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[airflow] Third positional parameter not named ti_key should be flagged for BaseOperatorLink.get_link (AIR303)#22828

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ntBre merged 5 commits intoastral-sh:mainfrom
sjyangkevin:air303-BaseOperatorLink-get_link
Feb 6, 2026
Merged

[airflow] Third positional parameter not named ti_key should be flagged for BaseOperatorLink.get_link (AIR303)#22828
ntBre merged 5 commits intoastral-sh:mainfrom
sjyangkevin:air303-BaseOperatorLink-get_link

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Summary

Context:
apache/airflow#41641
apache/airflow#46415

In the old signature, dttm is used by Airflow as a positional argument, so the argument name in the function declaration may not be dttm. In the new signature, however, the argument name must be ti_key (although it may be non-keyword-only; self, operator, ti_key should be considered new signature). So the deprecated signature detection rule should be exactly three positional arguments, the third one not named ti_key.

Old Signature

class MyOperatorLink(BaseOperatorLink):
    def get_link(self, operator, dttm):
        ...

New Signature

class MyOperatorLink(BaseOperatorLink):
    def get_link(self, operator, *, ti_key):
        ...

This PR extends AIR303 to detect deprecated get_link method signatures in BaseOperatorLink subclasses, which is a method definition. BaseOperatorLink is a base class can be extended by the user, and the get_link method is called by Airflow. As the way Airflow internally call this method change, we need to flag the user's implementation if the method definition is not match with the new signature (@Lee-W , please correct me if I understand it wrong, whenever you have time, thanks). The rule detects deprecated signatures where:

  1. The class inherits from BaseOperatorLink (from airflow.models or airflow.sdk)
  2. The method is named get_link
  3. There are exactly 3 positional parameters
  4. The 3rd parameter is not named as ti_key
Screenshot from 2026-01-23 22-25-34

Test Plan

The test cases are added to AIR303.py and the test snapshot is updated.

Comment on lines +55 to +60
#[derive(Clone, Debug, Eq, PartialEq)]
pub(crate) enum FunctionSignatureChange {
/// Carries a message describing the function signature change.
Message(&'static str),
}

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The original definition in function_signature_change_in_3.rs becomes redundant as these enum items only encapsulate a message. Therefore, combine these into a single Message item, and move it to helpers.rs. This enum will be dedicated used for AIR303, or function signature change in future version of Airflow.

#[derive(Clone, Debug, Eq, PartialEq)]
pub(crate) enum FunctionSignatureChangeType {
    /// Function signature changed to only accept keyword arguments.
    KeywordOnly { message: &'static str },
    /// Function signature changed to not accept certain positional arguments.
    PositionalArgumentChange { message: &'static str },
}

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I'm totally fine with this change if y'all prefer it, but I think it would also be fine to keep the old version if you think you'll want to differentiate between the variants later. You could always add a message method to avoid having to destructure the enum everywhere you use it. For example:

impl FunctionSignatureChangeType {
    fn message(&self) -> &'static str {
        match self {
            Self::KeywordOnly { message } | Self::PositionalArgumentChange { message } => message,
        }
    }
}

Alternatively, I think you could just use a &'static str for the message field instead of having this enum type at all?


/// This is a helper function to check if the given function definition is a method
/// that inherits from a base class.
pub(crate) fn is_method_in_subclass<F>(
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This helper function generalizes the function is_execute_method_inherits_from_airflow_operator defined in the removal_in_3.rs. The function is checking if a subclass of airflow's BaseOperator implements a execute function. In AIR303, we need to check if a subclass of airflow's BaseOperatorLink implements a get_link function. Therefore, this is something reusable across multiple rules. I parameterized the method name and the match condition, to reduce redundant definition for similar checks.

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Nice, I like this! One nit, it might make sense to have the Fn type take a &QualifiedName instead of the less type-safe &[&str]. Just an idea, though.

Comment thread crates/ruff_linter/src/rules/airflow/rules/function_signature_change_in_3.rs Outdated
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astral-sh-bot Bot commented Jan 24, 2026

ruff-ecosystem results

Linter (stable)

✅ ecosystem check detected no linter changes.

Linter (preview)

✅ ecosystem check detected no linter changes.

Comment thread crates/ruff_linter/resources/test/fixtures/airflow/AIR303.py
@sjyangkevin sjyangkevin force-pushed the air303-BaseOperatorLink-get_link branch from 2c7f7d2 to 78dccc5 Compare January 28, 2026 04:56
Comment on lines +117 to +141
let is_valid_signature = match positional_count {
// check valid signature `def get_link(self, operator, *, ti_key)`
2 => parameters
.kwonlyargs
.iter()
.any(|p| p.name().as_str() == "ti_key"),
// check valid signature `def get_link(self, operator, ti_key)`
3 => parameters
.posonlyargs
.iter()
.chain(parameters.args.iter())
.nth(2)
.is_some_and(|p| p.name().as_str() == "ti_key"),
_ => false,
};

if !is_valid_signature {
checker.report_diagnostic(
Airflow3IncompatibleFunctionSignature {
function_name: "get_link".to_string(),
change: FunctionSignatureChange::Message(
"Use `def get_link(self, operator, *, ti_key)` or `def get_link(self, operator, ti_key)` as the method signature.",
),
},
function_def.name.range(),
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@sjyangkevin sjyangkevin Jan 28, 2026

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updated the logic to check for valid signature pattern, which is either def get_link(self, operator, *, ti_key) or ``def get_link(self, operator, ti_key)`, and the diagnostic will be raised when the method signature is evaluated to invalid.

The name of the first two positional parameters doesn't matter for the rule. If there are 2 positional parameters (i.e., self, operator), check if the keyword-only parameter is named ti_key. If there are 3 positional parameters, check if the third one is named ti_key.

The message and test cases are updated accordingly.

@sjyangkevin sjyangkevin requested a review from Lee-W January 28, 2026 05:04
@ntBre ntBre added rule Implementing or modifying a lint rule preview Related to preview mode features labels Jan 28, 2026
let positional_count = parameters.posonlyargs.len() + parameters.args.len();

let is_valid_signature = match positional_count {
// check valid signature `def get_link(self, operator, *, ti_key)`
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what would happen if we use def get_link(self, operator, ti_key)

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In this case, I think we have 3 positional parameters, and it will not match the first condition which check if the number of positional parameters is 2. It will proceed to the next condition and check if there are 3 positional parameters and iterate through it see if the 3rd one is named ti_key. I’ve added a test case for this but will also do a double check. Thanks!

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Thanks!

@sjyangkevin sjyangkevin force-pushed the air303-BaseOperatorLink-get_link branch from 1177bca to 20daae9 Compare February 3, 2026 04:51
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Hi @Lee-W , @ntBre , I've added some more test cases for the new rule. I wonder if you can have a look when you get chance, and would appreciate if you have any feedback on the implementation for checking function signature. Thanks!

@sjyangkevin sjyangkevin requested a review from Lee-W February 3, 2026 04:59
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Thank you! This looks good to me if @Lee-W is happy with it. I just had a couple of small suggestions for your consideration.

Comment thread crates/ruff_linter/src/rules/airflow/helpers.rs Outdated

/// This is a helper function to check if the given function definition is a method
/// that inherits from a base class.
pub(crate) fn is_method_in_subclass<F>(
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Nice, I like this! One nit, it might make sense to have the Fn type take a &QualifiedName instead of the less type-safe &[&str]. Just an idea, though.

Comment on lines +55 to +60
#[derive(Clone, Debug, Eq, PartialEq)]
pub(crate) enum FunctionSignatureChange {
/// Carries a message describing the function signature change.
Message(&'static str),
}

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I'm totally fine with this change if y'all prefer it, but I think it would also be fine to keep the old version if you think you'll want to differentiate between the variants later. You could always add a message method to avoid having to destructure the enum everywhere you use it. For example:

impl FunctionSignatureChangeType {
    fn message(&self) -> &'static str {
        match self {
            Self::KeywordOnly { message } | Self::PositionalArgumentChange { message } => message,
        }
    }
}

Alternatively, I think you could just use a &'static str for the message field instead of having this enum type at all?

@sjyangkevin sjyangkevin force-pushed the air303-BaseOperatorLink-get_link branch from 20daae9 to c11b27c Compare February 5, 2026 05:10
Comment on lines +281 to +291
F: Fn(QualifiedName) -> bool,
{
if function_def.name.as_str() != method_name {
return false;
}

let ScopeKind::Class(class_def) = semantic.current_scope().kind else {
return false;
};

any_qualified_base_class(class_def, semantic, &is_base_class)
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updated the helper to let Fn type take QualifiedName instead of &[&str], and use any_qualified_base_class for base class check. I got help from AI tool for it, wonder if it is the proper way to implement, still try to understand it.

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That looks great!

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Just checked the code and comments again. LGTM. Thanks!

@ntBre ntBre merged commit c2ffad5 into astral-sh:main Feb 6, 2026
41 checks passed
nicopauss pushed a commit to Intersec/lib-common that referenced this pull request Apr 1, 2026
Released on 2026-03-19.

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- [@carljm](https://github.com/carljm)
- [@anishgirianish](https://github.com/anishgirianish)
- [@Bnyro](https://github.com/Bnyro)
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- [@jaap3](https://github.com/jaap3)
- [@stakeswky](https://github.com/stakeswky)

Released on 2026-02-19.

- Expand the default rule set ([#23385](astral-sh/ruff#23385))

  In preview, Ruff now enables a significantly expanded default rule set of 412
  rules, up from the stable default set of 59 rules. The new rules are mostly a
  superset of the stable defaults, with the exception of these rules, which are
  removed from the preview defaults:

  - [`multiple-imports-on-one-line`](https://docs.astral.sh/ruff/rules/multiple-imports-on-one-line) (`E401`)
  - [`module-import-not-at-top-of-file`](https://docs.astral.sh/ruff/rules/module-import-not-at-top-of-file) (`E402`)
  - [`module-import-not-at-top-of-file`](https://docs.astral.sh/ruff/rules/module-import-not-at-top-of-file) (`E701`)
  - [`multiple-statements-on-one-line-semicolon`](https://docs.astral.sh/ruff/rules/multiple-statements-on-one-line-semicolon) (`E702`)
  - [`useless-semicolon`](https://docs.astral.sh/ruff/rules/useless-semicolon) (`E703`)
  - [`none-comparison`](https://docs.astral.sh/ruff/rules/none-comparison) (`E711`)
  - [`true-false-comparison`](https://docs.astral.sh/ruff/rules/true-false-comparison) (`E712`)
  - [`not-in-test`](https://docs.astral.sh/ruff/rules/not-in-test) (`E713`)
  - [`not-is-test`](https://docs.astral.sh/ruff/rules/not-is-test) (`E714`)
  - [`type-comparison`](https://docs.astral.sh/ruff/rules/type-comparison) (`E721`)
  - [`lambda-assignment`](https://docs.astral.sh/ruff/rules/lambda-assignment) (`E731`)
  - [`ambiguous-variable-name`](https://docs.astral.sh/ruff/rules/ambiguous-variable-name) (`E741`)
  - [`ambiguous-class-name`](https://docs.astral.sh/ruff/rules/ambiguous-class-name) (`E742`)
  - [`ambiguous-function-name`](https://docs.astral.sh/ruff/rules/ambiguous-function-name) (`E743`)
  - [`undefined-local-with-import-star`](https://docs.astral.sh/ruff/rules/undefined-local-with-import-star) (`F403`)
  - [`undefined-local-with-import-star-usage`](https://docs.astral.sh/ruff/rules/undefined-local-with-import-star-usage) (`F405`)
  - [`undefined-local-with-nested-import-star-usage`](https://docs.astral.sh/ruff/rules/undefined-local-with-nested-import-star-usage) (`F406`)
  - [`forward-annotation-syntax-error`](https://docs.astral.sh/ruff/rules/forward-annotation-syntax-error) (`F722`)

  If you use preview and prefer the old defaults, you can restore them with
  configuration like:

  ```toml

  # ruff.toml

  [lint]
  select = ["E4", "E7", "E9", "F"]

  # pyproject.toml

  [tool.ruff.lint]
  select = ["E4", "E7", "E9", "F"]
  ```

  If you do give them a try, feel free to share your feedback in the [GitHub
  discussion](astral-sh/ruff#23203)!

- \[`flake8-pyi`] Also check string annotations (`PYI041`) ([#19023](astral-sh/ruff#19023))

- \[`flake8-async`] Fix `in_async_context` logic ([#23426](astral-sh/ruff#23426))
- \[`ruff`] Fix for `RUF102` should delete entire comment ([#23380](astral-sh/ruff#23380))
- \[`ruff`] Suppress diagnostic for strings with backslashes in interpolations before Python 3.12 (`RUF027`) ([#21069](astral-sh/ruff#21069))
- \[`flake8-bugbear`] Fix `B023` false positive for immediately-invoked lambdas ([#23294](astral-sh/ruff#23294))
- \[parser] Fix false syntax error for match-like annotated assignments ([#23297](astral-sh/ruff#23297))
- \[parser] Fix indentation tracking after line continuations ([#23417](astral-sh/ruff#23417))

- \[`flake8-executable`] Allow global flags in uv shebangs (`EXE003`) ([#22582](astral-sh/ruff#22582))
- \[`pyupgrade`] Fix handling of `typing.{io,re}` (`UP035`) ([#23131](astral-sh/ruff#23131))
- \[`ruff`] Detect `PLC0207` on chained `str.split()` calls ([#23275](astral-sh/ruff#23275))

- Remove invalid inline `noqa` warning ([#23270](astral-sh/ruff#23270))

- Add extension mapping to configuration file options ([#23384](astral-sh/ruff#23384))

- Add `Q004` to the list of conflicting rules ([#23340](astral-sh/ruff#23340))
- \[`ruff`] Expand `lint.external` docs and add sub-diagnostic (`RUF100`, `RUF102`) ([#23268](astral-sh/ruff#23268))

- [@dylwil3](https://github.com/dylwil3)
- [@Jkhall81](https://github.com/Jkhall81)
- [@danparizher](https://github.com/danparizher)
- [@dhruvmanila](https://github.com/dhruvmanila)
- [@harupy](https://github.com/harupy)
- [@ngnpope](https://github.com/ngnpope)
- [@amyreese](https://github.com/amyreese)
- [@kar-ganap](https://github.com/kar-ganap)
- [@robsdedude](https://github.com/robsdedude)
- [@shaanmajid](https://github.com/shaanmajid)
- [@ntBre](https://github.com/ntBre)
- [@toslunar](https://github.com/toslunar)

Released on 2026-02-12.

- \[`airflow`] Add ruff rules to catch deprecated Airflow imports for Airflow 3.1 (`AIR321`) ([#22376](astral-sh/ruff#22376))
- \[`airflow`] Third positional parameter not named `ti_key` should be flagged for `BaseOperatorLink.get_link` (`AIR303`) ([#22828](astral-sh/ruff#22828))
- \[`flake8-gettext`] Fix false negatives for plural argument of `ngettext` (`INT001`, `INT002`, `INT003`) ([#21078](astral-sh/ruff#21078))
- \[`pyflakes`] Fix infinite loop in preview fix for `unused-import` (`F401`) ([#23038](astral-sh/ruff#23038))
- \[`pygrep-hooks`] Detect non-existent mock methods in standalone expressions (`PGH005`) ([#22830](astral-sh/ruff#22830))
- \[`pylint`] Allow dunder submodules and improve diagnostic range (`PLC2701`) ([#22804](astral-sh/ruff#22804))
- \[`pyupgrade`] Improve diagnostic range for tuples (`UP024`) ([#23013](astral-sh/ruff#23013))
- \[`refurb`] Check subscripts in tuple do not use lambda parameters in `reimplemented-operator` (`FURB118`) ([#23079](astral-sh/ruff#23079))
- \[`ruff`] Detect mutable defaults in `field` calls (`RUF008`) ([#23046](astral-sh/ruff#23046))
- \[`ruff`] Ignore std `cmath.inf` (`RUF069`) ([#23120](astral-sh/ruff#23120))
- \[`ruff`] New rule `float-equality-comparison` (`RUF069`) ([#20585](astral-sh/ruff#20585))
- Don't format unlabeled Markdown code blocks ([#23106](astral-sh/ruff#23106))
- Markdown formatting support in LSP ([#23063](astral-sh/ruff#23063))
- Support Quarto Markdown language markers ([#22947](astral-sh/ruff#22947))
- Support formatting `pycon` Markdown code blocks ([#23112](astral-sh/ruff#23112))
- Use extension mapping to select Markdown code block language ([#22934](astral-sh/ruff#22934))

- Avoid false positive for undefined variables in `FAST001` ([#23224](astral-sh/ruff#23224))
- Avoid introducing syntax errors for `FAST003` autofix ([#23227](astral-sh/ruff#23227))
- Avoid suggesting `InitVar` for `__post_init__` that references PEP 695 type parameters ([#23226](astral-sh/ruff#23226))
- Deduplicate type variables in generic functions ([#23225](astral-sh/ruff#23225))
- Fix exception handler parenthesis removal for Python 3.14+ ([#23126](astral-sh/ruff#23126))
- Fix f-string middle panic when parsing t-strings ([#23232](astral-sh/ruff#23232))
- Wrap `RUF020` target for multiline fixes ([#23210](astral-sh/ruff#23210))
- Wrap `UP007` target for multiline fixes ([#23208](astral-sh/ruff#23208))
- Fix missing diagnostics for last range suppression in file ([#23242](astral-sh/ruff#23242))
- \[`pyupgrade`] Fix syntax error on string with newline escape and comment (`UP037`) ([#22968](astral-sh/ruff#22968))

- Use `ruff` instead of `Ruff` as the program name in GitHub output format ([#23240](astral-sh/ruff#23240))
- \[`PT006`] Fix syntax error when unpacking nested tuples in `parametrize` fixes ([#22441](astral-sh/ruff#22441)) ([#22464](astral-sh/ruff#22464))
- \[`airflow`] Catch deprecated attribute access from context key for Airflow 3.0 (`AIR301`) ([#22850](astral-sh/ruff#22850))
- \[`airflow`] Capture deprecated arguments and a decorator (`AIR301`) ([#23170](astral-sh/ruff#23170))
- \[`flake8-boolean-trap`] Add `multiprocessing.Value` to excluded functions for `FBT003` ([#23010](astral-sh/ruff#23010))
- \[`flake8-bugbear`] Add a secondary annotation showing the previous occurrence (`B033`) ([#22634](astral-sh/ruff#22634))
- \[`flake8-type-checking`] Add sub-diagnostic showing the runtime use of an annotation (`TC004`) ([#23091](astral-sh/ruff#23091))
- \[`isort`] Support configurable import section heading comments ([#23151](astral-sh/ruff#23151))
- \[`ruff`] Improve the diagnostic for `RUF012` ([#23202](astral-sh/ruff#23202))

- Suppress diagnostic output for `format --check --silent` ([#17736](astral-sh/ruff#17736))

- Add tabbed shell completion documentation ([#23169](astral-sh/ruff#23169))
- Explain how to enable Markdown formatting for pre-commit hook ([#23077](astral-sh/ruff#23077))
- Fixed import in `runtime-evaluated-decorators` example ([#23187](astral-sh/ruff#23187))
- Update ruff server contributing guide ([#23060](astral-sh/ruff#23060))

- Exclude WASM artifacts from GitHub releases ([#23221](astral-sh/ruff#23221))

- [@mkniewallner](https://github.com/mkniewallner)
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- [@sjyangkevin](https://github.com/sjyangkevin)

Released on 2026-02-03.

Check out the [blog post](https://astral.sh/blog/ruff-v0.15.0) for a migration
guide and overview of the changes!

- Ruff now formats your code according to the 2026 style guide. See the formatter section below or in the blog post for a detailed list of changes.

- The linter now supports block suppression comments. For example, to suppress `N803` for all parameters in this function:

  ```python
  # ruff: disable[N803]
  def foo(
      legacyArg1,
      legacyArg2,
      legacyArg3,
      legacyArg4,
  ): ...
  # ruff: enable[N803]
  ```

  See the [documentation](https://docs.astral.sh/ruff/linter/#block-level) for more details.

- The `ruff:alpine` Docker image is now based on Alpine 3.23 (up from 3.21).

- The `ruff:debian` and `ruff:debian-slim` Docker images are now based on Debian 13 "Trixie" instead of Debian 12 "Bookworm."

- Binaries for the `ppc64` (64-bit big-endian PowerPC) architecture are no longer included in our releases. It should still be possible to build Ruff manually for this platform, if needed.

- Ruff now resolves all `extend`ed configuration files before falling back on a default Python version.

The following rules have been stabilized and are no longer in preview:

- [`blocking-http-call-httpx-in-async-function`](https://docs.astral.sh/ruff/rules/blocking-http-call-httpx-in-async-function)
  (`ASYNC212`)
- [`blocking-path-method-in-async-function`](https://docs.astral.sh/ruff/rules/blocking-path-method-in-async-function)
  (`ASYNC240`)
- [`blocking-input-in-async-function`](https://docs.astral.sh/ruff/rules/blocking-input-in-async-function)
  (`ASYNC250`)
- [`map-without-explicit-strict`](https://docs.astral.sh/ruff/rules/map-without-explicit-strict)
  (`B912`)
- [`if-exp-instead-of-or-operator`](https://docs.astral.sh/ruff/rules/if-exp-instead-of-or-operator)
  (`FURB110`)
- [`single-item-membership-test`](https://docs.astral.sh/ruff/rules/single-item-membership-test)
  (`FURB171`)
- [`missing-maxsplit-arg`](https://docs.astral.sh/ruff/rules/missing-maxsplit-arg) (`PLC0207`)
- [`unnecessary-lambda`](https://docs.astral.sh/ruff/rules/unnecessary-lambda) (`PLW0108`)
- [`unnecessary-empty-iterable-within-deque-call`](https://docs.astral.sh/ruff/rules/unnecessary-empty-iterable-within-deque-call)
  (`RUF037`)
- [`in-empty-collection`](https://docs.astral.sh/ruff/rules/in-empty-collection) (`RUF060`)
- [`legacy-form-pytest-raises`](https://docs.astral.sh/ruff/rules/legacy-form-pytest-raises)
  (`RUF061`)
- [`non-octal-permissions`](https://docs.astral.sh/ruff/rules/non-octal-permissions) (`RUF064`)
- [`invalid-rule-code`](https://docs.astral.sh/ruff/rules/invalid-rule-code) (`RUF102`)
- [`invalid-suppression-comment`](https://docs.astral.sh/ruff/rules/invalid-suppression-comment)
  (`RUF103`)
- [`unmatched-suppression-comment`](https://docs.astral.sh/ruff/rules/unmatched-suppression-comment)
  (`RUF104`)
- [`replace-str-enum`](https://docs.astral.sh/ruff/rules/replace-str-enum) (`UP042`)

The following behaviors have been stabilized:

- The `--output-format` flag is now respected when running Ruff in `--watch` mode, and the `full` output format is now used by default, matching the regular CLI output.
- [`builtin-attribute-shadowing`](https://docs.astral.sh/ruff/rules/builtin-attribute-shadowing/) (`A003`) now detects the use of shadowed built-in names in additional contexts like decorators, default arguments, and other attribute definitions.
- [`duplicate-union-member`](https://docs.astral.sh/ruff/rules/duplicate-union-member/) (`PYI016`) now considers `typing.Optional` when searching for duplicate union members.
- [`split-static-string`](https://docs.astral.sh/ruff/rules/split-static-string/) (`SIM905`) now offers an autofix when the `maxsplit` argument is provided, even without a `sep` argument.
- [`dict-get-with-none-default`](https://docs.astral.sh/ruff/rules/dict-get-with-none-default/) (`SIM910`) now applies to more types of key expressions.
- [`super-call-with-parameters`](https://docs.astral.sh/ruff/rules/super-call-with-parameters/) (`UP008`) now has a safe fix when it will not delete comments.
- [`unnecessary-default-type-args`](https://docs.astral.sh/ruff/rules/unnecessary-default-type-args/) (`UP043`) now applies to stub (`.pyi`) files on Python versions before 3.13.

This release introduces the new 2026 style guide, with the following changes:

- Lambda parameters are now kept on the same line and lambda bodies will be parenthesized to let
  them break across multiple lines ([#21385](astral-sh/ruff#21385))
- Parentheses around tuples of exceptions in `except` clauses will now be removed on Python 3.14 and
  later ([#20768](astral-sh/ruff#20768))
- A single empty line is now permitted at the beginning of function bodies ([#21110](astral-sh/ruff#21110))
- Parentheses are avoided for long `as` captures in `match` statements ([#21176](astral-sh/ruff#21176))
- Extra spaces between escaped quotes and ending triple quotes can now be omitted ([#17216](astral-sh/ruff#17216))
- Blank lines are now enforced before classes with decorators in stub files ([#18888](astral-sh/ruff#18888))

- Apply formatting to Markdown code blocks ([#22470](astral-sh/ruff#22470), [#22990](astral-sh/ruff#22990), [#22996](astral-sh/ruff#22996))

  See the [documentation](https://docs.astral.sh/ruff/formatter/#markdown-code-formatting) for more details.

- Fix suppression indentation matching ([#22903](astral-sh/ruff#22903))

- Customize where the `fix_title` sub-diagnostic appears ([#23044](astral-sh/ruff#23044))
- \[`FastAPI`] Add sub-diagnostic explaining why a fix was unavailable (`FAST002`) ([#22565](astral-sh/ruff#22565))
- \[`flake8-annotations`] Don't suggest `NoReturn` for functions raising `NotImplementedError` (`ANN201`, `ANN202`, `ANN205`, `ANN206`) ([#21311](astral-sh/ruff#21311))
- \[`pyupgrade`] Make fix unsafe if it deletes comments (`UP017`) ([#22873](astral-sh/ruff#22873))
- \[`pyupgrade`] Make fix unsafe if it deletes comments (`UP020`) ([#22872](astral-sh/ruff#22872))
- \[`pyupgrade`] Make fix unsafe if it deletes comments (`UP033`) ([#22871](astral-sh/ruff#22871))
- \[`refurb`] Do not add `abc.ABC` if already present (`FURB180`) ([#22234](astral-sh/ruff#22234))
- \[`refurb`] Make fix unsafe if it deletes comments (`FURB110`) ([#22768](astral-sh/ruff#22768))
- \[`ruff`] Add sub-diagnostics with permissions (`RUF064`) ([#22972](astral-sh/ruff#22972))

- Identify notebooks by LSP `didOpen` instead of `.ipynb` file extension ([#22810](astral-sh/ruff#22810))

- Add `--color` CLI option to force colored output ([#22806](astral-sh/ruff#22806))

- Document `-` stdin convention in CLI help text ([#22817](astral-sh/ruff#22817))
- \[`refurb`] Change example to `re.search` with `^` anchor (`FURB167`) ([#22984](astral-sh/ruff#22984))
- Fix link to Sphinx code block directives ([#23041](astral-sh/ruff#23041))
- \[`pydocstyle`] Clarify which quote styles are allowed (`D300`) ([#22825](astral-sh/ruff#22825))
- \[`flake8-bugbear`] Improve docs for `no-explicit-stacklevel` (`B028`) ([#22538](astral-sh/ruff#22538))

- Update MSRV to 1.91 ([#22874](astral-sh/ruff#22874))

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Renovate-Branch: renovate/2024.6-ruff-0.x
Change-Id: I8f8e865435fde1fc736fe2528261a604acb46215
Priv-Id: f7e1d99008e3617149c4b639a9a2bbc06212d064
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