Improve Go XLSX fidelity and publish benchmarks

.gitignore

@@ -60,6 +60,14 @@ MiniPdf.Web/MiniPdf.Web.Client/wwwroot/fonts/
 /tests/Issue_Files/minipdf_xlsx
 /tests/Issue_Files/minipdf_pptx
 /artifacts/*
+!/artifacts/go-benchmark/
+/artifacts/go-benchmark/*
+!/artifacts/go-benchmark/issue/
+/artifacts/go-benchmark/issue/*
+!/artifacts/go-benchmark/issue/xlsx/
+/artifacts/go-benchmark/issue/xlsx/*
+!/artifacts/go-benchmark/issue/xlsx/report/
+!/artifacts/go-benchmark/issue/xlsx/report/**
 !/artifacts/rust-benchmark/
 /artifacts/rust-benchmark/*
 !/artifacts/rust-benchmark/benchmark_matrix.json

FEATURE_PARITY.md

@@ -241,7 +241,7 @@ All six implementations have language-specific visual benchmark runners under
 | Malformed/security fixtures | P | P | I | P | I | B/P |
 | Classic XLSX report | I | I | M | M | M | M |
 | Classic DOCX report | I | I | M | M | M | M |
-| Issue XLSX report | I | I | I | M | M | M |
+| Issue XLSX report | I | I | I | I | M | M |
 | Issue DOCX report | I | M | M | M | M | M |
 | Issue PPTX report | I | M | M | M | M | M |
 | Classic PPTX corpus/report | M | M | M | M | M | M |
@@ -273,6 +273,33 @@ present. Require a focused unit test plus a reproducible visual benchmark case.
   overrides raised the five-case classic DOCX average from `0.9872` to `0.9889`;
   all cases improved or held. See the local
   [`report`](artifacts/go-parity-docx-margins/report/comparison_report.md).
+- 2026-09-14: horizontally paginating overflowing single-column XLSX text
+  raised `classic09_long_text` from `0.1840` with `1/12` pages to `0.8942`
+  with `12/12` pages. The complete 191-case classic XLSX average increased
+  from `0.8436` to `0.8473`, with all unrelated case scores unchanged. See the
+  local [`report`](artifacts/go-benchmark/classic/xlsx/report/comparison_report.md).
+- 2026-09-14: preserving explicit XLSX row and cell references raised
+  `classic11_sparse_rows` from `0.6990` to `0.9996` and
+  `classic12_sparse_columns` from `0.6993` to `0.9995`, with both candidates
+  reaching `2/2` reference pages. The complete 191-case average increased from
+  `0.8473` to `0.8503`, with no case regression.
+- 2026-09-14: skipping worksheets with no physical rows while retaining a
+  fallback page for an entirely empty workbook raised
+  `classic30_mixed_empty_and_filled_sheets` from `0.6834` with `4/2` pages to
+  `0.9993` with `2/2` pages. The complete average reached `0.8519`; SHA-256
+  comparison against the preceding stage showed this was the only changed
+  candidate among all 191 cases.
+- 2026-09-14: mapping OOXML boolean cells from `1` and `0` to Excel-compatible
+  `TRUE` and `FALSE` raised `classic42_boolean_values` from `0.9264` to
+  `0.9869`. The complete average reached `0.8522`; SHA-256 comparison against
+  the preceding stage showed this was the only changed candidate among all 191
+  cases.
+- 2026-09-14: the complete Go issue XLSX benchmark covers all 24 tracked issue
+  fixtures with 24 successful conversions and no missing Microsoft 365 or
+  LibreOffice references. The report averages `0.4929` and compares up to three
+  pages per case because two stress fixtures produce 3,781 and 2,860 candidate
+  pages. See the tracked
+  [`report`](artifacts/go-benchmark/issue/xlsx/report/comparison_report.md).
 
 ## Alignment Backlog
 

artifacts/go-benchmark/issue/xlsx/report/benchmark_coverage.json

@@ -8,16 +8,112 @@
   "auxiliary_reference_label": "LibreOffice (auxiliary)",
   "fixture_scope": "shared-on-disk-fixtures",
   "executes_dotnet_xunit": false,
-  "max_compare_pages": 0,
-  "selected_cases": 1,
-  "passed_conversions": 1,
+  "max_compare_pages": 3,
+  "selected_cases": 24,
+  "passed_conversions": 24,
   "failed_conversions": 0,
   "missing_references": 0,
   "missing_auxiliary_references": 0,
   "comparison_completed": true,
-  "comparison_results": 1,
-  "average_score": 0.4046,
+  "comparison_results": 24,
+  "average_score": 0.49293750000000003,
   "cases": [
+    {
+      "name": "Academic Achievement Summary Table",
+      "case_id": "Academic Achievement Summary Table",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Academic Achievement Summary Table.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "AcademicAchievement_temp",
+      "case_id": "AcademicAchievement_temp",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/AcademicAchievement_temp.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "Business expense budget1",
+      "case_id": "Business expense budget1",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Business expense budget1.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "Business expenses budget2",
+      "case_id": "Business expenses budget2",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Business expenses budget2.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "Business plan checklist with SWOT analysis1",
+      "case_id": "Business plan checklist with SWOT analysis1",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Business plan checklist with SWOT analysis1.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "Event budget1",
+      "case_id": "Event budget1",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Event budget1.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "Expense report basic1",
+      "case_id": "Expense report basic1",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Expense report basic1.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "Grocery list1",
+      "case_id": "Grocery list1",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Grocery list1.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
     {
       "name": "Issue202609031340",
       "case_id": "Issue202609031340",
@@ -29,6 +125,186 @@
       "candidate_exists": true,
       "reference_exists": true,
       "auxiliary_reference_exists": true
+    },
+    {
+      "name": "payroll-calculator_f",
+      "case_id": "payroll-calculator_f",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/payroll-calculator_f.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "PO_anonymized",
+      "case_id": "PO_anonymized",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/PO_anonymized.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "Simple invoice1",
+      "case_id": "Simple invoice1",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Simple invoice1.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "Small business cash flow forecast1",
+      "case_id": "Small business cash flow forecast1",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Small business cash flow forecast1.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "Wedding_timeline_planner1_copy",
+      "case_id": "Wedding_timeline_planner1_copy",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Wedding_timeline_planner1_copy.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "Weekly schedule planner1",
+      "case_id": "Weekly schedule planner1",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/Weekly schedule planner1.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "XlsxIssue152_ClusteredNonZeroBarChart",
+      "case_id": "XlsxIssue152_ClusteredNonZeroBarChart",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/XlsxIssue152_ClusteredNonZeroBarChart.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "XlsxIssue75",
+      "case_id": "XlsxIssue75",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/XlsxIssue75.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "XlsxIssue77_MergedCellAlignment",
+      "case_id": "XlsxIssue77_MergedCellAlignment",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/XlsxIssue77_MergedCellAlignment.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "XlsxIssue77_Template1",
+      "case_id": "XlsxIssue77_Template1",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/XlsxIssue77_Template1.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "XlsxIssue77_Template2_Workaround",
+      "case_id": "XlsxIssue77_Template2_Workaround",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/XlsxIssue77_Template2_Workaround.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "XlsxIssue81_LayoutOptions",
+      "case_id": "XlsxIssue81_LayoutOptions",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/XlsxIssue81_LayoutOptions.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "XlsxIssue82_5mb",
+      "case_id": "XlsxIssue82_5mb",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/XlsxIssue82_5mb.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "XlsxIssue82_SampleTestData5mb",
+      "case_id": "XlsxIssue82_SampleTestData5mb",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/XlsxIssue82_SampleTestData5mb.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
+    },
+    {
+      "name": "XlsxIssue82_WideTable",
+      "case_id": "XlsxIssue82_WideTable",
+      "suite": "issue",
+      "format": "xlsx",
+      "source_path": "tests/Issue_Files/xlsx/XlsxIssue82_WideTable.xlsx",
+      "conversion_status": "passed",
+      "conversion_exit_code": null,
+      "candidate_exists": true,
+      "reference_exists": true,
+      "auxiliary_reference_exists": true
     }
   ]
 }