would reduce the task to zero-reasoning copy-fill."
+  },
+  "D2": {
+    "score": 5,
+    "reason": "The ground-truth layer-1 formulas L9:L17 compute Unit Rent divided by Total Rentable Sq. Ft. as =SUM(Orow/Mrow), which is deterministic and consistent with the cached values. The prerequisite formulas in src.xlsx also support the cached results: M is units times living area, O is units times monthly unit rent."
+  },
+  "D3": {
+    "score": 4,
+    "reason": "The prompt clearly identifies the target range L9:L17 and the Per Sq. Ft. column. It also tells the solver to fill related project-level blanks first, which covers the masked prerequisite cells. It does not explicitly name M9:M17 and O9:O17, so there is a minor clarity gap, but the task remains understandable."
+  },
+  "D4": {
+    "score": 5,
+    "reason": "Using only mask_last.xlsx and the NL prompt, the solver has sufficient evidence. The visible headers show F as No. of Living Units, G as Living Area, M as Total Rentable Sq. Ft., N as Unit Rent Per Mo., O as Total Monthly Unit Rent, and L as Rent Per Sq. Ft. This supports reconstructing M as F*G, O as F*N, and L as O/M. Visible totals M19 and O21 also provide consistency checks for the reconstructed prerequisite columns. The dependency chain is masked by design but fully inferable from the visible structure.",
+    "d4_type": "ok"
+  },
+  "D5": {
+    "score": 5,
+    "reason": "The source spreadsheet data appears internally sound. Headers are meaningful for the real-estate rent table, formulas are deterministic, no phantom references or broken cross-sheet dependencies are indicated, and the row-level calculations reconcile with visible totals."
+  },
+  "D6": {
+    "score": 5,
+    "reason": "The NL prompt sounds like a realistic workplace request for a quarterly budget review. It avoids benchmark jargon and naturally asks for completion of the Per Sq. Ft. entries and related blanks."
+  },
+  "total": 29,
+  "verdict": "RELEASE",
+  "verdict_reason": "High-quality chain-masked task: clean mask boundary, correct GT, sufficient visible evidence, and natural prompt. Minor prompt omission of prerequisite ranges is acceptable because the related blanks are structurally obvious.",
+  "frontier_hardness": {
+    "score": 2,
+    "reason": "This is a short single-sheet depth-2 chain with three simple arithmetic patterns and clear column headers. A frontier model should likely infer M=F*G, O=F*N, and L=O/M, especially with visible totals as checks.",
+    "fail_reason": "easy",
+    "is_valid_hardness": false
+  },
+  "_prompt_chars": 25065,
+  "_timing_load_workbooks": 0.07,
+  "_timing_context": 0.01,
+  "_timing_api": 53.79,
+  "local_difficulty": {
+    "difficulty_score": 35.4,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 27,
+    "is_cross_sheet": false,
+    "unique_patterns": 3,
+    "avg_complexity": 5,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.757
+  },
+  "task_id": "single_sheet__dag_9535d9db8e48",
+  "elapsed": 53.9,
+  "publish_decision": "YES",
+  "release_tier": "GOLD",
+  "hard_block_reasons": []
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/src.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/src.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..10888f395f88d82f8c4e5487ae083aa203139daf
Binary files /dev/null and b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/src.xlsx differ
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/target_contract.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/target_contract.json
new file mode 100644
index 0000000000000000000000000000000000000000..09779b64679ad8a74c53f98b8bfb64e5bbf2ed82
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/target_contract.json
@@ -0,0 +1,87 @@
+{
+  "task_id": "single_sheet__dag_9535d9db8e48",
+  "category": "single_sheet",
+  "depth": 2,
+  "final_target": {
+    "regions": [
+      {
+        "sheet": "Sheet1",
+        "column": "L",
+        "column_header": "Per Sq. Ft.",
+        "cell_range": "L9:L17",
+        "cell_count": 9,
+        "rows": [
+          9,
+          10,
+          11,
+          12,
+          13,
+          14,
+          15,
+          16,
+          17
+        ],
+        "first_row_label": "Annual",
+        "last_row_label": "Debt Service Estimate"
+      }
+    ],
+    "cell_count": 9,
+    "formula_families": [
+      "aggregation"
+    ]
+  },
+  "prerequisite_steps": [
+    {
+      "layer": 2,
+      "regions": [
+        {
+          "sheet": "Sheet1",
+          "column": "M",
+          "column_header": "Sq. Ft.",
+          "cell_range": "M9:M17",
+          "cell_count": 9,
+          "rows": [
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            16,
+            17
+          ],
+          "first_row_label": "Annual",
+          "last_row_label": "Debt Service Estimate"
+        },
+        {
+          "sheet": "Sheet1",
+          "column": "O",
+          "column_header": "Unit Rent ($)",
+          "cell_range": "O9:O17",
+          "cell_count": 9,
+          "rows": [
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            16,
+            17
+          ],
+          "first_row_label": "Annual",
+          "last_row_label": "Debt Service Estimate"
+        }
+      ],
+      "cell_count": 18
+    }
+  ],
+  "total_prerequisite_cells": 18,
+  "total_masked_cells": 27,
+  "ratio_total_vs_final": 3.0,
+  "sheets_involved": [
+    "Sheet1"
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/task_meta.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/task_meta.json
new file mode 100644
index 0000000000000000000000000000000000000000..f7e67860037b828ec8708a19d8e53355ba66c7a3
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02246/task_meta.json
@@ -0,0 +1,37 @@
+{
+  "fcb_id": "FCB-02246",
+  "task_id": "single_sheet__dag_9535d9db8e48",
+  "tier": "T3_MEDIUM",
+  "category": "single_sheet",
+  "depth": 2,
+  "total_masked": 27,
+  "is_cross_sheet": false,
+  "prompt_en": "Sheet1 is a finance review table for real-estate projects, with fields like Project, Asking Price, Estimate of Income, Existing Debt, and Year Built; Lakeside Villa is one of the visible project entries. For the quarterly budget review, please complete the blank entries in the Per Sq. Ft. column on Sheet1, specifically L9:L17. If any related project-level blanks need to be in place first, fill those in so the Per Sq. Ft. entries are consistent with the rest of the row information. Please save the completed workbook as an .xlsx file.",
+  "prompt_cn": "Sheet1 是一张房地产项目的财务审核表，里面有 Project、Asking Price、Estimate of Income、Existing Debt 和 Year Built 等字段；Lakeside Villa 是其中一个可见的项目条目。为了季度预算 review，请补全 Sheet1 中 Per Sq. Ft. 列的空白项，具体位置是 L9:L17。如果有相关的项目层面空白内容需要先补齐，也请先填好，这样 Per Sq. Ft. 的内容才能和同一行的其他信息保持一致。请将完成后的工作簿保存为 .xlsx 文件。",
+  "qc": {
+    "total": 29,
+    "verdict": "RELEASE",
+    "D1": 5,
+    "D2": 5,
+    "D3": 4,
+    "D4": 5,
+    "D5": 5,
+    "D6": 5,
+    "frontier_hardness": 2,
+    "local_difficulty": 35.4
+  },
+  "source_file_id": "phillip_allen__29449__lakeside villas_proforma_gthorse",
+  "inferred_domain": "finance",
+  "domain_confidence": 0.25,
+  "sheet_profiles": [
+    {
+      "name": "Sheet1",
+      "used_range": "A1:R106",
+      "row_count": 106,
+      "col_count": 18,
+      "has_header": false,
+      "title_hint": "Sheet1",
+      "header_info": null
+    }
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/audit.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/audit.json
new file mode 100644
index 0000000000000000000000000000000000000000..8b68c6dd781dcaf2412f6cd65a5f880a4598428c
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/audit.json
@@ -0,0 +1,598 @@
+{
+  "gate": {
+    "pre_nl_gate": {
+      "gate_label": "GATE_PASS",
+      "gate_pass": true,
+      "hard_fails": 0,
+      "warns": 0,
+      "checks": [
+        {
+          "check": "final_target_gate",
+          "pass": true,
+          "detail": "final_target has 57 cells"
+        },
+        {
+          "check": "header_grounding",
+          "pass": true,
+          "severity": "pass",
+          "detail": "1/1 final regions have column_header"
+        },
+        {
+          "check": "mask_consistency",
+          "pass": true,
+          "detail": "mask_last=393375B, src=609878B"
+        },
+        {
+          "check": "dirty_family",
+          "pass": true,
+          "detail": "0 dirty cells"
+        },
+        {
+          "check": "ratio_gate",
+          "pass": true,
+          "detail": "ratio=2.5 (total=145, final=57)"
+        },
+        {
+          "check": "dedup_gate",
+          "pass": true,
+          "detail": "0 duplicate cells across layers"
+        },
+        {
+          "check": "gt_uniqueness",
+          "pass": true,
+          "detail": "115 unique values across 145 cells"
+        },
+        {
+          "check": "tail_artifact",
+          "pass": true,
+          "detail": "0 bad values"
+        },
+        {
+          "check": "unrecoverable_leaf",
+          "pass": true,
+          "detail": "hidden_const=88 hidden:[L2:Permian Matrix!AI99[1000000], L2:Permian Matrix!AI100[1000000], L2:Permian Matrix!AI101[1000000]]",
+          "hidden_const_cells": [
+            "L2:Permian Matrix!AI99[1000000]",
+            "L2:Permian Matrix!AI100[1000000]",
+            "L2:Permian Matrix!AI101[1000000]",
+            "L2:Permian Matrix!AI102[1000000]",
+            "L2:Permian Matrix!AI103[1000000]",
+            "L2:Permian Matrix!AI104[1000000]",
+            "L2:Permian Matrix!AI105[1000000]",
+            "L2:Permian Matrix!AI106[1000000]",
+            "L2:Permian Matrix!AI107[1000000]",
+            "L2:Permian Matrix!AI108[1000000]",
+            "L2:Permian Matrix!AI109[1000000]",
+            "L2:Permian Matrix!AI110[1000000]",
+            "L2:Permian Matrix!AI111[1000000]",
+            "L2:Permian Matrix!AI112[1000000]",
+            "L2:Permian Matrix!AI113[1000000]",
+            "L2:Permian Matrix!AI114[1000000]",
+            "L2:Permian Matrix!AI115[1000000]",
+            "L2:Permian Matrix!AI116[1000000]",
+            "L2:Permian Matrix!AI117[1000000]",
+            "L2:Permian Matrix!AI118[1000000]",
+            "L2:Permian Matrix!AI119[1000000]",
+            "L2:Permian Matrix!AI120[1000000]",
+            "L2:Permian Matrix!AI121[1000000]",
+            "L2:Permian Matrix!AI122[1000000]",
+            "L2:Permian Matrix!AI123[1000000]",
+            "L2:Permian Matrix!AI124[1000000]",
+            "L2:Permian Matrix!AI125[1000000]",
+            "L2:Permian Matrix!AI126[1000000]",
+            "L2:Permian Matrix!AI127[1000000]",
+            "L2:Permian Matrix!AI128[1000000]",
+            "L2:Permian Matrix!AI129[1000000]",
+            "L2:Permian Matrix!AI130[1000000]",
+            "L2:Permian Matrix!AI131[1000000]",
+            "L2:Permian Matrix!AI132[1000000]",
+            "L2:Permian Matrix!AI133[1000000]",
+            "L2:Permian Matrix!AI134[1000000]",
+            "L2:Permian Matrix!AI135[1000000]",
+            "L2:Permian Matrix!AI136[1000000]",
+            "L2:Permian Matrix!AI137[1000000]",
+            "L2:Permian Matrix!AI138[1000000]",
+            "L2:Permian Matrix!AI139[1000000]",
+            "L2:Permian Matrix!AI140[1000000]",
+            "L2:Permian Matrix!AI141[1000000]",
+            "L2:Permian Matrix!AI142[1000000]",
+            "L2:Permian Matrix!AI143[1000000]",
+            "L2:Permian Matrix!AI144[1000000]",
+            "L2:Permian Matrix!AI145[1000000]",
+            "L2:Permian Matrix!AI146[1000000]",
+            "L2:Permian Matrix!AI147[1000000]",
+            "L2:Permian Matrix!AI148[1000000]",
+            "L2:Permian Matrix!AI149[1000000]",
+            "L2:Permian Matrix!AI150[1000000]",
+            "L2:Permian Matrix!AI151[1000000]",
+            "L2:Permian Matrix!AI152[1000000]",
+            "L2:Permian Matrix!AI153[1000000]",
+            "L2:Permian Matrix!AI154[1000000]",
+            "L2:Permian Matrix!AI155[1000000]",
+            "L2:Permian Matrix!AI156[1000000]",
+            "L2:Permian Matrix!AI157[1000000]",
+            "L2:Permian Matrix!AI158[1000000]",
+            "L2:Permian Matrix!AI159[1000000]",
+            "L2:Permian Matrix!AI160[1000000]",
+            "L2:Permian Matrix!AI161[1000000]",
+            "L2:Permian Matrix!AI162[1000000]",
+            "L2:Permian Matrix!AI163[1000000]",
+            "L2:Permian Matrix!AI164[1000000]",
+            "L2:Permian Matrix!AI165[1000000]",
+            "L2:Permian Matrix!AI166[1000000]",
+            "L2:Permian Matrix!AI167[1000000]",
+            "L2:Permian Matrix!AI168[1000000]",
+            "L2:Permian Matrix!AI169[1000000]",
+            "L2:Permian Matrix!AI170[1000000]",
+            "L2:Permian Matrix!AI171[1000000]",
+            "L2:Permian Matrix!AI172[1000000]",
+            "L2:Permian Matrix!AI173[1000000]",
+            "L2:Permian Matrix!AI174[1000000]",
+            "L2:Permian Matrix!AI175[1000000]",
+            "L2:Permian Matrix!AI176[1000000]",
+            "L2:Permian Matrix!AI177[1000000]",
+            "L2:Permian Matrix!AI178[1000000]",
+            "L2:Permian Matrix!AI179[1000000]",
+            "L2:Permian Matrix!AI180[1000000]",
+            "L2:Permian Matrix!AI181[1000000]",
+            "L2:Permian Matrix!AI182[1000000]",
+            "L2:Permian Matrix!AI183[1000000]",
+            "L2:Permian Matrix!AI184[1000000]",
+            "L2:Permian Matrix!AI185[1000000]",
+            "L2:Permian Matrix!AI186[1000000]"
+          ]
+        },
+        {
+          "check": "adjacent_column_leak",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "header_name_accuracy",
+          "pass": true,
+          "detail": "no column_header in contract"
+        },
+        {
+          "check": "duplicate_lookup_tie_break",
+          "pass": true,
+          "detail": "no lookup formulas"
+        },
+        {
+          "check": "src_chain_integrity",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean",
+          "sub_checks": {
+            "error_cells": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "external_refs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "volatile_funcs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "missing_sheets": {
+              "pass": true,
+              "count": 0,
+              "sheets": []
+            },
+            "circular_refs": {
+              "pass": true,
+              "cycle_cells": []
+            }
+          }
+        },
+        {
+          "check": "uniqueness_deep",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean"
+        }
+      ]
+    },
+    "post_nl_validate": {
+      "validate_label": "CLEAN",
+      "validate_pass": true,
+      "hard_fails": 0,
+      "soft_warns": 0,
+      "checks": [
+        {
+          "check": "cell_range_match",
+          "pass": true,
+          "detail": "contract=2, prompt=1, missing=0",
+          "missing_ranges": [],
+          "severity": "OK"
+        },
+        {
+          "check": "cell_count_match",
+          "pass": true,
+          "detail": "no explicit total found; skipping (natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "step_count_match",
+          "pass": true,
+          "detail": "contract=1, no explicit steps found (v5 natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "sheet_name_match",
+          "pass": true,
+          "detail": "contract=['Permian Matrix'], missing=[]",
+          "severity": "OK"
+        },
+        {
+          "check": "no_formula_leak",
+          "pass": true,
+          "detail": "0 formula leaks",
+          "severity": "OK"
+        },
+        {
+          "check": "no_value_leak",
+          "pass": true,
+          "detail": "0 value leaks out of 57 GT cells",
+          "severity": "OK"
+        },
+        {
+          "check": "final_target_first",
+          "pass": true,
+          "detail": "no explicit final target marker (natural format)",
+          "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": true,
+          "detail": "no cross-sheet refs in GT",
+          "severity": "OK"
+        },
+        {
+          "check": "exemplar_consistency",
+          "pass": true,
+          "severity": "OK",
+          "detail": "checked 1 col groups"
+        },
+        {
+          "check": "nl_gt_operation_consistency",
+          "pass": true,
+          "detail": "GT funcs: []",
+          "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 145 GT cells (0%)",
+          "severity": "OK"
+        }
+      ]
+    },
+    "pre_nl_local": {
+      "local_total": 55,
+      "local_label": "PENDING_NL",
+      "hard_fail_flags": [],
+      "warnings": [
+        "release_verdict_not_keep",
+        "nl_missing"
+      ],
+      "local_subscores": {
+        "family_clean": 25,
+        "target_integrity": 15,
+        "taxonomy": 10,
+        "semantic_signal": 5,
+        "nl_schema": 0,
+        "target_alignment": 0,
+        "business_specificity": 0,
+        "nl_risk": 0
+      }
+    }
+  },
+  "verify": {
+    "uniqueness": {
+      "total_gt_cells": 145,
+      "total_non_none": 145,
+      "block_reasons": [],
+      "warnings": [
+        "mixed_gt_types:{'int': 31, 'float': 114}"
+      ],
+      "checks": {
+        "rank_tie_risk": {
+          "rank_cells": 0,
+          "tie_issues": 0,
+          "details": []
+        },
+        "trivial_gt": {
+          "issues": []
+        },
+        "gt_type_consistency": {
+          "types": {
+            "int": 31,
+            "float": 114
+          },
+          "mixed": true
+        },
+        "empty_gt": {
+          "count": 0,
+          "details": []
+        }
+      }
+    },
+    "src_chain": {
+      "hard_block": false,
+      "block_reasons": [],
+      "checks": {
+        "error_cells": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "external_refs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "volatile_funcs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "missing_sheets": {
+          "pass": true,
+          "count": 0,
+          "sheets": []
+        },
+        "circular_refs": {
+          "pass": true,
+          "cycle_cells": []
+        }
+      },
+      "required_chain_scope": {
+        "external_ref_in_required_chain": 0,
+        "external_ref_in_other": 0,
+        "error_cells_in_required_chain": 0,
+        "error_cells_in_other": 0,
+        "required_chain_cells": 145
+      }
+    },
+    "solver_visibility": {
+      "contract_cells": 145,
+      "total_masked": 145,
+      "total_visible": 4991,
+      "depth": 2,
+      "block_reasons": [
+        "broken_chains:30/145=20.7%"
+      ],
+      "warnings": [],
+      "checks": {
+        "broken_chains": {
+          "count": 30,
+          "checked": 145,
+          "details": [
+            {
+              "cell": "Permian Matrix!AI114",
+              "missing_dep": "Permian Matrix!AI18",
+              "formula": "=(AI18/1000000)/$A114"
+            },
+            {
+              "cell": "Permian Matrix!AI123",
+              "missing_dep": "Permian Matrix!AI27",
+              "formula": "=(AI27/1000000)/$A123"
+            },
+            {
+              "cell": "Permian Matrix!AI107",
+              "missing_dep": "Permian Matrix!AI11",
+              "formula": "=(AI11/1000000)/$A107"
+            },
+            {
+              "cell": "Permian Matrix!AI116",
+              "missing_dep": "Permian Matrix!AI20",
+              "formula": "=(AI20/1000000)/$A116"
+            },
+            {
+              "cell": "Permian Matrix!AI125",
+              "missing_dep": "Permian Matrix!AI29",
+              "formula": "=(AI29/1000000)/$A125"
+            },
+            {
+              "cell": "Permian Matrix!AI100",
+              "missing_dep": "Permian Matrix!AI4",
+              "formula": "=(AI4/1000000)/$A100"
+            },
+            {
+              "cell": "Permian Matrix!AI109",
+              "missing_dep": "Permian Matrix!AI13",
+              "formula": "=(AI13/1000000)/$A109"
+            },
+            {
+              "cell": "Permian Matrix!AI118",
+              "missing_dep": "Permian Matrix!AI22",
+              "formula": "=(AI22/1000000)/$A118"
+            },
+            {
+              "cell": "Permian Matrix!AI127",
+              "missing_dep": "Permian Matrix!AI31",
+              "formula": "=(AI31/1000000)/$A127"
+            },
+            {
+              "cell": "Permian Matrix!AI102",
+              "missing_dep": "Permian Matrix!AI6",
+              "formula": "=(AI6/1000000)/$A102"
+            },
+            {
+              "cell": "Permian Matrix!AI111",
+              "missing_dep": "Permian Matrix!AI15",
+              "formula": "=(AI15/1000000)/$A111"
+            },
+            {
+              "cell": "Permian Matrix!AI120",
+              "missing_dep": "Permian Matrix!AI24",
+              "formula": "=(AI24/1000000)/$A120"
+            },
+            {
+              "cell": "Permian Matrix!AI104",
+              "missing_dep": "Permian Matrix!AI8",
+              "formula": "=(AI8/1000000)/$A104"
+            },
+            {
+              "cell": "Permian Matrix!AI113",
+              "missing_dep": "Permian Matrix!AI17",
+              "formula": "=(AI17/1000000)/$A113"
+            },
+            {
+              "cell": "Permian Matrix!AI122",
+              "missing_dep": "Permian Matrix!AI26",
+              "formula": "=(AI26/1000000)/$A122"
+            },
+            {
+              "cell": "Permian Matrix!AI106",
+              "missing_dep": "Permian Matrix!AI10",
+              "formula": "=(AI10/1000000)/$A106"
+            },
+            {
+              "cell": "Permian Matrix!AI115",
+              "missing_dep": "Permian Matrix!AI19",
+              "formula": "=(AI19/1000000)/$A115"
+            },
+            {
+              "cell": "Permian Matrix!AI124",
+              "missing_dep": "Permian Matrix!AI28",
+              "formula": "=(AI28/1000000)/$A124"
+            },
+            {
+              "cell": "Permian Matrix!AI99",
+              "missing_dep": "Permian Matrix!AI3",
+              "formula": "=(AI3/1000000)/$A99"
+            },
+            {
+              "cell": "Permian Matrix!AI108",
+              "missing_dep": "Permian Matrix!AI12",
+              "formula": "=(AI12/1000000)/$A108"
+            }
+          ]
+        },
+        "orphan_masks": {
+          "count": 0,
+          "details": []
+        },
+        "self_contained": {
+          "missing_sheets": []
+        }
+      }
+    },
+    "exemplar": {
+      "soft_block": false,
+      "block_reasons": [],
+      "checks": {
+        "pattern_coverage": {
+          "pass": true,
+          "total_gt_patterns": 2,
+          "total_src_patterns": 5,
+          "zero_exemplar_count": 0,
+          "low_exemplar_count": 0
+        },
+        "zero_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "low_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "func_coverage": {
+          "arithmetic": {
+            "total_masked": 145,
+            "visible_exemplars": 11694
+          }
+        }
+      }
+    },
+    "shortcut": {
+      "shortcut_risk": 0.0,
+      "flags": []
+    },
+    "release_audit": {
+      "surface_single_sheet": true,
+      "surface_sheets": [
+        "Permian Matrix"
+      ],
+      "cross_sheet_actual": false,
+      "cross_sheet_ref_count": 0,
+      "referenced_sheets": [],
+      "target_shape": "single_column_series",
+      "layer_sizes": [
+        57,
+        88
+      ],
+      "mask_last_total_cells": 145,
+      "layer_growth_ratios": [
+        1.5439
+      ],
+      "pattern_dominance_ratio": 0.6069,
+      "visible_clone_regions": 89,
+      "nearby_visible_clone_regions": 16,
+      "nearby_visible_clone_rows": 1408,
+      "nearby_visible_clone_ratio": 16.0,
+      "promptability_score": 0.6,
+      "release_reasons": [
+        "parallel_block_leakage"
+      ],
+      "release_verdict": "REBUILD_REQUIRED"
+    }
+  },
+  "difficulty": {
+    "task_id": "single_sheet__dag_a13e38484315",
+    "difficulty_score": 39.6,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 145,
+    "is_cross_sheet": false,
+    "unique_patterns": 2,
+    "avg_complexity": 5.0,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.521,
+    "score_breakdown": {
+      "depth": 7,
+      "cross_sheet": 0,
+      "cell_count": 14.4,
+      "patterns": 6,
+      "complexity": 7.5,
+      "cross_refs": 0,
+      "vis_penalty": 4.8
+    }
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/ground_truth_full.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/ground_truth_full.json
new file mode 100644
index 0000000000000000000000000000000000000000..299153522fd0fd5394a69cb7fb2fe82b4e998997
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/ground_truth_full.json
@@ -0,0 +1,1307 @@
+[
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 193,
+    "formula": "=(AI130-$AI$130)/$AI$130",
+    "cached_value": 0,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 194,
+    "formula": "=(AI131-$AI$130)/$AI$130",
+    "cached_value": -0.07627701242977493,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 195,
+    "formula": "=(AI132-$AI$130)/$AI$130",
+    "cached_value": -0.15792837326134113,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 196,
+    "formula": "=(AI133-$AI$130)/$AI$130",
+    "cached_value": -0.16403317397994038,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 197,
+    "formula": "=(AI134-$AI$130)/$AI$130",
+    "cached_value": -0.2285584549915461,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 198,
+    "formula": "=(AI135-$AI$130)/$AI$130",
+    "cached_value": -0.23309970335993185,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 199,
+    "formula": "=(AI136-$AI$130)/$AI$130",
+    "cached_value": -0.211164113756042,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 200,
+    "formula": "=(AI137-$AI$130)/$AI$130",
+    "cached_value": -0.2890504714600705,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 201,
+    "formula": "=(AI138-$AI$130)/$AI$130",
+    "cached_value": -0.3178490877828361,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
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+    "formula": "=(AI139-$AI$130)/$AI$130",
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+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
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+    "formula": "=(AI140-$AI$130)/$AI$130",
+    "cached_value": -0.37173256200749016,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
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+    "formula": "=(AI141-$AI$130)/$AI$130",
+    "cached_value": -0.36805183999986735,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
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+    "formula": "=(AI142-$AI$130)/$AI$130",
+    "cached_value": -0.3791668870290032,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
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+    "formula": "=(AI143-$AI$130)/$AI$130",
+    "cached_value": -0.4514198347276895,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 207,
+    "formula": "=(AI144-$AI$130)/$AI$130",
+    "cached_value": -0.41225731928352494,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 208,
+    "formula": "=(AI145-$AI$130)/$AI$130",
+    "cached_value": -0.4557458191119573,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 209,
+    "formula": "=(AI146-$AI$130)/$AI$130",
+    "cached_value": -0.47195008414798567,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 210,
+    "formula": "=(AI147-$AI$130)/$AI$130",
+    "cached_value": -0.5119859223242358,
+    "pattern_id": "pf_0079",
+    "layer": 1
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 211,
+    "formula": "=(AI148-$AI$130)/$AI$130",
+    "cached_value": -0.49756877030864466,
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diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/ground_truth_target.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/ground_truth_target.json
new file mode 100644
index 0000000000000000000000000000000000000000..7522105382017d1e36f70787b14d459500cea864
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/ground_truth_target.json
@@ -0,0 +1,458 @@
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+    "cached_value": -0.6612372682055949,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 230,
+    "formula": "=(AI167-$AI$130)/$AI$130",
+    "cached_value": -0.6884736384648954,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 231,
+    "formula": "=(AI168-$AI$130)/$AI$130",
+    "cached_value": -0.6879990589086602,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 232,
+    "formula": "=(AI169-$AI$130)/$AI$130",
+    "cached_value": -0.6891834749118495,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 233,
+    "formula": "=(AI170-$AI$130)/$AI$130",
+    "cached_value": -0.6644649991239451,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 234,
+    "formula": "=(AI171-$AI$130)/$AI$130",
+    "cached_value": -0.6672191533221967,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 235,
+    "formula": "=(AI172-$AI$130)/$AI$130",
+    "cached_value": -0.6777921305828648,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 236,
+    "formula": "=(AI173-$AI$130)/$AI$130",
+    "cached_value": -0.6788061188730826,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 237,
+    "formula": "=(AI174-$AI$130)/$AI$130",
+    "cached_value": -0.6801655864115619,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 238,
+    "formula": "=(AI175-$AI$130)/$AI$130",
+    "cached_value": -0.6845979824860133,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 239,
+    "formula": "=(AI176-$AI$130)/$AI$130",
+    "cached_value": -0.7002433390132472,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 240,
+    "formula": "=(AI177-$AI$130)/$AI$130",
+    "cached_value": -0.715095375184357,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 241,
+    "formula": "=(AI178-$AI$130)/$AI$130",
+    "cached_value": -0.7161230595551662,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 242,
+    "formula": "=(AI179-$AI$130)/$AI$130",
+    "cached_value": -0.7181523595054379,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 243,
+    "formula": "=(AI180-$AI$130)/$AI$130",
+    "cached_value": -0.7240852656432958,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 244,
+    "formula": "=(AI181-$AI$130)/$AI$130",
+    "cached_value": -0.7379015018382165,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 245,
+    "formula": "=(AI182-$AI$130)/$AI$130",
+    "cached_value": -0.7353673283234164,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 246,
+    "formula": "=(AI183-$AI$130)/$AI$130",
+    "cached_value": -0.7279135331377763,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 247,
+    "formula": "=(AI184-$AI$130)/$AI$130",
+    "cached_value": -0.7271960776338492,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 248,
+    "formula": "=(AI185-$AI$130)/$AI$130",
+    "cached_value": -0.7359072313280607,
+    "pattern_id": "pf_0079"
+  },
+  {
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "row": 249,
+    "formula": "=(AI186-$AI$130)/$AI$130",
+    "cached_value": -0.7737114112730031,
+    "pattern_id": "pf_0079"
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/layers.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/layers.json
new file mode 100644
index 0000000000000000000000000000000000000000..620ea1c83d8487e6cc265fad05f613b0f2eb6c5b
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/layers.json
@@ -0,0 +1,210 @@
+{
+  "dag_id": "dag_a13e38484315",
+  "file_id": "joe_parks__14628__Permian0901",
+  "category": "single_sheet",
+  "surface_category": "single_sheet",
+  "effective_category": "single_sheet",
+  "depth": 2,
+  "quality": {
+    "chain_error_cells": 0,
+    "chain_external_cells": 0,
+    "is_clean": true
+  },
+  "layers": [
+    {
+      "layer_index": 1,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00168"
+          ],
+          "sheet": "Permian Matrix",
+          "col": "AI",
+          "rows": [
+            193,
+            194,
+            195,
+            196,
+            197,
+            198,
+            199,
+            200,
+            201,
+            202,
+            203,
+            204,
+            205,
+            206,
+            207,
+            208,
+            209,
+            210,
+            211,
+            212,
+            213,
+            214,
+            215,
+            216,
+            217,
+            218,
+            219,
+            220,
+            221,
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+            223,
+            224,
+            225,
+            226,
+            227,
+            228,
+            229,
+            230,
+            231,
+            232,
+            233,
+            234,
+            235,
+            236,
+            237,
+            238,
+            239,
+            240,
+            241,
+            242,
+            243,
+            244,
+            245,
+            246,
+            247,
+            248,
+            249
+          ],
+          "row_ranges": "193-249",
+          "row_count": 57,
+          "pattern_id": "pf_0079",
+          "normalized_pattern": "=([C,R-63]-[$AI,$130])/[$AI,$130]",
+          "sample_formula": "=(AI130-$AI$130)/$AI$130"
+        }
+      ],
+      "new_eval_cells": 57,
+      "total_masked_cells": 57
+    },
+    {
+      "layer_index": 2,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00032"
+          ],
+          "sheet": "Permian Matrix",
+          "col": "AI",
+          "rows": [
+            99,
+            100,
+            101,
+            102,
+            103,
+            104,
+            105,
+            106,
+            107,
+            108,
+            109,
+            110,
+            111,
+            112,
+            113,
+            114,
+            115,
+            116,
+            117,
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+            120,
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+            122,
+            123,
+            124,
+            125,
+            126,
+            127,
+            128,
+            129,
+            130,
+            131,
+            132,
+            133,
+            134,
+            135,
+            136,
+            137,
+            138,
+            139,
+            140,
+            141,
+            142,
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+            146,
+            147,
+            148,
+            149,
+            150,
+            151,
+            152,
+            153,
+            154,
+            155,
+            156,
+            157,
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+            159,
+            160,
+            161,
+            162,
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+            169,
+            170,
+            171,
+            172,
+            173,
+            174,
+            175,
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+            177,
+            178,
+            179,
+            180,
+            181,
+            182,
+            183,
+            184,
+            185,
+            186
+          ],
+          "row_ranges": "99-186",
+          "row_count": 88,
+          "pattern_id": "pf_0000",
+          "normalized_pattern": "=([C,R-96]/1000000)/[$A,R]",
+          "sample_formula": "=(AI3/1000000)/$A99"
+        }
+      ],
+      "new_eval_cells": 88,
+      "total_masked_cells": 145
+    }
+  ],
+  "sink": {
+    "region_id": "rg_00168",
+    "sheet": "Permian Matrix",
+    "col": "AI",
+    "pattern_id": "pf_0079",
+    "row_count": 57,
+    "family_size": 57
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/nl_task.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/nl_task.json
new file mode 100644
index 0000000000000000000000000000000000000000..2780bd9e95d65c062658b81884117768967aa01b
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/nl_task.json
@@ -0,0 +1,26 @@
+{
+  "task_id": "single_sheet__dag_a13e38484315",
+  "prompt_en": "On the \"Permian Matrix\" sheet, the matrix is laid out with period-style headers such as \"Pre 94\", \"1850-1930\", \"1931-1950\", \"1951-1956\", \"1957-1960\", \"1961-1965\", and \"1966-1968\". I’m finalizing the report and the blank entries in the \"-\" column need to be completed for rows 193 through 249, which is range AI193:AI249. Some of the other blank columns in this sheet feed naturally into the \"-\" column, so those related entries need to be in place before the \"-\" column is meaningful. Please fill in the missing values and save the completed workbook as an .xlsx file.",
+  "prompt_cn": "在“Permian Matrix”工作表中，这个矩阵按类似时期的表头排列，例如“Pre 94”、“1850-1930”、“1931-1950”、“1951-1956”、“1957-1960”、“1961-1965”和“1966-1968”。我正在整理这份报告，其中“-”列第193行到第249行的空白项需要补全，也就是范围 AI193:AI249。表中其他一些空白列会自然关联到“-”列，因此这些相关内容需要先补齐后，“-”列才有意义。请填入缺失值，并将完成后的工作簿保存为 .xlsx 文件。",
+  "quality_notes": "The prompt is minimal, references only visible sheet and header information, identifies the target column and range, mentions the prerequisite relationship without explaining operations, and ends with the required .xlsx save instruction.",
+  "post_check_issues": [],
+  "prompt_mode": "minimal",
+  "hint_leakage": {
+    "score": 4,
+    "level": "low",
+    "max_possible": 100,
+    "dimensions": {
+      "operation_words": 0,
+      "cell_range_density": 4,
+      "step_by_step": 0,
+      "column_operation_mapping": 0,
+      "formula_pattern_hints": 0
+    },
+    "operation_words_found": [],
+    "cell_ranges_found": 1
+  },
+  "version": "v7",
+  "model": "gpt-5.5",
+  "elapsed": 37.5,
+  "attempt": 1
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/release_qc.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/release_qc.json
new file mode 100644
index 0000000000000000000000000000000000000000..53283ed791de35772993f6d66e28801598fc41c2
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/release_qc.json
@@ -0,0 +1,58 @@
+{
+  "binary": true,
+  "binary_reason": "CORRECT: The mask is clean, all cells are real, GT formulas are consistent, and the dependency chain is reconstructible from visible neighboring formula patterns.",
+  "D1": {
+    "score": 5,
+    "reason": "All 145 contract cells are truly masked and there are no extra masked cells outside the contract. The referenced ranges are within the actual sheet dimensions. Although there are many visible neighboring exemplars, the final AI193:AI249 formulas are not a zero-reasoning row-copy because the denominator/base row must be inferred from the adjacent-column diagonal pattern; the mask boundary is clean."
+  },
+  "D2": {
+    "score": 5,
+    "reason": "The ground-truth formulas match the visible source pattern: AI99:AI186 compute normalized values from rows 3:90, and AI193:AI249 compute relative change against the AI130 baseline. The shown cached values are consistent with the formulas, and the formulas are deterministic."
+  },
+  "D3": {
+    "score": 4,
+    "reason": "The NL clearly identifies the sheet and the final target range AI193:AI249. It also hints that prerequisite blanks feed the target. The wording about the '-' column is somewhat indirect because the visible column header is date-like while '-' appears as a section/header label, but the explicit range removes practical ambiguity."
+  },
+  "D4": {
+    "score": 5,
+    "reason": "Using only mask_last.xlsx and the NL prompt, the required patterns are reconstructible. For AI99:AI186, adjacent visible columns show the exact same normalized formula structure, making the same-column prerequisite pattern clear. For AI193:AI249, adjacent columns AA:AH and AJ:AQ show the relative-change pattern and the column-dependent baseline row progression, from which AI's baseline row 130 and the numerator sequence AI130:AI186 can be inferred. No hidden constants or external references are needed.",
+    "d4_type": "ok"
+  },
+  "D5": {
+    "score": 5,
+    "reason": "The source workbook appears structurally sound: formulas are consistent across the matrix, headers are meaningful and aligned, no broken references or circular-reference symptoms are indicated, and automated checks report a clean chain."
+  },
+  "D6": {
+    "score": 5,
+    "reason": "The NL reads like a plausible workplace request to finish a report. It avoids benchmark-specific terminology and provides contextual framing while naming the needed sheet and range."
+  },
+  "total": 29,
+  "verdict": "RELEASE",
+  "verdict_reason": "High-quality task: clean masking, valid GT, sufficient visible evidence for both formula layers, and no source-data issues. The task is challenging enough to require dependency-chain reasoning but not under-specified.",
+  "frontier_hardness": {
+    "score": 2,
+    "reason": "A frontier model would likely succeed because the workbook exposes strong adjacent-column formula exemplars for both the prerequisite normalization layer and the final relative-change layer. The main reasoning step is inferring the AI baseline row from the diagonal neighboring-column pattern, but there are no cross-sheet dependencies, hidden constants, or many competing formula patterns.",
+    "fail_reason": "easy",
+    "is_valid_hardness": false
+  },
+  "_prompt_chars": 155606,
+  "_timing_load_workbooks": 1.64,
+  "_timing_context": 0.08,
+  "_timing_api": 59.22,
+  "local_difficulty": {
+    "difficulty_score": 39.6,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 145,
+    "is_cross_sheet": false,
+    "unique_patterns": 2,
+    "avg_complexity": 5,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.521
+  },
+  "task_id": "single_sheet__dag_a13e38484315",
+  "elapsed": 60.9,
+  "publish_decision": "YES",
+  "release_tier": "GOLD",
+  "hard_block_reasons": []
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/target_contract.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/target_contract.json
new file mode 100644
index 0000000000000000000000000000000000000000..fc8565de19734008290a780028a372cb74c98e63
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/target_contract.json
@@ -0,0 +1,194 @@
+{
+  "task_id": "single_sheet__dag_a13e38484315",
+  "category": "single_sheet",
+  "depth": 2,
+  "final_target": {
+    "regions": [
+      {
+        "sheet": "Permian Matrix",
+        "column": "AI",
+        "column_header": "-",
+        "cell_range": "AI193:AI249",
+        "cell_count": 57,
+        "rows": [
+          193,
+          194,
+          195,
+          196,
+          197,
+          198,
+          199,
+          200,
+          201,
+          202,
+          203,
+          204,
+          205,
+          206,
+          207,
+          208,
+          209,
+          210,
+          211,
+          212,
+          213,
+          214,
+          215,
+          216,
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+          218,
+          219,
+          220,
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+          236,
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+          238,
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+          240,
+          241,
+          242,
+          243,
+          244,
+          245,
+          246,
+          247,
+          248,
+          249
+        ],
+        "first_row_label": "month 1",
+        "last_row_label": "month 57"
+      }
+    ],
+    "cell_count": 57,
+    "formula_families": [
+      "arithmetic"
+    ]
+  },
+  "prerequisite_steps": [
+    {
+      "layer": 2,
+      "regions": [
+        {
+          "sheet": "Permian Matrix",
+          "column": "AI",
+          "column_header": "-",
+          "cell_range": "AI99:AI186",
+          "cell_count": 88,
+          "rows": [
+            99,
+            100,
+            101,
+            102,
+            103,
+            104,
+            105,
+            106,
+            107,
+            108,
+            109,
+            110,
+            111,
+            112,
+            113,
+            114,
+            115,
+            116,
+            117,
+            118,
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+            170,
+            171,
+            172,
+            173,
+            174,
+            175,
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+            177,
+            178,
+            179,
+            180,
+            181,
+            182,
+            183,
+            184,
+            185,
+            186
+          ],
+          "first_row_label": "",
+          "last_row_label": ""
+        }
+      ],
+      "cell_count": 88
+    }
+  ],
+  "total_prerequisite_cells": 88,
+  "total_masked_cells": 145,
+  "ratio_total_vs_final": 2.5,
+  "sheets_involved": [
+    "Permian Matrix"
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/task_meta.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/task_meta.json
new file mode 100644
index 0000000000000000000000000000000000000000..9f1dae142c519099f16e935cfb4d9539c45c118d
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02277/task_meta.json
@@ -0,0 +1,46 @@
+{
+  "fcb_id": "FCB-02277",
+  "task_id": "single_sheet__dag_a13e38484315",
+  "tier": "T3_MEDIUM",
+  "category": "single_sheet",
+  "depth": 2,
+  "total_masked": 145,
+  "is_cross_sheet": false,
+  "prompt_en": "On the \"Permian Matrix\" sheet, the matrix is laid out with period-style headers such as \"Pre 94\", \"1850-1930\", \"1931-1950\", \"1951-1956\", \"1957-1960\", \"1961-1965\", and \"1966-1968\". I’m finalizing the report and the blank entries in the \"-\" column need to be completed for rows 193 through 249, which is range AI193:AI249. Some of the other blank columns in this sheet feed naturally into the \"-\" column, so those related entries need to be in place before the \"-\" column is meaningful. Please fill in the missing values and save the completed workbook as an .xlsx file.",
+  "prompt_cn": "在“Permian Matrix”工作表中，这个矩阵按类似时期的表头排列，例如“Pre 94”、“1850-1930”、“1931-1950”、“1951-1956”、“1957-1960”、“1961-1965”和“1966-1968”。我正在整理这份报告，其中“-”列第193行到第249行的空白项需要补全，也就是范围 AI193:AI249。表中其他一些空白列会自然关联到“-”列，因此这些相关内容需要先补齐后，“-”列才有意义。请填入缺失值，并将完成后的工作簿保存为 .xlsx 文件。",
+  "qc": {
+    "total": 29,
+    "verdict": "RELEASE",
+    "D1": 5,
+    "D2": 5,
+    "D3": 4,
+    "D4": 5,
+    "D5": 5,
+    "D6": 5,
+    "frontier_hardness": 2,
+    "local_difficulty": 39.6
+  },
+  "source_file_id": "joe_parks__14628__Permian0901",
+  "inferred_domain": "general",
+  "domain_confidence": 0.0,
+  "sheet_profiles": [
+    {
+      "name": "Permian Matrix",
+      "used_range": "A1:GH2496",
+      "row_count": 2496,
+      "col_count": 190,
+      "has_header": false,
+      "title_hint": "Permian Matrix",
+      "header_info": null
+    },
+    {
+      "name": "Sheet2",
+      "used_range": "A1:DZ306",
+      "row_count": 306,
+      "col_count": 130,
+      "has_header": false,
+      "title_hint": "Sheet2",
+      "header_info": null
+    }
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02297/src.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02297/src.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..2c3046cb228eb01e00b2b3f0f2f10451bf57e58e
Binary files /dev/null and b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02297/src.xlsx differ
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/audit.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/audit.json
new file mode 100644
index 0000000000000000000000000000000000000000..bc51eb51d8e8c5b1960c2b5f6486f2fc87eecdc4
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/audit.json
@@ -0,0 +1,411 @@
+{
+  "gate": {
+    "pre_nl_gate": {
+      "gate_label": "GATE_PASS",
+      "gate_pass": true,
+      "hard_fails": 0,
+      "warns": 0,
+      "checks": [
+        {
+          "check": "final_target_gate",
+          "pass": true,
+          "detail": "final_target has 7 cells"
+        },
+        {
+          "check": "header_grounding",
+          "pass": true,
+          "severity": "pass",
+          "detail": "1/1 final regions have column_header"
+        },
+        {
+          "check": "mask_consistency",
+          "pass": true,
+          "detail": "mask_last=73515B, src=97098B"
+        },
+        {
+          "check": "dirty_family",
+          "pass": true,
+          "detail": "0 dirty cells"
+        },
+        {
+          "check": "ratio_gate",
+          "pass": true,
+          "detail": "ratio=2.0 (total=14, final=7)"
+        },
+        {
+          "check": "dedup_gate",
+          "pass": true,
+          "detail": "0 duplicate cells across layers"
+        },
+        {
+          "check": "gt_uniqueness",
+          "pass": true,
+          "detail": "12 unique values across 14 cells"
+        },
+        {
+          "check": "tail_artifact",
+          "pass": true,
+          "detail": "0 bad values"
+        },
+        {
+          "check": "unrecoverable_leaf",
+          "pass": true,
+          "detail": "clean",
+          "hidden_const_cells": []
+        },
+        {
+          "check": "adjacent_column_leak",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "header_name_accuracy",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "duplicate_lookup_tie_break",
+          "pass": true,
+          "detail": "no lookup formulas"
+        },
+        {
+          "check": "src_chain_integrity",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean",
+          "sub_checks": {
+            "error_cells": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "external_refs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "volatile_funcs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "missing_sheets": {
+              "pass": true,
+              "count": 0,
+              "sheets": []
+            },
+            "circular_refs": {
+              "pass": true,
+              "cycle_cells": []
+            }
+          }
+        },
+        {
+          "check": "uniqueness_deep",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean"
+        }
+      ]
+    },
+    "post_nl_validate": {
+      "validate_label": "SOFT_WARN",
+      "validate_pass": true,
+      "hard_fails": 0,
+      "soft_warns": 1,
+      "checks": [
+        {
+          "check": "cell_range_match",
+          "pass": true,
+          "detail": "contract=2, prompt=5, missing=0",
+          "missing_ranges": [],
+          "severity": "OK"
+        },
+        {
+          "check": "cell_count_match",
+          "pass": true,
+          "detail": "no explicit total found; skipping (natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "step_count_match",
+          "pass": true,
+          "detail": "contract=1, no explicit steps found (v5 natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "sheet_name_match",
+          "pass": true,
+          "detail": "contract=['Power West Price Off-Peak'], missing=[]",
+          "severity": "OK"
+        },
+        {
+          "check": "no_formula_leak",
+          "pass": true,
+          "detail": "0 formula leaks",
+          "severity": "OK"
+        },
+        {
+          "check": "no_value_leak",
+          "pass": true,
+          "detail": "0 value leaks out of 7 GT cells",
+          "severity": "OK"
+        },
+        {
+          "check": "final_target_first",
+          "pass": true,
+          "detail": "no explicit final target marker (natural format)",
+          "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=1 mentioned=0 missing=1 [P2]",
+          "severity": "SOFT_WARN"
+        },
+        {
+          "check": "exemplar_consistency",
+          "pass": true,
+          "severity": "OK",
+          "detail": "checked 1 col groups"
+        },
+        {
+          "check": "nl_gt_operation_consistency",
+          "pass": true,
+          "detail": "GT funcs: ['AVERAGE']",
+          "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 14 GT cells (0%)",
+          "severity": "OK"
+        }
+      ]
+    },
+    "pre_nl_local": {
+      "local_total": 55,
+      "local_label": "PENDING_NL",
+      "hard_fail_flags": [],
+      "warnings": [
+        "nl_missing"
+      ],
+      "local_subscores": {
+        "family_clean": 25,
+        "target_integrity": 15,
+        "taxonomy": 10,
+        "semantic_signal": 5,
+        "nl_schema": 0,
+        "target_alignment": 0,
+        "business_specificity": 0,
+        "nl_risk": 0
+      }
+    }
+  },
+  "verify": {
+    "uniqueness": {
+      "total_gt_cells": 14,
+      "total_non_none": 14,
+      "block_reasons": [],
+      "warnings": [
+        "mixed_gt_types:{'float': 12, 'int': 2}"
+      ],
+      "checks": {
+        "rank_tie_risk": {
+          "rank_cells": 0,
+          "tie_issues": 0,
+          "details": []
+        },
+        "trivial_gt": {
+          "issues": []
+        },
+        "gt_type_consistency": {
+          "types": {
+            "float": 12,
+            "int": 2
+          },
+          "mixed": true
+        },
+        "empty_gt": {
+          "count": 0,
+          "details": []
+        }
+      }
+    },
+    "src_chain": {
+      "hard_block": false,
+      "block_reasons": [],
+      "checks": {
+        "error_cells": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "external_refs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "volatile_funcs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "missing_sheets": {
+          "pass": true,
+          "count": 0,
+          "sheets": []
+        },
+        "circular_refs": {
+          "pass": true,
+          "cycle_cells": []
+        }
+      },
+      "required_chain_scope": {
+        "external_ref_in_required_chain": 0,
+        "external_ref_in_other": 0,
+        "error_cells_in_required_chain": 0,
+        "error_cells_in_other": 0,
+        "required_chain_cells": 14
+      }
+    },
+    "solver_visibility": {
+      "contract_cells": 14,
+      "total_masked": 14,
+      "total_visible": 4912,
+      "depth": 2,
+      "block_reasons": [],
+      "warnings": [],
+      "checks": {
+        "broken_chains": {
+          "count": 0,
+          "checked": 14,
+          "details": []
+        },
+        "orphan_masks": {
+          "count": 0,
+          "details": []
+        },
+        "self_contained": {
+          "missing_sheets": []
+        }
+      }
+    },
+    "exemplar": {
+      "soft_block": false,
+      "block_reasons": [],
+      "checks": {
+        "pattern_coverage": {
+          "pass": true,
+          "total_gt_patterns": 2,
+          "total_src_patterns": 9,
+          "zero_exemplar_count": 0,
+          "low_exemplar_count": 0
+        },
+        "zero_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "low_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "func_coverage": {
+          "AVERAGE": {
+            "total_masked": 7,
+            "visible_exemplars": 189
+          },
+          "arithmetic": {
+            "total_masked": 7,
+            "visible_exemplars": 936
+          }
+        }
+      }
+    },
+    "shortcut": {
+      "shortcut_risk": 0.0,
+      "flags": []
+    },
+    "release_audit": {
+      "surface_single_sheet": true,
+      "surface_sheets": [
+        "Power West Price Off-Peak"
+      ],
+      "cross_sheet_actual": true,
+      "cross_sheet_ref_count": 21,
+      "referenced_sheets": [
+        "P2"
+      ],
+      "target_shape": "summary_block",
+      "layer_sizes": [
+        7,
+        7
+      ],
+      "mask_last_total_cells": 14,
+      "layer_growth_ratios": [
+        1.0
+      ],
+      "pattern_dominance_ratio": 0.5,
+      "visible_clone_regions": 0,
+      "nearby_visible_clone_regions": 0,
+      "nearby_visible_clone_rows": 0,
+      "nearby_visible_clone_ratio": 0.0,
+      "promptability_score": 0.92,
+      "release_reasons": [
+        "cross_sheet_metadata_mismatch"
+      ],
+      "release_verdict": "KEEP_WITH_FIXES"
+    }
+  },
+  "difficulty": {
+    "task_id": "cross_sheet__dag_bb6e52ccefbe",
+    "difficulty_score": 49.2,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 14,
+    "is_cross_sheet": true,
+    "unique_patterns": 2,
+    "avg_complexity": 5.0,
+    "cross_refs": 7,
+    "visible_exemplar_ratio": 0.588,
+    "score_breakdown": {
+      "depth": 7,
+      "cross_sheet": 10,
+      "cell_count": 7.6,
+      "patterns": 6,
+      "complexity": 7.5,
+      "cross_refs": 7,
+      "vis_penalty": 4.1
+    }
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/ground_truth_full.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/ground_truth_full.json
new file mode 100644
index 0000000000000000000000000000000000000000..819447566e78967d06f493495fcec374cc4e44eb
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/ground_truth_full.json
@@ -0,0 +1,128 @@
+[
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 16,
+    "formula": "=O4-O27",
+    "cached_value": -2.0870967741935402,
+    "pattern_id": "pf_0001",
+    "layer": 1
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 17,
+    "formula": "=O5-O28",
+    "cached_value": -2.741935483870975,
+    "pattern_id": "pf_0001",
+    "layer": 1
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 18,
+    "formula": "=O6-O29",
+    "cached_value": -1.225806451612904,
+    "pattern_id": "pf_0001",
+    "layer": 1
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 19,
+    "formula": "=O7-O30",
+    "cached_value": 0,
+    "pattern_id": "pf_0001",
+    "layer": 1
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 20,
+    "formula": "=O8-O31",
+    "cached_value": -1.225806451612911,
+    "pattern_id": "pf_0001",
+    "layer": 1
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 21,
+    "formula": "=O9-O32",
+    "cached_value": -2.451612903225808,
+    "pattern_id": "pf_0001",
+    "layer": 1
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 22,
+    "formula": "=O10-O33",
+    "cached_value": -2.451612903225808,
+    "pattern_id": "pf_0001",
+    "layer": 1
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 4,
+    "formula": "=AVERAGE('P2'!AC5:AE5)",
+    "cached_value": 76.95483870967742,
+    "pattern_id": "pf_0132",
+    "layer": 2
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 5,
+    "formula": "=AVERAGE('P2'!AC7:AE7)",
+    "cached_value": 95.33763440860214,
+    "pattern_id": "pf_0145",
+    "layer": 2
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 6,
+    "formula": "=AVERAGE('P2'!AC9:AE9)",
+    "cached_value": 38.189247311827955,
+    "pattern_id": "pf_0158",
+    "layer": 2
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 7,
+    "formula": "=AVERAGE('P2'!AC11:AE11)",
+    "cached_value": 46,
+    "pattern_id": "pf_0171",
+    "layer": 2
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 8,
+    "formula": "=AVERAGE('P2'!AC13:AE13)",
+    "cached_value": 37.69892473118279,
+    "pattern_id": "pf_0184",
+    "layer": 2
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 9,
+    "formula": "=AVERAGE('P2'!AC15:AE15)",
+    "cached_value": 46.225806451612904,
+    "pattern_id": "pf_0197",
+    "layer": 2
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 10,
+    "formula": "=AVERAGE('P2'!AC17:AE17)",
+    "cached_value": 46.225806451612904,
+    "pattern_id": "pf_0211",
+    "layer": 2
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/ground_truth_target.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/ground_truth_target.json
new file mode 100644
index 0000000000000000000000000000000000000000..ecf064d3fbf0a6ed2e89b6b5c54f972dfdcb1f5b
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/ground_truth_target.json
@@ -0,0 +1,58 @@
+[
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 16,
+    "formula": "=O4-O27",
+    "cached_value": -2.0870967741935402,
+    "pattern_id": "pf_0001"
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 17,
+    "formula": "=O5-O28",
+    "cached_value": -2.741935483870975,
+    "pattern_id": "pf_0001"
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 18,
+    "formula": "=O6-O29",
+    "cached_value": -1.225806451612904,
+    "pattern_id": "pf_0001"
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 19,
+    "formula": "=O7-O30",
+    "cached_value": 0,
+    "pattern_id": "pf_0001"
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 20,
+    "formula": "=O8-O31",
+    "cached_value": -1.225806451612911,
+    "pattern_id": "pf_0001"
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 21,
+    "formula": "=O9-O32",
+    "cached_value": -2.451612903225808,
+    "pattern_id": "pf_0001"
+  },
+  {
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "row": 22,
+    "formula": "=O10-O33",
+    "cached_value": -2.451612903225808,
+    "pattern_id": "pf_0001"
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/layers.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/layers.json
new file mode 100644
index 0000000000000000000000000000000000000000..902483b45466026fe4156f55108330722d5ef6d3
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/layers.json
@@ -0,0 +1,163 @@
+{
+  "dag_id": "dag_bb6e52ccefbe",
+  "file_id": "matthew_lenhart__26347__West Prices0608-01",
+  "category": "cross_sheet",
+  "surface_category": "single_sheet",
+  "effective_category": "cross_sheet",
+  "depth": 2,
+  "quality": {
+    "chain_error_cells": 0,
+    "chain_external_cells": 0,
+    "is_clean": true
+  },
+  "layers": [
+    {
+      "layer_index": 1,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00032"
+          ],
+          "sheet": "Power West Price Off-Peak",
+          "col": "O",
+          "rows": [
+            16,
+            17,
+            18,
+            19,
+            20,
+            21,
+            22
+          ],
+          "row_ranges": "16-22",
+          "row_count": 7,
+          "pattern_id": "pf_0001",
+          "normalized_pattern": "=[C,R-12]-[C,R+11]",
+          "sample_formula": "=O4-O27"
+        }
+      ],
+      "new_eval_cells": 7,
+      "total_masked_cells": 7
+    },
+    {
+      "layer_index": 2,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00286"
+          ],
+          "sheet": "Power West Price Off-Peak",
+          "col": "O",
+          "rows": [
+            4
+          ],
+          "row_ranges": "4",
+          "row_count": 1,
+          "pattern_id": "pf_0132",
+          "normalized_pattern": "=AVERAGE('P2'![C+14,R+1]:[C+16,R+1])",
+          "sample_formula": "=AVERAGE('P2'!AC5:AE5)"
+        },
+        {
+          "region_ids": [
+            "rg_00299"
+          ],
+          "sheet": "Power West Price Off-Peak",
+          "col": "O",
+          "rows": [
+            5
+          ],
+          "row_ranges": "5",
+          "row_count": 1,
+          "pattern_id": "pf_0145",
+          "normalized_pattern": "=AVERAGE('P2'![C+14,R+2]:[C+16,R+2])",
+          "sample_formula": "=AVERAGE('P2'!AC7:AE7)"
+        },
+        {
+          "region_ids": [
+            "rg_00312"
+          ],
+          "sheet": "Power West Price Off-Peak",
+          "col": "O",
+          "rows": [
+            6
+          ],
+          "row_ranges": "6",
+          "row_count": 1,
+          "pattern_id": "pf_0158",
+          "normalized_pattern": "=AVERAGE('P2'![C+14,R+3]:[C+16,R+3])",
+          "sample_formula": "=AVERAGE('P2'!AC9:AE9)"
+        },
+        {
+          "region_ids": [
+            "rg_00325"
+          ],
+          "sheet": "Power West Price Off-Peak",
+          "col": "O",
+          "rows": [
+            7
+          ],
+          "row_ranges": "7",
+          "row_count": 1,
+          "pattern_id": "pf_0171",
+          "normalized_pattern": "=AVERAGE('P2'![C+14,R+4]:[C+16,R+4])",
+          "sample_formula": "=AVERAGE('P2'!AC11:AE11)"
+        },
+        {
+          "region_ids": [
+            "rg_00338"
+          ],
+          "sheet": "Power West Price Off-Peak",
+          "col": "O",
+          "rows": [
+            8
+          ],
+          "row_ranges": "8",
+          "row_count": 1,
+          "pattern_id": "pf_0184",
+          "normalized_pattern": "=AVERAGE('P2'![C+14,R+5]:[C+16,R+5])",
+          "sample_formula": "=AVERAGE('P2'!AC13:AE13)"
+        },
+        {
+          "region_ids": [
+            "rg_00351"
+          ],
+          "sheet": "Power West Price Off-Peak",
+          "col": "O",
+          "rows": [
+            9
+          ],
+          "row_ranges": "9",
+          "row_count": 1,
+          "pattern_id": "pf_0197",
+          "normalized_pattern": "=AVERAGE('P2'![C+14,R+6]:[C+16,R+6])",
+          "sample_formula": "=AVERAGE('P2'!AC15:AE15)"
+        },
+        {
+          "region_ids": [
+            "rg_00365"
+          ],
+          "sheet": "Power West Price Off-Peak",
+          "col": "O",
+          "rows": [
+            10
+          ],
+          "row_ranges": "10",
+          "row_count": 1,
+          "pattern_id": "pf_0211",
+          "normalized_pattern": "=AVERAGE('P2'![C+14,R+7]:[C+16,R+7])",
+          "sample_formula": "=AVERAGE('P2'!AC17:AE17)"
+        }
+      ],
+      "new_eval_cells": 7,
+      "total_masked_cells": 14
+    }
+  ],
+  "sink": {
+    "region_id": "rg_00032",
+    "sheet": "Power West Price Off-Peak",
+    "col": "O",
+    "pattern_id": "pf_0001",
+    "row_count": 7,
+    "family_size": 7
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/mask_last.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/mask_last.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..a3e2fe9247f4b852d8017b15b2ac2ba32343ac7f
Binary files /dev/null and b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/mask_last.xlsx differ
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/nl_task.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/nl_task.json
new file mode 100644
index 0000000000000000000000000000000000000000..5a3e6e1b73590666f4841fc53be28e366f0547a3
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/nl_task.json
@@ -0,0 +1,26 @@
+{
+  "task_id": "cross_sheet__dag_bb6e52ccefbe",
+  "prompt_en": "The Power West Price Off-Peak sheet is part of the engineering price compilation, with regional rows such as MID-COLUMBIA, COB, and NP15 and period headers like Q4-01, Cal-01, and Q1-02. Please complete the blank entries in the Q3-02 column on that sheet, specifically cells O16:O22. The related period price entries in the workbook should be in place first, since this Q3-02 column needs to fit with the surrounding visible price columns. Save the completed workbook as an .xlsx file.",
+  "prompt_cn": "“Power West Price Off-Peak” 工作表是这份工程价格资料整理的一部分，里面有 MID-COLUMBIA、COB、NP15 等区域行，以及 Q4-01、Cal-01、Q1-02 等期间标题。请补全该工作表中 Q3-02 列的空白内容，位置是 O16:O22。工作簿中相关期间的价格条目应先补齐，因为这个 Q3-02 列需要与周围可见的价格列保持一致。请将完成后的工作簿保存为 .xlsx 文件。",
+  "quality_notes": "The prompt names the relevant sheet, column, and cell range, frames the workbook as an engineering price compilation using visible labels, and mentions prerequisite context without giving operational hints or formulas.",
+  "post_check_issues": [],
+  "prompt_mode": "minimal",
+  "hint_leakage": {
+    "score": 7,
+    "level": "low",
+    "max_possible": 100,
+    "dimensions": {
+      "operation_words": 0,
+      "cell_range_density": 7,
+      "step_by_step": 0,
+      "column_operation_mapping": 0,
+      "formula_pattern_hints": 0
+    },
+    "operation_words_found": [],
+    "cell_ranges_found": 1
+  },
+  "version": "v7",
+  "model": "gpt-5.5",
+  "elapsed": 25.5,
+  "attempt": 1
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/release_qc.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/release_qc.json
new file mode 100644
index 0000000000000000000000000000000000000000..cb4b6b47cf2460c9631c49be45c1f6e0021174dd
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/release_qc.json
@@ -0,0 +1,58 @@
+{
+  "binary": true,
+  "binary_reason": "Well-designed: the masked cells are real and cleanly bounded, GT is consistent, and visible adjacent formulas provide enough evidence to reconstruct the prerequisite and final formulas.",
+  "D1": {
+    "score": 5,
+    "reason": "All 14 contract cells are real cells within the Power West Price Off-Peak sheet, and the diff summary shows exactly 14 truly masked cells with no contract misses and no extra masking. The prerequisite masking is consistent with the chain-masking design. There are visible adjacent-column exemplars, but they do not reduce the whole task to zero-reasoning copying because the solver must also infer the cross-sheet Q3-02 prerequisite formulas in O4:O10 from the surrounding period structure."
+  },
+  "D2": {
+    "score": 5,
+    "reason": "The layer-1 GT formulas are consistent with the surrounding source formulas: O16:O22 subtract the lower price block O27:O33 from the corresponding upper/prerequisite values O4:O10. The formulas are deterministic and match the cached values shown for the final targets."
+  },
+  "D3": {
+    "score": 4,
+    "reason": "The NL clearly identifies the target sheet, Q3-02 column, and final cells O16:O22. It also hints that related period price entries need to be completed first, which points toward the masked prerequisites. However, it does not explicitly name O4:O10, so the dependency-chain requirement is somewhat indirect."
+  },
+  "D4": {
+    "score": 5,
+    "reason": "Using only mask_last.xlsx and the NL, the task is reconstructible. For O16:O22, the same subtraction pattern is visible across adjacent columns in rows 16:22. For O4:O10, adjacent formulas in the same rows show the cross-sheet P2 period mapping, and the visible headers identify O as Q3-02 between Q2-02 and Q4-02; the surrounding formulas imply the missing references should be the next three-month block AC:AE on P2 for the corresponding rows. Thus all root evidence for both needed formula patterns is visible.",
+    "d4_type": "ok"
+  },
+  "D5": {
+    "score": 4,
+    "reason": "The relevant source data for Power West Price Off-Peak and P2 appears internally consistent, with meaningful period headers and coherent formulas. The workbook overview shows some #REF! headers on unrelated Tim sheets, which is a minor source-quality blemish, but there is no evidence that it affects this task’s target or prerequisite chain."
+  },
+  "D6": {
+    "score": 5,
+    "reason": "The NL reads like a realistic workplace request about completing an engineering price compilation workbook. It avoids benchmark jargon and gives natural context about regional rows and period headers."
+  },
+  "total": 28,
+  "verdict": "RELEASE",
+  "verdict_reason": "High-quality task: clean masking, correct GT, sufficient visible evidence for the dependency chain, and only minor NL/source-quality reservations that do not undermine solvability.",
+  "frontier_hardness": {
+    "score": 2,
+    "reason": "This is a short depth-2 chain with two formula patterns and strong adjacent-column exemplars. A frontier model should be able to infer the missing Q3-02 prerequisite averages from the surrounding P2 references and then apply the visible subtraction pattern for O16:O22.",
+    "fail_reason": "easy",
+    "is_valid_hardness": false
+  },
+  "_prompt_chars": 40304,
+  "_timing_load_workbooks": 0.36,
+  "_timing_context": 0.11,
+  "_timing_api": 30.25,
+  "local_difficulty": {
+    "difficulty_score": 49.2,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 14,
+    "is_cross_sheet": true,
+    "unique_patterns": 2,
+    "avg_complexity": 5,
+    "cross_refs": 7,
+    "visible_exemplar_ratio": 0.588
+  },
+  "task_id": "cross_sheet__dag_bb6e52ccefbe",
+  "elapsed": 30.7,
+  "publish_decision": "YES",
+  "release_tier": "GOLD",
+  "hard_block_reasons": []
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/target_contract.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/target_contract.json
new file mode 100644
index 0000000000000000000000000000000000000000..1ae0d29e03b8947154a870aa9d6f1d9c12dcbc94
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/target_contract.json
@@ -0,0 +1,63 @@
+{
+  "task_id": "cross_sheet__dag_bb6e52ccefbe",
+  "category": "cross_sheet",
+  "depth": 2,
+  "final_target": {
+    "regions": [
+      {
+        "sheet": "Power West Price Off-Peak",
+        "column": "O",
+        "column_header": "Q3-02",
+        "cell_range": "O16:O22",
+        "cell_count": 7,
+        "rows": [
+          16,
+          17,
+          18,
+          19,
+          20,
+          21,
+          22
+        ],
+        "first_row_label": "MID-COLUMBIA",
+        "last_row_label": "ROCKIES"
+      }
+    ],
+    "cell_count": 7,
+    "formula_families": [
+      "arithmetic"
+    ]
+  },
+  "prerequisite_steps": [
+    {
+      "layer": 2,
+      "regions": [
+        {
+          "sheet": "Power West Price Off-Peak",
+          "column": "O",
+          "column_header": "Q3-02",
+          "cell_range": "O4:O10",
+          "cell_count": 7,
+          "rows": [
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10
+          ],
+          "first_row_label": "MID-COLUMBIA",
+          "last_row_label": "ROCKIES"
+        }
+      ],
+      "cell_count": 7
+    }
+  ],
+  "total_prerequisite_cells": 7,
+  "total_masked_cells": 14,
+  "ratio_total_vs_final": 2.0,
+  "sheets_involved": [
+    "Power West Price Off-Peak"
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/task_meta.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/task_meta.json
new file mode 100644
index 0000000000000000000000000000000000000000..9ecf4ee658dc9639621ad0de1938f4eca1dbad8e
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02651/task_meta.json
@@ -0,0 +1,82 @@
+{
+  "fcb_id": "FCB-02651",
+  "task_id": "cross_sheet__dag_bb6e52ccefbe",
+  "tier": "T3_MEDIUM",
+  "category": "cross_sheet",
+  "depth": 2,
+  "total_masked": 14,
+  "is_cross_sheet": true,
+  "prompt_en": "The Power West Price Off-Peak sheet is part of the engineering price compilation, with regional rows such as MID-COLUMBIA, COB, and NP15 and period headers like Q4-01, Cal-01, and Q1-02. Please complete the blank entries in the Q3-02 column on that sheet, specifically cells O16:O22. The related period price entries in the workbook should be in place first, since this Q3-02 column needs to fit with the surrounding visible price columns. Save the completed workbook as an .xlsx file.",
+  "prompt_cn": "“Power West Price Off-Peak” 工作表是这份工程价格资料整理的一部分，里面有 MID-COLUMBIA、COB、NP15 等区域行，以及 Q4-01、Cal-01、Q1-02 等期间标题。请补全该工作表中 Q3-02 列的空白内容，位置是 O16:O22。工作簿中相关期间的价格条目应先补齐，因为这个 Q3-02 列需要与周围可见的价格列保持一致。请将完成后的工作簿保存为 .xlsx 文件。",
+  "qc": {
+    "total": 28,
+    "verdict": "RELEASE",
+    "D1": 5,
+    "D2": 5,
+    "D3": 4,
+    "D4": 5,
+    "D5": 4,
+    "D6": 5,
+    "frontier_hardness": 2,
+    "local_difficulty": 49.2
+  },
+  "source_file_id": "matthew_lenhart__26347__West Prices0608-01",
+  "inferred_domain": "engineering",
+  "domain_confidence": 0.25,
+  "sheet_profiles": [
+    {
+      "name": "Instructions",
+      "used_range": "B4:C18",
+      "row_count": 15,
+      "col_count": 2,
+      "has_header": false,
+      "title_hint": "Instructions",
+      "header_info": null
+    },
+    {
+      "name": "P2",
+      "used_range": "A3:HK310",
+      "row_count": 308,
+      "col_count": 219,
+      "has_header": false,
+      "title_hint": "P2",
+      "header_info": null
+    },
+    {
+      "name": "Power West Price Peak",
+      "used_range": "A1:W41",
+      "row_count": 41,
+      "col_count": 23,
+      "has_header": false,
+      "title_hint": "Power West Price Peak",
+      "header_info": null
+    },
+    {
+      "name": "Power West Price Off-Peak",
+      "used_range": "A1:X42",
+      "row_count": 42,
+      "col_count": 24,
+      "has_header": false,
+      "title_hint": "Power West Price Off Peak",
+      "header_info": null
+    },
+    {
+      "name": "Power West Price Peak-Tim",
+      "used_range": "A1:R1096",
+      "row_count": 1096,
+      "col_count": 18,
+      "has_header": false,
+      "title_hint": "Power West Price Peak Tim",
+      "header_info": null
+    },
+    {
+      "name": "Power West Price Off Peak-Tim",
+      "used_range": "A1:R1096",
+      "row_count": 1096,
+      "col_count": 18,
+      "has_header": false,
+      "title_hint": "Power West Price Off Peak Tim",
+      "header_info": null
+    }
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/audit.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/audit.json
new file mode 100644
index 0000000000000000000000000000000000000000..c3c1814884900abb8065072a973066a26927edff
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/audit.json
@@ -0,0 +1,407 @@
+{
+  "gate": {
+    "pre_nl_gate": {
+      "gate_label": "GATE_PASS",
+      "gate_pass": true,
+      "hard_fails": 0,
+      "warns": 0,
+      "checks": [
+        {
+          "check": "final_target_gate",
+          "pass": true,
+          "detail": "final_target has 21 cells"
+        },
+        {
+          "check": "header_grounding",
+          "pass": true,
+          "severity": "pass",
+          "detail": "1/1 final regions have column_header"
+        },
+        {
+          "check": "mask_consistency",
+          "pass": true,
+          "detail": "mask_last=45664B, src=62275B"
+        },
+        {
+          "check": "dirty_family",
+          "pass": true,
+          "detail": "0 dirty cells"
+        },
+        {
+          "check": "ratio_gate",
+          "pass": true,
+          "detail": "ratio=2.1 (total=44, final=21)"
+        },
+        {
+          "check": "dedup_gate",
+          "pass": true,
+          "detail": "0 duplicate cells across layers"
+        },
+        {
+          "check": "gt_uniqueness",
+          "pass": true,
+          "detail": "21 unique values across 44 cells"
+        },
+        {
+          "check": "tail_artifact",
+          "pass": true,
+          "detail": "0 bad values"
+        },
+        {
+          "check": "unrecoverable_leaf",
+          "pass": true,
+          "detail": "clean",
+          "hidden_const_cells": []
+        },
+        {
+          "check": "adjacent_column_leak",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "header_name_accuracy",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "duplicate_lookup_tie_break",
+          "pass": true,
+          "detail": "no lookup formulas"
+        },
+        {
+          "check": "src_chain_integrity",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean",
+          "sub_checks": {
+            "error_cells": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "external_refs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "volatile_funcs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "missing_sheets": {
+              "pass": true,
+              "count": 0,
+              "sheets": []
+            },
+            "circular_refs": {
+              "pass": true,
+              "cycle_cells": []
+            }
+          }
+        },
+        {
+          "check": "uniqueness_deep",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean"
+        }
+      ]
+    },
+    "post_nl_validate": {
+      "validate_label": "CLEAN",
+      "validate_pass": true,
+      "hard_fails": 0,
+      "soft_warns": 0,
+      "checks": [
+        {
+          "check": "cell_range_match",
+          "pass": true,
+          "detail": "contract=3, prompt=2, missing=0",
+          "missing_ranges": [],
+          "severity": "OK"
+        },
+        {
+          "check": "cell_count_match",
+          "pass": true,
+          "detail": "no explicit total found; skipping (natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "step_count_match",
+          "pass": true,
+          "detail": "contract=1, no explicit steps found (v5 natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "sheet_name_match",
+          "pass": true,
+          "detail": "contract=['AP'], missing=[]",
+          "severity": "OK"
+        },
+        {
+          "check": "no_formula_leak",
+          "pass": true,
+          "detail": "0 formula leaks",
+          "severity": "OK"
+        },
+        {
+          "check": "no_value_leak",
+          "pass": true,
+          "detail": "0 value leaks out of 21 GT cells",
+          "severity": "OK"
+        },
+        {
+          "check": "final_target_first",
+          "pass": true,
+          "detail": "no explicit final target marker (natural format)",
+          "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": true,
+          "detail": "no cross-sheet refs in GT",
+          "severity": "OK"
+        },
+        {
+          "check": "exemplar_consistency",
+          "pass": true,
+          "severity": "OK",
+          "detail": "checked 2 col groups; CONFLICTS: AP!J65: visible='=AVERAGE(J3:J33)' vs GT pattern='=T#+U#'; AP!J66: visible='=AVERAGEIF($Q$3:$Q$33,\"@\",J3:J' vs GT pattern='=T#+U#'"
+        },
+        {
+          "check": "nl_gt_operation_consistency",
+          "pass": true,
+          "detail": "GT funcs: ['IF']",
+          "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 44 GT cells (0%)",
+          "severity": "OK"
+        }
+      ]
+    },
+    "pre_nl_local": {
+      "local_total": 58,
+      "local_label": "PENDING_NL",
+      "hard_fail_flags": [],
+      "warnings": [
+        "nl_missing"
+      ],
+      "local_subscores": {
+        "family_clean": 25,
+        "target_integrity": 15,
+        "taxonomy": 10,
+        "semantic_signal": 8,
+        "nl_schema": 0,
+        "target_alignment": 0,
+        "business_specificity": 0,
+        "nl_risk": 0
+      }
+    }
+  },
+  "verify": {
+    "uniqueness": {
+      "total_gt_cells": 44,
+      "total_non_none": 44,
+      "block_reasons": [],
+      "warnings": [
+        "mixed_gt_types:{'str': 21, 'int': 23}"
+      ],
+      "checks": {
+        "rank_tie_risk": {
+          "rank_cells": 0,
+          "tie_issues": 0,
+          "details": []
+        },
+        "trivial_gt": {
+          "issues": []
+        },
+        "gt_type_consistency": {
+          "types": {
+            "str": 21,
+            "int": 23
+          },
+          "mixed": true
+        },
+        "empty_gt": {
+          "count": 0,
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+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/ground_truth_full.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/ground_truth_full.json
new file mode 100644
index 0000000000000000000000000000000000000000..04607b1c412b3f8bd1e1c92e7fc2a725d4225ab6
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/ground_truth_full.json
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diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/ground_truth_target.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/ground_truth_target.json
new file mode 100644
index 0000000000000000000000000000000000000000..8067f80d84c7b57f94ff265f1bd33f330e0c85cf
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/ground_truth_target.json
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+    "row": 22,
+    "formula": "=IF(I22>J22,\"U\",IF(I22=J22,\"P\",IF(I22<J22,\"O\")))",
+    "cached_value": "O",
+    "pattern_id": "pf_0016"
+  },
+  {
+    "sheet": "AP",
+    "col": "M",
+    "row": 23,
+    "formula": "=IF(I23>J23,\"U\",IF(I23=J23,\"P\",IF(I23<J23,\"O\")))",
+    "cached_value": "O",
+    "pattern_id": "pf_0016"
+  },
+  {
+    "sheet": "AP",
+    "col": "M",
+    "row": 24,
+    "formula": "=IF(I24>J24,\"U\",IF(I24=J24,\"P\",IF(I24<J24,\"O\")))",
+    "cached_value": "O",
+    "pattern_id": "pf_0016"
+  },
+  {
+    "sheet": "AP",
+    "col": "M",
+    "row": 25,
+    "formula": "=IF(I25>J25,\"U\",IF(I25=J25,\"P\",IF(I25<J25,\"O\")))",
+    "cached_value": "O",
+    "pattern_id": "pf_0016"
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/layers.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/layers.json
new file mode 100644
index 0000000000000000000000000000000000000000..212936585df07f8d954ea1de1f7241f32ac7691a
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/layers.json
@@ -0,0 +1,110 @@
+{
+  "dag_id": "dag_0684537806b3",
+  "file_id": "888330d1738833402-dynamic-indirect-lookup-formula-quibility-example-2-10-spill-365-aligw",
+  "category": "single_sheet",
+  "surface_category": "single_sheet",
+  "effective_category": "single_sheet",
+  "depth": 2,
+  "quality": {
+    "chain_error_cells": 0,
+    "chain_external_cells": 0,
+    "is_clean": true
+  },
+  "layers": [
+    {
+      "layer_index": 1,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00633",
+            "rg_00634"
+          ],
+          "sheet": "AP",
+          "col": "M",
+          "rows": [
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            16,
+            17,
+            18,
+            19,
+            20,
+            21,
+            22,
+            23,
+            24,
+            25
+          ],
+          "row_ranges": "4-14,16-25",
+          "row_count": 21,
+          "pattern_id": "pf_0016",
+          "normalized_pattern": "=IF([C-4,R]>[C-3,R],\"U\",IF([C-4,R]=[C-3,R],\"P\",IF([C-4,R]<[C-3,R],\"O\")))",
+          "sample_formula": "=IF(I4>J4,\"U\",IF(I4=J4,\"P\",IF(I4<J4,\"O\")))"
+        }
+      ],
+      "new_eval_cells": 21,
+      "total_masked_cells": 21
+    },
+    {
+      "layer_index": 2,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00617"
+          ],
+          "sheet": "AP",
+          "col": "J",
+          "rows": [
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            16,
+            17,
+            18,
+            19,
+            20,
+            21,
+            22,
+            23,
+            24,
+            25
+          ],
+          "row_ranges": "3-25",
+          "row_count": 23,
+          "pattern_id": "pf_0012",
+          "normalized_pattern": "=[C+10,R]+[C+11,R]",
+          "sample_formula": "=T3+U3"
+        }
+      ],
+      "new_eval_cells": 23,
+      "total_masked_cells": 44
+    }
+  ],
+  "sink": {
+    "region_id": "rg_00633",
+    "sheet": "AP",
+    "col": "M",
+    "pattern_id": "pf_0016",
+    "row_count": 11,
+    "family_size": 21
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/mask_last.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/mask_last.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..eddce0b385391f6d876e24acb0eb476d5a12718e
Binary files /dev/null and b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/mask_last.xlsx differ
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/nl_task.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/nl_task.json
new file mode 100644
index 0000000000000000000000000000000000000000..b8639d61f0287098f91e7725be17b3c86cb2cf51
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/nl_task.json
@@ -0,0 +1,26 @@
+{
+  "task_id": "single_sheet__dag_0684537806b3",
+  "prompt_en": "On the AP sheet, the OFFENSE section is laid out with columns such as Rest, Tm, Opp, Conf, OT?, P PD, PBL, ASUN, ML, O/U PD, O/U, and TOT, and most of the rows already have their game-related entries in place. Please fill in the blank entries in the O/U column on that sheet, specifically M4:M14 and M16:M25. Some of the nearby blank columns are part of the same record structure, so those related entries need to be in place before the O/U column entries are meaningful. When you’re done, save the completed workbook as an .xlsx file.",
+  "prompt_cn": "在 AP 工作表中，OFFENSE 部分按 Rest、Tm、Opp、Conf、OT?、P PD、PBL、ASUN、ML、O/U PD、O/U 和 TOT 等列整理，大多数行的相关记录已经填好了。请补全该工作表中 O/U 列的空白项，位置是 M4:M14 和 M16:M25。旁边有些空白列属于同一组记录内容，因此这些相关项需要先补齐，O/U 列的内容才完整有意义。完成后，请将补好的工作簿保存为 .xlsx 文件。",
+  "quality_notes": "The prompt is minimal, references only visible sheet and column labels, identifies the target O/U ranges clearly, and mentions the natural dependency among nearby blank columns without giving any calculation or formula hints.",
+  "post_check_issues": [],
+  "prompt_mode": "minimal",
+  "hint_leakage": {
+    "score": 7,
+    "level": "low",
+    "max_possible": 100,
+    "dimensions": {
+      "operation_words": 0,
+      "cell_range_density": 7,
+      "step_by_step": 0,
+      "column_operation_mapping": 0,
+      "formula_pattern_hints": 0
+    },
+    "operation_words_found": [],
+    "cell_ranges_found": 2
+  },
+  "version": "v7",
+  "model": "gpt-5.5",
+  "elapsed": 69.9,
+  "attempt": 3
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/release_qc.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/release_qc.json
new file mode 100644
index 0000000000000000000000000000000000000000..3cb0905a3cd1617b9f59f18494aedc20fd324461
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/release_qc.json
@@ -0,0 +1,57 @@
+{
+  "binary": true,
+  "binary_reason": "CORRECT: The mask is clean, cells are real, formulas are consistent, and the AP O/U task is reconstructible from visible headers, scores, totals, and betting-line context.",
+  "D1": {
+    "score": 5,
+    "reason": "All masked cells are within the real AP sheet data range and match the stated contract: M4:M14, M16:M25 plus J3:J25. The diff summary shows 44 truly masked contract cells, 0 contract cells left unmasked, and 0 extra masked cells. Formula-cache-missing artifacts are not actual masking. No evidence of phantom cells or boundary problems. Visible same-pattern leakage does not appear trivially copyable."
+  },
+  "D2": {
+    "score": 5,
+    "reason": "The ground-truth formulas are deterministic and consistent with the source structure. J is the game total from Tm + Opp, and M compares the betting O/U line in column I against the actual total in J to return U, P, or O. Spot checks of cached values match the formulas, e.g. M4: 147.5 > 134 gives U; M6: 141 < 171 gives O."
+  },
+  "D3": {
+    "score": 4,
+    "reason": "The NL prompt clearly identifies the AP sheet and the exact O/U target ranges M4:M14 and M16:M25. It also hints that nearby blank related entries must be completed first, which points to the masked prerequisite column. It could be slightly clearer by naming TOT explicitly as a prerequisite, but it is not ambiguous."
+  },
+  "D4": {
+    "score": 4,
+    "reason": "Using only mask_last.xlsx and the NL prompt, the task is solvable. The needed root evidence is visible: headers identify column J as TOT, columns T and U as Tm and Opp scores, and the visible score data supports inferring total as Tm + Opp. Column H, labeled O/U PD, also visibly equals actual total minus the betting O/U line, reinforcing the dependency. For column M, the O/U header, betting total in I, actual total in J, and standard over/under semantics provide enough evidence to infer U when the line exceeds actual total and O when actual exceeds the line, with P for equality. The main minor gap is that the exact U/O/P conditional formula is not directly visible in an unmasked AP target row, so it requires reasonable domain/structural inference rather than direct copying.",
+    "d4_type": "ok"
+  },
+  "D5": {
+    "score": 5,
+    "reason": "The source spreadsheet data appears sound. Headers are meaningful and consistent for the offense/game-record section, formulas use coherent row-local references, and no circular references, corrupted formulas, or broken source values are indicated. The formula/value relationships in the visible source context are internally consistent."
+  },
+  "D6": {
+    "score": 5,
+    "reason": "The NL description reads like a realistic spreadsheet-completion request. It avoids benchmark jargon, names the relevant worksheet and column/ranges, and gives natural context about related nearby entries."
+  },
+  "total": 28,
+  "verdict": "RELEASE",
+  "verdict_reason": "High-quality task: clean mask boundary, correct ground truth, natural prompt, and a solvable two-layer dependency chain with sufficient visible evidence. Minor ambiguity around explicitly naming the TOT prerequisite is not release-blocking.",
+  "frontier_hardness": {
+    "score": 2,
+    "reason": "This is a short single-sheet depth-2 chain with only two formula patterns. A frontier model should likely infer TOT from Tm + Opp and then infer O/U outcomes from the betting line versus actual total. It requires some spreadsheet and sports-betting reasoning but no cross-sheet multi-hop reasoning, hidden constants, or broad pattern diversity.",
+    "fail_reason": "easy",
+    "is_valid_hardness": false
+  },
+  "_prompt_chars": 32171,
+  "local_difficulty": {
+    "difficulty_score": 48.5,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 44,
+    "is_cross_sheet": false,
+    "unique_patterns": 2,
+    "avg_complexity": 13,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.045
+  },
+  "_timing_context": 89.1,
+  "_timing_api": 26.4,
+  "task_id": "single_sheet__dag_0684537806b3",
+  "elapsed": 115.5,
+  "publish_decision": "YES",
+  "release_tier": "GOLD",
+  "hard_block_reasons": []
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/src.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/src.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..7237f7cfe0639c6ec008de275ff70044dc8f2ad2
Binary files /dev/null and b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/src.xlsx differ
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/target_contract.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/target_contract.json
new file mode 100644
index 0000000000000000000000000000000000000000..e63f84694b88ed817114e4315ba2c0c56ddf104c
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/target_contract.json
@@ -0,0 +1,93 @@
+{
+  "task_id": "single_sheet__dag_0684537806b3",
+  "category": "single_sheet",
+  "depth": 2,
+  "final_target": {
+    "regions": [
+      {
+        "sheet": "AP",
+        "column": "M",
+        "column_header": "O/U",
+        "cell_range": "M4:M14, M16:M25",
+        "cell_count": 21,
+        "rows": [
+          4,
+          5,
+          6,
+          7,
+          8,
+          9,
+          10,
+          11,
+          12,
+          13,
+          14,
+          16,
+          17,
+          18,
+          19,
+          20,
+          21,
+          22,
+          23,
+          24,
+          25
+        ],
+        "first_row_label": "",
+        "last_row_label": ""
+      }
+    ],
+    "cell_count": 21,
+    "formula_families": [
+      "conditional"
+    ]
+  },
+  "prerequisite_steps": [
+    {
+      "layer": 2,
+      "regions": [
+        {
+          "sheet": "AP",
+          "column": "J",
+          "column_header": "TOT",
+          "cell_range": "J3:J25",
+          "cell_count": 23,
+          "rows": [
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            16,
+            17,
+            18,
+            19,
+            20,
+            21,
+            22,
+            23,
+            24,
+            25
+          ],
+          "first_row_label": "",
+          "last_row_label": ""
+        }
+      ],
+      "cell_count": 23
+    }
+  ],
+  "total_prerequisite_cells": 23,
+  "total_masked_cells": 44,
+  "ratio_total_vs_final": 2.1,
+  "sheets_involved": [
+    "AP"
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/task_meta.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/task_meta.json
new file mode 100644
index 0000000000000000000000000000000000000000..69bb2b11dfa07bb903c2b2fa4ace872c701ccb78
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-02731/task_meta.json
@@ -0,0 +1,55 @@
+{
+  "fcb_id": "FCB-02731",
+  "task_id": "single_sheet__dag_0684537806b3",
+  "tier": "T3_MEDIUM",
+  "category": "single_sheet",
+  "depth": 2,
+  "total_masked": 44,
+  "is_cross_sheet": false,
+  "prompt_en": "On the AP sheet, the OFFENSE section is laid out with columns such as Rest, Tm, Opp, Conf, OT?, P PD, PBL, ASUN, ML, O/U PD, O/U, and TOT, and most of the rows already have their game-related entries in place. Please fill in the blank entries in the O/U column on that sheet, specifically M4:M14 and M16:M25. Some of the nearby blank columns are part of the same record structure, so those related entries need to be in place before the O/U column entries are meaningful. When you’re done, save the completed workbook as an .xlsx file.",
+  "prompt_cn": "在 AP 工作表中，OFFENSE 部分按 Rest、Tm、Opp、Conf、OT?、P PD、PBL、ASUN、ML、O/U PD、O/U 和 TOT 等列整理，大多数行的相关记录已经填好了。请补全该工作表中 O/U 列的空白项，位置是 M4:M14 和 M16:M25。旁边有些空白列属于同一组记录内容，因此这些相关项需要先补齐，O/U 列的内容才完整有意义。完成后，请将补好的工作簿保存为 .xlsx 文件。",
+  "qc": {
+    "total": 28,
+    "verdict": "RELEASE",
+    "D1": 5,
+    "D2": 5,
+    "D3": 4,
+    "D4": 4,
+    "D5": 5,
+    "D6": 5,
+    "frontier_hardness": 2,
+    "local_difficulty": 48.5
+  },
+  "source_file_id": "888330d1738833402-dynamic-indirect-lookup-formula-quibility-example-2-10-spill-365-aligw",
+  "inferred_domain": "education",
+  "domain_confidence": 0.25,
+  "sheet_profiles": [
+    {
+      "name": "(MatchUp)",
+      "used_range": "A1:AS4",
+      "row_count": 4,
+      "col_count": 45,
+      "has_header": false,
+      "title_hint": "(MatchUp)",
+      "header_info": null
+    },
+    {
+      "name": "Alb",
+      "used_range": "A1:BB74",
+      "row_count": 74,
+      "col_count": 54,
+      "has_header": false,
+      "title_hint": "Alb",
+      "header_info": null
+    },
+    {
+      "name": "AP",
+      "used_range": "A1:BB74",
+      "row_count": 74,
+      "col_count": 54,
+      "has_header": false,
+      "title_hint": "AP",
+      "header_info": null
+    }
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/audit.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/audit.json
new file mode 100644
index 0000000000000000000000000000000000000000..e20b2bb20805b5b51405016f0f84bcc077dc9558
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/audit.json
@@ -0,0 +1,436 @@
+{
+  "gate": {
+    "pre_nl_gate": {
+      "gate_label": "GATE_PASS",
+      "gate_pass": true,
+      "hard_fails": 0,
+      "warns": 0,
+      "checks": [
+        {
+          "check": "final_target_gate",
+          "pass": true,
+          "detail": "final_target has 7 cells"
+        },
+        {
+          "check": "header_grounding",
+          "pass": true,
+          "severity": "pass",
+          "detail": "1/1 final regions have column_header"
+        },
+        {
+          "check": "mask_consistency",
+          "pass": true,
+          "detail": "mask_last=26426B, src=37522B"
+        },
+        {
+          "check": "dirty_family",
+          "pass": true,
+          "detail": "0 dirty cells"
+        },
+        {
+          "check": "ratio_gate",
+          "pass": true,
+          "detail": "ratio=2.1 (total=15, final=7)"
+        },
+        {
+          "check": "dedup_gate",
+          "pass": true,
+          "detail": "0 duplicate cells across layers"
+        },
+        {
+          "check": "gt_uniqueness",
+          "pass": true,
+          "detail": "14 unique values across 15 cells"
+        },
+        {
+          "check": "tail_artifact",
+          "pass": true,
+          "detail": "0 bad values"
+        },
+        {
+          "check": "unrecoverable_leaf",
+          "pass": true,
+          "detail": "clean",
+          "hidden_const_cells": []
+        },
+        {
+          "check": "adjacent_column_leak",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "header_name_accuracy",
+          "pass": true,
+          "detail": "clean"
+        },
+        {
+          "check": "duplicate_lookup_tie_break",
+          "pass": true,
+          "detail": "no lookup formulas"
+        },
+        {
+          "check": "src_chain_integrity",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean",
+          "sub_checks": {
+            "error_cells": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "external_refs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "volatile_funcs": {
+              "pass": true,
+              "count": 0,
+              "cells": []
+            },
+            "missing_sheets": {
+              "pass": true,
+              "count": 0,
+              "sheets": []
+            },
+            "circular_refs": {
+              "pass": true,
+              "cycle_cells": []
+            }
+          }
+        },
+        {
+          "check": "uniqueness_deep",
+          "pass": true,
+          "severity": "ok",
+          "detail": "clean"
+        }
+      ]
+    },
+    "post_nl_validate": {
+      "validate_label": "SOFT_WARN",
+      "validate_pass": true,
+      "hard_fails": 0,
+      "soft_warns": 1,
+      "checks": [
+        {
+          "check": "cell_range_match",
+          "pass": false,
+          "detail": "contract=15, prompt=7, missing=7",
+          "missing_ranges": [
+            "N14",
+            "N19",
+            "N23",
+            "N27",
+            "N31",
+            "N35",
+            "N39"
+          ],
+          "severity": "SOFT_WARN"
+        },
+        {
+          "check": "cell_count_match",
+          "pass": true,
+          "detail": "no explicit total found; skipping (natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "step_count_match",
+          "pass": true,
+          "detail": "contract=1, no explicit steps found (v5 natural format)",
+          "severity": "OK"
+        },
+        {
+          "check": "sheet_name_match",
+          "pass": true,
+          "detail": "contract=['0500'], missing=[]",
+          "severity": "OK"
+        },
+        {
+          "check": "no_formula_leak",
+          "pass": true,
+          "detail": "0 formula leaks",
+          "severity": "OK"
+        },
+        {
+          "check": "no_value_leak",
+          "pass": true,
+          "detail": "0 value leaks out of 7 GT cells",
+          "severity": "OK"
+        },
+        {
+          "check": "final_target_first",
+          "pass": true,
+          "detail": "no explicit final target marker (natural format)",
+          "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": true,
+          "detail": "no cross-sheet refs in GT",
+          "severity": "OK"
+        },
+        {
+          "check": "exemplar_consistency",
+          "pass": true,
+          "severity": "OK",
+          "detail": "checked 2 col groups"
+        },
+        {
+          "check": "nl_gt_operation_consistency",
+          "pass": true,
+          "detail": "GT funcs: ['SUM']",
+          "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 15 GT cells (0%)",
+          "severity": "OK"
+        }
+      ]
+    },
+    "pre_nl_local": {
+      "local_total": 58,
+      "local_label": "PENDING_NL",
+      "hard_fail_flags": [],
+      "warnings": [
+        "release_verdict_not_keep",
+        "nl_missing"
+      ],
+      "local_subscores": {
+        "family_clean": 25,
+        "target_integrity": 15,
+        "taxonomy": 10,
+        "semantic_signal": 8,
+        "nl_schema": 0,
+        "target_alignment": 0,
+        "business_specificity": 0,
+        "nl_risk": 0
+      }
+    }
+  },
+  "verify": {
+    "uniqueness": {
+      "total_gt_cells": 15,
+      "total_non_none": 15,
+      "block_reasons": [],
+      "warnings": [
+        "mixed_gt_types:{'float': 13, 'int': 2}"
+      ],
+      "checks": {
+        "rank_tie_risk": {
+          "rank_cells": 0,
+          "tie_issues": 0,
+          "details": []
+        },
+        "trivial_gt": {
+          "issues": []
+        },
+        "gt_type_consistency": {
+          "types": {
+            "float": 13,
+            "int": 2
+          },
+          "mixed": true
+        },
+        "empty_gt": {
+          "count": 0,
+          "details": []
+        }
+      }
+    },
+    "src_chain": {
+      "hard_block": false,
+      "block_reasons": [],
+      "checks": {
+        "error_cells": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "external_refs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "volatile_funcs": {
+          "pass": true,
+          "count": 0,
+          "cells": []
+        },
+        "missing_sheets": {
+          "pass": true,
+          "count": 0,
+          "sheets": []
+        },
+        "circular_refs": {
+          "pass": true,
+          "cycle_cells": []
+        }
+      },
+      "required_chain_scope": {
+        "external_ref_in_required_chain": 0,
+        "external_ref_in_other": 0,
+        "error_cells_in_required_chain": 0,
+        "error_cells_in_other": 0,
+        "required_chain_cells": 15
+      }
+    },
+    "solver_visibility": {
+      "contract_cells": 15,
+      "total_masked": 15,
+      "total_visible": 485,
+      "depth": 2,
+      "block_reasons": [],
+      "warnings": [
+        "broken_chains:3/15"
+      ],
+      "checks": {
+        "broken_chains": {
+          "count": 3,
+          "checked": 15,
+          "details": [
+            {
+              "cell": "0500!D39",
+              "missing_dep": "0500!D23",
+              "formula": "=SUM(D35,D31,D27,D23,D19,D14)"
+            },
+            {
+              "cell": "0500!N23",
+              "missing_dep": "0500!J23",
+              "formula": "=SUM(L23,J23,H23,F23,D23)"
+            },
+            {
+              "cell": "0500!D24",
+              "missing_dep": "0500!D23",
+              "formula": "=D23/N23"
+            }
+          ]
+        },
+        "orphan_masks": {
+          "count": 0,
+          "details": []
+        },
+        "self_contained": {
+          "missing_sheets": []
+        }
+      }
+    },
+    "exemplar": {
+      "soft_block": false,
+      "block_reasons": [],
+      "checks": {
+        "pattern_coverage": {
+          "pass": true,
+          "total_gt_patterns": 3,
+          "total_src_patterns": 19,
+          "zero_exemplar_count": 0,
+          "low_exemplar_count": 0
+        },
+        "zero_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "low_exemplar_patterns": {
+          "pass": true,
+          "patterns": []
+        },
+        "func_coverage": {
+          "SUM": {
+            "total_masked": 8,
+            "visible_exemplars": 76
+          },
+          "arithmetic": {
+            "total_masked": 7,
+            "visible_exemplars": 242
+          }
+        }
+      }
+    },
+    "shortcut": {
+      "shortcut_risk": 0.0,
+      "flags": []
+    },
+    "release_audit": {
+      "surface_single_sheet": true,
+      "surface_sheets": [
+        "0500"
+      ],
+      "cross_sheet_actual": false,
+      "cross_sheet_ref_count": 0,
+      "referenced_sheets": [],
+      "target_shape": "template_column_fill",
+      "layer_sizes": [
+        7,
+        8
+      ],
+      "mask_last_total_cells": 15,
+      "layer_growth_ratios": [
+        1.1429
+      ],
+      "pattern_dominance_ratio": 0.4667,
+      "visible_clone_regions": 76,
+      "nearby_visible_clone_regions": 4,
+      "nearby_visible_clone_rows": 4,
+      "nearby_visible_clone_ratio": 0.5,
+      "promptability_score": 0.8,
+      "release_reasons": [
+        "visible_clone_leakage"
+      ],
+      "release_verdict": "REVISION_POOL"
+    }
+  },
+  "difficulty": {
+    "task_id": "single_sheet__dag_48a5f6fa2da1",
+    "difficulty_score": 43.1,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 15,
+    "is_cross_sheet": false,
+    "unique_patterns": 4,
+    "avg_complexity": 7.2,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.462,
+    "score_breakdown": {
+      "depth": 7,
+      "cross_sheet": 0,
+      "cell_count": 7.8,
+      "patterns": 12,
+      "complexity": 10.9,
+      "cross_refs": 0,
+      "vis_penalty": 5.4
+    }
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/ground_truth_full.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/ground_truth_full.json
new file mode 100644
index 0000000000000000000000000000000000000000..c2de9e1afd7ef5c41498a5ce055c2d7b80943221
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/ground_truth_full.json
@@ -0,0 +1,137 @@
+[
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 15,
+    "formula": "=D14/N14",
+    "cached_value": 0.629270231385905,
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 20,
+    "formula": "=D19/N19",
+    "cached_value": 0,
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 24,
+    "formula": "=D23/N23",
+    "cached_value": 0,
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 28,
+    "formula": "=D27/N27",
+    "cached_value": 1.7997042114911401,
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 32,
+    "formula": "=D31/N31",
+    "cached_value": 0.32835077071353325,
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 36,
+    "formula": "=D35/N35",
+    "cached_value": 0.3755456579256658,
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 40,
+    "formula": "=D39/N39",
+    "cached_value": 0.4369032851608291,
+    "pattern_id": "pf_0000",
+    "layer": 1
+  },
+  {
+    "sheet": "0500",
+    "col": "N",
+    "row": 14,
+    "formula": "=SUM(L14,J14,H14,F14,D14)",
+    "cached_value": 12262032.55,
+    "pattern_id": "pf_0003",
+    "layer": 2
+  },
+  {
+    "sheet": "0500",
+    "col": "N",
+    "row": 19,
+    "formula": "=SUM(L19,J19,H19,F19,D19)",
+    "cached_value": 3960050.2399999998,
+    "pattern_id": "pf_0003",
+    "layer": 2
+  },
+  {
+    "sheet": "0500",
+    "col": "N",
+    "row": 23,
+    "formula": "=SUM(L23,J23,H23,F23,D23)",
+    "cached_value": 68695.76,
+    "pattern_id": "pf_0003",
+    "layer": 2
+  },
+  {
+    "sheet": "0500",
+    "col": "N",
+    "row": 27,
+    "formula": "=SUM(L27,J27,H27,F27,D27)",
+    "cached_value": 241909.33,
+    "pattern_id": "pf_0003",
+    "layer": 2
+  },
+  {
+    "sheet": "0500",
+    "col": "N",
+    "row": 31,
+    "formula": "=SUM(L31,J31,H31,F31,D31)",
+    "cached_value": 4528092.28,
+    "pattern_id": "pf_0003",
+    "layer": 2
+  },
+  {
+    "sheet": "0500",
+    "col": "N",
+    "row": 35,
+    "formula": "=SUM(L35,J35,H35,F35,D35)",
+    "cached_value": 7118525.76,
+    "pattern_id": "pf_0003",
+    "layer": 2
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 39,
+    "formula": "=SUM(D35,D31,D27,D23,D19,D14)",
+    "cached_value": 12311631.33,
+    "pattern_id": "pf_0006",
+    "layer": 2
+  },
+  {
+    "sheet": "0500",
+    "col": "N",
+    "row": 39,
+    "formula": "=SUM(N35,N31,N27,N23,N19,N14)",
+    "cached_value": 28179305.92,
+    "pattern_id": "pf_0006",
+    "layer": 2
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/ground_truth_target.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/ground_truth_target.json
new file mode 100644
index 0000000000000000000000000000000000000000..9e3d8ea64bd7b26ec0b365dc3e4f0bd8102a46e3
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/ground_truth_target.json
@@ -0,0 +1,58 @@
+[
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 15,
+    "formula": "=D14/N14",
+    "cached_value": 0.629270231385905,
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 20,
+    "formula": "=D19/N19",
+    "cached_value": 0,
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 24,
+    "formula": "=D23/N23",
+    "cached_value": 0,
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 28,
+    "formula": "=D27/N27",
+    "cached_value": 1.7997042114911401,
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 32,
+    "formula": "=D31/N31",
+    "cached_value": 0.32835077071353325,
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 36,
+    "formula": "=D35/N35",
+    "cached_value": 0.3755456579256658,
+    "pattern_id": "pf_0000"
+  },
+  {
+    "sheet": "0500",
+    "col": "D",
+    "row": 40,
+    "formula": "=D39/N39",
+    "cached_value": 0.4369032851608291,
+    "pattern_id": "pf_0000"
+  }
+]
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/layers.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/layers.json
new file mode 100644
index 0000000000000000000000000000000000000000..a078a989a91c6e2dcd9fc376985e2cd4c48de546
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/layers.json
@@ -0,0 +1,119 @@
+{
+  "dag_id": "dag_48a5f6fa2da1",
+  "file_id": "rick_buy__32698__DOUG",
+  "category": "single_sheet",
+  "surface_category": "single_sheet",
+  "effective_category": "single_sheet",
+  "depth": 2,
+  "quality": {
+    "chain_error_cells": 0,
+    "chain_external_cells": 0,
+    "is_clean": true
+  },
+  "layers": [
+    {
+      "layer_index": 1,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00021",
+            "rg_00022",
+            "rg_00023",
+            "rg_00024",
+            "rg_00025",
+            "rg_00026",
+            "rg_00027"
+          ],
+          "sheet": "0500",
+          "col": "D",
+          "rows": [
+            15,
+            20,
+            24,
+            28,
+            32,
+            36,
+            40
+          ],
+          "row_ranges": "15,20,24,28,32,36,40",
+          "row_count": 7,
+          "pattern_id": "pf_0000",
+          "normalized_pattern": "=[C,R-1]/[C+10,R-1]",
+          "sample_formula": "=D14/N14"
+        }
+      ],
+      "new_eval_cells": 7,
+      "total_masked_cells": 7
+    },
+    {
+      "layer_index": 2,
+      "new_pattern_groups": [
+        {
+          "region_ids": [
+            "rg_00291"
+          ],
+          "sheet": "0500",
+          "col": "D",
+          "rows": [
+            39
+          ],
+          "row_ranges": "39",
+          "row_count": 1,
+          "pattern_id": "pf_0006",
+          "normalized_pattern": "=SUM([C,R-4],[C,R-8],[C,R-12],[C,R-16],[C,R-20],[C,R-25])",
+          "sample_formula": "=SUM(D35,D31,D27,D23,D19,D14)"
+        },
+        {
+          "region_ids": [
+            "rg_00165",
+            "rg_00166",
+            "rg_00167",
+            "rg_00168",
+            "rg_00169",
+            "rg_00170"
+          ],
+          "sheet": "0500",
+          "col": "N",
+          "rows": [
+            14,
+            19,
+            23,
+            27,
+            31,
+            35
+          ],
+          "row_ranges": "14,19,23,27,31,35",
+          "row_count": 6,
+          "pattern_id": "pf_0003",
+          "normalized_pattern": "=SUM([C-2,R],[C-4,R],[C-6,R],[C-8,R],[C-10,R])",
+          "sample_formula": "=SUM(L14,J14,H14,F14,D14)"
+        },
+        {
+          "region_ids": [
+            "rg_00296"
+          ],
+          "sheet": "0500",
+          "col": "N",
+          "rows": [
+            39
+          ],
+          "row_ranges": "39",
+          "row_count": 1,
+          "pattern_id": "pf_0006",
+          "normalized_pattern": "=SUM([C,R-4],[C,R-8],[C,R-12],[C,R-16],[C,R-20],[C,R-25])",
+          "sample_formula": "=SUM(N35,N31,N27,N23,N19,N14)"
+        }
+      ],
+      "new_eval_cells": 8,
+      "total_masked_cells": 15
+    }
+  ],
+  "sink": {
+    "region_id": "rg_00021",
+    "sheet": "0500",
+    "col": "D",
+    "pattern_id": "pf_0000",
+    "row_count": 1,
+    "family_size": 7
+  }
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/mask_last.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/mask_last.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..5d2fbfdd95196b28616d5caa3fb7ac31ada8d1ea
Binary files /dev/null and b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/mask_last.xlsx differ
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/nl_task.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/nl_task.json
new file mode 100644
index 0000000000000000000000000000000000000000..5e4393ee7a23350342c8551442c3395383556422
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/nl_task.json
@@ -0,0 +1,26 @@
+{
+  "task_id": "single_sheet__dag_48a5f6fa2da1",
+  "prompt_en": "The sheet \"0500\" is an accounts receivable aging worksheet for power plants, headed \"POWER PLANTS ACCOUNTS RECEIVABLE AGING\" and \"AS OF FEBRUARY 28, 2001,\" with aging columns such as CURRENT, 1-30, 31-60, 61-90, and OVER 90. In the CURRENT column, please fill in the blank entries for the visible plant/date sections, specifically the cells D15, D20, D24, D28, D32, D36, and D40. The surrounding aging figures and the related monthly sections need to be in place before those CURRENT entries are meaningful. Please save the completed workbook as an .xlsx file.",
+  "prompt_cn": "“0500”工作表是一张电厂应收账款账龄表，表头包含“POWER PLANTS ACCOUNTS RECEIVABLE AGING”和“AS OF FEBRUARY 28, 2001”，并列出了 CURRENT、1-30、31-60、61-90、OVER 90 等账龄栏位。请在 CURRENT 列中补全各个可见电厂/日期区块里的空白项，具体位置是 D15、D20、D24、D28、D32、D36 和 D40。周围的账龄数据以及相关月份区块需要先保持完整，这些 CURRENT 项才有意义。请将完成后的工作簿保存为 .xlsx 文件。",
+  "quality_notes": "The prompt identifies the sheet, business context, visible headers, and exact target cells while avoiding formulas, calculation language, and operational hints. It also mentions the natural dependency context without spelling out a method.",
+  "post_check_issues": [],
+  "prompt_mode": "minimal",
+  "hint_leakage": {
+    "score": 5,
+    "level": "low",
+    "max_possible": 100,
+    "dimensions": {
+      "operation_words": 0,
+      "cell_range_density": 5,
+      "step_by_step": 0,
+      "column_operation_mapping": 0,
+      "formula_pattern_hints": 0
+    },
+    "operation_words_found": [],
+    "cell_ranges_found": 0
+  },
+  "version": "v7",
+  "model": "gpt-5.5",
+  "elapsed": 92.8,
+  "attempt": 3
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/release_qc.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/release_qc.json
new file mode 100644
index 0000000000000000000000000000000000000000..ef43742cfda12a681edc9c896d7738af446e0aca
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/release_qc.json
@@ -0,0 +1,58 @@
+{
+  "binary": true,
+  "binary_reason": "Well-designed: all masked cells are real and cleanly bounded, GT formulas are consistent, and the masked chain is reconstructible from visible totals/percent patterns and headers.",
+  "D1": {
+    "score": 5,
+    "reason": "All 15 contract cells are truly masked, within the actual sheet range, and there are no extra masked cells. The mask diff is clean. Visible same-sheet formulas/values provide structural clues, but the task is not purely zero-reasoning copy-paste because the solver must also reconstruct the TOTAL column and the totals-row dependency."
+  },
+  "D2": {
+    "score": 5,
+    "reason": "The layer-1 formulas match the source workbook: each CURRENT percent cell divides the CURRENT A/R amount by the corresponding TOTAL in column N, with D40 depending on D39 and N39. Cached values are consistent with those formulas, including blank numeric inputs behaving as zero. Formulas are deterministic and unambiguous."
+  },
+  "D3": {
+    "score": 4,
+    "reason": "The NL clearly identifies the sheet and the final cells D15, D20, D24, D28, D32, D36, and D40 to fill. It also hints that related monthly sections must be in place, but it does not explicitly name the prerequisite blanks in N14:N39 and D39, so the dependency-fill requirement is somewhat implicit."
+  },
+  "D4": {
+    "score": 5,
+    "reason": "From mask_last.xlsx and the prompt alone, the task is solvable. The sheet shows aging headers, A/R rows, PER CENT rows, a TOTAL column, and a TOTALS row. Visible percentage values in F/H/J/L establish the percent-row pattern as aging amount divided by row total, while visible totals-row formulas in F39/H39/J39/L39 establish the aggregation pattern. The TOTAL column blanks can be inferred as sums of the visible aging buckets, and N39 as the sum of the row totals. No hidden constants or external references are needed.",
+    "d4_type": "ok"
+  },
+  "D5": {
+    "score": 5,
+    "reason": "The source sheet appears structurally sound: headers are meaningful, formulas are coherent for an accounts receivable aging worksheet, there are no apparent circular references or broken formulas, and blanks used in sums/percentages are consistent with spreadsheet behavior."
+  },
+  "D6": {
+    "score": 4,
+    "reason": "The NL sounds mostly like a realistic workplace request and avoids benchmark jargon. The phrase about surrounding aging figures and related monthly sections is slightly vague, but still natural."
+  },
+  "total": 28,
+  "verdict": "RELEASE",
+  "verdict_reason": "High-quality chain-masked task with clean masking, correct GT, and sufficient visible evidence for reconstruction. Minor NL implicitness around prerequisite cells does not prevent release.",
+  "frontier_hardness": {
+    "score": 2,
+    "reason": "This is a short depth-2 single-sheet chain with clear row/column structure and strong visible exemplars for both percentage and totals patterns. A frontier model should likely reconstruct the formulas successfully.",
+    "fail_reason": "easy",
+    "is_valid_hardness": false
+  },
+  "_prompt_chars": 25034,
+  "_timing_load_workbooks": 0.12,
+  "_timing_context": 0.01,
+  "_timing_api": 69.63,
+  "local_difficulty": {
+    "difficulty_score": 44.2,
+    "difficulty": "medium",
+    "depth": 2,
+    "total_masked": 15,
+    "is_cross_sheet": false,
+    "unique_patterns": 4,
+    "avg_complexity": 8,
+    "cross_refs": 0,
+    "visible_exemplar_ratio": 0.462
+  },
+  "task_id": "single_sheet__dag_48a5f6fa2da1",
+  "elapsed": 69.8,
+  "publish_decision": "YES",
+  "release_tier": "GOLD",
+  "hard_block_reasons": []
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/src.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/src.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..97cc335ab5187d48f3f9e7b67f80c9f61be7df46
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diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/target_contract.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/target_contract.json
new file mode 100644
index 0000000000000000000000000000000000000000..375966b05f84aab71a12e33dc2c1bdb0fa7c9c2d
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/target_contract.json
@@ -0,0 +1,75 @@
+{
+  "task_id": "single_sheet__dag_48a5f6fa2da1",
+  "category": "single_sheet",
+  "depth": 2,
+  "final_target": {
+    "regions": [
+      {
+        "sheet": "0500",
+        "column": "D",
+        "column_header": "CURRENT",
+        "cell_range": "D15, D20, D24, D28, D32, D36, D40",
+        "cell_count": 7,
+        "rows": [
+          15,
+          20,
+          24,
+          28,
+          32,
+          36,
+          40
+        ],
+        "first_row_label": "PER CENT",
+        "last_row_label": "PER CENT"
+      }
+    ],
+    "cell_count": 7,
+    "formula_families": [
+      "arithmetic"
+    ]
+  },
+  "prerequisite_steps": [
+    {
+      "layer": 2,
+      "regions": [
+        {
+          "sheet": "0500",
+          "column": "D",
+          "column_header": "CURRENT",
+          "cell_range": "D39",
+          "cell_count": 1,
+          "rows": [
+            39
+          ],
+          "first_row_label": "TOTALS",
+          "last_row_label": ""
+        },
+        {
+          "sheet": "0500",
+          "column": "N",
+          "column_header": "TOTAL",
+          "cell_range": "N14, N19, N23, N27, N31, N35, N39",
+          "cell_count": 7,
+          "rows": [
+            14,
+            19,
+            23,
+            27,
+            31,
+            35,
+            39
+          ],
+          "first_row_label": "SMITH ENRON",
+          "last_row_label": "TOTALS"
+        }
+      ],
+      "cell_count": 8
+    }
+  ],
+  "total_prerequisite_cells": 8,
+  "total_masked_cells": 15,
+  "ratio_total_vs_final": 2.1,
+  "sheets_involved": [
+    "0500"
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/task_meta.json b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/task_meta.json
new file mode 100644
index 0000000000000000000000000000000000000000..c50e14dbf83a996ff695ef22da1513c3af0479c4
--- /dev/null
+++ b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03086/task_meta.json
@@ -0,0 +1,91 @@
+{
+  "fcb_id": "FCB-03086",
+  "task_id": "single_sheet__dag_48a5f6fa2da1",
+  "tier": "T3_MEDIUM",
+  "category": "single_sheet",
+  "depth": 2,
+  "total_masked": 15,
+  "is_cross_sheet": false,
+  "prompt_en": "The sheet \"0500\" is an accounts receivable aging worksheet for power plants, headed \"POWER PLANTS ACCOUNTS RECEIVABLE AGING\" and \"AS OF FEBRUARY 28, 2001,\" with aging columns such as CURRENT, 1-30, 31-60, 61-90, and OVER 90. In the CURRENT column, please fill in the blank entries for the visible plant/date sections, specifically the cells D15, D20, D24, D28, D32, D36, and D40. The surrounding aging figures and the related monthly sections need to be in place before those CURRENT entries are meaningful. Please save the completed workbook as an .xlsx file.",
+  "prompt_cn": "“0500”工作表是一张电厂应收账款账龄表，表头包含“POWER PLANTS ACCOUNTS RECEIVABLE AGING”和“AS OF FEBRUARY 28, 2001”，并列出了 CURRENT、1-30、31-60、61-90、OVER 90 等账龄栏位。请在 CURRENT 列中补全各个可见电厂/日期区块里的空白项，具体位置是 D15、D20、D24、D28、D32、D36 和 D40。周围的账龄数据以及相关月份区块需要先保持完整，这些 CURRENT 项才有意义。请将完成后的工作簿保存为 .xlsx 文件。",
+  "qc": {
+    "total": 28,
+    "verdict": "RELEASE",
+    "D1": 5,
+    "D2": 5,
+    "D3": 4,
+    "D4": 5,
+    "D5": 5,
+    "D6": 4,
+    "frontier_hardness": 2,
+    "local_difficulty": 44.2
+  },
+  "source_file_id": "rick_buy__32698__DOUG",
+  "inferred_domain": "engineering",
+  "domain_confidence": 0.5,
+  "sheet_profiles": [
+    {
+      "name": "0201",
+      "used_range": "A1:O42",
+      "row_count": 42,
+      "col_count": 15,
+      "has_header": false,
+      "title_hint": "0201",
+      "header_info": null
+    },
+    {
+      "name": "0700",
+      "used_range": "A1:O42",
+      "row_count": 42,
+      "col_count": 15,
+      "has_header": false,
+      "title_hint": "0700",
+      "header_info": null
+    },
+    {
+      "name": "0600",
+      "used_range": "A1:O42",
+      "row_count": 42,
+      "col_count": 15,
+      "has_header": false,
+      "title_hint": "0600",
+      "header_info": null
+    },
+    {
+      "name": "0500",
+      "used_range": "A1:O42",
+      "row_count": 42,
+      "col_count": 15,
+      "has_header": false,
+      "title_hint": "0500",
+      "header_info": null
+    },
+    {
+      "name": "0200",
+      "used_range": "A1:O42",
+      "row_count": 42,
+      "col_count": 15,
+      "has_header": false,
+      "title_hint": "0200",
+      "header_info": null
+    },
+    {
+      "name": "1299",
+      "used_range": "A1:O42",
+      "row_count": 42,
+      "col_count": 15,
+      "has_header": false,
+      "title_hint": "1299",
+      "header_info": null
+    },
+    {
+      "name": "1199",
+      "used_range": "A1:O42",
+      "row_count": 42,
+      "col_count": 15,
+      "has_header": false,
+      "title_hint": "1199",
+      "header_info": null
+    }
+  ]
+}
\ No newline at end of file
diff --git a/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03225/src.xlsx b/FormulaCascade_Benchmark_eval_200/T3_MEDIUM/internal/FCB-03225/src.xlsx
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index 0000000000000000000000000000000000000000..458b1dbdbe548a576a86fb72fd2cdeea4221b427
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