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3.4.2

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•Last updated Oct 21, 2026

Patch release after 3.4.1

30% complete

fix(storage): open ZipStore archive on first use from every method and reopen it without truncating
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#4450 opened Sep 29, 2026 · Updated Oct 8, 2026
1
fix(api): apply config when open_array opens an existing array
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#4408 opened Sep 25, 2026 · Updated Oct 8, 2026Draft
1
fix: ensure ZipStore is open before acquiring lock
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#3593 opened Nov 21, 2025 · Updated Oct 8, 2026
8
docs: define the public API in the contributing guide
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#4501 opened Oct 9, 2026 · Updated Oct 9, 2026Draft
docs: clarify Zarr v3 codec pipeline roles
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#4166 opened Jul 20, 2026 · Updated Oct 9, 2026
4
fix(array): keep other fields intact when writing one field of a structured array
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#4503 opened Oct 9, 2026 · Updated Oct 11, 2026Draft
1
fix(metadata): read Zarr V3.1 short-hand extension names
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#4506 opened Oct 10, 2026 · Updated Oct 10, 2026
1