* main:
  [ty] make `test-case` a dev-dependency (#24187)
  [ty] implement cycle normalization for more types to prevent too-many-cycle panics (#24061)
  [ty] Silence all diagnostics in unreachable code (#24179)
  [ty] Intern `InferableTypeVars` (#24161)
  Implement unnecessary-if (RUF050) (#24114)
  Recognize `Self` annotation and `self` assignment in SLF001 (#24144)
  Bump the npm version before publish (#24178)
  [ty] Disallow Self in metaclass and static methods (#23231)
  Use trusted publishing for NPM packages (#24171)
  [ty] Respect non-explicitly defined dataclass params (#24170)
  Add RUF072: warn when using  operator on an f-string (#24162)
  [ty] Check return type of generator functions (#24026)
  Implement useless-finally (RUF-072) (#24165)
  [ty] Add test for a dataclass with a default field converter (#24169)
  [ty] Dataclass field converters (#23088)
  [flake8-bandit] Treat sys.executable as trusted input in S603 (#24106)
  [ty] Add support for `typing.Concatenate` (#23689)
  `ASYNC115`: autofix to use full qualified `anyio.lowlevel` import (#24166)
  [ty] Disallow read-only fields in TypedDict updates (#24128)
  Speed up diagnostic rendering (#24146)

##### [\`v0.15.8\`](https://github.com/astral-sh/ruff/blob/HEAD/CHANGELOG.md#0158)

Released on 2026-03-26.

##### Preview features

- \[`ruff`] New rule `unnecessary-if` (`RUF050`) ([#24114](astral-sh/ruff#24114))
- \[`ruff`] New rule `useless-finally` (`RUF072`) ([#24165](astral-sh/ruff#24165))
- \[`ruff`] New rule `f-string-percent-format` (`RUF073`): warn when using `%` operator on an f-string ([#24162](astral-sh/ruff#24162))
- \[`pyflakes`] Recognize `frozendict` as a builtin for Python 3.15+ ([#24100](astral-sh/ruff#24100))

##### Bug fixes

- \[`flake8-async`] Use fully-qualified `anyio.lowlevel` import in autofix (`ASYNC115`) ([#24166](astral-sh/ruff#24166))
- \[`flake8-bandit`] Check tuple arguments for partial paths in `S607` ([#24080](astral-sh/ruff#24080))
- \[`pyflakes`] Skip `undefined-name` (`F821`) for conditionally deleted variables ([#24088](astral-sh/ruff#24088))
- `E501`/`W505`/formatter: Exclude nested pragma comments from line width calculation ([#24071](astral-sh/ruff#24071))
- Fix `%foo?` parsing in IPython assignment expressions ([#24152](astral-sh/ruff#24152))
- `analyze graph`: resolve string imports that reference attributes, not just modules ([#24058](astral-sh/ruff#24058))

##### Rule changes

- \[`eradicate`] ignore `ty: ignore` comments in `ERA001` ([#24192](astral-sh/ruff#24192))
- \[`flake8-bandit`] Treat `sys.executable` as trusted input in `S603` ([#24106](astral-sh/ruff#24106))
- \[`flake8-self`] Recognize `Self` annotation and `self` assignment in `SLF001` ([#24144](astral-sh/ruff#24144))
- \[`pyflakes`] `F507`: Fix false negative for non-tuple RHS in `%`-formatting ([#24142](astral-sh/ruff#24142))
- \[`refurb`] Parenthesize generator arguments in `FURB142` fixer ([#24200](astral-sh/ruff#24200))

##### Performance

- Speed up diagnostic rendering ([#24146](astral-sh/ruff#24146))

##### Server

- Warn when Markdown files are skipped due to preview being disabled ([#24150](astral-sh/ruff#24150))

##### Documentation

- Clarify `extend-ignore` and `extend-select` settings documentation ([#24064](astral-sh/ruff#24064))
- Mention AI policy in PR template ([#24198](astral-sh/ruff#24198))

##### Other changes

- Use trusted publishing for NPM packages ([#24171](astral-sh/ruff#24171))

##### Contributors

- [@bitloi](https://github.com/bitloi)
- [@Sim-hu](https://github.com/Sim-hu)
- [@mvanhorn](https://github.com/mvanhorn)
- [@chinar-amrutkar](https://github.com/chinar-amrutkar)
- [@markjm](https://github.com/markjm)
- [@RenzoMXD](https://github.com/RenzoMXD)
- [@vivekkhimani](https://github.com/vivekkhimani)
- [@seroperson](https://github.com/seroperson)
- [@moktamd](https://github.com/moktamd)
- [@charliermarsh](https://github.com/charliermarsh)
- [@ntBre](https://github.com/ntBre)
- [@zanieb](https://github.com/zanieb)
- [@dylwil3](https://github.com/dylwil3)
- [@MichaReiser](https://github.com/MichaReiser)

Renovate-Branch: renovate/2024.6-ruff-0.15.x
Change-Id: Ifd4216a963962ffb24a4df69802bc60fcc29628d
Priv-Id: 46d2f61be3a5e65a9fdd2fef998ba41ea3388f12