What's Changed Allow s3 testing in face of ambient AWS credentials by @chuckwondo in https://github.com/zarr-developers/zarr-python/pull/3947 ci: run all of xarray's tests in downstream workflow by @maxrjones in https://github.com/zarr-developers/zarr-python/pull/3940 chore(deps): bump the actions group across 1 directory with 12 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/3930 chore: update pre-commit hooks by @pre-commit-ci[bot] in https://github.com/zarr-developers/zarr-python/pull/3943 chore(zarr-metadata): bump version to 0.1.1 by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3949 refactor: simplify internal chunk representation by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3899 Fix V3 time types by @chuckwondo in https://github.com/zarr-developers/zarr-python/pull/3955 chore: fix ability to run mypy via hatch by @chuckwondo in https://github.com/zarr-developers/zarr-python/pull/3952 Fix minor typos by @kabilar in https://github.com/zarr-developers/zarr-python/pull/3957 chore(deps): bump the actions group with 5 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/3951 deprecate blosc enums by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3963 BUG: Fix empty Group nodes lacking a "consolidated_metadata" field by @TomAugspurger in https://github.com/zarr-developers/zarr-python/pull/3967 fix(zarr-metadata): model stored metadata more closely by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3962 fix: allow writing to 0-dimensional arrays with sharding by @NIK-TIGER-BILL in https://github.com/zarr-developers/zarr-python/pull/3966 chore(deps): bump the actions group with 2 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/3970 chore: run mypy from developer environment by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3972 feat:get_ranges by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3925 chore: remove warning on fixed length utf32 by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3979 misc(zarr-metadata): typed constants and fixes by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3978 chore: cd workflow by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3935 perf: cache default ArraySpec for regular chunk grids by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3908 refactor(sharding): store chunks_per_shard explicitly in _ShardIndex by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3975 docs: update link to developer chat by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3980 feat(zarr-metadata): partial metadata types by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3982 chore(zarr-metadata): set up a changelog by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3981 Optimize partial shard reads by @aldenks in https://github.com/zarr-developers/zarr-python/pull/3004 Do not install CuPy on darwin by @chuckwondo in https://github.com/zarr-developers/zarr-python/pull/3988 chore(zarr-metadata): prepare for 0.2.0 release by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3986 Widen ChunksLike type alias by @chuckwondo in https://github.com/zarr-developers/zarr-python/pull/3990 fix: match v* when extracting a zarr version from git tags by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3994 feat: subchunk write order by @ilan-gold in https://github.com/zarr-developers/zarr-python/pull/3826 prune old string dtype class by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3973 fix: compare metadata objects by JSON form by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3999 Run doctests via pytest and fix broken doctests. by @chuckwondo in https://github.com/zarr-developers/zarr-python/pull/4000 fix(FsspecStore): close owned async filesystem on store.close() by @josh-ag2 in https://github.com/zarr-developers/zarr-python/pull/4003 chore(deps): bump the actions group across 1 directory with 8 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4014 fix: use hatch's default env so the uv installer is inherited by @lhoupert in https://github.com/zarr-developers/zarr-python/pull/4023 chore: update pre-commit hooks by @pre-commit-ci[bot] in https://github.com/zarr-developers/zarr-python/pull/4024 docs: test more code snippets in docs by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4018 chore(deps-dev): bump uv from 0.11.14 to 0.11.15 in the uv group across 1 directory by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4019 refactor: remove random subchunk ordering by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4011 fix: make xarray downstream tests work by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4043 test: add property tests for block and mask indexing by @maxrjones in https://github.com/zarr-developers/zarr-python/pull/4054 refactor: use backported sentinel type by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4046 chore(deps): bump aiohttp from 3.13.5 to 3.14.0 in the uv group across 1 directory by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4031 Revert "fix: make xarray downstream tests work" by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4047 chore: indexing test cleanup by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4001 refactor/consolidated JSON IO routines by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3998 chore(deps): bump the actions group with 3 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4058 Modify custom dtype example to use only public API by @chuckwondo in https://github.com/zarr-developers/zarr-python/pull/4052 fix: copy attributes passed from the user to avoid mutation by @stibrew in https://github.com/zarr-developers/zarr-python/pull/4060 docs: add core-developer self-merge policy by @maxrjones in https://github.com/zarr-developers/zarr-python/pull/4053 fix![zarr-metadata]: define JSONValue type, and narrow object annotations to use JSONValue by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4037 perf: cache lexicographic chunk coords in sharding codec by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4012 deprecate more enums by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3968 fix: update OSPO action references to canonical org path by @zkoppert in https://github.com/zarr-developers/zarr-python/pull/3856 chore(deps): bump tornado from 6.5.5 to 6.5.6 in the uv group across 1 directory by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4062 harden developer environment by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4066 chore(deps): bump codecov/codecov-action from 6.0.1 to 7.0.0 in the actions group by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4071 chore(deps): bump the python-dependencies group with 14 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4072 chore(deps): bump tornado from 6.5.6 to 6.5.7 by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4067 chore(deps): bump cryptography from 48.0.0 to 48.0.1 by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4070 chore(deps): bump aiohttp from 3.14.0 to 3.14.1 by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4069 Claude/storage codec bugfixes by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4074 chore(deps): bump bleach from 6.3.0 to 6.4.0 by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4081 Control sharding codec read coalescing with ArrayConfig and runtime config options by @aldenks in https://github.com/zarr-developers/zarr-python/pull/3987 chore(deps-dev): bump the python-dependencies group across 1 directory with 2 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4080 allow roundtripping the BytesCodec by @keewis in https://github.com/zarr-developers/zarr-python/pull/3417 feat![zarr-metadata]: extensive top-level exports by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4083 zarr metadata 0.3.0 by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4084 Claude/py312 modernizations by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4087 chore(deps): bump CodSpeedHQ/action from 4.17.0 to 4.17.5 in the actions group by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4079 chore: add rectilinear hypothesis block indexing tests by @maxrjones in https://github.com/zarr-developers/zarr-python/pull/4075 chore(deps): bump pydantic-settings from 2.14.1 to 2.14.2 by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4089 chore: dependabot only updates direct dependencies by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4090 chore(deps): bump msgpack from 1.1.2 to 1.2.1 by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4088 test: pytest cleanups / modernization by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4093 fix(testing): correct delete_dir prefix matching in stateful tests by @NIK-TIGER-BILL in https://github.com/zarr-developers/zarr-python/pull/4002 chore(deps): bump the actions group with 3 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4097 Remove struct unstable warning by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4100 chore: test correctness fixes by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4094 Fix save/load for scalar arrays by @gaoflow in https://github.com/zarr-developers/zarr-python/pull/4103 docs: add reviewer guidance and author attestation to PR template by @maxrjones in https://github.com/zarr-developers/zarr-python/pull/4106 docs: document zarr.errors changes in the v3 migration guide by @NIK-TIGER-BILL in https://github.com/zarr-developers/zarr-python/pull/4110 refactor(testing): call super().init in LatencyStore by @maxrjones in https://github.com/zarr-developers/zarr-python/pull/4102 Claude/internal simplifications by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4105 Fix minor documentation issues by @DimitriPapadopoulos in https://github.com/zarr-developers/zarr-python/pull/4120 fix: keep element order when writing F-contiguous chunks with vlen codecs by @oldrobotdev in https://github.com/zarr-developers/zarr-python/pull/4116 test: consolidate vlen F-contiguous regression tests by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4122 chore(deps): bump the actions group with 5 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4114 chore(deps): bump joserfc from 1.6.5 to 1.6.8 by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4123 chore: update pre-commit hooks by @pre-commit-ci[bot] in https://github.com/zarr-developers/zarr-python/pull/4125 Remove broken badge by @DimitriPapadopoulos in https://github.com/zarr-developers/zarr-python/pull/4121 docs: fix CacheStore max_age_seconds docstring default by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4133 chore(deps): bump the actions group with 3 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4135 ci: stop dependabot updates targeting support/v2 by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4136 docs: fix errors and improve consistency across the documentation by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4132 test: pass a list, not a generator, to parametrize in test_docs by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4138 docs: clarify difference between load and open in docstrings by @SAY-5 in https://github.com/zarr-developers/zarr-python/pull/3984 chore(deps): bump the python-dependencies group across 1 directory with 13 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4137 test: bind moto server to an ephemeral port to fix xdist deadlock by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4139 test: enable pytest strict mode, fix duplicate parametrization ids, and add 10m timeout to individual tests by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4140 perf: use sync methods for chunk encoding / decoding by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/3885 test: ignore Python 3.15 fork-with-threads DeprecationWarning in test_multiprocessing by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4143 fix: skip object store prefix markers in list_dir by @AMBRA7592 in https://github.com/zarr-developers/zarr-python/pull/4117 fix: byte-order handling for structured dtypes in the bytes codec by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4142 chore: add Ilan Gold to the team list by @ilan-gold in https://github.com/zarr-developers/zarr-python/pull/4145 docs: 3.3.0 release notes by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4148 chore: CI worfklows for linting docs by @maxrjones in https://github.com/zarr-developers/zarr-python/pull/4076 chore: cleanup indentation and guidance for release by @maxrjones in https://github.com/zarr-developers/zarr-python/pull/4153 chore(deps): bump the actions group across 1 directory with 6 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4152 Fix/memorystore buffer aliasing by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4157 chore: refine link checker configuration by @maxrjones in https://github.com/zarr-developers/zarr-python/pull/4158 fix(store): don't close a shared filesystem in FsspecStore.close() by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4165 chore(deps): bump setuptools from 82.0.1 to 83.0.0 by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4176 chore(deps): bump pillow from 12.2.0 to 12.3.0 by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4169 chore(deps): bump the actions group with 3 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4181 feat: ZipStore accepts open binary file-like objects by @jhamman in https://github.com/zarr-developers/zarr-python/pull/4187 feat: add type-safe get_array and get_group methods to AsyncGroup and Group by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4128 feat(zarr-metadata): Zarr metadata model layer by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4119 fix: let open_like create arrays by default by @goutamadwant in https://github.com/zarr-developers/zarr-python/pull/4146 fix: keep FusedCodecPipeline compute off the event-loop thread by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4194 fix(ArraySpec): proper and robust equality semantics for ArraySpec by checking fill_value for byte-identicality, fixes #3054. by @sehoffmann in https://github.com/zarr-developers/zarr-python/pull/4183 fix: make benchmark page-cache clearing opt-in, never prompt for sudo by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4200 perf(indexing): speed up sorted 1-D coordinate selections by @selmanozleyen in https://github.com/zarr-developers/zarr-python/pull/4172 fix: FusedCodecPipeline falls back to async path for sharded arrays with async-only inner codecs by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4179 fix: fused pipeline falls back for partial-mixin codecs without sync partial methods by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4201 fix: FusedCodecPipeline must apply outer AA/BB codecs on partial paths by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4202 fix(fused codec pipeline): bulk shard decode must only engage for identity full reads by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4203 docs(zarr-metadata): standalone documentation site; add package justfile by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4208 docs(zarr-metadata): docs-site polish: repo link, titles, RTD build skips, branding by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4210 chore(zarr-metadata): build 0.4.0 changelog by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4211 docs: fix link checker errors and warnings; run weekly by @maxrjones in https://github.com/zarr-developers/zarr-python/pull/4214 fix: ManagedMemoryStore sync methods must respect the path prefix by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4204 fix: minor correctness and hygiene fixes from the sync-pipeline audit by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4205 chore(deps): bump the python-dependencies group across 1 directory with 11 updates by @dependabot[bot] in https://github.com/zarr-developers/zarr-python/pull/4216 fix: reject malformed chunk keys in DefaultChunkKeyEncoding by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4219 fix: explicit store sync-IO capability; wrappers forward it; LatencyStore fixes by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4206 docs: add dev blog, update 3.3.0 release notes by @d-v-b in https://github.com/zarr-developers/zarr-python/pull/4191 New Contributors @chuckwondo made their first contribution in https://github.com/zarr-developers/zarr-python/pull/3947 @kabilar made their first contribution in https://github.com/zarr-developers/zarr-python/pull/3957 @NIK-TIGER-BILL made their first contribution in https://github.com/zarr-developers/zarr-python/pull/3966 @josh-ag2 made their first contribution in https://github.com/zarr-developers/zarr-python/pull/4003 @lhoupert made their first contribution in https://github.com/zarr-developers/zarr-python/pull/4023 @stibrew made their first contribution in https://github.com/zarr-developers/zarr-python/pull/4060 @zkoppert made their first contribution in https://github.com/zarr-developers/zarr-python/pull/3856 @gaoflow made their first contribution in https://github.com/zarr-developers/zarr-python/pull/4103 @oldrobotdev made their first contribution in https://github.com/zarr-developers/zarr-python/pull/4116 @SAY-5 made their first contribution in https://github.com/zarr-developers/zarr-python/pull/3984 @AMBRA7592 made their first contribution in https://github.com/zarr-developers/zarr-python/pull/4117 @goutamadwant made their first contribution in https://github.com/zarr-developers/zarr-python/pull/4146 @sehoffmann made their first contribution in https://github.com/zarr-developers/zarr-python/pull/4183 @selmanozleyen made their first contribution in https://github.com/zarr-developers/zarr-python/pull/4172 Full Changelog: https://github.com/zarr-developers/zarr-python/compare/v3.2.1...v3.3.0