Rugo Parquet Inspector

A VS Code extension for inspecting Parquet files below the "just show me a data grid" level — schema, row-group and column-chunk layout, encoding, compression, statistics, dictionary/bloom-filter presence, and common anti-patterns (uncompacted row groups, missing dictionary/bloom coverage, encodings that vary across row groups).

Parquet reading is powered by Rugo, opteryx-core's Parquet/file engine. The core is not reimplemented here: it's a pinned, vendored copy of Rugo's Python-free C++ metadata reader (rugo/src/parquet), compiled to WASM with no Cython/nanobind/libpython involved. See native/README.md.

Status

Real metadata reads (schema, row groups, column-chunk stats, bloom-filter presence) working end to end against real files.

Development

npm install
npm run build:native   # requires emcc (brew install emscripten)
npm run watch           # esbuild watch mode

Then launch the "Run Extension" debug target in VS Code (F5).

License

Apache-2.0. Includes vendored Apache-2.0 code from opteryx-core/Rugo — see native/README.md for provenance.