cachekit-core 0.7.3

{
  "checksum": "xxHash3-64, 8 bytes big-endian, computed on uncompressed input",
  "compression": "LZ4 block format (NOT frame)",
  "constructed_vectors": [
    {
      "name": "envelope_ratio_product_wraps_32_bits",
      "description": "canonical bin envelope whose compressed_data is 4294968 B = ceil(2^32/1000), the first size at which 1000 * compressed_size overflows unsigned 32 bits. original_size is larger than compressed_size and well inside the 1000:1 bound, so readers MUST accept it and return the constructed input. A reader that computes the product in 32-bit width gets 704 instead (signed or unsigned wrap alike) and rejects it as a ratio bomb; so does one that rejects on 32-bit overflow, and a 32-bit one that skips the product when original_size <= compressed_size. A pointer-width product passes it on a 64-bit host, so a pass there proves nothing about a 32-bit target. spec/wire-format.md#decompression-bomb-detection says which implementations must run it and on which targets.",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 8523079,
      "compressed_size": 4294968,
      "envelope_size": 4295001,
      "checksum_hex": "6d8571f174e2b890",
      "envelope_construction": [
        {
          "hex": "94c600418938ff",
          "count": 1
        },
        {
          "hex": "ff",
          "count": 16711
        },
        {
          "hex": "d7c600820d42",
          "count": 1
        },
        {
          "hex": "00",
          "count": 4261530
        },
        {
          "hex": "0100",
          "count": 1
        },
        {
          "hex": "ff",
          "count": 16711
        },
        {
          "hex": "d7500000000000986dcc8571ccf174cce2ccb8cc90ce00820d47a76d73677061636b",
          "count": 1
        }
      ],
      "input_construction": [
        {
          "hex": "c600820d42",
          "count": 1
        },
        {
          "hex": "00",
          "count": 8523074
        }
      ]
    },
    {
      "name": "envelope_bin16_max",
      "description": "canonical bin envelope whose compressed_data is 65535 B, the longest a bin16 holds, so the shortest-form marker is 0xc5 with length ffff. Readers MUST accept it and return the constructed input. A writer whose bin16 limit sits below 65535 B encodes these fields as bin32. The block is not compressor output, so a writer test feeds the fields to its envelope encoder.",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 130041,
      "compressed_size": 65535,
      "envelope_size": 65564,
      "checksum_hex": "d2299563ec283c68",
      "envelope_construction": [
        {
          "hex": "94c5ffffff",
          "count": 1
        },
        {
          "hex": "ff",
          "count": 254
        },
        {
          "hex": "e7c60001fbf4",
          "count": 1
        },
        {
          "hex": "00",
          "count": 65011
        },
        {
          "hex": "0100",
          "count": 1
        },
        {
          "hex": "ff",
          "count": 254
        },
        {
          "hex": "e750000000000098ccd229cc9563ccec283c68ce0001fbf9a76d73677061636b",
          "count": 1
        }
      ],
      "input_construction": [
        {
          "hex": "c60001fbf4",
          "count": 1
        },
        {
          "hex": "00",
          "count": 130036
        }
      ]
    },
    {
      "name": "envelope_bin32_min",
      "description": "canonical bin envelope whose compressed_data is 65536 B, one past the bin16 maximum, so the shortest-form marker is 0xc6 with length 00010000. Readers MUST accept it and return the constructed input. It is the only bin32 envelope in the file below the multi-megabyte envelope_ratio_product_wraps_32_bits. The block is not compressor output, so a writer test feeds the fields to its envelope encoder.",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 130043,
      "compressed_size": 65536,
      "envelope_size": 65570,
      "checksum_hex": "2080f6efc1bcee59",
      "envelope_construction": [
        {
          "hex": "94c600010000ff",
          "count": 1
        },
        {
          "hex": "ff",
          "count": 254
        },
        {
          "hex": "e8c60001fbf6",
          "count": 1
        },
        {
          "hex": "00",
          "count": 65012
        },
        {
          "hex": "0100",
          "count": 1
        },
        {
          "hex": "ff",
          "count": 254
        },
        {
          "hex": "e85000000000009820cc80ccf6ccefccc1ccbcccee59ce0001fbfba76d73677061636b",
          "count": 1
        }
      ],
      "input_construction": [
        {
          "hex": "c60001fbf6",
          "count": 1
        },
        {
          "hex": "00",
          "count": 130038
        }
      ]
    },
    {
      "name": "envelope_legacy_array32_min",
      "description": "the fields of envelope_bin32_min in the legacy encoding: compressed_data is an array32 (0xdd) of 65536 integers, each byte its shortest msgpack uint. Readers MUST accept it and return the constructed input; no legacy vector in the vectors group exceeds 65,535 elements.",
      "format": "msgpack",
      "envelope_encoding": "int-array",
      "original_size": 130043,
      "compressed_size": 65536,
      "envelope_size": 66084,
      "checksum_hex": "2080f6efc1bcee59",
      "envelope_construction": [
        {
          "hex": "94dd00010000ccff",
          "count": 1
        },
        {
          "hex": "ccff",
          "count": 254
        },
        {
          "hex": "cce8ccc60001ccfbccf6",
          "count": 1
        },
        {
          "hex": "00",
          "count": 65012
        },
        {
          "hex": "0100",
          "count": 1
        },
        {
          "hex": "ccff",
          "count": 254
        },
        {
          "hex": "cce85000000000009820cc80ccf6ccefccc1ccbcccee59ce0001fbfba76d73677061636b",
          "count": 1
        }
      ],
      "input_construction": [
        {
          "hex": "c60001fbf6",
          "count": 1
        },
        {
          "hex": "00",
          "count": 130038
        }
      ]
    }
  ],
  "construction_note": "constructed_vectors are too large to pin as hex. To build envelope or input bytes, repeat each segment's hex `count` times and concatenate the segments in order (the same list form as interop-v2.json). Readers MUST decode the constructed envelope to the constructed input.",
  "envelope_format": "MessagePack positional array (rmp_serde::to_vec): [compressed_data, checksum, original_size, format]. Vectors without an 'envelope_encoding' field use the legacy array-of-integers encoding for compressed_data and are retained forever as legacy-read proof; their '*_bin' twins use msgpack bin (canonical for protocol 1.1+ writers). checksum always encodes as an array of 8 integers. Normative rules: spec/wire-format.md, 'Byte Layout' / 'Encoding compatibility'.",
  "generator": "six original legacy vectors: cachekit-core v0.2.0; width_boundary_bin16 legacy vector: cachekit-core v0.5.0 real writer; width_boundary_bin8_max and width_boundary_bin16_min legacy vectors: legacy re-encode of the fields cachekit 0.22.0 (cachekit-core lz4_flex, identical to liblz4 1.9.4 here) writes for the first 253 and 254 bytes of width_boundary_bin16's input; *_bin vectors: tools/wire-format-reference.py generate - deterministic re-encode of the legacy fields, byte-verified against rmp-serde 1.3.1 + serde_bytes 0.11.19 output; constructed_vectors: tools/wire-format-reference.py generate - stdlib construction, checksum by xxhash 4.0.1 (xxHash 0.8.3); reject_vectors: tools/wire-format-reference.py generate - re-encode of legacy base fields with one check broken; payload_reject_vectors and temporal_sentinel_vectors: tools/wire-format-reference.py generate",
  "limits": {
    "max_compressed_size": 536870912,
    "max_compression_ratio": 1000,
    "max_uncompressed_size": 536870912
  },
  "payload_reject_vectors": [
    {
      "name": "payload_array32_max_claim_alone",
      "description": "canonical bin envelope that every Retrieve Flow check accepts, whose payload is decode-bounds.json's array32_max_claim_alone (5 B, reject reasons: overclaim). The SDK's decode of that payload MUST reject it before materialising it; an SDK test drives the envelope through its read path and asserts its pre-scan's own error (spec/interop-mode.md#decode-bounds). A reader that pre-scans the envelope's bytes but decodes the payload unguarded passes every reject vector and fails this. compressed_data is a literals-only block.",
      "derived_from": "decode-bounds.json:array32_max_claim_alone",
      "reject_reasons": [
        "overclaim"
      ],
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 5,
      "compressed_size": 6,
      "checksum_hex": "be8c1ab2459a5c4d",
      "envelope_hex": "94c40650ddffffffff98ccbecc8c1accb245cc9a5c4d05a76d73677061636b",
      "envelope_size": 31,
      "input_hex": "ddffffffff"
    },
    {
      "name": "payload_nested_array16_each_header_fits_sum_overclaims",
      "description": "canonical bin envelope that every Retrieve Flow check accepts, whose payload is decode-bounds.json's nested_array16_each_header_fits_sum_overclaims (2090 B, reject reasons: overclaim). The SDK's decode of that payload MUST reject it before materialising it; an SDK test drives the envelope through its read path and asserts its pre-scan's own error (spec/interop-mode.md#decode-bounds). A reader that pre-scans the envelope's bytes but decodes the payload unguarded passes every reject vector and fails this. compressed_data is a literals-only block.",
      "derived_from": "decode-bounds.json:nested_array16_each_header_fits_sum_overclaims",
      "reject_reasons": [
        "overclaim"
      ],
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 2090,
      "compressed_size": 2100,
      "checksum_hex": "3ed3acb89f2fbb89",
      "envelope_hex": "94c50834f0ffffffffffffffff23dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0983eccd3ccacccb8cc9f2fccbbcc89cd082aa76d73677061636b",
      "envelope_size": 2130,
      "input_hex": "dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0dc07d0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0"
    }
  ],
  "reject_vectors": [
    {
      "name": "reject_original_size_over_cap",
      "description": "original_size 536870913 B, one byte over the 512 MiB max_uncompressed_size, with a 1000 B compressed_data that is not a valid LZ4 block (a literal-length extension that never ends). Readers MUST reject it. An SDK test asserts the size-cap error, and that the read's allocation high-water stayed below original_size (spec/wire-format.md#reject-vectors). The reference reader rejects it at Retrieve Flow step 4. A reader without step 4 rejects it at step 5, by the ratio bound. One that decompresses first with a strict decoder and lets its error propagate never raises the size-cap error, and one that allocates an output sized from original_size first fails the allocation bound.",
      "reject_step": 4,
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 536870913,
      "compressed_size": 1000,
      "envelope_hex": "94c503e8f0ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff986dcc8a34ccb63a3c52ccd3ce20000001a76d73677061636b",
      "envelope_size": 1029
    },
    {
      "name": "reject_original_size_wraps_u32",
      "description": "simple_string's compressed_data and checksum with original_size 2^32 + 16 = 4294967312 B, encoded as msgpack uint64. Readers MUST reject it before decompression. An SDK test asserts the size-cap error, or a Retrieve Flow step-2 error from a range-checked decode into a narrower type; never a length or checksum error. The reference reader rejects it at step 4. A reader that truncates original_size to its low 32 bits reads 16 and accepts it; one that joins the two 32-bit halves reads 17 and rejects it only with a length error.",
      "reject_step": 4,
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 4294967312,
      "compressed_size": 18,
      "envelope_hex": "94c412f00168656c6c6f2c2063616368656b697421986dcc8a34ccb63a3c52ccd3cf0000000100000010a76d73677061636b",
      "envelope_size": 50
    },
    {
      "name": "reject_zero_length_compressed_data",
      "description": "empty compressed_data with original_size 0 and the checksum of the empty input. Readers MUST reject it. An SDK test asserts the zero-length error; the ratio bound cannot raise it, because 0 <= 1000 * 0. The reference reader rejects it at Retrieve Flow step 5. A reader without the zero-length check hands an empty block to its LZ4 decoder, which rejects it at step 6 if it refuses an empty block, as liblz4 does, and accepts it if it decodes one to empty output.",
      "reject_step": 5,
      "derived_from": "empty",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 0,
      "compressed_size": 0,
      "envelope_hex": "94c400982d06cc800538ccd3cc94ccc200a76d73677061636b",
      "envelope_size": 25
    },
    {
      "name": "reject_ratio_bomb",
      "description": "original_size 1000001 B = 1000 * 1000 + 1, one byte past the 1000:1 bound, with a 1000 B compressed_data that is not a valid LZ4 block. Readers MUST reject it. An SDK test asserts the ratio error, and that the read's allocation high-water stayed below original_size (spec/wire-format.md#reject-vectors). The reference reader rejects it at Retrieve Flow step 5. A reader without the ratio check, or one that decompresses first with a strict decoder and lets its error propagate, never raises the ratio error, and one that allocates an output sized from original_size first fails the allocation bound.",
      "reject_step": 5,
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 1000001,
      "compressed_size": 1000,
      "envelope_hex": "94c503e8f0ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff986dcc8a34ccb63a3c52ccd3ce000f4241a76d73677061636b",
      "envelope_size": 1029
    },
    {
      "name": "reject_decompressed_length_mismatch",
      "description": "simple_string's compressed_data and checksum with original_size 17 B, one more than the 16 B the block decodes to, and inside every size and ratio bound. Readers MUST reject it. An SDK test asserts a length error, at Retrieve Flow step 6 or step 9, and not a checksum error. The reference reader's decoder (tools/wire-format-reference.py) rejects any output length other than original_size, at step 6. A reader whose decoder returns a shorter output without error, as liblz4 does, rejects it at step 9; both conform. A reader with neither check accepts it, because the checksum matches the decoded bytes. A reader that zero-pads the output to original_size fails the checksum, or accepts it if it checksums before padding; neither is a length error.",
      "reject_step": 6,
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 17,
      "compressed_size": 18,
      "envelope_hex": "94c412f00168656c6c6f2c2063616368656b697421986dcc8a34ccb63a3c52ccd311a76d73677061636b",
      "envelope_size": 42
    },
    {
      "name": "reject_checksum_mismatch",
      "description": "simple_string's envelope with the first and last checksum bytes flipped (xor 0x01). Readers MUST reject it; an SDK test asserts the rejection. The reference reader rejects it at Retrieve Flow step 8. A reader without step 8 accepts it.",
      "reject_step": 8,
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 16,
      "compressed_size": 18,
      "envelope_hex": "94c412f00168656c6c6f2c2063616368656b697421986ccc8a34ccb63a3c52ccd210a76d73677061636b",
      "envelope_size": 42
    },
    {
      "name": "reject_envelope_arity_5",
      "description": "simple_string_bin's four fields followed by a fifth element, nil, in a fixarray(5). Readers MUST reject it at Retrieve Flow step 2's typed decode. An SDK test asserts that typed-decode error. A reader that takes the first four elements of whatever array it decodes accepts it and returns simple_string's input, because every field and the checksum are intact.",
      "reject_step": 2,
      "reject_check": "typed_decode",
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 16,
      "compressed_size": 18,
      "envelope_hex": "95c412f00168656c6c6f2c2063616368656b697421986dcc8a34ccb63a3c52ccd310a76d73677061636bc0",
      "envelope_size": 43
    },
    {
      "name": "reject_envelope_arity_3",
      "description": "simple_string_bin without its fourth element, format, in a fixarray(3). Readers MUST reject it at Retrieve Flow step 2's typed decode. An SDK test asserts that typed-decode error. A reader that defaults a missing format to \"msgpack\" accepts it and returns simple_string's input.",
      "reject_step": 2,
      "reject_check": "typed_decode",
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 16,
      "compressed_size": 18,
      "envelope_hex": "93c412f00168656c6c6f2c2063616368656b697421986dcc8a34ccb63a3c52ccd310",
      "envelope_size": 34
    },
    {
      "name": "reject_checksum_nine_elements",
      "description": "simple_string_bin with a ninth integer, 0, appended to the checksum array. Readers MUST reject it at Retrieve Flow step 2's typed decode: checksum is exactly 8 integers. An SDK test asserts that typed-decode error. A reader that compares the first 8 checksum bytes accepts it, because they are the true checksum.",
      "reject_step": 2,
      "reject_check": "typed_decode",
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 16,
      "compressed_size": 18,
      "envelope_hex": "94c412f00168656c6c6f2c2063616368656b697421996dcc8a34ccb63a3c52ccd30010a76d73677061636b",
      "envelope_size": 43
    },
    {
      "name": "reject_checksum_seven_elements",
      "description": "simple_string_bin with the checksum array cut to its first 7 integers. Readers MUST reject it at Retrieve Flow step 2's typed decode: checksum is exactly 8 integers. An SDK test asserts that typed-decode error. A reader that compares each checksum element it was given with the digest accepts it, because those 7 match.",
      "reject_step": 2,
      "reject_check": "typed_decode",
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 16,
      "compressed_size": 18,
      "envelope_hex": "94c412f00168656c6c6f2c2063616368656b697421976dcc8a34ccb63a3c5210a76d73677061636b",
      "envelope_size": 40
    },
    {
      "name": "reject_legacy_element_above_255",
      "description": "simple_string's legacy envelope with compressed_data element 2 written as uint16 360 (cd 0168) instead of 104. Readers MUST reject it at Retrieve Flow step 2's typed decode: each element is a byte. An SDK test asserts that typed-decode error. A reader that keeps an element's low 8 bits (JavaScript's Uint8Array.from) reads 104 and accepts it, because the block and checksum then match simple_string's input.",
      "reject_step": 2,
      "reject_check": "typed_decode",
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "int-array",
      "original_size": 16,
      "compressed_size": 18,
      "envelope_hex": "94dc0012ccf001cd0168656c6c6f2c2063616368656b697421986dcc8a34ccb63a3c52ccd310a76d73677061636b",
      "envelope_size": 46
    },
    {
      "name": "reject_envelope_slots_overclaim",
      "description": "simple_string_bin with compressed_data's bin8 length raised from 18 to 38, all but the last byte after its header. Each header fits the input that follows it, but the declared slots, summed over the document, are 42, one past the input length minus one (41), so a budget of the whole input length passes it too. Readers MUST reject it at Retrieve Flow step 2's pre-scan, before anything is materialised. An SDK test asserts the pre-scan's own error (spec/interop-mode.md#decode-bounds). Every decoder also rejects it: a generic one as truncated, a typed one as a wrong type at element 1, where byte 0x6b sits in place of the checksum array. So only that assertion catches a reader without the pre-scan, or with per-header checks only.",
      "reject_step": 2,
      "reject_check": "decode_bounds",
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 16,
      "compressed_size": 38,
      "envelope_hex": "94c426f00168656c6c6f2c2063616368656b697421986dcc8a34ccb63a3c52ccd310a76d73677061636b",
      "envelope_size": 42
    },
    {
      "name": "reject_original_size_sign_bit",
      "description": "simple_string's compressed_data and checksum with original_size 2^63 + 16 = 9223372036854775824 B, encoded as msgpack uint64. Readers MUST reject it before decompression. An SDK test asserts the size-cap error, or a Retrieve Flow step-2 error from a range-checked decode into a narrower type; never a length, allocation or checksum error. The reference reader rejects it at step 4. A reader that reinterprets the uint64 as a signed i64 reads -9223372036854775792, which passes the size cap and the ratio bound, and fails later or crashes. One that truncates to 32 bits reads 16 and accepts it.",
      "reject_step": 4,
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 9223372036854775824,
      "compressed_size": 18,
      "envelope_hex": "94c412f00168656c6c6f2c2063616368656b697421986dcc8a34ccb63a3c52ccd3cf8000000000000010a76d73677061636b",
      "envelope_size": 50
    },
    {
      "name": "reject_ratio_float32_rounds",
      "description": "original_size 32768001 B = 1000 * 32768 + 1, one byte past the 1000:1 bound, with a 32768 B compressed_data that is not a valid LZ4 block. Readers MUST reject it. An SDK test asserts the ratio error. The reference reader rejects it at Retrieve Flow step 5. A ratio taken in float32 reads exactly 1000 here, whether both operands are rounded (32768001 becomes 32768000) or only the quotient, so it never raises the ratio error; neither does a truncating division. reject_ratio_bomb, at 1000.001, catches the division but neither float32 ratio.",
      "reject_step": 5,
      "derived_from": "simple_string",
      "format": "msgpack",
      "envelope_encoding": "bin",
      "original_size": 32768001,
      "compressed_size": 32768,
      "envelope_hex": 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      "envelope_size": 32797
    }
  ],
  "temporal_sentinel_vectors": [
    {
      "name": "temporal_sentinel_datetime",
      "description": "the MessagePack map {\"__datetime__\": true, \"value\": \"2025-11-14T10:30:00+00:00\"}, as an auto-mode payload. An SDK's deserialization MUST revive it as its temporal type for a datetime, equal to 2025-11-14T10:30:00+00:00, not return the map. interop-mode.json's datetime_sentinel_value pins the same map's bytes; revival in interop mode follows spec/interop-mode.md.",
      "payload_hex": "82ac5f5f6461746574696d655f5fc3a576616c7565b9323032352d31312d31345431303a33303a30302b30303a3030",
      "revives_to": {
        "type": "datetime",
        "iso": "2025-11-14T10:30:00+00:00"
      }
    },
    {
      "name": "temporal_sentinel_date",
      "description": "the MessagePack map {\"__date__\": true, \"value\": \"2025-11-14\"}, as an auto-mode payload. An SDK's deserialization MUST revive it as its temporal type for a date, equal to 2025-11-14, not return the map. interop-mode.json's datetime_sentinel_value pins the same map's bytes; revival in interop mode follows spec/interop-mode.md.",
      "payload_hex": "82a85f5f646174655f5fc3a576616c7565aa323032352d31312d3134",
      "revives_to": {
        "type": "date",
        "iso": "2025-11-14"
      }
    },
    {
      "name": "temporal_sentinel_time",
      "description": "the MessagePack map {\"__time__\": true, \"value\": \"10:30:00\"}, as an auto-mode payload. An SDK's deserialization MUST revive it as its temporal type for a time, equal to 10:30:00, not return the map. interop-mode.json's datetime_sentinel_value pins the same map's bytes; revival in interop mode follows spec/interop-mode.md.",
      "payload_hex": "82a85f5f74696d655f5fc3a576616c7565a831303a33303a3030",
      "revives_to": {
        "type": "time",
        "iso": "10:30:00"
      }
    }
  ],
  "vectors": [
    {
      "description": "Zero-length payload",
      "envelope_hex": "949100982d06cc800538ccd3cc94ccc200a76d73677061636b",
      "envelope_size": 25,
      "format": "msgpack",
      "input_hex": "",
      "input_size": 0,
      "name": "empty"
    },
    {
      "description": "Short ASCII text",
      "envelope_hex": "94dc0012ccf00168656c6c6f2c2063616368656b697421986dcc8a34ccb63a3c52ccd310a76d73677061636b",
      "envelope_size": 44,
      "format": "msgpack",
      "input_hex": "68656c6c6f2c2063616368656b697421",
      "input_size": 16,
      "name": "simple_string"
    },
    {
      "description": "64 bytes derived from pi (deterministic, low compressibility)",
      "envelope_hex": "94dc0042ccf031243f6acc88cc85cca308ccd31319cc8a2e03707344cca409382229cc9f31ccd0082eccfacc98ccec4e6ccc89452821cce638ccd01377ccbe5466cccf34cce90c6cccc0ccac29ccb7ccc97c50ccdd3fcc84ccd5ccb5ccb5470917982d016e0411ccedcc9e3440a76d73677061636b",
      "envelope_size": 117,
      "format": "msgpack",
      "input_hex": "243f6a8885a308d313198a2e03707344a4093822299f31d0082efa98ec4e6c89452821e638d01377be5466cf34e90c6cc0ac29b7c97c50dd3f84d5b5b5470917",
      "input_size": 64,
      "name": "binary_data"
    },
    {
      "description": "1024 bytes of repeated 'A' (high compression ratio)",
      "envelope_hex": "949f1f410100ccffccffccffcce960414141414141984d35ccad08cce9ccd77c0dcd0400a76d73677061636b",
      "envelope_size": 44,
      "format": "msgpack",
      "input_hex": "41414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141414141",
      "input_size": 1024,
      "name": "large_compressible"
    },
    {
      "description": "JSON-like payload (common real-world pattern)",
      "envelope_hex": "94dc004cccf03b7b22757365725f6964223a31323334352c226e616d65223a22416c696365222c22656d61696c223a22616c696365406578616d706c652e636f6d222c22616374697665223a747275657d98cc87673661cc9c4bcca8204aa76d73677061636b",
      "envelope_size": 102,
      "format": "msgpack",
      "input_hex": "7b22757365725f6964223a31323334352c226e616d65223a22416c696365222c22656d61696c223a22616c696365406578616d706c652e636f6d222c22616374697665223a747275657d",
      "input_size": 74,
      "name": "json_like"
    },
    {
      "description": "Single byte 0xFF (minimum non-empty payload)",
      "envelope_hex": "949210ccff98ccd6ccbcccec3c6b29ccd72e01a76d73677061636b",
      "envelope_size": 27,
      "format": "msgpack",
      "input_hex": "ff",
      "input_size": 1,
      "name": "single_byte"
    },
    {
      "description": "300-byte deterministic xorshift64* incompressible payload (seed 0x9e3779b97f4a7c15, multiplier 0x2545f4914f6cdd1d; little-endian u64 output truncated to 300 bytes; real writer bin16 width boundary)",
      "envelope_hex": "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",
      "envelope_size": 478,
      "format": "msgpack",
      "input_hex": "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",
      "input_size": 300,
      "name": "width_boundary_bin16"
    },
    {
      "description": "The first 253 bytes of width_boundary_bin16's input, which compress to a literals-only block of 255 B, the bin8 maximum: 255 B, marker 0xc4 ff in the bin twin (real writer, cachekit 0.22.0 / cachekit-core lz4_flex)",
      "envelope_hex": "94dc00ffccf0cceecc9925cc9acc8ccca2ccd103745ecccbcc8eccab39ccf370ccdd1ecca10e523348cc977d244dcc80cca41841cc8f54ccbc38cc97142004ccd6ccfbccb5ccf12e5acc91cc9c5528733454ccc2ccc652cce2ccfbcc82cccccce2ccebccff51ccd6ccadccbfcca8cc8d011a0627cca416cc9fcca54a5ecc9a66ccdf61cc82cce87571ccbd25ccf7571a68cc8e1221ccd257cca97230cc906acca41ccca1cce6ccf76dcca7cce1ccfc0ecc9ecc83cc96324bcc8720ccef20cce3ccd6ccd77a713bcc951eccd8ccfa38ccfc6bccf8ccf6ccca4177102dcca9211f26ccf3ccba2c20cca2ccf0ccd1ccaaccd5095b302838192b5922226acca7027c3c13cce03268cc90ccd1ccaaccecccf2ccce1c442445cc916a26cc8c72cce4cced381a3b69cc9accc8ccb0cca9cc935614ccd4ccdccc83ccd6ccde44ccb1462747ccf7ccf8711fcc9a27234fcca6cc9c3c5f5ccc8319ccc6ccb239cc9d2dccde6a290831cc86cca46b3accb03b1ecca8ccdbccb4cc98ccdecce5ccc1cc97ccbe39ccfd982ccca9cc81cc972818cc8f25ccfda76d73677061636b",
      "envelope_size": 410,
      "format": "msgpack",
      "input_hex": "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",
      "input_size": 253,
      "name": "width_boundary_bin8_max"
    },
    {
      "description": "The first 254 bytes of width_boundary_bin16's input, which compress to a literals-only block of 256 B, the bin16 minimum: 256 B, marker 0xc5 0100 in the bin twin (real writer, cachekit 0.22.0 / cachekit-core lz4_flex)",
      "envelope_hex": "94dc0100ccf0ccefcc9925cc9acc8ccca2ccd103745ecccbcc8eccab39ccf370ccdd1ecca10e523348cc977d244dcc80cca41841cc8f54ccbc38cc97142004ccd6ccfbccb5ccf12e5acc91cc9c5528733454ccc2ccc652cce2ccfbcc82cccccce2ccebccff51ccd6ccadccbfcca8cc8d011a0627cca416cc9fcca54a5ecc9a66ccdf61cc82cce87571ccbd25ccf7571a68cc8e1221ccd257cca97230cc906acca41ccca1cce6ccf76dcca7cce1ccfc0ecc9ecc83cc96324bcc8720ccef20cce3ccd6ccd77a713bcc951eccd8ccfa38ccfc6bccf8ccf6ccca4177102dcca9211f26ccf3ccba2c20cca2ccf0ccd1ccaaccd5095b302838192b5922226acca7027c3c13cce03268cc90ccd1ccaaccecccf2ccce1c442445cc916a26cc8c72cce4cced381a3b69cc9accc8ccb0cca9cc935614ccd4ccdccc83ccd6ccde44ccb1462747ccf7ccf8711fcc9a27234fcca6cc9c3c5f5ccc8319ccc6ccb239cc9d2dccde6a290831cc86cca46b3accb03b1ecca8ccdbccb4cc98ccdecce5ccc1cc97ccbe39ccfdccb898cca8cc96ccfb54ccb8ccc21a31ccfea76d73677061636b",
      "envelope_size": 413,
      "format": "msgpack",
      "input_hex": "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",
      "input_size": 254,
      "name": "width_boundary_bin16_min"
    },
    {
      "description": "bin-encoded twin of 'empty': identical fields, compressed_data as msgpack bin (canonical writer encoding, protocol 1.1+)",
      "envelope_hex": "94c40100982d06cc800538ccd3cc94ccc200a76d73677061636b",
      "envelope_size": 26,
      "format": "msgpack",
      "input_hex": "",
      "input_size": 0,
      "name": "empty_bin",
      "envelope_encoding": "bin",
      "derived_from": "empty"
    },
    {
      "description": "bin-encoded twin of 'simple_string': identical fields, compressed_data as msgpack bin (canonical writer encoding, protocol 1.1+)",
      "envelope_hex": "94c412f00168656c6c6f2c2063616368656b697421986dcc8a34ccb63a3c52ccd310a76d73677061636b",
      "envelope_size": 42,
      "format": "msgpack",
      "input_hex": "68656c6c6f2c2063616368656b697421",
      "input_size": 16,
      "name": "simple_string_bin",
      "envelope_encoding": "bin",
      "derived_from": "simple_string"
    },
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}