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Add Array.prepend and the regular_bounded chunk grid - #4516

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rhoadesScholar wants to merge 7 commits into

zarr-developers:mainfrom

rhoadesScholar:offset-chunk-key-encoding

Draft

Add Array.prepend and the regular_bounded chunk grid#4516
rhoadesScholar wants to merge 7 commits into
zarr-developers:mainfrom
rhoadesScholar:offset-chunk-key-encoding

Commits on Oct 15, 2026
- Add the offset chunk key encoding and Array.prepend
  
  rhoadesScholar
  and
  claude
  committed
  8c6b986
- prepend: grow by whole shards when sharded, normalise a negative axis
  
  rhoadesScholar
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  claude
  committed
  6b0cdf7
- prepend: keep the append mirror only, move the reasoning to the PR
  
  rhoadesScholar
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  claude
  committed
  fd613c3
- changelog: name the fragment after the PR
  
  rhoadesScholar
  and
  claude
  committed
  5375df3
Commits on Oct 16, 2026
- tests: prepend from a list and on a rectilinear grid
  
  rhoadesScholar
  and
  claude
  committed
  86e0b74
- tests: enable rectilinear chunks for the refusal case
  
  rhoadesScholar
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  claude
  committed
  7501ff3
- Prepend through a regular_bounded chunk grid instead of an offset key encoding
  
  rhoadesScholar
  and
  claude
  committed
  fb48e95