3.5.0

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fix(metadata): validate codec chains against the threaded chunk spec

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Status: Open (in progress).

zarr-developers/zarr-pythonnumber 4352

#4352 In zarr-developers/zarr-python;

· d-v-b opened on Sep 14, 2026

fix(chunk-grids): one invariant for zero-length axes across model, clamps, and metadata

Status: Draft (not ready).

zarr-developers/zarr-pythonnumber 4334

#4334 In zarr-developers/zarr-python;

· d-v-b opened on Sep 9, 2026

Statically-typed configuration object (donfig retained as the config reader)

Status: Open (in progress).

zarr-developers/zarr-pythonnumber 4101

#4101 In zarr-developers/zarr-python;

· d-v-b opened on Jun 25, 2026

Add Store.get_many bulk fetch API

Status: Draft (not ready).

zarr-developers/zarr-pythonnumber 4112

#4112 In zarr-developers/zarr-python;

· TomNicholas opened on Jul 1, 2026

fix(metadata)!: make chunk sizes strict in metadata constructors and chunk specifications

Status: Draft (not ready).

zarr-developers/zarr-pythonnumber 4431

#4431 In zarr-developers/zarr-python;

· d-v-b opened on Sep 26, 2026

feat(array): add Array.dimension_names property

Status: Open (in progress).

zarr-developers/zarr-pythonnumber 4401

#4401 In zarr-developers/zarr-python;

· d-v-b opened on Sep 24, 2026

feat(attributes): warn when writing attributes that are not valid JSON

Status: Open (in progress).

zarr-developers/zarr-pythonnumber 4400

#4400 In zarr-developers/zarr-python;

· d-v-b opened on Sep 24, 2026

feat: open arrays and groups with a Context

Status: Open (in progress).

zarr-developers/zarr-pythonnumber 4388

#4388 In zarr-developers/zarr-python;

· d-v-b opened on Sep 23, 2026