chore(deps): bump ruff from 0.16.3 to 0.16.4 in /claude-agent-sdk

[dependabot]

Bumps ruff from 0.16.3 to 0.16.4.

Release notes

Sourced from ruff's releases.

0.16.4

Release Notes

Released on 2026-08-20.

Preview features

• [flake8-use-pathlib] Add autofix for PTH116 (#26460)
• [refurb] Restrict delete-full-slice to lists (FURB131) (#27711)
• [refurb] Skip FURB101 and FURB103 when the open argument is a file descriptor (#27643)

Bug fixes

• Fix InvalidInstruction on Windows CPUs that do not support POPCNT (#27803)
• [pyflakes] Emit semantic syntax errors in string type definitions as F722 (#27835)
• [pylint] Allow os._exit imports in import-private-name (PLC2701) (#27738)

Rule changes

• [syntax-errors] Align mixed t-string/bytes error message with CPython 3.14 (#27766)
• [ruff] Add ctypes.LittleEndianStructure and related types to existing exception (RUF012) (#27753)
• [syntax-errors] Detect duplicate keyword arguments (#17804)
• [syntax-errors] Detect parameters declared nonlocal (#27628)

Server

• Offer display-only fixes and mark safe fixes preferred (#27807)
• Support pull diagnostics for notebook cells (#27779)

Documentation

• Add default indicator to rules table (#27724)
• Fix broken link to Python docs (#27757)

Other changes

• Fix s390x stacker assembly in release builds (#27776)
• Guarantee minimum stack size when parsing a module, standalone expression, and suites (#25464)
• Reduce configuration deserialization code size (#27924)
• Check packed AST index bounds (#27849)

Contributors

• @​AbhinavMir
• @​eduardorittner
• @​royb3
• @​MichaReiser
• @​carljm
• @​rosstitmarsh
• @​ntBre

... (truncated)

Changelog

Sourced from ruff's changelog.

0.16.4

Released on 2026-08-20.

Preview features

• [flake8-use-pathlib] Add autofix for PTH116 (#26460)
• [refurb] Restrict delete-full-slice to lists (FURB131) (#27711)
• [refurb] Skip FURB101 and FURB103 when the open argument is a file descriptor (#27643)

Bug fixes

• Fix InvalidInstruction on Windows CPUs that do not support POPCNT (#27803)
• [pyflakes] Emit semantic syntax errors in string type definitions as F722 (#27835)
• [pylint] Allow os._exit imports in import-private-name (PLC2701) (#27738)

Rule changes

• [syntax-errors] Align mixed t-string/bytes error message with CPython 3.14 (#27766)
• [ruff] Add ctypes.LittleEndianStructure and related types to existing exception (RUF012) (#27753)
• [syntax-errors] Detect duplicate keyword arguments (#17804)
• [syntax-errors] Detect parameters declared nonlocal (#27628)

Server

• Offer display-only fixes and mark safe fixes preferred (#27807)
• Support pull diagnostics for notebook cells (#27779)

Documentation

• Add default indicator to rules table (#27724)
• Fix broken link to Python docs (#27757)

Other changes

• Fix s390x stacker assembly in release builds (#27776)
• Guarantee minimum stack size when parsing a module, standalone expression, and suites (#25464)
• Reduce configuration deserialization code size (#27924)
• Check packed AST index bounds (#27849)

Contributors

• @​AbhinavMir
• @​eduardorittner
• @​royb3
• @​MichaReiser
• @​carljm
• @​rosstitmarsh
• @​ntBre
• @​zaniebot

... (truncated)

Commits

• 11c76bf Bump 0.16.4 (#27937)
• d53c8c5 Isolate playground builds from deployment credentials (#27839)
• cab001e Disable uv preview for releases and pre-commit hooks (#27939)
• f8d575f [ty] Clarify writing guidance for human readers (#27912)
• ca45fae Set --preview and --default-index for the uv-lock hook (#27935)
• 4827bf7 Export UV_DEFAULT_INDEX in release.sh (#27934)
• d1087a4 [ty] Handle assignment expressions in string annotations (#27921)
• 680cce4 [ty] Optimize inherited recursive protocol comparisons (#27922)
• 974d3cb Upgrade ecosystem-analyzer and mypy_primer to the latest upstream pins (#27932)
• b169b40 Install cargo tools locked (#27929)
• Additional commits viewable in compare view