{"abstract":"Among slots with the same ergonomic score, a higher level is picked over a lower one when its id sorts first.","category":"Warehouse slotting and bin packing","checks":8,"contract":"skus [[sku, weekly_picks, kg]], slots [[slot, level 1-5, ergonomic_score]]. Process SKUs by picks desc then sku. Each takes the best free eligible slot by score desc, level asc, slot id. Items over 20 kg may not be above level 2. Slots scoring 8+ are reserved for SKUs with at least 50 picks. No eligible slot -> None. Return [[sku, slot]] sorted by sku.","contract_signature":"skus, slots","evaluation_group":"w2-warehouse-slotting-golden-zone","failed_approach":"Sorting level descending among equal scores prefers the highest reach, the opposite of the rule.","family":"w2-warehouse-slotting-golden-zone-slot-preference-tiebreak","id":"FA-94881","implementations":{"attempt":{"sha256":"d6062c3d7b3555814664e3e5de58920bb6e8b68265ecf1610feea05b857a641c","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(skus, slots):\n    order = sorted(skus, key=lambda r: (-r[1], r[0]))\n    used = set()\n    out = {}\n    for sku, picks, kg in order:\n        best = None\n        for s in sorted(slots, key=lambda s: (-s[2], -s[1], s[0])):\n            sid, lvl, score = s\n            if sid in used:\n                continue\n            if kg > 20 and lvl > 2:\n                continue\n            if score >= 8 and picks < 50:\n                continue\n            best = sid\n            break\n        if best is not None:\n            used.add(best)\n        out[sku] = best\n    return [[k, out[k]] for k in sorted(out)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['generated mix 1', [[['K0', 120, 21], ['K1', 49, 20], ['K2', 120, 15]], [['L0', 1, 3], ['L1', 4, 3], ['L2', 1, 9], ['L3', 2, 3]]], [['K0', 'L2'], ['K1', 'L3'], ['K2', 'L0']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['generated mix 7', [[['K0', 51, 15], ['K1', 80, 30], ['K2', 10, 21]], [['L0', 1, 8], ['L1', 2, 3]]], [['K0', 'L1'], ['K1', 'L0'], ['K2', None]]], ['generated mix 15', [[['K0', 120, 21], ['K1', 0, 30], ['K2', 0, 21], ['K3', 80, 15], ['K4', 50, 2], ['K5', 80, 30]], [['L0', 5, 8], ['L1', 1, 3], ['L2', 3, 8], ['L3', 3, 6], ['L4', 2, 6], ['L5', 3, 10]]], [['K0', 'L4'], ['K1', None], ['K2', None], ['K3', 'L5'], ['K4', 'L2'], ['K5', 'L1']]]], [['generated mix 46', [[['K0', 80, 21], ['K1', 0, 15], ['K2', 80, 21]], [['L0', 2, 9], ['L1', 4, 3], ['L2', 3, 3], ['L3', 1, 9], ['L4', 2, 10]]], [['K0', 'L4'], ['K1', 'L2'], ['K2', 'L3']]], ['generated mix 23', [[['K0', 10, 15], ['K1', 80, 15], ['K2', 50, 2], ['K3', 51, 15], ['K4', 0, 21]], [['L0', 1, 6], ['L1', 3, 6], ['L2', 1, 9], ['L3', 3, 8]]], [['K0', 'L1'], ['K1', 'L2'], ['K2', 'L0'], ['K3', 'L3'], ['K4', None]]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['generated mix 9', [[['K0', 50, 20], ['K1', 50, 30], ['K2', 0, 21], ['K3', 10, 20], ['K4', 10, 20], ['K5', 51, 2]], [['L0', 3, 9], ['L1', 4, 6], ['L2', 2, 3]]], [['K0', 'L1'], ['K1', 'L2'], ['K2', None], ['K3', None], ['K4', None], ['K5', 'L0']]], ['generated mix 17', [[['K0', 50, 30]], [['L0', 3, 3], ['L1', 2, 5], ['L2', 2, 10], ['L3', 2, 10], ['L4', 3, 10]]], [['K0', 'L2']]]], [['generated mix 65', [[['K0', 49, 2], ['K1', 80, 15], ['K2', 120, 30], ['K3', 10, 21]], [['L0', 4, 9], ['L1', 1, 9], ['L2', 4, 3], ['L3', 2, 6], ['L4', 2, 9], ['L5', 2, 5], ['L6', 3, 6]]], [['K0', 'L3'], ['K1', 'L4'], ['K2', 'L1'], ['K3', 'L5']]], ['generated mix 40', [[['K0', 49, 20], ['K1', 50, 21], ['K2', 51, 15], ['K3', 10, 15]], [['L0', 2, 10], ['L1', 4, 8], ['L2', 1, 5], ['L3', 5, 10], ['L4', 2, 10], ['L5', 1, 9], ['L6', 4, 6]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L0'], ['K3', 'L2']]], ['exactly 20 kg is not heavy', [[['e', 5, 20]], [['t', 4, 7], ['u', 1, 3]]], [['e', 't']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['generated mix 20', [[['K0', 50, 15]], [['L0', 4, 3], ['L1', 3, 10], ['L2', 4, 8], ['L3', 5, 9]]], [['K0', 'L1']]], ['generated mix 28', [[['K0', 51, 20]], [['L0', 4, 5], ['L1', 4, 3], ['L2', 2, 8], ['L3', 2, 3], ['L4', 5, 6], ['L5', 5, 10]]], [['K0', 'L5']]]], [['generated mix 4', [[['K0', 120, 20], ['K1', 0, 30]], [['L0', 5, 3], ['L1', 5, 10], ['L2', 5, 10], ['L3', 2, 10], ['L4', 3, 3], ['L5', 1, 6], ['L6', 4, 3]]], [['K0', 'L3'], ['K1', 'L5']]], ['generated mix 50', [[['K0', 120, 21], ['K1', 49, 21], ['K2', 49, 2], ['K3', 49, 20], ['K4', 49, 15], ['K5', 80, 20]], [['L0', 2, 3], ['L1', 5, 10], ['L2', 3, 9], ['L3', 2, 5], ['L4', 1, 5], ['L5', 3, 3], ['L6', 1, 8]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L0'], ['K4', 'L5'], ['K5', 'L1']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['two skus compete', [[['a', 90, 1], ['b', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['exactly 20 kg is not heavy', [[['e', 5, 20]], [['t', 4, 7], ['u', 1, 3]]], [['e', 't']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['generated mix 32', [[['K0', 51, 2], ['K1', 51, 21]], [['L0', 1, 3], ['L1', 5, 6], ['L2', 5, 10], ['L3', 2, 9], ['L4', 3, 8], ['L5', 5, 5]]], [['K0', 'L2'], ['K1', 'L3']]], ['generated mix 40', [[['K0', 49, 20], ['K1', 50, 21], ['K2', 51, 15], ['K3', 10, 15]], [['L0', 2, 10], ['L1', 4, 8], ['L2', 1, 5], ['L3', 5, 10], ['L4', 2, 10], ['L5', 1, 9], ['L6', 4, 6]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L0'], ['K3', 'L2']]]], [['generated mix 50', [[['K0', 120, 21], ['K1', 49, 21], ['K2', 49, 2], ['K3', 49, 20], ['K4', 49, 15], ['K5', 80, 20]], [['L0', 2, 3], ['L1', 5, 10], ['L2', 3, 9], ['L3', 2, 5], ['L4', 1, 5], ['L5', 3, 3], ['L6', 1, 8]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L0'], ['K4', 'L5'], ['K5', 'L1']]], ['generated mix 62', [[['K0', 49, 20], ['K1', 80, 30], ['K2', 120, 21], ['K3', 0, 20], ['K4', 80, 15]], [['L0', 3, 3], ['L1', 4, 10], ['L2', 2, 10], ['L3', 5, 3], ['L4', 2, 9], ['L5', 1, 6], ['L6', 4, 10]]], [['K0', 'L5'], ['K1', 'L4'], ['K2', 'L2'], ['K3', 'L0'], ['K4', 'L1']]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['two skus compete', [[['a', 90, 1], ['b', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['generated mix 42', [[['K0', 51, 15]], [['L0', 5, 6], ['L1', 4, 10], ['L2', 1, 8], ['L3', 3, 9], ['L4', 4, 8]]], [['K0', 'L1']]], ['generated mix 51', [[['K0', 0, 21], ['K1', 80, 2], ['K2', 10, 20], ['K3', 80, 20]], [['L0', 5, 9], ['L1', 5, 9], ['L2', 1, 8], ['L3', 2, 3], ['L4', 1, 9], ['L5', 4, 8], ['L6', 4, 9]]], [['K0', None], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L6']]]]]\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":"188418bab18ffc4d25f1d829cb4716d6f458860bef0ad2187b756ba4c910dd20","source":"\"\"\"Failure Map reference implementation. Python standard library only.\"\"\"\nimport json\n\nN = 1\nobservations = []\ndef solve(skus, slots):\n    order = sorted(skus, key=lambda r: (-r[1], r[0]))\n    used = set()\n    out = {}\n    for sku, picks, kg in order:\n        best = None\n        for s in sorted(slots, key=lambda s: (-s[2], s[0])):\n            sid, lvl, score = s\n            if sid in used:\n                continue\n            if kg > 20 and lvl > 2:\n                continue\n            if score >= 8 and picks < 50:\n                continue\n            best = sid\n            break\n        if best is not None:\n            used.add(best)\n        out[sku] = best\n    return [[k, out[k]] for k in sorted(out)]\ndef check(label, actual, expected):\n    observations.append({\"check\": label, \"actual\": actual, \"expected\": expected, \"passed\": actual == expected})\nfixtures = [[['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['generated mix 1', [[['K0', 120, 21], ['K1', 49, 20], ['K2', 120, 15]], [['L0', 1, 3], ['L1', 4, 3], ['L2', 1, 9], ['L3', 2, 3]]], [['K0', 'L2'], ['K1', 'L3'], ['K2', 'L0']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['generated mix 7', [[['K0', 51, 15], ['K1', 80, 30], ['K2', 10, 21]], [['L0', 1, 8], ['L1', 2, 3]]], [['K0', 'L1'], ['K1', 'L0'], ['K2', None]]], ['generated mix 15', [[['K0', 120, 21], ['K1', 0, 30], ['K2', 0, 21], ['K3', 80, 15], ['K4', 50, 2], ['K5', 80, 30]], [['L0', 5, 8], ['L1', 1, 3], ['L2', 3, 8], ['L3', 3, 6], ['L4', 2, 6], ['L5', 3, 10]]], [['K0', 'L4'], ['K1', None], ['K2', None], ['K3', 'L5'], ['K4', 'L2'], ['K5', 'L1']]]], [['generated mix 46', [[['K0', 80, 21], ['K1', 0, 15], ['K2', 80, 21]], [['L0', 2, 9], ['L1', 4, 3], ['L2', 3, 3], ['L3', 1, 9], ['L4', 2, 10]]], [['K0', 'L4'], ['K1', 'L2'], ['K2', 'L3']]], ['generated mix 23', [[['K0', 10, 15], ['K1', 80, 15], ['K2', 50, 2], ['K3', 51, 15], ['K4', 0, 21]], [['L0', 1, 6], ['L1', 3, 6], ['L2', 1, 9], ['L3', 3, 8]]], [['K0', 'L1'], ['K1', 'L2'], ['K2', 'L0'], ['K3', 'L3'], ['K4', None]]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['generated mix 9', [[['K0', 50, 20], ['K1', 50, 30], ['K2', 0, 21], ['K3', 10, 20], ['K4', 10, 20], ['K5', 51, 2]], [['L0', 3, 9], ['L1', 4, 6], ['L2', 2, 3]]], [['K0', 'L1'], ['K1', 'L2'], ['K2', None], ['K3', None], ['K4', None], ['K5', 'L0']]], ['generated mix 17', [[['K0', 50, 30]], [['L0', 3, 3], ['L1', 2, 5], ['L2', 2, 10], ['L3', 2, 10], ['L4', 3, 10]]], [['K0', 'L2']]]], [['generated mix 65', [[['K0', 49, 2], ['K1', 80, 15], ['K2', 120, 30], ['K3', 10, 21]], [['L0', 4, 9], ['L1', 1, 9], ['L2', 4, 3], ['L3', 2, 6], ['L4', 2, 9], ['L5', 2, 5], ['L6', 3, 6]]], [['K0', 'L3'], ['K1', 'L4'], ['K2', 'L1'], ['K3', 'L5']]], ['generated mix 40', [[['K0', 49, 20], ['K1', 50, 21], ['K2', 51, 15], ['K3', 10, 15]], [['L0', 2, 10], ['L1', 4, 8], ['L2', 1, 5], ['L3', 5, 10], ['L4', 2, 10], ['L5', 1, 9], ['L6', 4, 6]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L0'], ['K3', 'L2']]], ['exactly 20 kg is not heavy', [[['e', 5, 20]], [['t', 4, 7], ['u', 1, 3]]], [['e', 't']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['no eligible slot', [[['w', 5, 40]], [['a', 4, 5]]], [['w', None]]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['generated mix 20', [[['K0', 50, 15]], [['L0', 4, 3], ['L1', 3, 10], ['L2', 4, 8], ['L3', 5, 9]]], [['K0', 'L1']]], ['generated mix 28', [[['K0', 51, 20]], [['L0', 4, 5], ['L1', 4, 3], ['L2', 2, 8], ['L3', 2, 3], ['L4', 5, 6], ['L5', 5, 10]]], [['K0', 'L5']]]], [['generated mix 4', [[['K0', 120, 20], ['K1', 0, 30]], [['L0', 5, 3], ['L1', 5, 10], ['L2', 5, 10], ['L3', 2, 10], ['L4', 3, 3], ['L5', 1, 6], ['L6', 4, 3]]], [['K0', 'L3'], ['K1', 'L5']]], ['generated mix 50', [[['K0', 120, 21], ['K1', 49, 21], ['K2', 49, 2], ['K3', 49, 20], ['K4', 49, 15], ['K5', 80, 20]], [['L0', 2, 3], ['L1', 5, 10], ['L2', 3, 9], ['L3', 2, 5], ['L4', 1, 5], ['L5', 3, 3], ['L6', 1, 8]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L0'], ['K4', 'L5'], ['K5', 'L1']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['two skus compete', [[['a', 90, 1], ['b', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['exactly 20 kg is not heavy', [[['e', 5, 20]], [['t', 4, 7], ['u', 1, 3]]], [['e', 't']]], ['reservation at 50 picks', [[['f', 50, 5], ['s', 49, 5]], [['g', 2, 8], ['n', 1, 6]]], [['f', 'g'], ['s', 'n']]], ['generated mix 32', [[['K0', 51, 2], ['K1', 51, 21]], [['L0', 1, 3], ['L1', 5, 6], ['L2', 5, 10], ['L3', 2, 9], ['L4', 3, 8], ['L5', 5, 5]]], [['K0', 'L2'], ['K1', 'L3']]], ['generated mix 40', [[['K0', 49, 20], ['K1', 50, 21], ['K2', 51, 15], ['K3', 10, 15]], [['L0', 2, 10], ['L1', 4, 8], ['L2', 1, 5], ['L3', 5, 10], ['L4', 2, 10], ['L5', 1, 9], ['L6', 4, 6]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L0'], ['K3', 'L2']]]], [['generated mix 50', [[['K0', 120, 21], ['K1', 49, 21], ['K2', 49, 2], ['K3', 49, 20], ['K4', 49, 15], ['K5', 80, 20]], [['L0', 2, 3], ['L1', 5, 10], ['L2', 3, 9], ['L3', 2, 5], ['L4', 1, 5], ['L5', 3, 3], ['L6', 1, 8]]], [['K0', 'L6'], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L0'], ['K4', 'L5'], ['K5', 'L1']]], ['generated mix 62', [[['K0', 49, 20], ['K1', 80, 30], ['K2', 120, 21], ['K3', 0, 20], ['K4', 80, 15]], [['L0', 3, 3], ['L1', 4, 10], ['L2', 2, 10], ['L3', 5, 3], ['L4', 2, 9], ['L5', 1, 6], ['L6', 4, 10]]], [['K0', 'L5'], ['K1', 'L4'], ['K2', 'L2'], ['K3', 'L0'], ['K4', 'L1']]], ['tie in feed order', [[['b', 90, 1], ['a', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['heavy on level 2 ok', [[['h', 60, 25]], [['a', 3, 9], ['b', 2, 7]]], [['h', 'b']]], ['score tie prefers low level', [[['q', 10, 1]], [['z', 1, 6], ['a', 3, 6]]], [['q', 'z']]], ['two skus compete', [[['a', 90, 1], ['b', 90, 1]], [['s1', 2, 9], ['s2', 3, 5]]], [['a', 's1'], ['b', 's2']]], ['generated mix 42', [[['K0', 51, 15]], [['L0', 5, 6], ['L1', 4, 10], ['L2', 1, 8], ['L3', 3, 9], ['L4', 4, 8]]], [['K0', 'L1']]], ['generated mix 51', [[['K0', 0, 21], ['K1', 80, 2], ['K2', 10, 20], ['K3', 80, 20]], [['L0', 5, 9], ['L1', 5, 9], ['L2', 1, 8], ['L3', 2, 3], ['L4', 1, 9], ['L5', 4, 8], ['L6', 4, 9]]], [['K0', None], ['K1', 'L4'], ['K2', 'L3'], ['K3', 'L6']]]]]\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":"Greedy stipulated slotting policy; real slotting optimizers weigh many more factors. 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-warehouse-slotting-golden-zone-slot-preference-tiebreak","generated_at":"2026-09-29T14:52:08.560246+00:00","license":"CC0-1.0","python":"3.12.14","seed":1,"split":"open-access"},"relevance":"Forward pick slotting places the fastest movers in ergonomic golden-zone locations.","root_cause":"The slot preference drops the level tie-break and orders equal scores only by slot id.","sha256":"44a1db54a8f1fc2b66853c5773a963f0b8bac3f924ac562b17d82cccf79398e8","title":"Golden zone: equal-score slots ignore level · 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":43.618,"exit_code":1,"observations":[{"actual":[["q","a"]],"check":"score tie prefers low level","expected":[["q","z"]],"passed":false},{"actual":[["K0","L2"],["K1","L3"],["K2","L1"]],"check":"generated mix 1","expected":[["K0","L2"],["K1","L3"],["K2","L0"]],"passed":false},{"actual":[["h","b"]],"check":"heavy on level 2 ok","expected":[["h","b"]],"passed":true},{"actual":[["w",null]],"check":"no eligible slot","expected":[["w",null]],"passed":true},{"actual":[["a","s1"],["b","s2"]],"check":"tie in feed order","expected":[["a","s1"],["b","s2"]],"passed":true},{"actual":[["f","g"],["s","n"]],"check":"reservation at 50 picks","expected":[["f","g"],["s","n"]],"passed":true},{"actual":[["K0","L1"],["K1","L0"],["K2",null]],"check":"generated mix 7","expected":[["K0","L1"],["K1","L0"],["K2",null]],"passed":true},{"actual":[["K0","L4"],["K1",null],["K2",null],["K3","L5"],["K4","L0"],["K5","L1"]],"check":"generated mix 15","expected":[["K0","L4"],["K1",null],["K2",null],["K3","L5"],["K4","L2"],["K5","L1"]],"passed":false}],"passed":false,"stderr":"","stdout":"{\"observations\": [{\"check\": \"score tie prefers low level\", \"actual\": [[\"q\", \"a\"]], \"expected\": [[\"q\", \"z\"]], \"passed\": false}, {\"check\": \"generated mix 1\", \"actual\": [[\"K0\", \"L2\"], [\"K1\", \"L3\"], [\"K2\", \"L1\"]], \"expected\": [[\"K0\", \"L2\"], [\"K1\", \"L3\"], [\"K2\", \"L0\"]], \"passed\": false}, {\"check\": \"heavy on level 2 ok\", \"actual\": [[\"h\", \"b\"]], \"expected\": [[\"h\", \"b\"]], \"passed\": true}, {\"check\": \"no eligible slot\", \"actual\": [[\"w\", null]], \"expected\": [[\"w\", null]], \"passed\": true}, {\"check\": \"tie in feed order\", \"actual\": [[\"a\", \"s1\"], [\"b\", \"s2\"]], \"expected\": [[\"a\", \"s1\"], 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