{"abstract":"Replacing one extension command overwrites a peer command.","category":"Menu interactions","checks":7,"contract":"Contributed menu commands are namespaced, rank-stable, and replaceable only by their provider; removals retain unrelated content.","contract_signature":"action, p","evaluation_group":"s3-menu-interactions-contributor-merge","failed_approach":"The attempted repair `p['rows']+[p['new']]` still violates the replace oracle.","family":"s3-menu-interactions-contributor-merge-replace","id":"FA-32536","implementations":{"attempt":{"sha256":"7016d49d0440fa542816d0547928b3782104fa7b2ac6e9a5cbec5f50e8fda014","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nimport unicodedata\nN = 1\nobservations = []\ndef solve(action, p):\n    if action == 'namespace':\n        return p['provider']+':'+p['id']\n    if action == 'rank':\n        return sorted(p,key=lambda x:x['rank'])\n    if action == 'unload':\n        return [x for x in p['rows'] if x['provider']!=p['provider']]\n    if action == 'replace':\n        return p['rows']+[p['new']]\n    if action == 'disabled-provider':\n        return [x for x in p['rows'] if x['provider'] not in p['disabled']]\n    if action == 'revision-owner':\n        return p['revision'].get(p['provider'],0)\n    return {'error': 'unsupported menu operation'}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('namespace contract', solve('namespace', {'provider':'ext'+str(N),'id':'open'}), 'ext'+str(N)+':open')\ncheck('rank contract', solve('rank', [{'id':'z','rank':N},{'id':'a','rank':N+1}]), [{'id':'z','rank':N},{'id':'a','rank':N+1}])\ncheck('unload contract', solve('unload', {'rows':[{'provider':'a','id':N},{'provider':'b','id':N+1}],'provider':'a'}), [{'provider':'b','id':N+1}])\ncheck('replace contract', solve('replace', {'rows':[{'provider':'a','id':N,'v':0},{'provider':'b','id':N,'v':0}],'new':{'provider':'b','id':N,'v':1}}), [{'provider':'a','id':N,'v':0},{'provider':'b','id':N,'v':1}])\ncheck('disabled-provider contract', solve('disabled-provider', {'rows':[{'provider':'off','id':N},{'provider':'on','id':N+1}],'disabled':['off']}), [{'provider':'on','id':N+1}])\ncheck('revision-owner contract', solve('revision-owner', {'provider':'a','revision':{'a':N,'b':N+10}}), N)\ncheck('unknown operation', solve('unknown', {}), {'error': 'unsupported menu operation'})\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":"e5326bc1bf2176ade8c6c49fa33efe299ad08b6f1f93e91a250a6f63c91a1e22","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\nimport math\nimport unicodedata\nN = 1\nobservations = []\ndef solve(action, p):\n    if action == 'namespace':\n        return p['provider']+':'+p['id']\n    if action == 'rank':\n        return sorted(p,key=lambda x:x['rank'])\n    if action == 'unload':\n        return [x for x in p['rows'] if x['provider']!=p['provider']]\n    if action == 'replace':\n        return [p['new'] if x['id']==p['new']['id'] else x for x in p['rows']]\n    if action == 'disabled-provider':\n        return [x for x in p['rows'] if x['provider'] not in p['disabled']]\n    if action == 'revision-owner':\n        return p['revision'].get(p['provider'],0)\n    return {'error': 'unsupported menu operation'}\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\ncheck('namespace contract', solve('namespace', {'provider':'ext'+str(N),'id':'open'}), 'ext'+str(N)+':open')\ncheck('rank contract', solve('rank', [{'id':'z','rank':N},{'id':'a','rank':N+1}]), [{'id':'z','rank':N},{'id':'a','rank':N+1}])\ncheck('unload contract', solve('unload', {'rows':[{'provider':'a','id':N},{'provider':'b','id':N+1}],'provider':'a'}), [{'provider':'b','id':N+1}])\ncheck('replace contract', solve('replace', {'rows':[{'provider':'a','id':N,'v':0},{'provider':'b','id':N,'v':0}],'new':{'provider':'b','id':N,'v':1}}), [{'provider':'a','id':N,'v':0},{'provider':'b','id':N,'v':1}])\ncheck('disabled-provider contract', solve('disabled-provider', {'rows':[{'provider':'off','id':N},{'provider':'on','id':N+1}],'disabled':['off']}), [{'provider':'on','id':N+1}])\ncheck('revision-owner contract', solve('revision-owner', {'provider':'a','revision':{'a':N,'b':N+10}}), N)\ncheck('unknown operation', solve('unknown', {}), {'error': 'unsupported menu operation'})\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":"Offline supplied-valid-payload model; excludes DOM, keyboard, focus, selection, announcements and browser conformance. 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":"s3-menu-interactions-contributor-merge-replace","generated_at":"2026-09-29T14:42:13.260095+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Cascading and context menus require coherent command and session state as content changes.","root_cause":"The contributor-merge model applies `[p['new'] if x['id']==p['new']['id'] else x for x in p['rows']]` at its replace operation instead of the stipulated transformation.","sha256":"8937a8c0cf31b2adc391735b9b05399fa71833433dba6ceb0cb4d1dec1c5ffa7","title":"Replacing one extension command overwrites a peer command · 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":43.012,"exit_code":1,"observations":[{"actual":"ext1:open","check":"namespace contract","expected":"ext1:open","passed":true},{"actual":[{"id":"z","rank":1},{"id":"a","rank":2}],"check":"rank contract","expected":[{"id":"z","rank":1},{"id":"a","rank":2}],"passed":true},{"actual":[{"id":2,"provider":"b"}],"check":"unload contract","expected":[{"id":2,"provider":"b"}],"passed":true},{"actual":[{"id":1,"provider":"a","v":0},{"id":1,"provider":"b","v":0},{"id":1,"provider":"b","v":1}],"check":"replace contract","expected":[{"id":1,"provider":"a","v":0},{"id":1,"provider":"b","v":1}],"passed":false},{"actual":[{"id":2,"provider":"on"}],"check":"disabled-provider contract","expected":[{"id":2,"provider":"on"}],"passed":true},{"actual":1,"check":"revision-owner contract","expected":1,"passed":true},{"actual":{"error":"unsupported menu operation"},"check":"unknown operation","expected":{"error":"unsupported menu operation"},"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"namespace contract\", \"actual\": \"ext1:open\", \"expected\": \"ext1:open\", \"passed\": true}, {\"check\": \"rank contract\", \"actual\": [{\"id\": \"z\", \"rank\": 1}, {\"id\": \"a\", \"rank\": 2}], \"expected\": [{\"id\": \"z\", \"rank\": 1}, {\"id\": \"a\", \"rank\": 2}], \"passed\": true}, {\"check\": \"unload contract\", \"actual\": [{\"provider\": \"b\", \"id\": 2}], \"expected\": [{\"provider\": \"b\", \"id\": 2}], \"passed\": true}, {\"check\": \"replace contract\", \"actual\": [{\"provider\": \"a\", \"id\": 1, \"v\": 0}, {\"provider\": \"b\", \"id\": 1, \"v\": 0}, {\"provider\": \"b\", \"id\": 1, \"v\": 1}], \"expected\": [{\"provider\": \"a\", \"id\": 1, \"v\": 0}, {\"provider\": \"b\", \"id\": 1, \"v\": 1}], \"passed\": false}, {\"check\": \"disabled-provider contract\", \"actual\": [{\"provider\": \"on\", \"id\": 2}], \"expected\": [{\"provider\": \"on\", \"id\": 2}], \"passed\": true}, {\"check\": \"revision-owner contract\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"unknown operation\", \"actual\": {\"error\": \"unsupported menu operation\"}, \"expected\": {\"error\": \"unsupported menu operation\"}, \"passed\": true}], \"passed\": false}\n"},"broken":{"elapsed_ms":43.734,"exit_code":1,"observations":[{"actual":"ext1:open","check":"namespace contract","expected":"ext1:open","passed":true},{"actual":[{"id":"z","rank":1},{"id":"a","rank":2}],"check":"rank contract","expected":[{"id":"z","rank":1},{"id":"a","rank":2}],"passed":true},{"actual":[{"id":2,"provider":"b"}],"check":"unload contract","expected":[{"id":2,"provider":"b"}],"passed":true},{"actual":[{"id":1,"provider":"b","v":1},{"id":1,"provider":"b","v":1}],"check":"replace contract","expected":[{"id":1,"provider":"a","v":0},{"id":1,"provider":"b","v":1}],"passed":false},{"actual":[{"id":2,"provider":"on"}],"check":"disabled-provider contract","expected":[{"id":2,"provider":"on"}],"passed":true},{"actual":1,"check":"revision-owner contract","expected":1,"passed":true},{"actual":{"error":"unsupported menu operation"},"check":"unknown operation","expected":{"error":"unsupported menu operation"},"passed":true}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"namespace contract\", \"actual\": \"ext1:open\", \"expected\": \"ext1:open\", \"passed\": true}, {\"check\": \"rank contract\", \"actual\": [{\"id\": \"z\", \"rank\": 1}, {\"id\": \"a\", \"rank\": 2}], \"expected\": [{\"id\": \"z\", \"rank\": 1}, {\"id\": \"a\", \"rank\": 2}], \"passed\": true}, {\"check\": \"unload contract\", \"actual\": [{\"provider\": \"b\", \"id\": 2}], \"expected\": [{\"provider\": \"b\", \"id\": 2}], \"passed\": true}, {\"check\": \"replace contract\", \"actual\": [{\"provider\": \"b\", \"id\": 1, \"v\": 1}, {\"provider\": \"b\", \"id\": 1, \"v\": 1}], \"expected\": [{\"provider\": \"a\", \"id\": 1, \"v\": 0}, {\"provider\": \"b\", \"id\": 1, \"v\": 1}], \"passed\": false}, {\"check\": \"disabled-provider contract\", \"actual\": [{\"provider\": \"on\", \"id\": 2}], \"expected\": [{\"provider\": \"on\", \"id\": 2}], \"passed\": true}, {\"check\": \"revision-owner contract\", \"actual\": 1, \"expected\": 1, \"passed\": true}, {\"check\": \"unknown operation\", \"actual\": {\"error\": \"unsupported menu operation\"}, \"expected\": {\"error\": \"unsupported menu operation\"}, \"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."}}