Release Notes

Released on 2025-12-18.

Preview features

• [formatter] Fluent formatting of method chains (#21369)
• [formatter] Keep lambda parameters on one line and parenthesize the body if it expands (#21385)
• [flake8-implicit-str-concat] New rule to prevent implicit string concatenation in collections (ISC004) (#21972)
• [flake8-use-pathlib] Make fixes unsafe when types change in compound statements (PTH104, PTH105, PTH109, PTH115) (#22009)
• [refurb] Extend support for Path.open (FURB101, FURB103) (#21080)

Bug fixes

• [pyupgrade] Fix parsing named Unicode escape sequences (UP032) (#21901)

Rule changes

• [eradicate] Ignore ruff:disable and ruff:enable comments in ERA001 (#22038)
• [flake8-pytest-style] Allow match and check keyword arguments without an expected exception type (PT010) (#21964)
• [syntax-errors] Annotated name cannot be global (#20868)

Documentation

• Add uv and ty to the Ruff README (#21996)
• Document known lambda formatting deviations from Black (#21954)
• Update setup.md (#22024)
• [flake8-bandit] Fix broken link (S704) (#22039)

Other changes

• Fix playground Share button showing "Copied!" before clipboard copy completes (#21942)

Contributors

• @dylwil3
• @charliecloudberry
• @charliermarsh
• @chirizxc
• @ntBre
• @zanieb
• @amyreese
• @hauntsaninja
• @11happy
• @mahiro72
• @MichaReiser

Install ruff 0.14.10

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/astral-sh/ruff/releases/download/0.14.10/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://github.com/astral-sh/ruff/releases/download/0.14.10/ruff-installer.ps1 | iex"

Download ruff 0.14.10

| 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 | | | | x64 Windows | | | | ARM64 Linux | | | | x86 Linux | | | | PPC64 Linux | | | | PPC64LE Linux | | | | RISCV Linux | | | | S390x Linux | | | | x64 Linux | | | | ARMv7 Linux | | | | ARM64 MUSL Linux | | | | x86 MUSL Linux | | | | x64 MUSL Linux | | | | ARMv6 MUSL Linux (Hardfloat) | | | | ARMv7 MUSL Linux | |