{"abstract":"Nested brackets resolve before their enclosing pair.","category":"Bidirectional text layout","checks":8,"contract":"Input [classes, bracket pairs, embedding level, sos]. Process pairs in opener order. Strong types inside (EN/AN count as R) matching the embedding direction set both brackets to it; if only the opposite direction is inside, use the first strong type before the opener (checking already-updated brackets; sos if none); with no strong type inside leave them. Return classes.","contract_signature":"x","evaluation_group":"w2-bidirectional-text-layout-bracket-resolution","failed_approach":"Reverse opener order processes inner pairs first as well.","family":"w2-bidirectional-text-layout-bracket-resolution-pair-processing-order","id":"FA-80621","implementations":{"attempt":{"sha256":"7aa0214e7d8d9420024143d8f153955400ef775d421e45c3c876386cf1627844","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    types, pairs, level, sos = x\n    t = list(types)\n    e = 'L' if level % 2 == 0 else 'R'\n    def dirof(c):\n        if c == 'L':\n            return 'L'\n        if c in ('R', 'EN', 'AN'):\n            return 'R'\n        return None\n    for o, c in reversed(sorted(pairs)):\n        inside = [dirof(t[k]) for k in range(o + 1, c)]\n        inside = [d for d in inside if d]\n        if not inside:\n            continue\n        if e in inside:\n            new = e\n        else:\n            ctx = sos\n            for k in range(o - 1, -1, -1):\n                d = dirof(t[k])\n                if d:\n                    ctx = d\n                    break\n            new = ctx\n        t[o] = new\n        t[c] = new\n    return t\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('nested pair uses updated outer bracket', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 0, 'L'], ['R', 'L', 'L', 'R', 'L', 'L', 'L']), ('regression: pair processing order', [['ON', 'ON', 'ON', 'AN', 'R', 'ON', 'L', 'EN', 'ON'], [[1, 8], [2, 5]], 0, 'R'], ['ON', 'L', 'L', 'AN', 'R', 'L', 'L', 'EN', 'L']), ('regression: pair processing order', [['R', 'ON', 'ON', 'ON', 'AN', 'ON', 'L', 'EN', 'ON', 'R'], [[1, 8], [2, 5]], 0, 'L'], ['R', 'L', 'L', 'ON', 'AN', 'L', 'L', 'EN', 'L', 'R']), ('regression: pair processing order', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON', 'L'], [[1, 6], [2, 4]], 1, 'L'], ['L', 'R', 'R', 'L', 'R', 'R', 'R', 'L']), ('number inside brackets in RTL context', [['R', 'ON', 'EN', 'ON'], [[1, 3]], 0, 'L'], ['R', 'R', 'EN', 'R']), ('nested pair in RTL embedding', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('control layout', [['ON', 'ON', 'R', 'L', 'L', 'L', 'R'], [[0, 1]], 2, 'L'], ['ON', 'ON', 'R', 'L', 'L', 'L', 'R']), ('control layout', [['R', 'R', 'EN', 'ON', 'EN', 'ON', 'ON', 'R', 'ON', 'ON', 'ON', 'ON'], [[5, 10], [3, 11]], 0, 'R'], ['R', 'R', 'EN', 'R', 'EN', 'R', 'ON', 'R', 'ON', 'ON', 'R', 'R'])], [('regression: pair processing order', [['ON', 'ON', 'ON', 'R', 'ON', 'L', 'R', 'ON', 'R', 'L'], [[1, 7], [2, 4]], 2, 'R'], ['ON', 'L', 'L', 'R', 'L', 'L', 'R', 'L', 'R', 'L']), ('regression: pair processing order', [['EN', 'ON', 'ON', 'AN', 'ON', 'R', 'L', 'ON', 'R', 'L'], [[1, 7], [2, 4]], 0, 'R'], ['EN', 'L', 'L', 'AN', 'L', 'R', 'L', 'L', 'R', 'L']), ('regression: pair processing order', [['ON', 'ON', 'ON', 'R', 'ON', 'ON', 'L', 'ON'], [[1, 7], [2, 4]], 2, 'R'], ['ON', 'L', 'L', 'R', 'L', 'ON', 'L', 'L']), ('regression: pair processing order', [['ON', 'ON', 'ON', 'L', 'ON', 'ON', 'R', 'ON'], [[1, 7], [2, 4]], 1, 'L'], ['ON', 'R', 'R', 'L', 'R', 'ON', 'R', 'R']), ('number inside brackets in RTL context', [['R', 'ON', 'EN', 'ON'], [[1, 3]], 0, 'L'], ['R', 'R', 'EN', 'R']), ('nested pair uses updated outer bracket', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 0, 'L'], ['R', 'L', 'L', 'R', 'L', 'L', 'L']), ('control layout', [['R', 'AN', 'ON', 'AN', 'L', 'L', 'AN'], [], 0, 'L'], ['R', 'AN', 'ON', 'AN', 'L', 'L', 'AN']), ('control layout', [['EN', 'ON', 'ON', 'ON', 'ON', 'R', 'L', 'ON', 'L', 'R'], [[1, 7], [2, 4]], 0, 'R'], ['EN', 'L', 'ON', 'ON', 'ON', 'R', 'L', 'L', 'L', 'R'])], [('regression: pair processing order', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON', 'L'], [[1, 6], [2, 4]], 2, 'R'], ['R', 'L', 'L', 'R', 'L', 'L', 'L', 'L']), ('regression: pair processing order', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('regression: pair processing order', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON', 'L'], [[1, 6], [2, 4]], 1, 'L'], ['L', 'R', 'R', 'L', 'R', 'R', 'R', 'L']), ('regression: pair processing order', [['EN', 'ON', 'ON', 'AN', 'ON', 'ON', 'L', 'ON', 'L'], [[1, 7], [2, 5]], 0, 'R'], ['EN', 'L', 'L', 'AN', 'ON', 'L', 'L', 'L', 'L']), ('nested pair in RTL embedding', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('nested pair uses updated outer bracket', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 0, 'L'], ['R', 'L', 'L', 'R', 'L', 'L', 'L']), ('control layout', [['L', 'EN', 'AN', 'R', 'EN', 'R', 'R', 'AN', 'EN', 'L'], [], 2, 'L'], ['L', 'EN', 'AN', 'R', 'EN', 'R', 'R', 'AN', 'EN', 'L']), ('control layout', [['R', 'L', 'ON', 'ON', 'ON', 'EN', 'R', 'AN', 'L', 'ON'], [[2, 3]], 1, 'R'], ['R', 'L', 'ON', 'ON', 'ON', 'EN', 'R', 'AN', 'L', 'ON'])], [('nested pair uses updated outer bracket', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 0, 'L'], ['R', 'L', 'L', 'R', 'L', 'L', 'L']), ('regression: pair processing order', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('regression: pair processing order', [['R', 'ON', 'ON', 'ON', 'AN', 'ON', 'L', 'EN', 'ON', 'R'], [[1, 8], [2, 5]], 0, 'L'], ['R', 'L', 'L', 'ON', 'AN', 'L', 'L', 'EN', 'L', 'R']), ('regression: pair processing order', [['EN', 'ON', 'ON', 'AN', 'ON', 'ON', 'L', 'ON', 'L', 'L'], [[1, 7], [2, 4]], 2, 'R'], ['EN', 'L', 'L', 'AN', 'L', 'ON', 'L', 'L', 'L', 'L']), ('number inside brackets in RTL context', [['R', 'ON', 'EN', 'ON'], [[1, 3]], 0, 'L'], ['R', 'R', 'EN', 'R']), ('nested pair in RTL embedding', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('control layout', [['R', 'ON', 'ON', 'AN', 'R', 'ON', 'ON', 'L', 'R'], [[1, 6], [2, 5]], 0, 'L'], ['R', 'R', 'R', 'AN', 'R', 'R', 'R', 'L', 'R']), ('control layout', [['AN', 'R', 'EN', 'ON', 'EN', 'ON', 'EN', 'ON', 'ON', 'ON', 'R'], [[5, 7]], 1, 'R'], ['AN', 'R', 'EN', 'ON', 'EN', 'R', 'EN', 'R', 'ON', 'ON', 'R'])], [('regression: pair processing order', [['ON', 'ON', 'ON', 'R', 'ON', 'L', 'R', 'ON', 'R'], [[1, 7], [2, 4]], 2, 'R'], ['ON', 'L', 'L', 'R', 'L', 'L', 'R', 'L', 'R']), ('nested pair in RTL embedding', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('regression: pair processing order', [['ON', 'ON', 'ON', 'R', 'ON', 'ON', 'L', 'ON'], [[1, 7], [2, 4]], 2, 'R'], ['ON', 'L', 'L', 'R', 'L', 'ON', 'L', 'L']), ('regression: pair processing order', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON', 'L'], [[1, 6], [2, 4]], 2, 'R'], ['R', 'L', 'L', 'R', 'L', 'L', 'L', 'L']), ('number inside brackets in RTL context', [['R', 'ON', 'EN', 'ON'], [[1, 3]], 0, 'L'], ['R', 'R', 'EN', 'R']), ('nested pair uses updated outer bracket', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 0, 'L'], ['R', 'L', 'L', 'R', 'L', 'L', 'L']), ('control layout', [['L', 'ON', 'ON', 'AN', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 2, 'L'], ['L', 'L', 'L', 'AN', 'L', 'L', 'L']), ('control layout', [['R', 'L', 'R', 'AN', 'AN', 'R', 'ON', 'L', 'ON', 'L', 'ON'], [], 0, 'L'], ['R', 'L', 'R', 'AN', 'AN', 'R', 'ON', 'L', 'ON', 'L', 'ON'])]]\nfor label, args, expected in fixtures[N - 1]:\n    check(label, solve(args), 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":"e6d1fc3b5bdb771b61246512f1ba1d02b83f24a5358675bcec6878d8935bbaee","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(x):\n    types, pairs, level, sos = x\n    t = list(types)\n    e = 'L' if level % 2 == 0 else 'R'\n    def dirof(c):\n        if c == 'L':\n            return 'L'\n        if c in ('R', 'EN', 'AN'):\n            return 'R'\n        return None\n    for o, c in sorted(pairs, key=lambda p: p[1]):\n        inside = [dirof(t[k]) for k in range(o + 1, c)]\n        inside = [d for d in inside if d]\n        if not inside:\n            continue\n        if e in inside:\n            new = e\n        else:\n            ctx = sos\n            for k in range(o - 1, -1, -1):\n                d = dirof(t[k])\n                if d:\n                    ctx = d\n                    break\n            new = ctx\n        t[o] = new\n        t[c] = new\n    return t\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[('nested pair uses updated outer bracket', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 0, 'L'], ['R', 'L', 'L', 'R', 'L', 'L', 'L']), ('regression: pair processing order', [['ON', 'ON', 'ON', 'AN', 'R', 'ON', 'L', 'EN', 'ON'], [[1, 8], [2, 5]], 0, 'R'], ['ON', 'L', 'L', 'AN', 'R', 'L', 'L', 'EN', 'L']), ('regression: pair processing order', [['R', 'ON', 'ON', 'ON', 'AN', 'ON', 'L', 'EN', 'ON', 'R'], [[1, 8], [2, 5]], 0, 'L'], ['R', 'L', 'L', 'ON', 'AN', 'L', 'L', 'EN', 'L', 'R']), ('regression: pair processing order', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON', 'L'], [[1, 6], [2, 4]], 1, 'L'], ['L', 'R', 'R', 'L', 'R', 'R', 'R', 'L']), ('number inside brackets in RTL context', [['R', 'ON', 'EN', 'ON'], [[1, 3]], 0, 'L'], ['R', 'R', 'EN', 'R']), ('nested pair in RTL embedding', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('control layout', [['ON', 'ON', 'R', 'L', 'L', 'L', 'R'], [[0, 1]], 2, 'L'], ['ON', 'ON', 'R', 'L', 'L', 'L', 'R']), ('control layout', [['R', 'R', 'EN', 'ON', 'EN', 'ON', 'ON', 'R', 'ON', 'ON', 'ON', 'ON'], [[5, 10], [3, 11]], 0, 'R'], ['R', 'R', 'EN', 'R', 'EN', 'R', 'ON', 'R', 'ON', 'ON', 'R', 'R'])], [('regression: pair processing order', [['ON', 'ON', 'ON', 'R', 'ON', 'L', 'R', 'ON', 'R', 'L'], [[1, 7], [2, 4]], 2, 'R'], ['ON', 'L', 'L', 'R', 'L', 'L', 'R', 'L', 'R', 'L']), ('regression: pair processing order', [['EN', 'ON', 'ON', 'AN', 'ON', 'R', 'L', 'ON', 'R', 'L'], [[1, 7], [2, 4]], 0, 'R'], ['EN', 'L', 'L', 'AN', 'L', 'R', 'L', 'L', 'R', 'L']), ('regression: pair processing order', [['ON', 'ON', 'ON', 'R', 'ON', 'ON', 'L', 'ON'], [[1, 7], [2, 4]], 2, 'R'], ['ON', 'L', 'L', 'R', 'L', 'ON', 'L', 'L']), ('regression: pair processing order', [['ON', 'ON', 'ON', 'L', 'ON', 'ON', 'R', 'ON'], [[1, 7], [2, 4]], 1, 'L'], ['ON', 'R', 'R', 'L', 'R', 'ON', 'R', 'R']), ('number inside brackets in RTL context', [['R', 'ON', 'EN', 'ON'], [[1, 3]], 0, 'L'], ['R', 'R', 'EN', 'R']), ('nested pair uses updated outer bracket', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 0, 'L'], ['R', 'L', 'L', 'R', 'L', 'L', 'L']), ('control layout', [['R', 'AN', 'ON', 'AN', 'L', 'L', 'AN'], [], 0, 'L'], ['R', 'AN', 'ON', 'AN', 'L', 'L', 'AN']), ('control layout', [['EN', 'ON', 'ON', 'ON', 'ON', 'R', 'L', 'ON', 'L', 'R'], [[1, 7], [2, 4]], 0, 'R'], ['EN', 'L', 'ON', 'ON', 'ON', 'R', 'L', 'L', 'L', 'R'])], [('regression: pair processing order', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON', 'L'], [[1, 6], [2, 4]], 2, 'R'], ['R', 'L', 'L', 'R', 'L', 'L', 'L', 'L']), ('regression: pair processing order', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('regression: pair processing order', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON', 'L'], [[1, 6], [2, 4]], 1, 'L'], ['L', 'R', 'R', 'L', 'R', 'R', 'R', 'L']), ('regression: pair processing order', [['EN', 'ON', 'ON', 'AN', 'ON', 'ON', 'L', 'ON', 'L'], [[1, 7], [2, 5]], 0, 'R'], ['EN', 'L', 'L', 'AN', 'ON', 'L', 'L', 'L', 'L']), ('nested pair in RTL embedding', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('nested pair uses updated outer bracket', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 0, 'L'], ['R', 'L', 'L', 'R', 'L', 'L', 'L']), ('control layout', [['L', 'EN', 'AN', 'R', 'EN', 'R', 'R', 'AN', 'EN', 'L'], [], 2, 'L'], ['L', 'EN', 'AN', 'R', 'EN', 'R', 'R', 'AN', 'EN', 'L']), ('control layout', [['R', 'L', 'ON', 'ON', 'ON', 'EN', 'R', 'AN', 'L', 'ON'], [[2, 3]], 1, 'R'], ['R', 'L', 'ON', 'ON', 'ON', 'EN', 'R', 'AN', 'L', 'ON'])], [('nested pair uses updated outer bracket', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 0, 'L'], ['R', 'L', 'L', 'R', 'L', 'L', 'L']), ('regression: pair processing order', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('regression: pair processing order', [['R', 'ON', 'ON', 'ON', 'AN', 'ON', 'L', 'EN', 'ON', 'R'], [[1, 8], [2, 5]], 0, 'L'], ['R', 'L', 'L', 'ON', 'AN', 'L', 'L', 'EN', 'L', 'R']), ('regression: pair processing order', [['EN', 'ON', 'ON', 'AN', 'ON', 'ON', 'L', 'ON', 'L', 'L'], [[1, 7], [2, 4]], 2, 'R'], ['EN', 'L', 'L', 'AN', 'L', 'ON', 'L', 'L', 'L', 'L']), ('number inside brackets in RTL context', [['R', 'ON', 'EN', 'ON'], [[1, 3]], 0, 'L'], ['R', 'R', 'EN', 'R']), ('nested pair in RTL embedding', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('control layout', [['R', 'ON', 'ON', 'AN', 'R', 'ON', 'ON', 'L', 'R'], [[1, 6], [2, 5]], 0, 'L'], ['R', 'R', 'R', 'AN', 'R', 'R', 'R', 'L', 'R']), ('control layout', [['AN', 'R', 'EN', 'ON', 'EN', 'ON', 'EN', 'ON', 'ON', 'ON', 'R'], [[5, 7]], 1, 'R'], ['AN', 'R', 'EN', 'ON', 'EN', 'R', 'EN', 'R', 'ON', 'ON', 'R'])], [('regression: pair processing order', [['ON', 'ON', 'ON', 'R', 'ON', 'L', 'R', 'ON', 'R'], [[1, 7], [2, 4]], 2, 'R'], ['ON', 'L', 'L', 'R', 'L', 'L', 'R', 'L', 'R']), ('nested pair in RTL embedding', [['L', 'ON', 'ON', 'L', 'ON', 'R', 'ON'], [[1, 6], [2, 4]], 1, 'R'], ['L', 'R', 'R', 'L', 'R', 'R', 'R']), ('regression: pair processing order', [['ON', 'ON', 'ON', 'R', 'ON', 'ON', 'L', 'ON'], [[1, 7], [2, 4]], 2, 'R'], ['ON', 'L', 'L', 'R', 'L', 'ON', 'L', 'L']), ('regression: pair processing order', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON', 'L'], [[1, 6], [2, 4]], 2, 'R'], ['R', 'L', 'L', 'R', 'L', 'L', 'L', 'L']), ('number inside brackets in RTL context', [['R', 'ON', 'EN', 'ON'], [[1, 3]], 0, 'L'], ['R', 'R', 'EN', 'R']), ('nested pair uses updated outer bracket', [['R', 'ON', 'ON', 'R', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 0, 'L'], ['R', 'L', 'L', 'R', 'L', 'L', 'L']), ('control layout', [['L', 'ON', 'ON', 'AN', 'ON', 'L', 'ON'], [[1, 6], [2, 4]], 2, 'L'], ['L', 'L', 'L', 'AN', 'L', 'L', 'L']), ('control layout', [['R', 'L', 'R', 'AN', 'AN', 'R', 'ON', 'L', 'ON', 'L', 'ON'], [], 0, 'L'], ['R', 'L', 'R', 'AN', 'AN', 'R', 'ON', 'L', 'ON', 'L', 'ON'])]]\nfor label, args, expected in fixtures[N - 1]:\n    check(label, solve(args), 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":"A deterministic toy bidi model over stipulated class labels and integer levels; it is inspired by, but does not claim conformance to, any published algorithm. 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":"w2-bidirectional-text-layout-bracket-resolution-pair-processing-order","generated_at":"2026-09-29T14:49:55.499798+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Mixed right-to-left and left-to-right text must resolve levels and visual order exactly, or words, numbers and carets land in the wrong place.","root_cause":"Pairs are processed in closing-bracket order.","sha256":"6b8597b7c19cfaf3f1a96abcdfd232439a7773e05954c317fd756cacf8df3a7e","title":"Paired bracket direction: pair processing order · 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":40.113,"exit_code":1,"observations":[{"actual":["R","L","R","R","R","L","L"],"check":"nested pair uses updated outer bracket","expected":["R","L","L","R","L","L","L"],"passed":false},{"actual":["ON","L","R","AN","R","R","L","EN","L"],"check":"regression: pair processing order","expected":["ON","L","L","AN","R","L","L","EN","L"],"passed":false},{"actual":["R","L","R","ON","AN","R","L","EN","L","R"],"check":"regression: pair processing order","expected":["R","L","L","ON","AN","L","L","EN","L","R"],"passed":false},{"actual":["L","R","L","L","L","R","R","L"],"check":"regression: pair processing order","expected":["L","R","R","L","R","R","R","L"],"passed":false},{"actual":["R","R","EN","R"],"check":"number inside brackets in RTL context","expected":["R","R","EN","R"],"passed":true},{"actual":["L","R","L","L","L","R","R"],"check":"nested pair in RTL 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\"expected\": [\"R\", \"L\", \"L\", \"ON\", \"AN\", \"L\", \"L\", \"EN\", \"L\", \"R\"], \"passed\": false}, {\"check\": \"regression: pair processing order\", \"actual\": [\"L\", \"R\", \"L\", \"L\", \"L\", \"R\", \"R\", \"L\"], \"expected\": [\"L\", \"R\", \"R\", \"L\", \"R\", \"R\", \"R\", \"L\"], \"passed\": false}, {\"check\": \"number inside brackets in RTL context\", \"actual\": [\"R\", \"R\", \"EN\", \"R\"], \"expected\": [\"R\", \"R\", \"EN\", \"R\"], \"passed\": true}, {\"check\": \"nested pair in RTL embedding\", \"actual\": [\"L\", \"R\", \"L\", \"L\", \"L\", \"R\", \"R\"], \"expected\": [\"L\", \"R\", \"R\", \"L\", \"R\", \"R\", \"R\"], \"passed\": false}, {\"check\": \"control layout\", \"actual\": [\"ON\", \"ON\", \"R\", \"L\", \"L\", \"L\", \"R\"], \"expected\": [\"ON\", \"ON\", \"R\", \"L\", \"L\", \"L\", \"R\"], \"passed\": true}, {\"check\": \"control layout\", \"actual\": [\"R\", \"R\", \"EN\", \"R\", \"EN\", \"R\", \"ON\", \"R\", \"ON\", \"ON\", \"R\", \"R\"], 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