{
  "format": "qwen4-exp-ngram-selection-validation-v1",
  "selection_manifest_sha256": "491d959690a26ac3f3b5f9db07cd16f2dbb92a999330d98622aaef1c728045ed",
  "valid": true,
  "failures": [],
  "overall_checks": {
    "all_heads_present": true,
    "compact_logical_total_exact": true,
    "padded_half_capacity_exact": true
  },
  "heads": [
    {
      "head": 0,
      "original_rows": 20000003,
      "compact_rows": 10000002,
      "direct_rows": 9934466,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 1,
      "original_rows": 20000023,
      "compact_rows": 10000012,
      "direct_rows": 9934476,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 2,
      "original_rows": 20000033,
      "compact_rows": 10000016,
      "direct_rows": 9934480,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 3,
      "original_rows": 20000047,
      "compact_rows": 10000024,
      "direct_rows": 9934488,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 4,
      "original_rows": 20000059,
      "compact_rows": 10000030,
      "direct_rows": 9934494,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 5,
      "original_rows": 20000063,
      "compact_rows": 10000032,
      "direct_rows": 9934496,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 6,
      "original_rows": 20000069,
      "compact_rows": 10000034,
      "direct_rows": 9934498,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 7,
      "original_rows": 20000077,
      "compact_rows": 10000038,
      "direct_rows": 9934502,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 8,
      "original_rows": 20000081,
      "compact_rows": 10000040,
      "direct_rows": 9934504,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 9,
      "original_rows": 20000093,
      "compact_rows": 10000046,
      "direct_rows": 9934510,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 10,
      "original_rows": 20000107,
      "compact_rows": 10000054,
      "direct_rows": 9934518,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 11,
      "original_rows": 20000147,
      "compact_rows": 10000074,
      "direct_rows": 9934538,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 12,
      "original_rows": 20000153,
      "compact_rows": 10000076,
      "direct_rows": 9934540,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 13,
      "original_rows": 20000159,
      "compact_rows": 10000080,
      "direct_rows": 9934544,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 14,
      "original_rows": 20000161,
      "compact_rows": 10000080,
      "direct_rows": 9934544,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    },
    {
      "head": 15,
      "original_rows": 20000171,
      "compact_rows": 10000086,
      "direct_rows": 9934550,
      "fallback_rows": 65536,
      "checks": {
        "direct_count_exact": true,
        "direct_unique": true,
        "direct_in_range": true,
        "remap_count_exact": true,
        "remap_in_range": true,
        "direct_remap_exact": true,
        "capacity_exact": true,
        "direct_hash_matches": true,
        "remap_hash_matches": true
      }
    }
  ]
}