refactor: rename SetsRange to SupportsSetRange, explicit subclassing

Consistent with SupportsGetSync/SupportsSetSync naming convention.
MemoryStore and LocalStore now explicitly subclass SupportsSetRange.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: d-v-b

src/zarr/abc/store.py

@@ -19,10 +19,10 @@
 __all__ = [
     "ByteGetter",
     "ByteSetter",
-    "SetsRange",
     "Store",
     "SupportsDeleteSync",
     "SupportsGetSync",
+    "SupportsSetRange",
     "SupportsSetSync",
     "SupportsSyncStore",
     "set_or_delete",
@@ -711,7 +711,7 @@ async def set_if_not_exists(self, default: Buffer) -> None: ...
 
 
 @runtime_checkable
-class SetsRange(Protocol):
+class SupportsSetRange(Protocol):
     """Protocol for stores that support writing to a byte range within an existing value."""
 
     async def set_range(self, key: str, value: Buffer, start: int) -> None: ...

src/zarr/core/codec_pipeline.py

@@ -1953,7 +1953,7 @@ async def _process_chunk(
             out_selection: SelectorTuple,
             is_complete: bool,
         ) -> None:
-            from zarr.abc.store import SetsRange
+            from zarr.abc.store import SupportsSetRange
             from zarr.storage._common import StorePath
 
             # Stage 1: IO — fetch existing (skip for complete overwrites)
@@ -1964,7 +1964,7 @@ async def _process_chunk(
 
             # Determine whether the store supports byte-range writes
             supports_partial_store = isinstance(byte_setter, StorePath) and isinstance(
-                byte_setter.store, SetsRange
+                byte_setter.store, SupportsSetRange
             )
 
             # Stage 2: Compute — decode, merge, re-encode (thread pool)
@@ -2106,15 +2106,17 @@ def write_sync(
         if not batch:
             return
 
-        from zarr.abc.store import SetsRange
+        from zarr.abc.store import SupportsSetRange
         from zarr.storage._common import StorePath
 
         for bs, chunk_spec, chunk_selection, out_selection, is_complete in batch:
             existing: Buffer | None = None
             if not is_complete:
                 existing = bs.get_sync(prototype=chunk_spec.prototype)  # type: ignore[attr-defined]
 
-            supports_partial_store = isinstance(bs, StorePath) and isinstance(bs.store, SetsRange)
+            supports_partial_store = isinstance(bs, StorePath) and isinstance(
+                bs.store, SupportsSetRange
+            )
 
             blob = self._transform_write(
                 existing,

src/zarr/storage/_local.py

@@ -16,6 +16,7 @@
     RangeByteRequest,
     Store,
     SuffixByteRequest,
+    SupportsSetRange,
 )
 from zarr.core.buffer import Buffer
 from zarr.core.buffer.core import default_buffer_prototype
@@ -92,7 +93,7 @@ def _put(path: Path, value: Buffer, exclusive: bool = False) -> int:
         return f.write(view)
 
 
-class LocalStore(Store):
+class LocalStore(Store, SupportsSetRange):
     """
     Store for the local file system.
 

src/zarr/storage/_memory.py

@@ -3,7 +3,7 @@
 from logging import getLogger
 from typing import TYPE_CHECKING, Any, Self
 
-from zarr.abc.store import ByteRequest, Store
+from zarr.abc.store import ByteRequest, Store, SupportsSetRange
 from zarr.core.buffer import Buffer, gpu
 from zarr.core.buffer.core import default_buffer_prototype
 from zarr.core.common import concurrent_map
@@ -18,7 +18,7 @@
 logger = getLogger(__name__)
 
 
-class MemoryStore(Store):
+class MemoryStore(Store, SupportsSetRange):
     """
     Store for local memory.
 

tests/test_phased_codec_pipeline.py

@@ -9,7 +9,7 @@
 import pytest
 
 import zarr
-from zarr.abc.store import SetsRange
+from zarr.abc.store import SupportsSetRange
 from zarr.codecs.bytes import BytesCodec
 from zarr.codecs.gzip import GzipCodec
 from zarr.codecs.transpose import TransposeCodec
@@ -425,9 +425,9 @@ def test_streaming_write_partial_update() -> None:
 
 
 def test_memory_store_supports_byte_range_setter() -> None:
-    """MemoryStore should implement SetsRange."""
+    """MemoryStore should implement SupportsSetRange."""
     store = zarr.storage.MemoryStore()
-    assert isinstance(store, SetsRange)
+    assert isinstance(store, SupportsSetRange)
 
 
 def test_memory_store_set_range() -> None: