Issues

• Remote stores: a link to another store (source: "../other.nwb.zarr") resolves inside the current store

  hdmf-dev/hdmf-zarr#411 · Filter by author cboulay opened on Oct 12, 2026
  1

• Register hdmf-zarr's links and references encoding as a Zarr convention

  hdmf-dev/hdmf-zarr#410 · Filter by author bendichter opened on Oct 11, 2026
  3

• [Bug]: Files with int64 scalar attributes in an extension can't be read back (Python int rejected for int64)

  hdmf-dev/hdmf-zarr#409 · Filter by author bendichter opened on Oct 11, 2026

• [Bug]: Mode r- still reads through consolidated metadata with Zarr v3

  hdmf-dev/hdmf-zarr#407 · Filter by author ehennestad opened on Oct 3, 2026

• storage.rst claims the structured data_type carries full compound field information, but string field types are not recoverable

  hdmf-dev/hdmf-zarr#380 · Filter by author rly opened on Sep 15, 2026
  2

• Use build-in zarr v3 support for v2 (once implemented)

  hdmf-dev/hdmf-zarr#358 · Filter by author alejoe91 opened on Jul 14, 2026

• Add FssStreaming tests for Zarr v3

  help wanted: good first issuepriority: mediumtopic: testing
  hdmf-dev/hdmf-zarr#357 · Filter by author alejoe91 opened on Jun 26, 2026
  1

• Support lazy reading for zarr v2 arrays that zarr v3 cannot parse

  hdmf-dev/hdmf-zarr#356 · Filter by author alejoe91 opened on Jun 26, 2026

• [Feature]: Implement ZarrIO.is_open

  category: enhancementpriority: low
  hdmf-dev/hdmf-zarr#334 · Filter by author rly opened on Mar 14, 2026
  

• [Bug]: Streaming zarr file with extension fails

  category: bug
  hdmf-dev/hdmf-zarr#332 · Filter by author rly opened on Mar 3, 2026
  1

• Investigate how uint attributes are read

  priority: lowtopic: storage
  hdmf-dev/hdmf-zarr#323 · Filter by author rly opened on Dec 29, 2025

• [Feature]: Remove monkey-patched ConsolidatedMetadataStore.getsize for Zarr v3

  category: enhancementpriority: low
  hdmf-dev/hdmf-zarr#320 · Filter by author rly opened on Dec 23, 2025 · Future
  1

• [Bug]: pynwb validation fails with Zarr files due to unrecognized arguments

  hdmf-dev/hdmf-zarr#302 · Filter by author stephprince opened on Nov 24, 2025 · Future
  3

• [Documentation]: What is the meaning of zarr_dtype: "scalar"?

  hdmf-dev/hdmf-zarr#284 · Filter by author ehennestad opened on Jul 30, 2025 · 0.13.0
  1

• [Feature]: Load_namespaces consistency across ZarrIO and HDF5IO

  category: enhancementpriority: mediumtopic: ZarrIO
  hdmf-dev/hdmf-zarr#275 · Filter by author stephprince opened on May 7, 2025 · Future
  2

• [Bug]: Appending to ElectrodesTable in Zarr

  category: bug
  hdmf-dev/hdmf-zarr#268 · Filter by author oruebel opened on Apr 3, 2025 · Future
  7

• [Bug]: Export writes broken links when objects added from another file keep their original parent

  category: enhancementpriority: low
  hdmf-dev/hdmf-zarr#266 · Filter by author rly opened on Mar 4, 2025 · 0.13.0
  

• [Feature]: Add tests for reading from S3 bucket with references

  category: enhancement
  hdmf-dev/hdmf-zarr#252 · Filter by author rly opened on Dec 19, 2024 · Future

• HDMF-Zarr 2026 Major Roadmap

  category: proposalpriority: medium
  hdmf-dev/hdmf-zarr#246 · Filter by author rly opened on Dec 13, 2024 · Future
  4

  

• [Bug]: Cannot read remote files

  category: bugpriority: medium
  hdmf-dev/hdmf-zarr#228 · Filter by author mavaylon1 opened on Nov 8, 2024 · Future
  2

• [Bug]: Writing NWB with experimenter (or any ArrayLike[str]) fails

  category: bugpriority: low
  hdmf-dev/hdmf-zarr#197 · Filter by author bjhardcastle opened on May 23, 2024 · Future
  4

• [Feature]: Use copy_store for copying existing zarr data

  category: proposalpriority: mediumtopic: ZarrIO
  hdmf-dev/hdmf-zarr#191 · Filter by author bjhardcastle opened on May 7, 2024 · Future
  5

• [Feature]: Test without consolidate metadata

  category: enhancementpriority: low
  hdmf-dev/hdmf-zarr#148 · Filter by author mavaylon1 opened on Dec 12, 2023 · Future
  2

• [Bug]: reading unit table arrays via string keys much slower than reading as properties

  category: enhancementpriority: low
  hdmf-dev/hdmf-zarr#141 · Filter by author dyf opened on Nov 16, 2023 · Future
  3

  

• [Documentation]: Add tutorial for S3 streaming

  priority: mediumtopic: docs
  hdmf-dev/hdmf-zarr#140 · Filter by author oruebel opened on Nov 14, 2023 · 0.13.0
  1