Sourced from gcsfs's releases.

2026.5.0

What's Changed

• Fix zonal documentation about finalized objects by @​Mahalaxmibejugam in fsspec/gcsfs#828
• Enable branch wise tracking by @​googlyrahman in fsspec/gcsfs#819
• fix: adjust fsspec dependency version constraint by @​zhixiangli in fsspec/gcsfs#834
• Add support for partial prefixes in find method for HNS buckets by @​Mahalaxmibejugam in fsspec/gcsfs#831
• Add workflow to automate PyPI package publishing on release by @​Yonghui-Lee in fsspec/gcsfs#824
• Fix HttpError message formatting and handle None content in validate_response by @​zhixiangli in fsspec/gcsfs#835
• Integrate prefetcher engine with zonal buckets by @​googlyrahman in fsspec/gcsfs#805
• Update the benchmark config, and fix the block size propogation by @​googlyrahman in fsspec/gcsfs#808
• Add pypi environment to release workflow by @​Yonghui-Lee in fsspec/gcsfs#836

Full Changelog: https://github.com/fsspec/gcsfs/compare/2026.4.0...2026.5.0

v2026.3.0

Support for Rapid Buckets

• Native Rapid Bucket Creation: You can now create Rapid buckets directly via the API, enabling high-throughput and low-latency workloads for co-located compute[ PR #769](fsspec/gcsfs#769).
• Zonal Write Tracking: Improved accuracy in byte-count tracking for writes to Rapid storage to prevent data corruption during large transfers[ PR #777](fsspec/gcsfs#777).
• ExtendedGcsFileSystem is now the default implementation. This allows GCSFS to automatically handle modern GCS features like Hierarchical Namespace (HNS) and Rapid buckets without manual configuration.

Note: If you need to disable these new defaults and return to the legacy GCSFileSystem behavior, set the environment variable: GCSFS_EXPERIMENTAL_ZB_HNS_SUPPORT=disable

Support for Hierarchical Namespace (HNS)

• Atomic Folder Moves: Leverages HNS to make folder renames/moves a single metadata operation (O(1)) rather than a slow "copy-all-files-then-delete" process[ PR #758](fsspec/gcsfs#758).
• Rename Race Conditions: Fixed a bug where rapid folder renames in HNS buckets could cause temporary inconsistencies[ PR #771](fsspec/gcsfs#771).

API & Core Improvements

• Cleaner Listing: The ls and list methods now filter out invalid keyword arguments, ensuring more predictable behavior and better error messages[ PR #759](fsspec/gcsfs#759).
• Graceful Shutdown: Enhanced the close() logic to ensure that all background writes and sessions are finished properly before the process exits[ PR #763](fsspec/gcsfs#763).
• Testing, Benchmarks, & Docs
• New Documentation: Added extensive guides for using Zonal and Rapid storage[ PR #792](fsspec/gcsfs#792 PR #788](fsspec/gcsfs#788).
• Benchmarking Framework: Integrated microbenchmarks to track performance, specifically targeting the 8x QPS improvements promised by Rapid buckets[ PR #775](fsspec/gcsfs#775 PR #770](fsspec/gcsfs#770).
• CI Stability: Significant fixes to the CI/CD pipeline and test coverage to handle the new default bucket types[ PR #785](fsspec/gcsfs#785 PR #772](fsspec/gcsfs#772).

• 255e4f8 Add pypi environment to release workflow (#836)
• 2fa8b5a Update the benchmark config, and fix the block size propogation (#808)
• 37b7f1a Integrate prefetcher engine with zonal buckets (#805)
• b2af5b8 Merge pull request #835 from zhixiangli/fix-httperror-content-none
• b89bb89 Add workflow to automate PyPI package publishing on release (#824)
• 14bb32a Merge pull request #831 from ankitaluthra1/fix-find-partial-prefixes
• 820c041 fix: adjust fsspec dependency version constraint (#834)
• 005cc2e add more coverage
• c543729 fix issue with special characters in rm method
• 5cb0d32 Enable branch wise tracking (#819)
• Additional commits viewable in compare view

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