3.0.7 (2025-04-22)

Features

- Add experimental ObjectStore storage class based on obstore. (:issue:`1661`)

- Add ``zarr.from_array`` using concurrent streaming of source data (:issue:`2622`)

Bugfixes

- 0-dimensional arrays are now returning a scalar. Therefore, the return type of ``__getitem__`` changed

to NDArrayLikeOrScalar. This change is to make the behavior of 0-dimensional arrays consistent with

``numpy`` scalars. (:issue:`2718`)

- Fix `fill_value` serialization for `NaN` in `ArrayV2Metadata` and add property-based testing of round-trip serialization (:issue:`2802`)

- Fixes `ConsolidatedMetadata` serialization of `nan`, `inf`, and `-inf` to be

consistent with the behavior of `ArrayMetadata`. (:issue:`2996`)

Improved Documentation

- Updated the 3.0 migration guide to include the removal of "." syntax for getting group members. (:issue:`2991`, :issue:`2997`)

Misc

- Define a new versioning policy based on Effective Effort Versioning. This replaces the old Semantic

Versioning-based policy. (:issue:`2924`, :issue:`2910`)

- Make warning filters in the tests more specific, so warnings emitted by tests added in the future

are more likely to be caught instead of ignored. (:issue:`2714`)

- Avoid an unnecessary memory copy when writing Zarr to a local file (:issue:`2944`)