{"abstract":"The tab workspace reports an incorrect group detachment.","category":"Tab interfaces","checks":6,"contract":"Pinning a tab removes it from its group, moves it behind existing pins, shrinks group count and dissolves empty group headers while keeping selection.","contract_signature":"x","evaluation_group":"s3-tabs-pin-group-interaction","failed_approach":"The partial repair [] still violates a workspace boundary or normal case.","family":"s3-tab-interfaces-pin-group-interaction-group-detachment","id":"FA-36001","implementations":{"attempt":{"sha256":"88e4cd8f7cc04978294496eda883bf063ed49412a47c87a68030c608ba9490d8","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    r0 = []\n    r1 = x['pins']+[x['pin']] if x['pin'] not in x['pins'] else x['pins']\n    r2 = len(x['pins'])\n    r3 = sum(t!=x['pin'] for t in x['members'])\n    r4 = not any(t!=x['pin'] for t in x['members'])\n    r5 = x['active']\n    return [r0,r1,r2,r3,r4,r5]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = {1: [({'tabs': ['p', 'a', 'b', 'c'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['p', 'b'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'a', 'active': 'a'}, [['b'], ['p', 'a'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c'], 'pins': ['p'], 'members': ['b'], 'pin': 'b', 'active': 'a'}, [[], ['p', 'b'], 1, 0, True, 'a']), ({'tabs': ['p', 'a', 'b', 'c'], 'pins': [], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['b'], 0, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'b'}, [['a'], ['p', 'b'], 1, 1, False, 'b']), ({'tabs': ['p', 'a', 'b', 'c'], 'pins': ['p'], 'members': ['a', 'b', 'c'], 'pin': 'b', 'active': 'a'}, [['a', 'c'], ['p', 'b'], 1, 2, False, 'a'])], 2: [({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['p', 'b'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'a', 'active': 'a'}, [['b'], ['p', 'a'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': ['p'], 'members': ['b'], 'pin': 'b', 'active': 'a'}, [[], ['p', 'b'], 1, 0, True, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': [], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['b'], 0, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'b'}, [['a'], ['p', 'b'], 1, 1, False, 'b']), ({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': ['p'], 'members': ['a', 'b', 'c'], 'pin': 'b', 'active': 'a'}, [['a', 'c'], ['p', 'b'], 1, 2, False, 'a'])], 3: [({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['p', 'b'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'a', 'active': 'a'}, [['b'], ['p', 'a'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': ['p'], 'members': ['b'], 'pin': 'b', 'active': 'a'}, [[], ['p', 'b'], 1, 0, True, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': [], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['b'], 0, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'b'}, [['a'], ['p', 'b'], 1, 1, False, 'b']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': ['p'], 'members': ['a', 'b', 'c'], 'pin': 'b', 'active': 'a'}, [['a', 'c'], ['p', 'b'], 1, 2, False, 'a'])], 4: [({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['p', 'b'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'a', 'active': 'a'}, [['b'], ['p', 'a'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': ['p'], 'members': ['b'], 'pin': 'b', 'active': 'a'}, [[], ['p', 'b'], 1, 0, True, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': [], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['b'], 0, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'b'}, [['a'], ['p', 'b'], 1, 1, False, 'b']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': ['p'], 'members': ['a', 'b', 'c'], 'pin': 'b', 'active': 'a'}, [['a', 'c'], ['p', 'b'], 1, 2, False, 'a'])], 5: [({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['p', 'b'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'a', 'active': 'a'}, [['b'], ['p', 'a'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': ['p'], 'members': ['b'], 'pin': 'b', 'active': 'a'}, [[], ['p', 'b'], 1, 0, True, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': [], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['b'], 0, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'b'}, [['a'], ['p', 'b'], 1, 1, False, 'b']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': ['p'], 'members': ['a', 'b', 'c'], 'pin': 'b', 'active': 'a'}, [['a', 'c'], ['p', 'b'], 1, 2, False, 'a'])]}\nfor i, (inputs, expected) in enumerate(fixtures[N]):\n    check(\"workspace regression \"+str(i), solve(inputs), expected)\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":"3691b18753f915c0680b774111b80f2ec123eac5c702b4db2790e6633668dfaf","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    r0 = x['members']\n    r1 = x['pins']+[x['pin']] if x['pin'] not in x['pins'] else x['pins']\n    r2 = len(x['pins'])\n    r3 = sum(t!=x['pin'] for t in x['members'])\n    r4 = not any(t!=x['pin'] for t in x['members'])\n    r5 = x['active']\n    return [r0,r1,r2,r3,r4,r5]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = {1: [({'tabs': ['p', 'a', 'b', 'c'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['p', 'b'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'a', 'active': 'a'}, [['b'], ['p', 'a'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c'], 'pins': ['p'], 'members': ['b'], 'pin': 'b', 'active': 'a'}, [[], ['p', 'b'], 1, 0, True, 'a']), ({'tabs': ['p', 'a', 'b', 'c'], 'pins': [], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['b'], 0, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'b'}, [['a'], ['p', 'b'], 1, 1, False, 'b']), ({'tabs': ['p', 'a', 'b', 'c'], 'pins': ['p'], 'members': ['a', 'b', 'c'], 'pin': 'b', 'active': 'a'}, [['a', 'c'], ['p', 'b'], 1, 2, False, 'a'])], 2: [({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['p', 'b'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'a', 'active': 'a'}, [['b'], ['p', 'a'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': ['p'], 'members': ['b'], 'pin': 'b', 'active': 'a'}, [[], ['p', 'b'], 1, 0, True, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': [], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['b'], 0, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'b'}, [['a'], ['p', 'b'], 1, 1, False, 'b']), ({'tabs': ['p', 'a', 'b', 'c', 'background0'], 'pins': ['p'], 'members': ['a', 'b', 'c'], 'pin': 'b', 'active': 'a'}, [['a', 'c'], ['p', 'b'], 1, 2, False, 'a'])], 3: [({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['p', 'b'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'a', 'active': 'a'}, [['b'], ['p', 'a'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': ['p'], 'members': ['b'], 'pin': 'b', 'active': 'a'}, [[], ['p', 'b'], 1, 0, True, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': [], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['b'], 0, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'b'}, [['a'], ['p', 'b'], 1, 1, False, 'b']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1'], 'pins': ['p'], 'members': ['a', 'b', 'c'], 'pin': 'b', 'active': 'a'}, [['a', 'c'], ['p', 'b'], 1, 2, False, 'a'])], 4: [({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['p', 'b'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'a', 'active': 'a'}, [['b'], ['p', 'a'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': ['p'], 'members': ['b'], 'pin': 'b', 'active': 'a'}, [[], ['p', 'b'], 1, 0, True, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': [], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['b'], 0, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'b'}, [['a'], ['p', 'b'], 1, 1, False, 'b']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2'], 'pins': ['p'], 'members': ['a', 'b', 'c'], 'pin': 'b', 'active': 'a'}, [['a', 'c'], ['p', 'b'], 1, 2, False, 'a'])], 5: [({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['p', 'b'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'a', 'active': 'a'}, [['b'], ['p', 'a'], 1, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': ['p'], 'members': ['b'], 'pin': 'b', 'active': 'a'}, [[], ['p', 'b'], 1, 0, True, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': [], 'members': ['a', 'b'], 'pin': 'b', 'active': 'a'}, [['a'], ['b'], 0, 1, False, 'a']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': ['p'], 'members': ['a', 'b'], 'pin': 'b', 'active': 'b'}, [['a'], ['p', 'b'], 1, 1, False, 'b']), ({'tabs': ['p', 'a', 'b', 'c', 'background0', 'background1', 'background2', 'background3'], 'pins': ['p'], 'members': ['a', 'b', 'c'], 'pin': 'b', 'active': 'a'}, [['a', 'c'], ['p', 'b'], 1, 2, False, 'a'])]}\nfor i, (inputs, expected) in enumerate(fixtures[N]):\n    check(\"workspace regression \"+str(i), solve(inputs), expected)\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":"Finite stipulated workspace snapshots only. Independent result fields describe observable obligations, not a full UI runtime. 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-tab-interfaces-pin-group-interaction-group-detachment","generated_at":"2026-09-29T14:42:47.223241+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Offline tab/panel workspace behavior; no browser or desktop framework is emulated.","root_cause":"The group detachment decision uses x['members'] instead of [t for t in x['members'] if t!=x['pin']].","sha256":"f8527b02f94face81eabe0e56fe1181d86249be338dac60b64e6dcd4476bcd7f","title":"Pin group interaction: group detachment · 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":40.51,"exit_code":1,"observations":[{"actual":[[],["p","b"],1,1,false,"a"],"check":"workspace regression 0","expected":[["a"],["p","b"],1,1,false,"a"],"passed":false},{"actual":[[],["p","a"],1,1,false,"a"],"check":"workspace regression 1","expected":[["b"],["p","a"],1,1,false,"a"],"passed":false},{"actual":[[],["p","b"],1,0,true,"a"],"check":"workspace regression 2","expected":[[],["p","b"],1,0,true,"a"],"passed":true},{"actual":[[],["b"],0,1,false,"a"],"check":"workspace regression 3","expected":[["a"],["b"],0,1,false,"a"],"passed":false},{"actual":[[],["p","b"],1,1,false,"b"],"check":"workspace regression 4","expected":[["a"],["p","b"],1,1,false,"b"],"passed":false},{"actual":[[],["p","b"],1,2,false,"a"],"check":"workspace regression 5","expected":[["a","c"],["p","b"],1,2,false,"a"],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"workspace regression 0\", \"actual\": [[], [\"p\", \"b\"], 1, 1, false, \"a\"], \"expected\": [[\"a\"], [\"p\", \"b\"], 1, 1, false, \"a\"], \"passed\": false}, {\"check\": \"workspace regression 1\", \"actual\": [[], [\"p\", \"a\"], 1, 1, false, \"a\"], \"expected\": [[\"b\"], [\"p\", \"a\"], 1, 1, false, \"a\"], \"passed\": false}, {\"check\": \"workspace regression 2\", \"actual\": [[], [\"p\", \"b\"], 1, 0, true, \"a\"], \"expected\": [[], [\"p\", \"b\"], 1, 0, true, \"a\"], \"passed\": true}, {\"check\": \"workspace regression 3\", \"actual\": [[], [\"b\"], 0, 1, false, \"a\"], \"expected\": [[\"a\"], [\"b\"], 0, 1, false, \"a\"], \"passed\": false}, {\"check\": \"workspace regression 4\", \"actual\": [[], [\"p\", \"b\"], 1, 1, false, \"b\"], \"expected\": [[\"a\"], [\"p\", \"b\"], 1, 1, false, \"b\"], \"passed\": false}, {\"check\": \"workspace regression 5\", \"actual\": [[], [\"p\", \"b\"], 1, 2, false, \"a\"], \"expected\": [[\"a\", \"c\"], [\"p\", \"b\"], 1, 2, false, \"a\"], \"passed\": false}], \"passed\": false}\n"},"broken":{"elapsed_ms":41.593,"exit_code":1,"observations":[{"actual":[["a","b"],["p","b"],1,1,false,"a"],"check":"workspace regression 0","expected":[["a"],["p","b"],1,1,false,"a"],"passed":false},{"actual":[["a","b"],["p","a"],1,1,false,"a"],"check":"workspace regression 1","expected":[["b"],["p","a"],1,1,false,"a"],"passed":false},{"actual":[["b"],["p","b"],1,0,true,"a"],"check":"workspace regression 2","expected":[[],["p","b"],1,0,true,"a"],"passed":false},{"actual":[["a","b"],["b"],0,1,false,"a"],"check":"workspace regression 3","expected":[["a"],["b"],0,1,false,"a"],"passed":false},{"actual":[["a","b"],["p","b"],1,1,false,"b"],"check":"workspace regression 4","expected":[["a"],["p","b"],1,1,false,"b"],"passed":false},{"actual":[["a","b","c"],["p","b"],1,2,false,"a"],"check":"workspace regression 5","expected":[["a","c"],["p","b"],1,2,false,"a"],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"workspace regression 0\", \"actual\": [[\"a\", \"b\"], [\"p\", \"b\"], 1, 1, false, \"a\"], \"expected\": [[\"a\"], [\"p\", \"b\"], 1, 1, false, \"a\"], \"passed\": false}, {\"check\": \"workspace regression 1\", \"actual\": [[\"a\", \"b\"], [\"p\", \"a\"], 1, 1, false, \"a\"], \"expected\": [[\"b\"], [\"p\", \"a\"], 1, 1, false, \"a\"], \"passed\": false}, {\"check\": \"workspace regression 2\", \"actual\": [[\"b\"], [\"p\", \"b\"], 1, 0, true, \"a\"], \"expected\": [[], [\"p\", \"b\"], 1, 0, true, \"a\"], \"passed\": false}, {\"check\": \"workspace regression 3\", \"actual\": [[\"a\", \"b\"], [\"b\"], 0, 1, false, \"a\"], \"expected\": [[\"a\"], [\"b\"], 0, 1, false, \"a\"], \"passed\": false}, {\"check\": \"workspace regression 4\", \"actual\": [[\"a\", \"b\"], [\"p\", \"b\"], 1, 1, false, \"b\"], \"expected\": [[\"a\"], [\"p\", \"b\"], 1, 1, false, \"b\"], \"passed\": false}, {\"check\": \"workspace regression 5\", \"actual\": [[\"a\", \"b\", \"c\"], [\"p\", \"b\"], 1, 2, false, \"a\"], \"expected\": [[\"a\", \"c\"], [\"p\", \"b\"], 1, 2, false, \"a\"], \"passed\": false}], \"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."}}