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

Sourced from ruff's releases.

0.15.0

Release Notes

Released on 2026-02-03.

Check out the blog post for a migration guide and overview of the changes!

Breaking changes

• Ruff now formats your code according to the 2026 style guide. See the formatter section below or in the blog post for a detailed list of changes.

• The linter now supports block suppression comments. For example, to suppress N803 for all parameters in this function:

  # ruff: disable[N803]
  def foo(
      legacyArg1,
      legacyArg2,
      legacyArg3,
      legacyArg4,
  ): ...
  # ruff: enable[N803]
  

  See the documentation for more details.

• The ruff:alpine Docker image is now based on Alpine 3.23 (up from 3.21).

• The ruff:debian and ruff:debian-slim Docker images are now based on Debian 13 "Trixie" instead of Debian 12 "Bookworm."

• Binaries for the ppc64 (64-bit big-endian PowerPC) architecture are no longer included in our releases. It should still be possible to build Ruff manually for this platform, if needed.

• Ruff now resolves all extended configuration files before falling back on a default Python version.

Stabilization

The following rules have been stabilized and are no longer in preview:

• blocking-http-call-httpx-in-async-function (ASYNC212)
• blocking-path-method-in-async-function (ASYNC240)
• blocking-input-in-async-function (ASYNC250)
• map-without-explicit-strict (B912)
• if-exp-instead-of-or-operator (FURB110)
• single-item-membership-test (FURB171)
• missing-maxsplit-arg (PLC0207)
• unnecessary-lambda (PLW0108)
• unnecessary-empty-iterable-within-deque-call (RUF037)
• in-empty-collection (RUF060)
• legacy-form-pytest-raises (RUF061)
• non-octal-permissions (RUF064)

... (truncated)

Sourced from ruff's changelog.

0.15.0

Released on 2026-02-03.

Check out the blog post for a migration guide and overview of the changes!

Breaking changes

• Ruff now formats your code according to the 2026 style guide. See the formatter section below or in the blog post for a detailed list of changes.

• The linter now supports block suppression comments. For example, to suppress N803 for all parameters in this function:

  # ruff: disable[N803]
  def foo(
      legacyArg1,
      legacyArg2,
      legacyArg3,
      legacyArg4,
  ): ...
  # ruff: enable[N803]
  

  See the documentation for more details.

• The ruff:alpine Docker image is now based on Alpine 3.23 (up from 3.21).

• The ruff:debian and ruff:debian-slim Docker images are now based on Debian 13 "Trixie" instead of Debian 12 "Bookworm."

• Binaries for the ppc64 (64-bit big-endian PowerPC) architecture are no longer included in our releases. It should still be possible to build Ruff manually for this platform, if needed.

• Ruff now resolves all extended configuration files before falling back on a default Python version.

Stabilization

The following rules have been stabilized and are no longer in preview:

• blocking-http-call-httpx-in-async-function (ASYNC212)
• blocking-path-method-in-async-function (ASYNC240)
• blocking-input-in-async-function (ASYNC250)
• map-without-explicit-strict (B912)
• if-exp-instead-of-or-operator (FURB110)
• single-item-membership-test (FURB171)

... (truncated)

• ce5f7b6 Bump 0.15.0 (#23055)
• b4e40f5 [ty] Fix __contains__ to respect descriptors (#23056)
• 848cb72 [ty] Fix narrowing of nonlocal variables with conditional assignments (#22966)
• da7f33a [ty] Add a diagnostic for Final without assignment (#23001)
• e65f9a6 Document markdown formatting feature (#22990)
• c0c1b98 Format markdown code blocks with line-by-line regex parse (#22996)
• 9f8f3e1 Allow positional-only params with defaults in method overrides (#23037)
• ef83810 [ty] ecosystem-analyzer: Support bare git repositories (#23054)
• 54dfee4 Customize where the fix_title sub-diagnostic appears (#23044)
• b534607 2026 Ruff Formatter Style (#22735)
• Additional commits viewable in compare view

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