Release WCAB 0.1.1

Mirror the v0.1.1 release: generated paired workbooks, truth manifests, integrity-addressed JSONL catalogue, schema, and validation record.

LICENSE

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+MIT License
+
+Copyright (c) 2026 SybilGambleyyu
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+---
+pretty_name: Workbook Change Assurance Benchmark
+license: mit
+language:
+- en
+tags:
+- excel
+- spreadsheet
+- benchmark
+- audit
+- testing
+- ci
+size_categories:
+- n<1K
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: manifest.jsonl
+---
+
+# Workbook Change Assurance Benchmark (WCAB)
+
+WCAB is an open, deterministic benchmark for tools that review changes to
+Excel workbooks. Each of its 16 synthetic cases supplies a baseline workbook,
+a candidate workbook, explicit observable change facts, a reference review
+disposition, and documented coverage boundaries.
+
+The dataset's machine-readable entry point is `manifest.jsonl`: one JSON
+record per case. Every record includes the full truth contract plus exact
+relative workbook paths, byte counts, and SHA-256 digests. The corresponding
+binary fixtures live under `fixtures/`.
+
+## What this evaluates
+
+WCAB targets spreadsheet-change assurance: whether a diff tool, policy gate,
+static analyzer, or editing agent preserves material review evidence when a
+workbook changes. The current cases include formula-to-value replacements,
+reference drift, input propagation, external references, named ranges,
+controls, calculation state, cycles, structural changes, and a small
+multi-workbook portfolio.
+
+The benchmark does **not** evaluate Excel formula execution or claim that
+candidate numerical results are correct. `review_expectation` is a transparent
+benchmark convention, not a universal business policy. Consumers should retain
+each case's `coverage` boundary and report unsupported features explicitly.
+
+## Use
+
+Download `manifest.jsonl` to enumerate the cases, then retrieve the referenced
+fixture files. Verify each downloaded workbook with its SHA-256 digest before
+running an evaluator. The source repository includes a local validator and a
+deterministic fixture generator:
+
+```bash
+git clone https://github.com/SybilGambleyyu/workbook-change-benchmark
+cd workbook-change-benchmark
+python -m venv .venv
+.venv/bin/python -m pip install -e '.[dev]'
+wcab validate --fixtures fixtures
+```
+
+See the [source repository](https://github.com/SybilGambleyyu/workbook-change-benchmark)
+for the schema, validation contract, and releases. The dataset is MIT licensed.

RESEARCH.md

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+# Research basis
+
+WCAB was selected after examining change-assurance needs across spreadsheet
+audit, versioning, repair, and research corpora on 2026-08-01.
+
+## What is already available
+
+| Resource | What it makes measurable | Why it is not sufficient for change assurance |
+| --- | --- | --- |
+| [Modified EUSES](https://spreadsheets.sai.tugraz.at/index.php/corpora-for-benchmarking/euses/) | Injected formula faults and output-cell test decisions | It is fault-localization/testing data, not an explicit before/after review policy or dependency-impact contract. |
+| [VEnron](https://researchportal.hkust.edu.hk/en/publications/venron-a-versioned-spreadsheet-corpus-and-related-evolution-analy/) | Recovered spreadsheet version history | The original work says version information is fragmented and uses recovered evolution groups; it does not publish a CI-oriented accept/review/block oracle for changes. |
+| [Enron Error Corpus discussion](https://web-ainf.aau.at/pub/jannach/files/Conference_VL_HCC_2016.pdf) | A small collection of real faults and repairs | It is important evidence that real historical changes can be faults, but it targets fault recovery rather than broad change-review controls. |
+| [SpreadsheetBench](https://github.com/RUCKBReasoning/SpreadsheetBench) | Real-world spreadsheet manipulation tasks | It evaluates producing or editing workbooks, not deciding whether a candidate change should pass a review gate. |
+| [Formula repair benchmark](https://www.microsoft.com/en-us/research/publication/benchmark-dataset-generation-and-evaluation-for-excel-formula-repair-with-llms/) | Formula runtime-error repair | It evaluates repair generation and execution checks, not version comparison or conservative static impact. |
+
+## Evidence of the workflow problem
+
+Microsoft's [Spreadsheet Inquire documentation](https://support.microsoft.com/en-US/Excel/compare-workbooks-using-spreadsheet-inquire)
+describes cell-by-cell comparison, workbook analysis, and relationship diagrams,
+but the workflow is a desktop inspection rather than a portable policy gate.
+Commercial tools such as [xltrail](https://www.xltrail.com/) provide version
+history and component diffs.  Their existence is useful confirmation that
+formula-level history matters, while it also leaves room for an open,
+reproducible way to evaluate policy and impact claims.
+
+The spreadsheet-evolution literature describes a central review problem: a
+structural edit can rewrite many formulas even when intent is preserved, while a
+single formula or value change can alter model behaviour.  The paper surfaced
+through [this TU Delft copy](https://pure.tudelft.nl/ws/portalfiles/portal/47903754/00_Spreadsheet_Evolution.pdf)
+explicitly calls out both effects.  A benchmark must therefore include both
+clear regressions and benign-looking structural changes.
+
+## Design decision
+
+The first release uses original generated workbooks instead of rehosting public
+corporate corpora.  This provides unambiguous redistribution rights, directly
+observable ground truth, deterministic regeneration, and cases that include
+modern OOXML controls often absent from older `.xls` research datasets.
+
+WCAB's result is intentionally narrower than a claim of Excel semantic
+equivalence.  It provides checkable change facts and static dependency lower
+bounds.  A tool that cannot handle a case must report a coverage gap; it cannot
+turn a missing observation into an "allow" result.

docs/schema.md

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+# WCAB truth schema, version 1
+
+Every case has one `truth.json`. It is public metadata for an original,
+generated fixture; it never relies on a private workbook or an external data
+source.
+
+```json
+{
+  "schema_version": 1,
+  "id": "family.case_name",
+  "title": "Human-readable scenario",
+  "family": "finance",
+  "topology": "pair",
+  "review_expectation": "block",
+  "facts": [],
+  "must_reach": [],
+  "coverage": []
+}
+```
+
+`topology` is either `pair` (`baseline.xlsx` and `candidate.xlsx`) or
+`portfolio` (`baseline/` and `candidate/` directories). `review_expectation`
+is one of `allow`, `review`, or `block`. It is a transparent benchmark
+convention, not an assertion that every organization must use the same policy.
+
+## Facts
+
+Facts are observed directly from the fixture files by `wcab validate`.
+
+| Fact kind | Required fields | Observable contract |
+| --- | --- | --- |
+| `formula_to_value` | `sheet`, `cell` | A formula cell becomes a literal value. |
+| `formula_changed` | `sheet`, `cell` | Formula text exists on both sides and differs. |
+| `value_changed` | `sheet`, `cell` | Literal values exist on both sides and differ. |
+| `external_formula_added` | `sheet`, `cell` | Candidate formula contains an external-workbook reference. The target is never opened. |
+| `defined_name_changed` | `name` | A defined name's stored destination differs. |
+| `data_validation_count_changed` | `sheet`, `baseline_count`, `candidate_count` | Worksheet data-validation count differs as declared. |
+| `conditional_formatting_count_changed` | `sheet`, `baseline_count`, `candidate_count` | Conditional-formatting range count differs as declared. |
+| `sheet_visibility_changed` | `sheet`, `baseline_state`, `candidate_state` | The stored sheet state changes. |
+| `formula_cell_unlocked` | `sheet`, `cell` | A formula cell is explicitly unlocked while its sheet remains protected. |
+| `manual_calculation_incomplete` | none | Candidate calculation metadata is `manual` and records incomplete calculation. |
+| `static_cycle_introduced` | `cells` | Every declared direct A1 cell reaches itself in the local static dependency graph. |
+| `three_d_scope_changed` | `formula_sheet`, `formula_cell`, `inserted_sheet`, `after_sheet`, `before_sheet` | Formula text remains unchanged while a sheet is inserted inside the declared tab span. |
+| `structural_formula_rewrite` | `baseline`, `candidate` | Declared before/after formula locations and text exist. This is an annotation, not a general proof of equivalence. |
+| `portfolio_value_changed` | `workbook`, `sheet`, `cell` | A literal value differs between paired portfolio members. |
+| `portfolio_external_reference` | `workbook`, `sheet`, `cell`, `target_workbook` | The local portfolio model contains the declared external workbook reference. |
+
+## Static impact lower bounds
+
+`must_reach` entries have one `source` plus one or more `targets`, each with a
+sheet and cell. The bundled validator uses only direct, ordinary local A1
+references and walks the resulting graph. The targets are therefore lower
+bounds: no result implies a complete Excel dependency calculation, a formula
+evaluation, dynamic-reference resolution, or a claim about cached values.
+
+## Coverage text
+
+Each case contains an explicit `coverage` list. Consumers must preserve these
+boundaries in reports and must not turn unsupported constructs into silent
+passes.
+
+## JSONL case catalogue
+
+`fixtures/manifest.jsonl` contains one deterministic JSON object per case. It
+copies the truth fields (`id`, `title`, `family`, `topology`,
+`review_expectation`, `facts`, `must_reach`, and `coverage`) and adds:
+
+| Field | Meaning |
+| --- | --- |
+| `case_path` | Case directory relative to the fixture root. |
+| `baseline_files` | One or more baseline file records. |
+| `candidate_files` | One or more candidate file records. |
+
+Each file record has a root-relative `path`, exact `bytes`, and SHA-256
+`sha256`. Pair cases have one file on each side; portfolio cases can have more.
+The catalogue is generated by `wcab build` or `wcab manifest`; consumers may
+use it to verify the exact bytes they evaluated. It does not add any formula
+execution or semantic-equivalence claim beyond the underlying truth contract.

docs/validation.md

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+# Validation record
+
+This record describes the WCAB 0.1 validation run performed on 2026-08-01 and
+its 0.1.1 distribution supplement on 2026-08-02. It is reproducible from this
+repository; no network service or private workbook is required.
+
+## Fixture integrity
+
+Environment:
+
+- Python 3.12.3 and 3.13.9
+- openpyxl 3.1.5
+- pytest 9.1.1
+- ruff 0.16.1
+
+Commands:
+
+```bash
+python -m pip install -e '.[dev]'
+wcab build --output fixtures
+wcab manifest --fixtures fixtures
+ruff check .
+ruff format --check .
+pytest
+wcab validate --fixtures fixtures
+```
+
+Results:
+
+- 16 cases: 15 paired-workbook cases and one directory portfolio case.
+- 18 observable truth facts: 11 `block` and five `review` dispositions.
+- 50 workbook and truth-manifest fixture files, plus one generated JSONL case
+  catalogue, all generated from source.
+- Nine unit tests passed under both Python versions, including independent
+  regeneration and byte-for-byte fixture-tree equality.
+- The fixture validator accepted all 16 cases.
+
+## Distribution supplement
+
+The 0.1.1 release also builds a one-row-per-case `manifest.jsonl` catalogue.
+Each row retains the truth contract and includes byte counts and SHA-256
+digests for the workbooks it names.
+
+Commands:
+
+```bash
+python -m build
+twine check dist/workbook_change_benchmark-0.1.1*
+python -m venv /tmp/wcab-wheel-test
+/tmp/wcab-wheel-test/bin/python -m pip install \
+  dist/workbook_change_benchmark-0.1.1-py3-none-any.whl
+/tmp/wcab-wheel-test/bin/wcab validate --fixtures fixtures
+/tmp/wcab-wheel-test/bin/wcab manifest --fixtures fixtures --output /tmp/manifest.jsonl
+cmp fixtures/manifest.jsonl /tmp/manifest.jsonl
+```
+
+Results:
+
+- The source distribution and universal wheel passed `twine check`.
+- A fresh Python 3.12 wheel installation validated all 16 fixtures and emitted
+  byte-identical JSONL output.
+- The full nine-test suite, lint, and format checks passed under the supported
+  local Python versions (3.12 and 3.13).
+
+## FormulaFence reference adapter
+
+FormulaFence 0.219.0 was installed from the local checked-out release source
+and invoked only against WCAB's generated files:
+
+```bash
+wcab formulafence --fixtures fixtures --strict
+```
+
+Results:
+
+- All 17 currently mappable diff/portfolio facts were observed.
+- No mapped fact was missed across all 16 cases.
+- Five targeted lint expectations were observed: copied-formula interruption
+  (`FF082`), conditional-aggregate range shape (`FF093`), explicitly unlocked
+  formula cell (`FF085`), incomplete manual calculation (`FF086`), and static
+  cycle (`FF090`).
+- One fact remains intentionally unmapped: the benign structural formula
+  rewrite. It records known before/after locations but does not claim that a
+  generic tool can prove Excel semantic equivalence from this small fixture.
+
+This is a baseline implementation result, not a claim that FormulaFence or any
+other tool has complete Excel coverage.

fixtures/finance/defined_name_redirect/truth.json

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+{
+  "coverage": [
+    "The assertion compares the defined-name destination; name resolution beyond this fixture is out of scope."
+  ],
+  "facts": [
+    {
+      "kind": "defined_name_changed",
+      "name": "DiscountRate"
+    }
+  ],
+  "family": "finance",
+  "id": "finance.defined_name_redirect",
+  "must_reach": [],
+  "review_expectation": "block",
+  "schema_version": 1,
+  "title": "A named rate redirects to a different assumption",
+  "topology": "pair"
+}

fixtures/finance/external_formula_reference/truth.json

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+{
+  "coverage": [
+    "The external workbook is intentionally absent and must not be opened by a benchmark tool."
+  ],
+  "facts": [
+    {
+      "cell": "C8",
+      "kind": "formula_changed",
+      "sheet": "Summary"
+    },
+    {
+      "cell": "C8",
+      "kind": "external_formula_added",
+      "sheet": "Summary"
+    }
+  ],
+  "family": "finance",
+  "id": "finance.external_formula_reference",
+  "must_reach": [],
+  "review_expectation": "block",
+  "schema_version": 1,
+  "title": "An internal driver is replaced by an external workbook reference",
+  "topology": "pair"
+}

fixtures/finance/formula_to_value/truth.json

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+{
+  "coverage": [
+    "Static dependency lower bound; numerical recalculation is out of scope."
+  ],
+  "facts": [
+    {
+      "cell": "C8",
+      "kind": "formula_to_value",
+      "sheet": "Revenue"
+    }
+  ],
+  "family": "finance",
+  "id": "finance.formula_to_value",
+  "must_reach": [
+    {
+      "source": {
+        "cell": "C8",
+        "sheet": "Revenue"
+      },
+      "targets": [
+        {
+          "cell": "C10",
+          "sheet": "Revenue"
+        },
+        {
+          "cell": "C5",
+          "sheet": "Summary"
+        },
+        {
+          "cell": "C6",
+          "sheet": "Summary"
+        },
+        {
+          "cell": "B4",
+          "sheet": "Dashboard"
+        }
+      ]
+    }
+  ],
+  "review_expectation": "block",
+  "schema_version": 1,
+  "title": "Revenue formula is replaced with a hard-coded value",
+  "topology": "pair"
+}

fixtures/finance/input_value_change/truth.json

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+{
+  "coverage": [
+    "An input change is not inherently an error; it remains material review evidence."
+  ],
+  "facts": [
+    {
+      "cell": "C2",
+      "kind": "value_changed",
+      "sheet": "Assumptions"
+    }
+  ],
+  "family": "finance",
+  "id": "finance.input_value_change",
+  "must_reach": [
+    {
+      "source": {
+        "cell": "C2",
+        "sheet": "Assumptions"
+      },
+      "targets": [
+        {
+          "cell": "C5",
+          "sheet": "Revenue"
+        },
+        {
+          "cell": "C8",
+          "sheet": "Revenue"
+        },
+        {
+          "cell": "C10",
+          "sheet": "Revenue"
+        },
+        {
+          "cell": "C6",
+          "sheet": "Summary"
+        },
+        {
+          "cell": "B4",
+          "sheet": "Dashboard"
+        }
+      ]
+    }
+  ],
+  "review_expectation": "review",
+  "schema_version": 1,
+  "title": "Approved input changes and propagates into outputs",
+  "topology": "pair"
+}

fixtures/finance/wrong_period_reference/truth.json

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+{
+  "coverage": [
+    "The benchmark asserts the reference drift, not the business correctness of every formula."
+  ],
+  "facts": [
+    {
+      "cell": "C8",
+      "kind": "formula_changed",
+      "sheet": "Revenue"
+    }
+  ],
+  "family": "finance",
+  "id": "finance.wrong_period_reference",
+  "must_reach": [
+    {
+      "source": {
+        "cell": "C8",
+        "sheet": "Revenue"
+      },
+      "targets": [
+        {
+          "cell": "C10",
+          "sheet": "Revenue"
+        },
+        {
+          "cell": "C5",
+          "sheet": "Summary"
+        },
+        {
+          "cell": "B4",
+          "sheet": "Dashboard"
+        }
+      ]
+    }
+  ],
+  "review_expectation": "block",
+  "schema_version": 1,
+  "title": "Revenue formula uses a prior-period units reference",
+  "topology": "pair"
+}

fixtures/governance/formula_cell_unlocked/truth.json

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+{
+  "coverage": [
+    "This is a direct cell-protection assertion; style inheritance and allowed edit ranges are out of scope."
+  ],
+  "facts": [
+    {
+      "cell": "D10",
+      "kind": "formula_cell_unlocked",
+      "sheet": "Controls"
+    }
+  ],
+  "family": "governance",
+  "id": "governance.formula_cell_unlocked",
+  "must_reach": [],
+  "review_expectation": "block",
+  "schema_version": 1,
+  "title": "A protected calculated cell is explicitly unlocked",
+  "topology": "pair"
+}

fixtures/governance/hidden_sheet_revealed/truth.json

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+{
+  "coverage": [
+    "Visibility is an observable workbook control; cell content is not part of this assertion."
+  ],
+  "facts": [
+    {
+      "baseline_state": "hidden",
+      "candidate_state": "visible",
+      "kind": "sheet_visibility_changed",
+      "sheet": "ReviewControls"
+    }
+  ],
+  "family": "governance",
+  "id": "governance.hidden_sheet_revealed",
+  "must_reach": [],
+  "review_expectation": "review",
+  "schema_version": 1,
+  "title": "A hidden review-control sheet is made visible",
+  "topology": "pair"
+}

fixtures/governance/manual_calculation_incomplete/truth.json

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+{
+  "coverage": [
+    "Calculation metadata is evidence of save state, not proof that any cached result is wrong."
+  ],
+  "facts": [
+    {
+      "kind": "manual_calculation_incomplete"
+    }
+  ],
+  "family": "governance",
+  "id": "governance.manual_calculation_incomplete",
+  "must_reach": [],
+  "review_expectation": "block",
+  "schema_version": 1,
+  "title": "A formula workbook records incomplete manual calculation",
+  "topology": "pair"
+}

fixtures/governance/static_cycle_introduced/truth.json

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+{
+  "coverage": [
+    "The cycle is direct and static; iterative calculation settings and dynamic references are out of scope."
+  ],
+  "facts": [
+    {
+      "cells": [
+        {
+          "cell": "D10",
+          "sheet": "Controls"
+        },
+        {
+          "cell": "D11",
+          "sheet": "Controls"
+        }
+      ],
+      "kind": "static_cycle_introduced"
+    }
+  ],
+  "family": "governance",
+  "id": "governance.static_cycle_introduced",
+  "must_reach": [],
+  "review_expectation": "block",
+  "schema_version": 1,
+  "title": "Two direct formulas form a static cycle",
+  "topology": "pair"
+}

fixtures/manifest.jsonl

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+{"baseline_files":[{"bytes":7042,"path":"finance/defined_name_redirect/baseline.xlsx","sha256":"75e99e52e4a2e8351b0750e4817fcacfeb9920db98b363d2388dbd4d330b472d"}],"candidate_files":[{"bytes":7042,"path":"finance/defined_name_redirect/candidate.xlsx","sha256":"2bb3cc9080f5c1eeda8ecf34abeae4ea56fd53fa5ad5949ded6162727875d226"}],"case_path":"finance/defined_name_redirect","coverage":["The assertion compares the defined-name destination; name resolution beyond this fixture is out of scope."],"facts":[{"kind":"defined_name_changed","name":"DiscountRate"}],"family":"finance","id":"finance.defined_name_redirect","must_reach":[],"review_expectation":"block","schema_version":1,"title":"A named rate redirects to a different assumption","topology":"pair"}
+{"baseline_files":[{"bytes":7042,"path":"finance/external_formula_reference/baseline.xlsx","sha256":"75e99e52e4a2e8351b0750e4817fcacfeb9920db98b363d2388dbd4d330b472d"}],"candidate_files":[{"bytes":7065,"path":"finance/external_formula_reference/candidate.xlsx","sha256":"410fd472583c68f3d1dbbe9b0a7034bfb5e6f7792fd269b29ae0081072d33230"}],"case_path":"finance/external_formula_reference","coverage":["The external workbook is intentionally absent and must not be opened by a benchmark tool."],"facts":[{"cell":"C8","kind":"formula_changed","sheet":"Summary"},{"cell":"C8","kind":"external_formula_added","sheet":"Summary"}],"family":"finance","id":"finance.external_formula_reference","must_reach":[],"review_expectation":"block","schema_version":1,"title":"An internal driver is replaced by an external workbook reference","topology":"pair"}
+{"baseline_files":[{"bytes":7042,"path":"finance/formula_to_value/baseline.xlsx","sha256":"75e99e52e4a2e8351b0750e4817fcacfeb9920db98b363d2388dbd4d330b472d"}],"candidate_files":[{"bytes":7047,"path":"finance/formula_to_value/candidate.xlsx","sha256":"0e61888bdce02d825f69cff256ae2a5d4951ee8d6c4f55b0b15cdceb1ee3097d"}],"case_path":"finance/formula_to_value","coverage":["Static dependency lower bound; numerical recalculation is out of scope."],"facts":[{"cell":"C8","kind":"formula_to_value","sheet":"Revenue"}],"family":"finance","id":"finance.formula_to_value","must_reach":[{"source":{"cell":"C8","sheet":"Revenue"},"targets":[{"cell":"C10","sheet":"Revenue"},{"cell":"C5","sheet":"Summary"},{"cell":"C6","sheet":"Summary"},{"cell":"B4","sheet":"Dashboard"}]}],"review_expectation":"block","schema_version":1,"title":"Revenue formula is replaced with a hard-coded value","topology":"pair"}
+{"baseline_files":[{"bytes":7042,"path":"finance/input_value_change/baseline.xlsx","sha256":"75e99e52e4a2e8351b0750e4817fcacfeb9920db98b363d2388dbd4d330b472d"}],"candidate_files":[{"bytes":7041,"path":"finance/input_value_change/candidate.xlsx","sha256":"99d8c9c80f1313cef1f0773d6cd901d4a1c4aa91f315809e70af69ee0a9ff9ed"}],"case_path":"finance/input_value_change","coverage":["An input change is not inherently an error; it remains material review evidence."],"facts":[{"cell":"C2","kind":"value_changed","sheet":"Assumptions"}],"family":"finance","id":"finance.input_value_change","must_reach":[{"source":{"cell":"C2","sheet":"Assumptions"},"targets":[{"cell":"C5","sheet":"Revenue"},{"cell":"C8","sheet":"Revenue"},{"cell":"C10","sheet":"Revenue"},{"cell":"C6","sheet":"Summary"},{"cell":"B4","sheet":"Dashboard"}]}],"review_expectation":"review","schema_version":1,"title":"Approved input changes and propagates into outputs","topology":"pair"}
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fixtures/operations/conditional_formatting_removed/truth.json

@@ -0,0 +1,20 @@
+{
+  "coverage": [
+    "The benchmark observes the control removal but does not judge the intended visual design."
+  ],
+  "facts": [
+    {
+      "baseline_count": 1,
+      "candidate_count": 0,
+      "kind": "conditional_formatting_count_changed",
+      "sheet": "Operations"
+    }
+  ],
+  "family": "operations",
+  "id": "operations.conditional_formatting_removed",
+  "must_reach": [],
+  "review_expectation": "review",
+  "schema_version": 1,
+  "title": "A material exception highlight is removed",
+  "topology": "pair"
+}

fixtures/operations/copied_formula_interruption/truth.json

@@ -0,0 +1,19 @@
+{
+  "coverage": [
+    "Immediate formula peers provide the copied-block context; no formula execution is required."
+  ],
+  "facts": [
+    {
+      "cell": "F7",
+      "kind": "formula_to_value",
+      "sheet": "Operations"
+    }
+  ],
+  "family": "operations",
+  "id": "operations.copied_formula_interruption",
+  "must_reach": [],
+  "review_expectation": "block",
+  "schema_version": 1,
+  "title": "One copied margin formula is replaced by a manual number",
+  "topology": "pair"
+}

fixtures/operations/data_validation_removed/truth.json

@@ -0,0 +1,20 @@
+{
+  "coverage": [
+    "The contract observes validation presence, not whether a future user enters an invalid value."
+  ],
+  "facts": [
+    {
+      "baseline_count": 1,
+      "candidate_count": 0,
+      "kind": "data_validation_count_changed",
+      "sheet": "Operations"
+    }
+  ],
+  "family": "operations",
+  "id": "operations.data_validation_removed",
+  "must_reach": [],
+  "review_expectation": "block",
+  "schema_version": 1,
+  "title": "Input validation is removed from an operational tracker",
+  "topology": "pair"
+}

fixtures/operations/sumifs_range_shape/truth.json

@@ -0,0 +1,19 @@
+{
+  "coverage": [
+    "The range-shape defect is deliberately static and does not require evaluating SUMIFS."
+  ],
+  "facts": [
+    {
+      "cell": "H6",
+      "kind": "formula_changed",
+      "sheet": "Operations"
+    }
+  ],
+  "family": "operations",
+  "id": "operations.sumifs_range_shape",
+  "must_reach": [],
+  "review_expectation": "block",
+  "schema_version": 1,
+  "title": "A conditional aggregate has mismatched static ranges",
+  "topology": "pair"
+}

fixtures/portfolio/external_driver_value_change/truth.json

@@ -0,0 +1,27 @@
+{
+  "coverage": [
+    "The target workbook is present only as a local sibling; no network or filesystem path resolution is permitted."
+  ],
+  "facts": [
+    {
+      "cell": "B2",
+      "kind": "portfolio_value_changed",
+      "sheet": "Inputs",
+      "workbook": "drivers.xlsx"
+    },
+    {
+      "cell": "B2",
+      "kind": "portfolio_external_reference",
+      "sheet": "Summary",
+      "target_workbook": "drivers.xlsx",
+      "workbook": "model.xlsx"
+    }
+  ],
+  "family": "portfolio",
+  "id": "portfolio.external_driver_value_change",
+  "must_reach": [],
+  "review_expectation": "review",
+  "schema_version": 1,
+  "title": "An upstream workbook driver changes while a downstream workbook consumes it",
+  "topology": "portfolio"
+}