coffea

What's Changed

• feat: disable virtual array caching on themselves if a nanoevents buffer cache is used by @ikrommyd in https://github.com/scikit-hep/coffea/pull/1507
• chore: more restrictive linting in ruff by @lgray in https://github.com/scikit-hep/coffea/pull/1505
• ci: bump actions/attest-build-provenance from 3.0.0 to 3.1.0 by @dependabot[bot] in https://github.com/scikit-hep/coffea/pull/1509
• ci(pre-commit): pre-commit autoupdate by @pre-commit-ci[bot] in https://github.com/scikit-hep/coffea/pull/1510
• chore: fix treemaker schema uproot writing test to write TTree by @ariostas in https://github.com/scikit-hep/coffea/pull/1514
• feat: Schema updates to run on PHYSLITE processed through ServiceX + link improvements by @ponyisi in https://github.com/scikit-hep/coffea/pull/1511
• ci: bump actions/attest-build-provenance from 3.1.0 to 3.2.0 by @dependabot[bot] in https://github.com/scikit-hep/coffea/pull/1515
• feat: let zero-event files go through pre-processing by @ikrommyd in https://github.com/scikit-hep/coffea/pull/1501
• ci(pre-commit): pre-commit autoupdate by @pre-commit-ci[bot] in https://github.com/scikit-hep/coffea/pull/1516
• fix: UpDownSystematic test being skipped due to typo + use public ak.mixin_class for systemetics by @ikrommyd in https://github.com/scikit-hep/coffea/pull/1517
• chore: remove deprecations by @ikrommyd in https://github.com/scikit-hep/coffea/pull/1519
• ci: bump actions/attest-build-provenance from 3.2.0 to 4.1.0 by @dependabot[bot] in https://github.com/scikit-hep/coffea/pull/1523
• ci(pre-commit): pre-commit autoupdate by @pre-commit-ci[bot] in https://github.com/scikit-hep/coffea/pull/1524
• chore: update uproot pin and use https for logo in README by @ikrommyd in https://github.com/scikit-hep/coffea/pull/1526
• docs: Adding recipe for what to do with fake None-able arrays in dask-wrapper tools by @yimuchen in https://github.com/scikit-hep/coffea/pull/1525
• feat: add buffer caches by @pfackeldey in https://github.com/scikit-hep/coffea/pull/1508
• feat: correctionlib (JSON-POG) adapter classes for CorrectedJetsFactory by @alefisico in https://github.com/scikit-hep/coffea/pull/1521
• ci: use conda for CI testing setup by @ikrommyd in https://github.com/scikit-hep/coffea/pull/1540
• ci: bump mamba-org/setup-micromamba from 2 to 3 by @dependabot[bot] in https://github.com/scikit-hep/coffea/pull/1542
• ci: bump codecov/codecov-action from 5 to 6 by @dependabot[bot] in https://github.com/scikit-hep/coffea/pull/1543
• ci(pre-commit): pre-commit autoupdate by @pre-commit-ci[bot] in https://github.com/scikit-hep/coffea/pull/1546
• feat: add uproot_options in preprocessing by @ikrommyd in https://github.com/scikit-hep/coffea/pull/1545
• feat: improve nanoevents reading error messages and allow reading from string root file path as long as treepath is specified by @ikrommyd in https://github.com/scikit-hep/coffea/pull/1531
• ci: start testing 3.14t by @ikrommyd in https://github.com/scikit-hep/coffea/pull/1541
• feat: add preload feature to Runner API by @pfackeldey in https://github.com/scikit-hep/coffea/pull/1423

New Contributors

• @ponyisi made their first contribution in https://github.com/scikit-hep/coffea/pull/1511

Full Changelog: https://github.com/scikit-hep/coffea/compare/v2025.12.0...v2026.4.0