{
   "strings": {
      "plain": "hello world",
      "empty": "",
      "with spaces": "  leading and trailing  ",
      "with_escapes": "tab\there\nnewline\rcarriage return",
      "with_backslash": "back\\slash",
      "with_quotes": "she said \"hello\"",
      "with_slash": "path/to/file",
      "with_backspace": "back\bspace",
      "with_formfeed": "form\ffeed",
      "all_escapes": "\"\\\b\f\n\r\t\/",
      "unicode_u00xx": "\u0041\u005A\u0061\u007A",
      "unicode_non00": "\u4E16\u754C",
      "unicode_mixed": "Hello \u4E16\u754C!",
      "control_chars": "\u0000\u0001\u001F",
      "long_string": "The quick brown fox jumps over the lazy dog. Pack my box with five dozen liquor jugs.",
      "numeric_as_string": "42",
      "negative_as_string": "-17",
      "float_as_string": "3.14",
      "scientific_as_string": "6.022e23",
      "boolean_like": "true",
      "null_like": "null",
      "only_whitespace": "   ",
      "single_char": "x"
   },

   "numbers": {
      "zero": 0,
      "positive_integer": 42,
      "negative_integer": -17,
      "large_integer": 9999999999,
      "float": 3.14,
      "negative_float": -2.718,
      "scientific_pos": 6.022e23,
      "scientific_neg": -1.602e-19,
      "scientific_upper": 1E10,
      "scientific_pos_exp": 1e+5,
      "zero_point": 0.0,
      "leading_zero_frac": 0.001
   },

   "booleans": {
      "bool_true": true,
      "bool_false": false
   },

   "null_value": null,

   "arrays": {
      "empty": [],
      "single_item": [1],
      "integers": [1, 2, 3, 4, 5],
      "strings": ["alpha", "beta", "gamma"],
      "mixed_types": [1, "two", true, false, null, 3.14],
      "nested": [[1, 2], [3, 4], [5, 6]],
      "deeply_nested": [[[["deep"]]]],
      "of_objects": [
         {"name": "Alice", "age": 30},
         {"name": "Bob", "age": 25}
      ],
      "of_empty_things": [{}, [], "", null],
      "long_array": [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
   },

   "objects": {
      "empty": {},
      "single_key": {"only": "value"},
      "nested": {
         "level1": {
            "level2": {
               "level3": "deep"
            }
         }
      },
      "with_array_values": {
         "fruits": ["apple", "banana", "cherry"],
         "colors": ["red", "green", "blue"]
      },
      "with_mixed_values": {
         "string": "hello",
         "number": 42,
         "float": 3.14,
         "bool_true": true,
         "bool_false": false,
         "null_val": null,
         "array": [1, 2, 3],
         "object": {"nested": true}
      },
      "numeric_keys": {
         "0": "zero",
         "1": "one",
         "42": "forty-two",
         "3.14": "pi"
      },
      "special_char_keys": {
         "key with spaces": "value1",
         "key:colon": "value2",
         "key/slash": "value3",
         "key\"quote": "value4",
         "key\\backslash": "value5",
         "key\ttab": "value6",
         "key\nnewline": "value7",
         "": "empty key"
      }
   },

   "complex_nesting": {
      "users": [
         {
            "name": "admin",
            "roles": ["read", "write", "delete"],
            "settings": {
               "theme": "dark",
               "verbose": true,
               "limits": {
                  "max_files": 1000,
                  "max_size": 10485760
               }
            }
         },
         {
            "name": "guest",
            "roles": ["read"],
            "settings": {
               "theme": "light",
               "verbose": false,
               "limits": {
                  "max_files": 10,
                  "max_size": 1048576
               }
            }
         }
      ],
      "metadata": {
         "version": "2.0",
         "generated": "2026-03-30",
         "tags": ["test", "comprehensive", "json"]
      }
   },

   "whitespace_variations": {
      "compact": {"a":1,"b":2},
      "normal": {"a": 1, "b": 2}
   },

   "duplicate_keys_last_wins": {
      "key": "first",
      "key": "second"
   },

   "top_level_note": "This file exercises all JSON value types, nesting patterns, escape sequences, and edge cases as defined by RFC 8259."
}