Sourced from ruff's releases.

0.15.4

Release Notes

Released on 2026-02-26.

This is a follow-up release to 0.15.3 that resolves a panic when the new rule PLR1712 was enabled with any rule that analyzes definitions, such as many of the ANN or D rules.

Bug fixes

• Fix panic on access to definitions after analyzing definitions (#23588)
• [pyflakes] Suppress false positive in F821 for names used before del in stub files (#23550)

Documentation

• Clarify first-party import detection in Ruff (#23591)
• Fix incorrect import-heading example (#23568)

Contributors

• @​stakeswky
• @​ntBre
• @​thejcannon
• @​GeObts

Install ruff 0.15.4

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/ruff/releases/download/0.15.4/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://github.com/astral-sh/ruff/releases/download/0.15.4/ruff-installer.ps1 | iex"

Download ruff 0.15.4

File	Platform	Checksum
ruff-aarch64-apple-darwin.tar.gz	Apple Silicon macOS	checksum
ruff-x86_64-apple-darwin.tar.gz	Intel macOS	checksum
ruff-aarch64-pc-windows-msvc.zip	ARM64 Windows	checksum
ruff-i686-pc-windows-msvc.zip	x86 Windows	checksum
ruff-x86_64-pc-windows-msvc.zip	x64 Windows	checksum
ruff-aarch64-unknown-linux-gnu.tar.gz	ARM64 Linux	checksum
ruff-i686-unknown-linux-gnu.tar.gz	x86 Linux	checksum
ruff-powerpc64-unknown-linux-gnu.tar.gz	PPC64 Linux	checksum

... (truncated)

Sourced from ruff's changelog.

0.15.4

Released on 2026-02-26.

This is a follow-up release to 0.15.3 that resolves a panic when the new rule PLR1712 was enabled with any rule that analyzes definitions, such as many of the ANN or D rules.

Bug fixes

• Fix panic on access to definitions after analyzing definitions (#23588)
• [pyflakes] Suppress false positive in F821 for names used before del in stub files (#23550)

Documentation

• Clarify first-party import detection in Ruff (#23591)
• Fix incorrect import-heading example (#23568)

Contributors

• @​stakeswky
• @​ntBre
• @​thejcannon
• @​GeObts

0.15.3

Released on 2026-02-26.

Preview features

• Drop explicit support for .qmd file extension (#23572)

  This can now be enabled instead by setting the extension option:

  # ruff.toml
  extension = { qmd = "markdown" }
  pyproject.toml
  [tool.ruff]
  extension = { qmd = "markdown" }

• Include configured extensions in file discovery (#23400)

• [flake8-bandit] Allow suspicious imports in TYPE_CHECKING blocks (S401-S415) (#23441)

• [flake8-bugbear] Allow B901 in pytest hook wrappers (#21931)

• [flake8-import-conventions] Add missing conventions from upstream (ICN001, ICN002) (#21373)

... (truncated)

• f14edd8 Bump 0.15.4 (#23595)
• fd09d37 Fix panic on access to definitions after analyzing definitions (#23588)
• 81d655f [pyflakes] suppress false positive in F821 for names used before del in...
• 625b4f5 [ruff] docs: Clarify first-party import detection in Ruff (#23591)
• 60facfa one word typo fix in a while_loop.md test case (#23589)
• fbb9fa7 docs: fix incorrect import-heading example (#23568)
• 5bc49a9 Increase the ruleset size to 16 bits (#23586)
• a62ba8c [ty] Fix overloaded callable assignability for unary Callable targets (#23277)
• e5f2f36 Bump 0.15.3 (#23585)
• 0e19fc9 [ty] defer calculating conjunctions in narrowing constraints (#23552)
• Additional commits viewable in compare view

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