{"abstract":"ROT13 rotates non-ASCII letters.","category":"Encodings","checks":4,"contract":"Apply ROT13 only to ASCII Latin letters, retaining case and punctuation.","evaluation_group":"model-bee45a720367660b","failed_approach":"The attempted repair handles the primary example but still violates a separate boundary of the same contract.","family":"xp-rot13-ascii-scope","id":"FA-3351","implementations":{"attempt":{"sha256":"9521a39916bb32db592cb433f7f4f6e9898c26a525f68f7176200a5a93ecfd93","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 ''.join(chr((ord(c.lower())-97+13)%26+97) if c.isalpha() else c for c in 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('AbZ'), 'NoM')\ncheck('boundary 2', solve('é'), 'é')\ncheck('boundary 3', solve('Hello!'), 'Uryyb!')\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":"a6f1aff8075d4539c86345de85e015ee880e66e2b2caf6971b7e289feb99dfdd","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 ''.join(chr((ord(c)-97+13)%26+97) if c.isalpha() else c for c in 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('AbZ'), 'NoM')\ncheck('boundary 2', solve('é'), 'é')\ncheck('boundary 3', solve('Hello!'), 'Uryyb!')\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"},"fixed":{"sha256":"6685b079da2f8642a30179df4cf73c5f3bc7db97f627a384f7f04c17fd2c80f0","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 codecs.encode(x,'rot_13')\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('AbZ'), 'NoM')\ncheck('boundary 2', solve('é'), 'é')\ncheck('boundary 3', solve('Hello!'), 'Uryyb!')\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-rot13-ascii-scope","generated_at":"2026-09-29T14:37:24.552829+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.","repair":"Implement the complete stated contract, including the boundary fixtures: Apply ROT13 only to ASCII Latin letters, retaining case and punctuation.","root_cause":"The implementation applies an operation whose text or grammar semantics violate this contract: Apply ROT13 only to ASCII Latin letters, retaining case and punctuation.","sha256":"114a4b2df4bd592d3da811e0fa4ee45e4b4266666f20c794820158b1de9c3890","title":"ROT13 rotates non-ASCII letters · case 01","variant":1,"variant_policy":"Five numbered records share a model and may reuse boundary fixtures.","verification":{"attempt":{"elapsed_ms":53.556,"exit_code":1,"observations":[{"actual":"nom","check":"boundary 1","expected":"NoM","passed":false},{"actual":"t","check":"boundary 2","expected":"é","passed":false},{"actual":"uryyb!","check":"boundary 3","expected":"Uryyb!","passed":false},{"actual":"","check":"boundary 4","expected":"","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"nom\", \"expected\": \"NoM\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \"t\", \"expected\": \"é\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \"uryyb!\", \"expected\": \"Uryyb!\", \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": \"\", \"expected\": \"\", \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":55.637,"exit_code":1,"observations":[{"actual":"hog","check":"boundary 1","expected":"NoM","passed":false},{"actual":"t","check":"boundary 2","expected":"é","passed":false},{"actual":"oryyb!","check":"boundary 3","expected":"Uryyb!","passed":false},{"actual":"","check":"boundary 4","expected":"","passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"hog\", \"expected\": \"NoM\", \"passed\": false}, {\"check\": \"boundary 2\", \"actual\": \"t\", \"expected\": \"é\", \"passed\": false}, {\"check\": \"boundary 3\", \"actual\": \"oryyb!\", \"expected\": \"Uryyb!\", \"passed\": false}, {\"check\": \"boundary 4\", \"actual\": \"\", \"expected\": \"\", \"passed\": true}], \"passed\": false}\n"},"fixed":{"elapsed_ms":52.888,"exit_code":0,"observations":[{"actual":"NoM","check":"boundary 1","expected":"NoM","passed":true},{"actual":"é","check":"boundary 2","expected":"é","passed":true},{"actual":"Uryyb!","check":"boundary 3","expected":"Uryyb!","passed":true},{"actual":"","check":"boundary 4","expected":"","passed":true}],"passed":true,"stderr":"","stdout":"{\"observations\": [{\"check\": \"boundary 1\", \"actual\": \"NoM\", \"expected\": \"NoM\", \"passed\": true}, {\"check\": \"boundary 2\", \"actual\": \"é\", \"expected\": \"é\", \"passed\": true}, {\"check\": \"boundary 3\", \"actual\": \"Uryyb!\", \"expected\": \"Uryyb!\", \"passed\": true}, {\"check\": \"boundary 4\", \"actual\": \"\", \"expected\": \"\", \"passed\": true}], \"passed\": true}\n"}},"verified":true,"visibility":"public"}