Sourced from mypy's changelog.

Mypy 1.19.1

• Fix noncommutative joins with bounded TypeVars (Shantanu, PR 20345)
• Respect output format for cached runs by serializing raw errors in cache metas (Ivan Levkivskyi, PR 20372)
• Allow types.NoneType in match cases (A5rocks, PR 20383)
• Fix mypyc generator regression with empty tuple (BobTheBuidler, PR 20371)
• Fix crash involving Unpack-ed TypeVarTuple (Shantanu, PR 20323)
• Fix crash on star import of redefinition (Ivan Levkivskyi, PR 20333)
• Fix crash on typevar with forward ref used in other module (Ivan Levkivskyi, PR 20334)
• Fail with an explicit error on PyPy (Ivan Levkivskyi, PR 20389)

Acknowledgements

Thanks to all mypy contributors who contributed to this release:

• A5rocks
• BobTheBuidler
• bzoracler
• Chainfire
• Christoph Tyralla
• David Foster
• Frank Dana
• Guo Ci
• iap
• Ivan Levkivskyi
• James Hilton-Balfe
• jhance
• Joren Hammudoglu
• Jukka Lehtosalo
• KarelKenens
• Kevin Kannammalil
• Marc Mueller
• Michael Carlstrom
• Michael J. Sullivan
• Piotr Sawicki
• Randolf Scholz
• Shantanu
• Sigve Sebastian Farstad
• sobolevn
• Stanislav Terliakov
• Stephen Morton
• Theodore Ando
• Thiago J. Barbalho
• wyattscarpenter

I’d also like to thank my employer, Dropbox, for supporting mypy development.

Mypy 1.18

We’ve just uploaded mypy 1.18.1 to the Python Package Index (PyPI). Mypy is a static type checker for Python. This release includes new features, performance

... (truncated)

• 412c19a Bump version to 1.19.1
• 20aea0a Update changelog for 1.19.1 (#20414)
• 2b23b50 Serialize raw errors in cache metas (#20372)
• f60f90f Fail on PyPy in main instead of setup.py (#20389)
• 58d485b Fail with an explicit error on PyPy (#20384)
• a4b31a2 Allow types.NoneType in match cases (#20383)
• 8a6eff4 [mypyc] fix generator regression with empty tuple (#20371)
• 70eceea Fix noncommutative joins with bounded TypeVars (#20345)
• 3890fc4 Fix crash involving Unpack-ed TypeVarTuple (#20323)
• c93d917 Fix crash on star import of redefinition (#20333)
• Additional commits viewable in compare view

Sourced from ruff's releases.

0.14.13

Release Notes

Released on 2026-01-15.

This is a follow-up release to 0.14.12. Because of an issue publishing the WASM packages, there is no GitHub release or Git tag for 0.14.12, although the package was published to PyPI. The contents of the 0.14.13 release are identical to 0.14.12.

0.14.12

Preview features

• [flake8-blind-except] Allow more logging methods (BLE001) (#22057)
• [ruff] Respect lint.pydocstyle.property-decorators in RUF066 (#22515)

Bug fixes

• Fix configuration path in --show-settings (#22478)
• Respect fmt: skip for multiple statements on the same logical line (#22119)

Rule changes

• [pydocstyle] Update Rust crate imperative to v1.0.7 (D401) (#22519)
• [isort] Insert imports in alphabetical order (I002) (#22493)

Documentation

• Add llms.txt support for documentation (#22463)
• Use prek in documentation and CI (#22505)
• [flake8-pytest-style] Add check parameter example to PT017 docs (#22546)
• [ruff] Make example error out-of-the-box (RUF103) (#22558)
• [ruff] document RUF100 trailing comment fix behavior (#22479)

Other changes

• wasm: Require explicit logging initialization (#22587)

Contributors

• @​terror
• @​harupy
• @​Jkhall81
• @​dhruvmanila
• @​lubaskinc0de
• @​zanieb
• @​MeGaGiGaGon
• @​charliermarsh
• @​renovate
• @​dylwil3
• @​MichaReiser
• @​11happy

... (truncated)

Sourced from ruff's changelog.

0.14.13

Released on 2026-01-15.

This is a follow-up release to 0.14.12. Because of an issue publishing the WASM packages, there is no GitHub release or Git tag for 0.14.12, although the package was published to PyPI. The contents of the 0.14.13 release are identical to 0.14.12.

0.14.12

Released on 2026-01-15.

Preview features

• [flake8-blind-except] Allow more logging methods (BLE001) (#22057)
• [ruff] Respect lint.pydocstyle.property-decorators in RUF066 (#22515)

Bug fixes

• Fix configuration path in --show-settings (#22478)
• Respect fmt: skip for multiple statements on the same logical line (#22119)

Rule changes

• [pydocstyle] Update Rust crate imperative to v1.0.7 (D401) (#22519)
• [isort] Insert imports in alphabetical order (I002) (#22493)

Documentation

• Add llms.txt support for documentation (#22463)
• Use prek in documentation and CI (#22505)
• [flake8-pytest-style] Add check parameter example to PT017 docs (#22546)
• [ruff] Make example error out-of-the-box (RUF103) (#22558)
• [ruff] document RUF100 trailing comment fix behavior (#22479)

Other changes

• wasm: Require explicit logging initialization (#22587)

Contributors

• @​terror
• @​harupy
• @​Jkhall81
• @​dhruvmanila
• @​lubaskinc0de
• @​zanieb
• @​MeGaGiGaGon
• @​charliermarsh
• @​renovate
• @​dylwil3
• @​MichaReiser

... (truncated)

• b4b8299 [ty] Make NamedTuple(...) and namedtuple(...) calls stricter (#22601)
• fd9f87d Bump 0.14.13 (#22604)
• 048f02f [ty] Remove redundant re-exports that share the same top-most module
• a72af10 [ty] Add ModuleName::top
• 2f34836 [ty] Add test capturing redundant re-exports from pandas
• db9eee7 [ty] Attach origin module on to re-exported symbols
• 2cbd68a [ty] Move fully qualified name into auto-import implementation
• 2a09467 Add trailing slashes to npm publish paths (#22603)
• eca58ca [ty] Override __file__ to str when applicable on imported modules (#22333)
• aa9f1b2 Further improvements to typing conformance script (#22596)
• Additional commits viewable in compare view

Sourced from black's releases.

26.1.0

Highlights

Introduces the 2026 stable style (#4892), stabilizing the following changes:

• always_one_newline_after_import: Always force one blank line after import statements, except when the line after the import is a comment or an import statement (#4489)
• fix_fmt_skip_in_one_liners: Fix # fmt: skip behavior on one-liner declarations, such as def foo(): return "mock" # fmt: skip, where previously the declaration would have been incorrectly collapsed (#4800)
• fix_module_docstring_detection: Fix module docstrings being treated as normal strings if preceded by comments (#4764)
• fix_type_expansion_split: Fix type expansions split in generic functions (#4777)
• multiline_string_handling: Make expressions involving multiline strings more compact (#1879)
• normalize_cr_newlines: Add \r style newlines to the potential newlines to normalize file newlines both from and to (#4710)
• remove_parens_around_except_types: Remove parentheses around multiple exception types in except and except* without as (#4720)
• remove_parens_from_assignment_lhs: Remove unnecessary parentheses from the left-hand side of assignments while preserving magic trailing commas and intentional multiline formatting (#4865)
• standardize_type_comments: Format type comments which have zero or more spaces between # and type: or between type: and value to # type: (value) (#4645)

The following change was not in any previous stable release:

• Regenerated the _width_table.py and added tests for the Khmer language (#4253)

This release alo bumps pathspec to v1 and fixes inconsistencies with Git's .gitignore logic (#4958). Now, files will be ignored if a pattern matches them, even if the parent directory is directly unignored. For example, Black would previously format exclude/not_this/foo.py with this .gitignore:

exclude/
!exclude/not_this/

Now, exclude/not_this/foo.py will remain ignored. To ensure exclude/not_this/ and all of it's children are included in formatting (and in Git), use this .gitignore:

*/exclude/*
!*/exclude/not_this/

This new behavior matches Git. The leading */ are only necessary if you wish to ignore matching subdirectories (like the previous behavior did), and not just matching root

... (truncated)

Sourced from black's changelog.

26.1.0

Highlights

Introduces the 2026 stable style (#4892), stabilizing the following changes:

• always_one_newline_after_import: Always force one blank line after import statements, except when the line after the import is a comment or an import statement (#4489)
• fix_fmt_skip_in_one_liners: Fix # fmt: skip behavior on one-liner declarations, such as def foo(): return "mock" # fmt: skip, where previously the declaration would have been incorrectly collapsed (#4800)
• fix_module_docstring_detection: Fix module docstrings being treated as normal strings if preceded by comments (#4764)
• fix_type_expansion_split: Fix type expansions split in generic functions (#4777)
• multiline_string_handling: Make expressions involving multiline strings more compact (#1879)
• normalize_cr_newlines: Add \r style newlines to the potential newlines to normalize file newlines both from and to (#4710)
• remove_parens_around_except_types: Remove parentheses around multiple exception types in except and except* without as (#4720)
• remove_parens_from_assignment_lhs: Remove unnecessary parentheses from the left-hand side of assignments while preserving magic trailing commas and intentional multiline formatting (#4865)
• standardize_type_comments: Format type comments which have zero or more spaces between # and type: or between type: and value to # type: (value) (#4645)

The following change was not in any previous stable release:

• Regenerated the _width_table.py and added tests for the Khmer language (#4253)

This release alo bumps pathspec to v1 and fixes inconsistencies with Git's .gitignore logic (#4958). Now, files will be ignored if a pattern matches them, even if the parent directory is directly unignored. For example, Black would previously format exclude/not_this/foo.py with this .gitignore:

exclude/
!exclude/not_this/

Now, exclude/not_this/foo.py will remain ignored. To ensure exclude/not_this/ and all of it's children are included in formatting (and in Git), use this .gitignore:

*/exclude/*
!*/exclude/not_this/

This new behavior matches Git. The leading */ are only necessary if you wish to ignore

... (truncated)

• 6305bf1 Prepare 2026.1.0 release (#4892)
• e71305b Bump pypa/cibuildwheel from 3.3.0 to 3.3.1 (#4961)
• 21a2a8c Fix Shutdown multiprocessing Manager in schedule_formatting (#4952)
• e3146ce Bump docker/setup-buildx-action from 3.11.1 to 3.12.0 (#4919)
• fe1fbc4 Bump actions/upload-artifact from 5.0.0 to 6.0.0 (#4923)
• 2b4b7fc Bump actions/download-artifact from 6.0.0 to 7.0.0 (#4922)
• d745be6 docs: document --force-exclude for pre-commit workflows (#4957)
• b41acd6 Various CI and doc refactors (#4928)
• 6f43612 Handle pathspec v1 changes (#4958)
• 200c550 Bump furo from 2025.9.25 to 2025.12.19 in /docs (#4933)
• Additional commits viewable in compare view

• b53ccba Merge branch 'release-1.42.30'
• c9f5d90 Bumping version to 1.42.30
• 9cf4452 Add changelog entries from botocore
• 9b45d7e Merge branch 'release-1.42.29'
• b0356c7 Merge branch 'release-1.42.29' into develop
• 159ed6d Bumping version to 1.42.29
• ed728b9 Add changelog entries from botocore
• d7af36d Merge branch 'release-1.42.28'
• c700a35 Merge branch 'release-1.42.28' into develop
• a6c52b0 Bumping version to 1.42.28
• Additional commits viewable in compare view

• 0c28fe5 release 9.9.0
• b33b134 whats new 9.9 (#15113)
• 3841c05 whats new 99
• 0423da8 Stop assuming that memory addresses are signed (#15111)
• 4d0cb19 Stop assuming that memory addresses are signed
• 4d71bcf Fix completions for methods starting with _ (#15106)
• 28d83b9 fix-test
• 74bf6d0 add-end-to-end-test
• e62c4ba fix-completions-for-private-attr
• 11e1f40 Add prompt_toolkit's unix_word_rubout to assignable commands for shortcuts (#...
• Additional commits viewable in compare view

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