0.16.9

## Release Notes

Released on 2026-09-24.

### Preview features

- \[`ruff`\] Avoid false positives for overloaded division (`RUF069`) ([#28309](https://github.com/astral-sh/ruff/pull/28309))

### Bug fixes

- \[`flake8-bugbear`\] Avoid false positives for calls with keyword arguments (`B009`, `B010`, `B043`) ([#28776](https://github.com/astral-sh/ruff/pull/28776))
- \[`flake8-tidy-imports`\] Allow lazy imports to be used in deferred annotations (`TID255`) ([#28767](https://github.com/astral-sh/ruff/pull/28767))

### Rule changes

- Update LibCST-based fixes for Python 3.15 ([#28616](https://github.com/astral-sh/ruff/pull/28616))
- \[`flake8-pyi`\] Mention stubs in the diagnostic message (`PYI002`) ([#28542](https://github.com/astral-sh/ruff/pull/28542))

### Documentation

- Fix horizontal overflow on the rules documentation page ([#28699](https://github.com/astral-sh/ruff/pull/28699))
- Update rules table with category information ([#28651](https://github.com/astral-sh/ruff/pull/28651))
- \[`flake8-annotations`\] Clarify that `ANN401` checks return types in addition to arguments ([#28334](https://github.com/astral-sh/ruff/pull/28334))
- \[`flake8-bugbear`\] Document type-checker interaction (`B010`) ([#28509](https://github.com/astral-sh/ruff/pull/28509))
- \[`flake8-comprehensions`\] Document `map`/generator exception behavior (`C417`) ([#27794](https://github.com/astral-sh/ruff/pull/27794))
- \[`ruff`\] Mention related isort settings (`RUF022`) ([#28719](https://github.com/astral-sh/ruff/pull/28719))

### Contributors

- [@qinpei-dev](https://github.com/qinpei-dev)
- [@sanjayrohith](https://github.com/sanjayrohith)
- [@ntBre](https://github.com/ntBre)
- [@webdevsamran](https://github.com/webdevsamran)
- [@zaniebot](https://github.com/zaniebot)
- [@ewdurbin](https://github.com/ewdurbin)
- [@MichaReiser](https://github.com/MichaReiser)
- [@spaceone](https://github.com/spaceone)
- [@IbrahimKhan12](https://github.com/IbrahimKhan12)
- [@devtechedge](https://github.com/devtechedge)
- [@GruffElixir](https://github.com/GruffElixir)

## Install ruff 0.16.9

### Install prebuilt binaries via shell script

```sh
curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-installer.sh | sh
```

### Install prebuilt binaries via powershell script

```sh
powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-installer.ps1 | iex"
```

## Download ruff 0.16.9

|  File  | Platform | Checksum |
|--------|----------|----------|
| [ruff-aarch64-apple-darwin.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-aarch64-apple-darwin.tar.gz) | Apple Silicon macOS | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-aarch64-apple-darwin.tar.gz.sha256) |
| [ruff-x86_64-apple-darwin.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-x86_64-apple-darwin.tar.gz) | Intel macOS | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-x86_64-apple-darwin.tar.gz.sha256) |
| [ruff-aarch64-pc-windows-msvc.zip](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-aarch64-pc-windows-msvc.zip) | ARM64 Windows | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-aarch64-pc-windows-msvc.zip.sha256) |
| [ruff-i686-pc-windows-msvc.zip](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-i686-pc-windows-msvc.zip) | x86 Windows | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-i686-pc-windows-msvc.zip.sha256) |
| [ruff-x86_64-pc-windows-msvc.zip](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-x86_64-pc-windows-msvc.zip) | x64 Windows | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-x86_64-pc-windows-msvc.zip.sha256) |
| [ruff-aarch64-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-aarch64-unknown-linux-gnu.tar.gz) | ARM64 Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-aarch64-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-i686-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-i686-unknown-linux-gnu.tar.gz) | x86 Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-i686-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-powerpc64-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-powerpc64-unknown-linux-gnu.tar.gz) | PPC64 Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-powerpc64-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-powerpc64le-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-powerpc64le-unknown-linux-gnu.tar.gz) | PPC64LE Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-powerpc64le-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-riscv64gc-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-riscv64gc-unknown-linux-gnu.tar.gz) | RISCV Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-riscv64gc-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-s390x-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-s390x-unknown-linux-gnu.tar.gz) | S390x Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-s390x-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-x86_64-unknown-linux-gnu.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-x86_64-unknown-linux-gnu.tar.gz) | x64 Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-x86_64-unknown-linux-gnu.tar.gz.sha256) |
| [ruff-armv7-unknown-linux-gnueabihf.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-armv7-unknown-linux-gnueabihf.tar.gz) | ARMv7 Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-armv7-unknown-linux-gnueabihf.tar.gz.sha256) |
| [ruff-aarch64-unknown-linux-musl.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-aarch64-unknown-linux-musl.tar.gz) | ARM64 MUSL Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-aarch64-unknown-linux-musl.tar.gz.sha256) |
| [ruff-i686-unknown-linux-musl.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-i686-unknown-linux-musl.tar.gz) | x86 MUSL Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-i686-unknown-linux-musl.tar.gz.sha256) |
| [ruff-x86_64-unknown-linux-musl.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-x86_64-unknown-linux-musl.tar.gz) | x64 MUSL Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-x86_64-unknown-linux-musl.tar.gz.sha256) |
| [ruff-arm-unknown-linux-musleabihf.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-arm-unknown-linux-musleabihf.tar.gz) | ARMv6 MUSL Linux (Hardfloat) | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-arm-unknown-linux-musleabihf.tar.gz.sha256) |
| [ruff-armv7-unknown-linux-musleabihf.tar.gz](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-armv7-unknown-linux-musleabihf.tar.gz) | ARMv7 MUSL Linux | [checksum](https://releases.astral.sh/github/ruff/releases/download/0.16.9/ruff-armv7-unknown-linux-musleabihf.tar.gz.sha256) |

## 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](https://cli.github.com/manual/gh_attestation_verify):
```sh
gh attestation verify <file-path of downloaded artifact> --repo astral-sh/ruff
```

You can also download the attestation from [GitHub](https://github.com/astral-sh/ruff/attestations) and verify against that directly:
```sh
gh attestation verify <file-path of downloaded artifact> --bundle <file-path of downloaded attestation>
```