{"abstract":"Aromatic bond tags are inferred from atom flags.","category":"Molecular graph representation","checks":6,"contract":"Return the explicit bond aromatic boolean unchanged. Atom aromatic flags are independent annotations and are never used to infer or override it.","contract_signature":"left, right, bond, atom_id","evaluation_group":"model-88aa8538e85243b0","failed_approach":"Requiring aromatic endpoints deletes explicit bond tags on partially annotated graphs.","family":"z-chemical_graphs-aromatic-tag","id":"FA-12461","implementations":{"attempt":{"sha256":"bd1a970cf255848fad746332308d52392525591fca1539e06a7de6a9676a6668","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(left, right, bond, atom_id):\n    return bond and left and right\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('bridge between annotated atoms', solve(True,True,False,N), False)\ncheck('explicit partial annotation', solve(True,False,True,N), True)\ncheck('neither atom annotated', solve(False,False,True,N), True)\ncheck('consistent aromatic', solve(True,True,bool(N % 2),N), bool(N % 2))\ncheck('plain bond', solve(False,False,bool(N % 2),N), bool(N % 2))\ncheck('single annotated atom', solve(False,True,False,N), False)\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":"e92f74106b389d85dd9a2b9b15f74c680e2620ff4971d2b1384a1a5edfd12bae","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(left, right, bond, atom_id):\n    return left and right\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('bridge between annotated atoms', solve(True,True,False,N), False)\ncheck('explicit partial annotation', solve(True,False,True,N), True)\ncheck('neither atom annotated', solve(False,False,True,N), True)\ncheck('consistent aromatic', solve(True,True,bool(N % 2),N), bool(N % 2))\ncheck('plain bond', solve(False,False,bool(N % 2),N), bool(N % 2))\ncheck('single annotated atom', solve(False,True,False,N), False)\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":"Toy representation only; no valence inference, chemical sanitization, synthesis, or real molecular identity determination. 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":"z-chemical_graphs-aromatic-tag","generated_at":"2026-09-29T14:38:57.126118+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Controlled molecular graph interchange model; tests isolate atom or bond representation errors without claiming chemical validity or production toolkit equivalence.","root_cause":"Two aromatic atom flags are treated as proof of an aromatic connecting bond.","sha256":"26ac1c7fb67a8bb45dd50fffbcc46b5ecca5cd53f01ca05562d74d57d01f2e44","title":"Aromatic bond tags are inferred from atom flags · 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":39.608,"exit_code":1,"observations":[{"actual":false,"check":"bridge between annotated atoms","expected":false,"passed":true},{"actual":false,"check":"explicit partial annotation","expected":true,"passed":false},{"actual":false,"check":"neither atom annotated","expected":true,"passed":false},{"actual":true,"check":"consistent aromatic","expected":true,"passed":true},{"actual":false,"check":"plain bond","expected":true,"passed":false},{"actual":false,"check":"single annotated atom","expected":false,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"bridge between annotated atoms\", \"actual\": false, \"expected\": false, \"passed\": true}, {\"check\": \"explicit partial annotation\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"neither atom annotated\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"consistent aromatic\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"plain bond\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"single annotated atom\", \"actual\": false, \"expected\": false, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":40.84,"exit_code":1,"observations":[{"actual":true,"check":"bridge between annotated atoms","expected":false,"passed":false},{"actual":false,"check":"explicit partial annotation","expected":true,"passed":false},{"actual":false,"check":"neither atom annotated","expected":true,"passed":false},{"actual":true,"check":"consistent aromatic","expected":true,"passed":true},{"actual":false,"check":"plain bond","expected":true,"passed":false},{"actual":false,"check":"single annotated atom","expected":false,"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"bridge between annotated atoms\", \"actual\": true, \"expected\": false, \"passed\": false}, {\"check\": \"explicit partial annotation\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"neither atom annotated\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"consistent aromatic\", \"actual\": true, \"expected\": true, \"passed\": true}, {\"check\": \"plain bond\", \"actual\": false, \"expected\": true, \"passed\": false}, {\"check\": \"single annotated atom\", \"actual\": false, \"expected\": false, \"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."}}