astral-sh/ruff 0.16.8

on GitHub

Release Notes

Released on 2026-09-16.

Bug fixes

• Visit functional TypedDict keyword arguments correctly (#28584)
• [flake8-simplify] Detect nested async with under sync parent (SIM117) (#27821)
• [flake8-simplify] Preserve operand order in SIM109 fix (#27824)
• [pyupgrade] Preserve required parentheses in multiline UP040 fixes (#28164)
• [pyupgrade] Skip TypeVarTuple and ParamSpec conversions with bounds or constraints (UP040, UP046, UP047) (#28505)

Rule changes

• Add support for __lazy_modules__ (#28459)
• Recognize PEP-728 TypedDict class keywords (#28533)
• Recognize quoted types in typing.TypeForm (#28507)
• Support conditional assignment to __lazy_modules__ (#28491)
• [flake8-type-checking] Prefer lazy imports over TYPE_CHECKING on Python 3.15 and later (TC001, TC002, TC003) (#28541)
• [pyupgrade] Make the fix for UP040 always unsafe (#28526)
• [pyupgrade] Stop recommending deprecated ByteString aliases (UP035) (#28498)
• [ruff, flake8-use-pathlib] Recognize the parent_mode argument (RUF064, PTH103) (#28528)
• [ruff] Detect \Z in pytest.raises() match patterns (RUF043) (#28598)

CLI

• Use rule name and code in formatter incompatibility warnings (#28571)

Configuration

• [flake8-tidy-imports] Add extend-banned-api (#28644)

Contributors

• @VedantMadane
• @alzeph
• @charliermarsh
• @fredrikblau
• @ntBre
• @zsol
• @Aniket-a14
• @r-b-1

Install ruff 0.16.8

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.16.8/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.16.8/ruff-installer.ps1 | iex"

Download ruff 0.16.8

Verifying GitHub Artifact Attestations

The artifacts in this release have attestations generated with GitHub Artifact Attestations. These can be verified by using the GitHub CLI:

gh attestation verify <file-path of downloaded artifact> --repo astral-sh/ruff

You can also download the attestation from GitHub and verify against that directly:

gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>