review.md
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Review evidence and scope
Reviewed 2026-10-01 against Zarr-Python 3.4.0 (2026-09-15). Official PyPI release metadata and version-tagged source were checked; 15 Zarr runtime source files matched the installed wheel byte for byte. Six additional backend/integration files (s3fs, gcsfs including credentials, fsspec HTTP, Xarray and Dask) also matched their released source. Rolling documentation is interpreted through that release's source and native behavior.
The repository tests execute every local Python example and the migration CLI example, plus independent checks of codecs, local/ZIP/memory/obstore/fsspec adapters, indexing, rectilinear gating, shard writes, dtype/NaN/zero preservation, Xarray/Dask/HDF5 conversion, metadata-only migration, stale consolidation, missing chunks and read-only failures. Small synthetic fixtures test mechanics, not throughput, calibration or scientific validity.
Remote S3/GCS/HTTP examples are illustrative. Provider constructor options and backend request/pagination code were reviewed; memory-protocol and loopback HTTP tests exercise adapters without external credentials. No authenticated cloud requests, remote writes, public bucket datasets, distributed scheduler, GPU, lossy codec, general HDF5 hierarchy conversion or NetCDF engine roundtrip is claimed.
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