From dd6955def816d689acec1e0e4465145e0787c500 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 3 Aug 2026 19:31:17 +0000
Subject: [PATCH 1/2] chore: update pre-commit hooks
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.15.20 → v0.16.1](https://github.com/astral-sh/ruff-pre-commit/compare/v0.15.20...v0.16.1)
- [github.com/codespell-project/codespell: v2.4.2 → v2.4.3](https://github.com/codespell-project/codespell/compare/v2.4.2...v2.4.3)
- [github.com/DavidAnson/markdownlint-cli2: v0.22.1 → v0.23.2](https://github.com/DavidAnson/markdownlint-cli2/compare/v0.22.1...v0.23.2)
- [github.com/zizmorcore/zizmor-pre-commit: v1.26.1 → v1.29.0](https://github.com/zizmorcore/zizmor-pre-commit/compare/v1.26.1...v1.29.0)
---
 .pre-commit-config.yaml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 57a1d0d4f7..4d9bc5fd87 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,13 +15,13 @@ default_language_version:
 
 repos:
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.15.20
+    rev: v0.16.1
     hooks:
       - id: ruff-check
         args: ["--fix", "--show-fixes"]
       - id: ruff-format
   - repo: https://github.com/codespell-project/codespell
-    rev: v2.4.2
+    rev: v2.4.3
     hooks:
       - id: codespell
         args: ["-L", "fo,ihs,kake,te", "-S", "fixture"]
@@ -32,7 +32,7 @@ repos:
         exclude: mkdocs.yml
       - id: trailing-whitespace
   - repo: https://github.com/DavidAnson/markdownlint-cli2
-    rev: v0.22.1
+    rev: v0.23.2
     hooks:
       # Markdown structure/hygiene. Rule selection and ignores are in
       # .markdownlint-cli2.jsonc; complements ci/lint_docs.py (RST residue,
@@ -68,7 +68,7 @@ repos:
         types: [python]
         files: ^(src|tests)/
   - repo: https://github.com/zizmorcore/zizmor-pre-commit
-    rev: v1.26.1
+    rev: v1.29.0
     hooks:
       - id: zizmor
   - repo: https://github.com/twisted/towncrier

From 98ba5eb05f0f6c8065e47733e8ff31a266643f8a Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 3 Aug 2026 19:31:52 +0000
Subject: [PATCH 2/2] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 src/zarr/api/synchronous.py      | 2 +-
 src/zarr/codecs/sharding.py      | 2 +-
 src/zarr/core/array.py           | 6 +++---
 src/zarr/testing/strategies.py   | 4 ++--
 tests/test_api.py                | 2 +-
 tests/test_codecs/test_blosc.py  | 2 +-
 tests/test_dtype_registry.py     | 2 +-
 tests/test_store/test_object.py  | 1 -
 tests/test_unified_chunk_grid.py | 4 ++--
 9 files changed, 12 insertions(+), 13 deletions(-)

diff --git a/src/zarr/api/synchronous.py b/src/zarr/api/synchronous.py
index ebf42dca37..30ddf9ce6a 100644
--- a/src/zarr/api/synchronous.py
+++ b/src/zarr/api/synchronous.py
@@ -998,7 +998,7 @@ def from_array(
     write_data: bool = True,
     name: str | None = None,
     chunks: ChunksLike | Literal["auto", "keep"] = "keep",
-    shards: ShardsLike | None | Literal["keep"] = "keep",
+    shards: ShardsLike | Literal["keep"] | None = "keep",
     filters: FiltersLike | Literal["keep"] = "keep",
     compressors: CompressorsLike | Literal["keep"] = "keep",
     serializer: SerializerLike | Literal["keep"] = "keep",
diff --git a/src/zarr/codecs/sharding.py b/src/zarr/codecs/sharding.py
index d8ca8bdf62..41780e45b4 100644
--- a/src/zarr/codecs/sharding.py
+++ b/src/zarr/codecs/sharding.py
@@ -841,7 +841,7 @@ def _encode_partial_sync(
         # `_sentinel` distinguishes "not computed yet" from a memoized `None`
         # (an empty chunk).
         _sentinel = object()
-        scalar_complete_result: Buffer | None | object = _sentinel
+        scalar_complete_result: Buffer | object | None = _sentinel
 
         for chunk_coords, chunk_sel, out_sel, is_complete_chunk in indexer:
             if is_scalar and is_complete_chunk:
diff --git a/src/zarr/core/array.py b/src/zarr/core/array.py
index 2b31eefcd4..9cb66f339e 100644
--- a/src/zarr/core/array.py
+++ b/src/zarr/core/array.py
@@ -2181,7 +2181,7 @@ def filters(self) -> tuple[Numcodec, ...] | tuple[ArrayArrayCodec, ...]:
         return self.async_array.filters
 
     @property
-    def serializer(self) -> None | ArrayBytesCodec:
+    def serializer(self) -> ArrayBytesCodec | None:
         """
         Array-to-bytes codec to use for serializing the chunks into bytes.
         """
@@ -4072,7 +4072,7 @@ async def from_array(
     write_data: bool = True,
     name: str | None = None,
     chunks: ChunksLike | Literal["auto", "keep"] = "keep",
-    shards: ShardsLike | None | Literal["keep"] = "keep",
+    shards: ShardsLike | Literal["keep"] | None = "keep",
     filters: FiltersLike | Literal["keep"] = "keep",
     compressors: CompressorsLike | Literal["keep"] = "keep",
     serializer: SerializerLike | Literal["keep"] = "keep",
@@ -4763,7 +4763,7 @@ async def create_array(
 def _parse_keep_array_attr(
     data: AnyArray | npt.ArrayLike,
     chunks: ChunksLike | Literal["auto", "keep"],
-    shards: ShardsLike | None | Literal["keep"],
+    shards: ShardsLike | Literal["keep"] | None,
     filters: FiltersLike | Literal["keep"],
     compressors: CompressorsLike | Literal["keep"],
     serializer: SerializerLike | Literal["keep"],
diff --git a/src/zarr/testing/strategies.py b/src/zarr/testing/strategies.py
index 99e81b0389..4e90836b09 100644
--- a/src/zarr/testing/strategies.py
+++ b/src/zarr/testing/strategies.py
@@ -292,7 +292,7 @@ def arrays(
     if arrays is None:
         arrays = numpy_arrays(shapes=shapes)
     nparray = draw(arrays, label="array data")
-    dim_names: None | list[str | None] = None
+    dim_names: list[str | None] | None = None
     serializer: SerializerLike = "auto"
     compressors_unsearched: CompressorsLike = "auto"
 
@@ -328,7 +328,7 @@ def arrays(
         else:
             chunks_param = draw(chunk_shapes(shape=nparray.shape), label="chunk shape")
 
-            if all(s > c and c > 1 for s, c in zip(nparray.shape, chunks_param, strict=True)):
+            if all(s > c > 1 for s, c in zip(nparray.shape, chunks_param, strict=True)):
                 shard_shape = draw(
                     st.none() | shard_shapes(shape=nparray.shape, chunk_shape=chunks_param),
                     label="shard shape",
diff --git a/tests/test_api.py b/tests/test_api.py
index cbe8ea3b44..2b831e942d 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -419,7 +419,7 @@ async def test_open_group_unspecified_version(tmp_path: Path, zarr_format: ZarrF
 @pytest.mark.parametrize("n_args", [10, 1, 0])
 @pytest.mark.parametrize("n_kwargs", [10, 1, 0])
 @pytest.mark.parametrize("path", [None, "some_path"])
-def test_save(store: Store, n_args: int, n_kwargs: int, path: None | str) -> None:
+def test_save(store: Store, n_args: int, n_kwargs: int, path: str | None) -> None:
     data = np.arange(10)
     args = [np.arange(10) for _ in range(n_args)]
     kwargs = {f"arg_{i}": data for i in range(n_kwargs)}
diff --git a/tests/test_codecs/test_blosc.py b/tests/test_codecs/test_blosc.py
index f5f13f4d05..329304b80b 100644
--- a/tests/test_codecs/test_blosc.py
+++ b/tests/test_codecs/test_blosc.py
@@ -83,7 +83,7 @@ def test_tunable_attrs_param(
     # contaminating the BloscCodec construction below with that warning.
     if shuffle == "legacy-enum":
         with pytest.warns(DeprecationWarning, match="BloscShuffle.shuffle"):
-            shuffle_arg: None | BloscShuffleLiteral | str = BloscShuffle.shuffle
+            shuffle_arg: BloscShuffleLiteral | str | None = BloscShuffle.shuffle
     else:
         shuffle_arg = shuffle
 
diff --git a/tests/test_dtype_registry.py b/tests/test_dtype_registry.py
index f0946014fc..40239c1132 100644
--- a/tests/test_dtype_registry.py
+++ b/tests/test_dtype_registry.py
@@ -170,7 +170,7 @@ def test_entrypoint_dtype(zarr_format: ZarrFormat) -> None:
 )
 def test_parse_data_type(
     data_type: ZDType[Any, Any],
-    json_style: tuple[ZarrFormat, None | Literal["internal", "metadata"]],
+    json_style: tuple[ZarrFormat, Literal["internal", "metadata"] | None],
     dtype_parser_func: Any,
 ) -> None:
     """
diff --git a/tests/test_store/test_object.py b/tests/test_store/test_object.py
index cd85a48eb8..1ea148b3c3 100644
--- a/tests/test_store/test_object.py
+++ b/tests/test_store/test_object.py
@@ -1,4 +1,3 @@
-# ruff: noqa: E402
 import re
 from pathlib import Path
 from typing import TypedDict
diff --git a/tests/test_unified_chunk_grid.py b/tests/test_unified_chunk_grid.py
index 0df5a5d9fd..f0b54519ab 100644
--- a/tests/test_unified_chunk_grid.py
+++ b/tests/test_unified_chunk_grid.py
@@ -2784,8 +2784,8 @@ def test_rectilinear_roundtrip(json_input: RectilinearChunkGridMetadataJSON) ->
 
 pytest.importorskip("hypothesis")
 
-import hypothesis.strategies as st  # noqa: E402
-from hypothesis import event, given, settings  # noqa: E402
+import hypothesis.strategies as st
+from hypothesis import event, given, settings
 
 
 @st.composite