{"abstract":"A compatibility fraction remains opaque.","category":"Unicode","checks":4,"contract":"Produce NFKD, including compatibility fractions and decomposed accents.","contract_signature":"x","evaluation_group":"model-410fc948c7db8e8d","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-nfkd-fractions","id":"FA-2846","implementations":{"attempt":{"sha256":"dc05457d32dc37226b0528a6fed7a01f58c4689af3caf2cdaebaf27556c9fdbf","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport re, unicodedata, json, csv, io, html, base64, binascii, codecs, struct\nfrom urllib.parse import quote, unquote, unquote_to_bytes, urlencode, parse_qsl, urlsplit, urlunsplit\nfrom email.header import decode_header, make_header\nfrom email.utils import getaddresses\nfrom xml.etree import ElementTree as ET\nimport shlex, string, textwrap\n\nN = 1\nobservations = []\ndef solve(x):\n    try:\n        return unicodedata.normalize('NFKC', x)\n    except Exception as exc:\n        return {\"error\": type(exc).__name__}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('boundary 1', solve('½'), '1⁄2')\ncheck('boundary 2', solve('é'), 'é')\ncheck('boundary 3', solve('ff'), 'ff')\ncheck('boundary 4', solve(''), '')\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"},"broken":{"sha256":"fc90146425601140c1132e2c2abc37a6c0f02dc49b291034472b453b1f22d955","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport re, unicodedata, json, csv, io, html, base64, binascii, codecs, struct\nfrom urllib.parse import quote, unquote, unquote_to_bytes, urlencode, parse_qsl, urlsplit, urlunsplit\nfrom email.header import decode_header, make_header\nfrom email.utils import getaddresses\nfrom xml.etree import ElementTree as ET\nimport shlex, string, textwrap\n\nN = 1\nobservations = []\ndef solve(x):\n    try:\n        return unicodedata.normalize('NFD', x)\n    except Exception as exc:\n        return {\"error\": type(exc).__name__}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('boundary 1', solve('½'), '1⁄2')\ncheck('boundary 2', solve('é'), 'é')\ncheck('boundary 3', solve('ff'), 'ff')\ncheck('boundary 4', solve(''), '')\nprint(json.dumps({\"observations\": observations, \"passed\": all(x[\"passed\"] for x in observations)}, ensure_ascii=False))\nraise SystemExit(0 if all(x[\"passed\"] for x in observations) else 1)\n"}},"limitations":" This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.","method":"Deterministic executable model with adversarial boundary fixtures.","provenance":{"created_by":"Failure Map","dependencies":"Python standard library","family":"xp-nfkd-fractions","generated_at":"2026-09-29T14:37:18.020685+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"A local executable model for consumers of structured text; oracle values are authored literals, not outputs copied from the repaired implementation.","root_cause":"The implementation applies an operation whose text or grammar semantics violate this contract: Produce NFKD, including compatibility fractions and decomposed accents.","sha256":"1a807f73761c9a732a02602994f60025ec68a68bbba9634819c4fac31339b888","title":"A compatibility fraction remains opaque · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verified":true,"visibility":"public","verification":{"attempt":{"elapsed_ms":131.676,"exit_code":1,"observations":[{"actual":"1⁄2","check":"boundary 1","expected":"1⁄2","passed":true},{"actual":"é","check":"boundary 2","expected":"é","passed":false},{"actual":"ff","check":"boundary 3","expected":"ff","passed":true},{"actual":"","check":"boundary 4","expected":"","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"1⁄2\", \"expected\": \"1⁄2\", \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": \"é\", \"expected\": \"é\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \"ff\", \"expected\": \"ff\", \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": \"\", \"expected\": \"\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":59.53,"exit_code":1,"observations":[{"actual":"½","check":"boundary 1","expected":"1⁄2","passed":false},{"actual":"é","check":"boundary 2","expected":"é","passed":true},{"actual":"ff","check":"boundary 3","expected":"ff","passed":false},{"actual":"","check":"boundary 4","expected":"","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"½\", \"expected\": \"1⁄2\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \"é\", \"expected\": \"é\", \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": \"ff\", \"expected\": \"ff\", \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": \"\", \"expected\": \"\", \"passed\": true}], \"passed\": false}\n"}},"member_only":{"stages":["fixed"],"fields":["implementations.fixed","verification.fixed","harness","repair"],"note":"The verified repair, its recorded checks, the repair description, and the scoring harness are available to members."}}