Multistage rechunking for regular chunk grids#867
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This was referenced Jan 29, 2026
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This adapts the rechunker algorithm so it works correctly with regular chunks grids as we currently have with Zarr, fixing the bug found in #859.
Longer term we could consider variable chunking (i.e. Zarr's rectilinear chunk grid), which would be more efficient, but that isn't available in Zarr yet (and is more work).