Sourced from ruff's releases.

0.15.20

Release Notes

Released on 2026-06-25.

Preview features

• Allow human-readable names in rule selectors (#25887)
• Emit a warning instead of an error for unknown rule selectors (#26113)
• Match noqa shebang handling in ruff:ignore comments (#26286)
• [ruff] Remove pytest-fixture-autouse (RUF076) (#26240, #26371)

Documentation

• Add versioning sections to custom crate READMEs (#26317)
• Update ruff_python_parser README for crates.io (#26315)
• [perflint] Clarify that PERF402 applies to any iterable (#26242)

Contributors

• @​dhruvmanila
• @​MichaReiser
• @​ntBre
• @​trilamsr

Install ruff 0.15.20

Install prebuilt binaries via shell script

curl --proto '=https' --tlsv1.2 -LsSf https://releases.astral.sh/github/ruff/releases/download/0.15.20/ruff-installer.sh | sh

Install prebuilt binaries via powershell script

powershell -ExecutionPolicy Bypass -c "irm https://releases.astral.sh/github/ruff/releases/download/0.15.20/ruff-installer.ps1 | iex"

Download ruff 0.15.20

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

... (truncated)

Sourced from ruff's changelog.

0.15.20

Released on 2026-06-25.

Preview features

• Allow human-readable names in rule selectors (#25887)
• Emit a warning instead of an error for unknown rule selectors (#26113)
• Match noqa shebang handling in ruff:ignore comments (#26286)
• [ruff] Remove pytest-fixture-autouse (RUF076) (#26240, #26371)

Documentation

• Add versioning sections to custom crate READMEs (#26317)
• Update ruff_python_parser README for crates.io (#26315)
• [perflint] Clarify that PERF402 applies to any iterable (#26242)

Contributors

• @​dhruvmanila
• @​MichaReiser
• @​ntBre
• @​trilamsr

0.15.19

Released on 2026-06-23.

Preview features

• Support human-readable names when hovering suppression comments and in code actions (#26114)

Bug fixes

• Fall back to default settings when editor-only settings are invalid (#26244)
• Fix panic when inserting text at a notebook cell boundary (#26111)

Rule changes

• [pylint] Update fix suggestions for __floor__, __trunc__, __length_hint__, and __matmul__ variants (PLC2801) (#26239)

Performance

• Avoid allocating when parsing single string literals (#26200)
• Avoid reallocating singleton call arguments (#26223)
• Lazily create source files for lint diagnostics (#26226)
• Optimize formatter text width and indentation (#26236)
• Reserve capacity for builtin bindings (#26229)
• Skip repeated-key checks for singleton dictionaries (#26228)
• Use ArrayVec for qualified name segments (#26224)

... (truncated)

• f82a36b Bump 0.15.20 (#26376)
• af32943 Improve the summarise-ecosystem-results skill (#26378)
• 485ebab Remove RUF076 name from schema (#26371)
• ef81835 [ty] Implement rust-analyzer's "Click for full compiler diagnostic" feature (...
• 572b31e [ruff] Remove pytest-fixture-autouse (RUF076) (#26240)
• f703f21 Allow human-readable names in rule selectors (#25887)
• 0d726b2 [ty] Reuse equality semantics for membership compatibility (#25955)
• dbe6e98 [ty] Infer definite equality comparison results (#26337)
• e700ea3 [ty] Prove TypedDict structural patterns exhaustive (#26285)
• 6a0d2ec [ty] Widen inferred class-valued instance attributes (#26338)
• Additional commits viewable in compare view

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