{
  "schemaVersion": 1,
  "scope": "Published native evidence families. Private parser corpora and purely illustrative UI state are not catalogued here. Hashes identify bytes; format semantics remain with each family verifier.",
  "reproduction": "Repository commands require the project checkout and its documented runtime. Public recipe downloads may also require companion files from their family and source families.",
  "families": [
    {
      "id": "parquet-layouts",
      "topic": "parquet",
      "title": "Eight physical layouts",
      "guide": "/parquet/layouts",
      "scope": "Identical synthetic records across sorting, group/page size, encoding, codec and index variants.",
      "boundary": "Browser counters measure application reads; they are not disk or general CPU benchmarks.",
      "sourceFamilies": [],
      "versions": [
        {
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          "value": "PyArrow 25.0.1",
          "source": "/parquet-layouts/manifest.json"
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    {
      "id": "parquet-bloom",
      "topic": "parquet",
      "title": "Native Bloom filters",
      "guide": "/parquet/explained#bloom-filters",
      "scope": "Original split-block filters, independent XXH64/probe values and exact native query answers.",
      "boundary": "A possible match still needs residual decoding. Typed logical extensions are outside the probe adapter.",
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          "source": "/parquet-bloom/proof.json"
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      "recipes": [
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          "url": "/parquet-bloom/reproduce.py",
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          "dependencies": [
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            "xxhash==3.5.0"
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      "title": "Arrow file, stream and buffers",
      "guide": "/arrow/explained#evidence",
      "scope": "Native file/stream batches, nested offsets, dictionary values, exact primitives and matching Parquet.",
      "boundary": "The bounded inspector uses Arrow JS 17.0.0; unsupported extension semantics remain explicit.",
      "sourceFamilies": [],
      "versions": [
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    {
      "id": "iceberg-weather",
      "topic": "iceberg",
      "title": "Weather table history",
      "guide": "/iceberg/explained#references",
      "scope": "Original metadata, manifests and files for appends, deletion and field rename.",
      "boundary": "This curated reader is not a general table or catalog client.",
      "sourceFamilies": [],
      "versions": [
        {
          "label": "writer",
          "value": "PyIceberg 0.10.0 / PyArrow 25.0.0",
          "source": "/iceberg/weather/index.json"
        },
        {
          "label": "oracle",
          "value": "DuckDB 1.4.4 + iceberg extension",
          "source": "/iceberg/weather/index.json"
        },
        {
          "label": "oracleExtension",
          "value": "1095c1fa",
          "source": "/iceberg/weather/index.json"
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      ],
      "recipes": [
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          "sha256": "d4b2a356f2f6ed88cb378f821de179bee1de8a20e0a6017b55184c6636beea0b",
          "dependencies": [
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            "duckdb==1.4.4",
            "fastavro==1.12.1"
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        {
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          "sha256": "533300856fef12a832d42f48780069e3c5fb4e2c821f99d9f51ae1e3de72a3a0",
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      "boundary": "Native reader limitations are retained; opening an original Parquet file does not apply table deletes.",
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