Bump version to 0.0.202

Set editor background on top-level component (#1478 )
Use more precise ranges for class and function checks (#1476 )
2022-12-30 08:16:32 -05:00 · 2022-12-30 07:55:54 -05:00 · 2022-12-30 07:39:20 -05:00 · 2022-12-30 07:16:44 -05:00 · 2022-12-30 07:13:48 -05:00 · 2022-12-30 07:13:48 -05:00
117 changed files with 4933 additions and 1167 deletions
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
  - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.199
+    rev: v0.0.202
    hooks:
      - id: ruff

--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -66,11 +66,13 @@ understand how other, similar rules are implemented.
 To add a test fixture, create a file under `resources/test/fixtures`, named to match the `CheckCode`
 you defined earlier (e.g., `E402.py`). This file should contain a variety of violations and
 non-violations designed to evaluate and demonstrate the behavior of your lint rule. Run Ruff locally
-with (e.g.) `cargo run resources/test/fixtures/E402.py --no-cache`. Once you're satisfied with the
+with (e.g.) `cargo run resources/test/fixtures/E402.py --no-cache --select E402`. Once you're satisfied with the
 output, codify the behavior as a snapshot test by adding a new `testcase` macro to the `mod tests`
 section of `src/linter.rs`, like so:

 ```rust
+use test_case::test_case;
+
 #[test_case(CheckCode::A001, Path::new("A001.py"); "A001")]
 ...
 ```
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -750,7 +750,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8-to-ruff"
-version = "0.0.199-dev.0"
+version = "0.0.202-dev.0"
 dependencies = [
 "anyhow",
 "clap 4.0.32",
@@ -1878,7 +1878,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.199"
+version = "0.0.202"
 dependencies = [
 "annotate-snippets 0.9.1",
 "anyhow",
@@ -1946,7 +1946,7 @@ dependencies = [

 [[package]]
 name = "ruff_dev"
-version = "0.0.199"
+version = "0.0.202"
 dependencies = [
 "anyhow",
 "clap 4.0.32",
@@ -1967,7 +1967,7 @@ dependencies = [

 [[package]]
 name = "ruff_macros"
-version = "0.0.199"
+version = "0.0.202"
 dependencies = [
 "proc-macro2",
 "quote",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ members = [

 [package]
 name = "ruff"
-version = "0.0.199"
+version = "0.0.202"
 authors = ["Charlie Marsh <charlie.r.marsh@gmail.com>"]
 edition = "2021"
 rust-version = "1.65.0"
@@ -51,7 +51,7 @@ path-absolutize = { version = "3.0.14", features = ["once_cell_cache", "use_unix
 quick-junit = { version = "0.3.2" }
 regex = { version = "1.6.0" }
 ropey = { version = "1.5.0", features = ["cr_lines", "simd"], default-features = false }
-ruff_macros = { version = "0.0.199", path = "ruff_macros" }
+ruff_macros = { version = "0.0.202", path = "ruff_macros" }
 rustc-hash = { version = "1.1.0" }
 rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
 rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "68d26955b3e24198a150315e7959719b03709dee" }
--- a/25
+++ b/25
@@ -388,6 +388,31 @@ are:
    SOFTWARE.
  """

+- flake8-implicit-str-concat, licensed as follows:
+  """
+    The MIT License (MIT)
+
+    Copyright (c) 2019 Dylan Turner
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+  """
+
 - flake8-import-conventions, licensed as follows:
  """
    MIT License
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@ Ruff is extremely actively developed and used in major open-source projects like
 - [Bokeh](https://github.com/bokeh/bokeh)
 - [Zulip](https://github.com/zulip/zulip)
 - [Pydantic](https://github.com/pydantic/pydantic)
+- [Sphinx](https://github.com/sphinx-doc/sphinx)
 - [Hatch](https://github.com/pypa/hatch)
 - [Jupyter](https://github.com/jupyter-server/jupyter_server)
 - [Synapse](https://github.com/matrix-org/synapse)
@@ -94,6 +95,7 @@ of [Conda](https://docs.conda.io/en/latest/):
   1. [flake8-comprehensions (C4)](#flake8-comprehensions-c4)
   1. [flake8-debugger (T10)](#flake8-debugger-t10)
   1. [flake8-errmsg (EM)](#flake8-errmsg-em)
+   1. [flake8-implicit-str-concat (ISC)](#flake8-implicit-str-concat-isc)
   1. [flake8-import-conventions (ICN)](#flake8-import-conventions-icn)
   1. [flake8-print (T20)](#flake8-print-t20)
   1. [flake8-quotes (Q)](#flake8-quotes-q)
@@ -167,7 +169,7 @@ Ruff also works with [pre-commit](https://pre-commit.com):
 ```yaml
 - repo: https://github.com/charliermarsh/ruff-pre-commit
  # Ruff version.
-  rev: 'v0.0.199'
+  rev: 'v0.0.202'
  hooks:
    - id: ruff
      # Respect `exclude` and `extend-exclude` settings.
@@ -328,11 +330,11 @@ Options:
  -n, --no-cache
          Disable cache reads
      --select <SELECT>
-          List of error codes to enable
+          Comma-separated list of error codes to enable (or ALL, to enable all checks)
      --extend-select <EXTEND_SELECT>
          Like --select, but adds additional error codes on top of the selected ones
      --ignore <IGNORE>
-          List of error codes to ignore
+          Comma-separated list of error codes to disable
      --extend-ignore <EXTEND_IGNORE>
          Like --ignore, but adds additional error codes on top of the ignored ones
      --exclude <EXCLUDE>
@@ -353,12 +355,14 @@ Options:
          Respect file exclusions via `.gitignore` and other standard ignore files
      --force-exclude
          Enforce exclusions, even for paths passed to Ruff directly on the command-line
+      --update-check
+          Enable or disable automatic update checks
      --show-files
          See the files Ruff will be run against with the current settings
      --show-settings
          See the settings Ruff will use to check a given Python file
      --add-noqa
-          Enable automatic additions of noqa directives to failing lines
+          Enable automatic additions of `noqa` directives to failing lines
      --dummy-variable-rgx <DUMMY_VARIABLE_RGX>
          Regular expression matching the name of dummy variables
      --target-version <TARGET_VERSION>
@@ -366,7 +370,7 @@ Options:
      --line-length <LINE_LENGTH>
          Set the line-length for length-associated checks and automatic formatting
      --max-complexity <MAX_COMPLEXITY>
-          Max McCabe complexity allowed for a function
+          Maximum McCabe complexity allowed for a given function
      --stdin-filename <STDIN_FILENAME>
          The name of the file when passing it through stdin
      --explain <EXPLAIN>
@@ -675,6 +679,7 @@ For more, see [pyupgrade](https://pypi.org/project/pyupgrade/3.2.0/) on PyPI.
 | UP021 | ReplaceUniversalNewlines | `universal_newlines` is deprecated, use `text` | 🛠 |
 | UP022 | ReplaceStdoutStderr | Sending stdout and stderr to pipe is deprecated, use `capture_output` | 🛠 |
 | UP023 | RewriteCElementTree | `cElementTree` is deprecated, use `ElementTree` | 🛠 |
+| UP025 | RewriteUnicodeLiteral | Remove unicode literals from strings | 🛠 |

 ### pep8-naming (N)

@@ -850,6 +855,16 @@ For more, see [flake8-errmsg](https://pypi.org/project/flake8-errmsg/0.4.0/) on
 | EM102 | FStringInException | Exception must not use an f-string literal, assign to variable first |  |
 | EM103 | DotFormatInException | Exception must not use a `.format()` string directly, assign to variable first |  |

+### flake8-implicit-str-concat (ISC)
+
+For more, see [flake8-implicit-str-concat](https://pypi.org/project/flake8-implicit-str-concat/0.3.0/) on PyPI.
+
+| Code | Name | Message | Fix |
+| ---- | ---- | ------- | --- |
+| ISC001 | SingleLineImplicitStringConcatenation | Implicitly concatenated string literals on one line |  |
+| ISC002 | MultiLineImplicitStringConcatenation | Implicitly concatenated string literals over continuation line |  |
+| ISC003 | ExplicitStringConcatenation | Explicitly concatenated string should be implicitly concatenated |  |
+
 ### flake8-import-conventions (ICN)

 | Code | Name | Message | Fix |
@@ -905,6 +920,7 @@ For more, see [flake8-tidy-imports](https://pypi.org/project/flake8-tidy-imports

 | Code | Name | Message | Fix |
 | ---- | ---- | ------- | --- |
+| TID251 | BannedApi | `...` is banned: ... |  |
 | TID252 | BannedRelativeImport | Relative imports are banned |  |

 ### flake8-unused-arguments (ARG)
@@ -971,6 +987,7 @@ For more, see [pygrep-hooks](https://github.com/pre-commit/pygrep-hooks) on GitH
 | PGH001 | NoEval | No builtin `eval()` allowed |  |
 | PGH002 | DeprecatedLogWarn | `warn` is deprecated in favor of `warning` |  |
 | PGH003 | BlanketTypeIgnore | Use specific error codes when ignoring type issues |  |
+| PGH004 | BlanketNOQA | Use specific error codes when using `noqa` |  |

 ### Pylint (PLC, PLE, PLR, PLW)

@@ -1268,10 +1285,12 @@ natively, including:
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-eradicate`](https://pypi.org/project/flake8-eradicate/)
 - [`flake8-errmsg`](https://pypi.org/project/flake8-errmsg/)
+- [`flake8-implicit-str-concat`](https://pypi.org/project/flake8-implicit-str-concat/)
 - [`flake8-import-conventions`](https://github.com/joaopalmeiro/flake8-import-conventions)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
 - [`flake8-return`](https://pypi.org/project/flake8-return/)
+- [`flake8-simplify`](https://pypi.org/project/flake8-simplify/) (1/37)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-tidy-imports`](https://pypi.org/project/flake8-tidy-imports/) (1/3)
 - [`isort`](https://pypi.org/project/isort/)
@@ -1323,10 +1342,12 @@ Today, Ruff can be used to replace Flake8 when used with any of the following pl
 - [`flake8-docstrings`](https://pypi.org/project/flake8-docstrings/)
 - [`flake8-eradicate`](https://pypi.org/project/flake8-eradicate/)
 - [`flake8-errmsg`](https://pypi.org/project/flake8-errmsg/)
+- [`flake8-implicit-str-concat`](https://pypi.org/project/flake8-implicit-str-concat/)
 - [`flake8-import-conventions`](https://github.com/joaopalmeiro/flake8-import-conventions)
 - [`flake8-print`](https://pypi.org/project/flake8-print/)
 - [`flake8-quotes`](https://pypi.org/project/flake8-quotes/)
 - [`flake8-return`](https://pypi.org/project/flake8-return/)
+- [`flake8-simplify`](https://pypi.org/project/flake8-simplify/) (1/37)
 - [`flake8-super`](https://pypi.org/project/flake8-super/)
 - [`flake8-tidy-imports`](https://pypi.org/project/flake8-tidy-imports/) (1/3)
 - [`mccabe`](https://pypi.org/project/mccabe/)
@@ -2197,6 +2218,24 @@ unfixable = ["F401"]

 ---

+#### [`update-check`](#update-check)
+
+Enable or disable automatic update checks (overridden by the
+`--update-check` and `--no-update-check` command-line flags).
+
+**Default value**: `true`
+
+**Type**: `bool`
+
+**Example usage**:
+
+```toml
+[tool.ruff]
+update-check = false
+```
+
+---
+
 ### `flake8-annotations`

 #### [`allow-star-arg-any`](#allow-star-arg-any)
@@ -2440,7 +2479,7 @@ multiline-quotes = "single"
 #### [`ban-relative-imports`](#ban-relative-imports)

 Whether to ban all relative imports (`"all"`), or only those imports
-that extend into the parent module and beyond (`"parents"`).
+that extend into the parent module or beyond (`"parents"`).

 **Default value**: `"parents"`

@@ -2456,6 +2495,27 @@ ban-relative-imports = "all"

 ---

+#### [`banned-api`](#banned-api)
+
+Specific modules or module members that may not be imported or accessed.
+Note that this check is only meant to flag accidental uses,
+and can be circumvented via `eval` or `importlib`.
+
+**Default value**: `{}`
+
+**Type**: `HashMap<String, BannedApi>`
+
+**Example usage**:
+
+```toml
+[tool.ruff.flake8-tidy-imports]
+[tool.ruff.flake8-tidy-imports.banned-api]
+"cgi".msg = "The cgi module is deprecated, see https://peps.python.org/pep-0594/#cgi."
+"typing.TypedDict".msg = "Use typing_extensions.TypedDict instead."
+```
+
+---
+
 ### `flake8-unused-arguments`

 #### [`ignore-variadic-names`](#ignore-variadic-names)
@@ -2725,7 +2785,7 @@ Whether to use Google-style or Numpy-style conventions when detecting
 docstring sections. By default, conventions will be inferred from
 the available sections.

-**Default value**: `"convention"`
+**Default value**: `None`

 **Type**: `Convention`

--- a/flake8_to_ruff/Cargo.lock
+++ b/flake8_to_ruff/Cargo.lock
@@ -771,7 +771,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8_to_ruff"
-version = "0.0.199"
+version = "0.0.202"
 dependencies = [
 "anyhow",
 "clap",
@@ -1975,7 +1975,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.199"
+version = "0.0.202"
 dependencies = [
 "anyhow",
 "bincode",
--- a/flake8_to_ruff/Cargo.toml
+++ b/flake8_to_ruff/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "flake8-to-ruff"
-version = "0.0.199-dev.0"
+version = "0.0.202-dev.0"
 edition = "2021"

 [lib]
--- a/flake8_to_ruff/src/converter.rs
+++ b/flake8_to_ruff/src/converter.rs
@@ -164,17 +164,17 @@ pub fn convert(
                // flake8-quotes
                "quotes" | "inline-quotes" | "inline_quotes" => match value.trim() {
                    "'" | "single" => flake8_quotes.inline_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.inline_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.inline_quotes = Some(Quote::Double),
                    _ => eprintln!("Unexpected '{key}' value: {value}"),
                },
                "multiline-quotes" | "multiline_quotes" => match value.trim() {
                    "'" | "single" => flake8_quotes.multiline_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.multiline_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.multiline_quotes = Some(Quote::Double),
                    _ => eprintln!("Unexpected '{key}' value: {value}"),
                },
                "docstring-quotes" | "docstring_quotes" => match value.trim() {
                    "'" | "single" => flake8_quotes.docstring_quotes = Some(Quote::Single),
-                    "\"" | "double" => flake8_quotes.docstring_quotes = Some(Quote::Single),
+                    "\"" | "double" => flake8_quotes.docstring_quotes = Some(Quote::Double),
                    _ => eprintln!("Unexpected '{key}' value: {value}"),
                },
                "avoid-escape" | "avoid_escape" => match parser::parse_bool(value.as_ref()) {
@@ -296,6 +296,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -323,7 +324,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -354,6 +355,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -381,7 +383,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -412,6 +414,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -439,7 +442,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -470,6 +473,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -497,7 +501,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -528,6 +532,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -555,7 +560,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -594,6 +599,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -657,7 +663,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
@@ -690,6 +696,7 @@ mod tests {
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -718,7 +725,7 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
-            cache_dir: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
            flake8_errmsg: None,
--- a/flake8_to_ruff/src/plugin.rs
+++ b/flake8_to_ruff/src/plugin.rs
@@ -16,16 +16,17 @@ pub enum Plugin {
    Flake8Datetimez,
    Flake8Debugger,
    Flake8Docstrings,
-    Flake8ErrMsg,
    Flake8Eradicate,
+    Flake8ErrMsg,
+    Flake8ImplicitStrConcat,
    Flake8Print,
    Flake8Quotes,
    Flake8Return,
    Flake8Simplify,
    Flake8TidyImports,
    McCabe,
-    PandasVet,
    PEP8Naming,
+    PandasVet,
    Pyupgrade,
 }

@@ -45,6 +46,7 @@ impl FromStr for Plugin {
            "flake8-docstrings" => Ok(Plugin::Flake8Docstrings),
            "flake8-eradicate" => Ok(Plugin::Flake8Eradicate),
            "flake8-errmsg" => Ok(Plugin::Flake8ErrMsg),
+            "flake8-implicit-str-concat" => Ok(Plugin::Flake8ImplicitStrConcat),
            "flake8-print" => Ok(Plugin::Flake8Print),
            "flake8-quotes" => Ok(Plugin::Flake8Quotes),
            "flake8-return" => Ok(Plugin::Flake8Return),
@@ -76,14 +78,15 @@ impl fmt::Debug for Plugin {
                Plugin::Flake8Docstrings => "flake8-docstrings",
                Plugin::Flake8Eradicate => "flake8-eradicate",
                Plugin::Flake8ErrMsg => "flake8-errmsg",
+                Plugin::Flake8ImplicitStrConcat => "flake8-implicit-str-concat",
                Plugin::Flake8Print => "flake8-print",
                Plugin::Flake8Quotes => "flake8-quotes",
                Plugin::Flake8Return => "flake8-return",
                Plugin::Flake8Simplify => "flake8-simplify",
                Plugin::Flake8TidyImports => "flake8-tidy-imports",
                Plugin::McCabe => "mccabe",
-                Plugin::PandasVet => "pandas-vet",
                Plugin::PEP8Naming => "pep8-naming",
+                Plugin::PandasVet => "pandas-vet",
                Plugin::Pyupgrade => "pyupgrade",
            }
        )
@@ -106,6 +109,7 @@ impl Plugin {
            // TODO(charlie): Handle rename of `E` to `ERA`.
            Plugin::Flake8Eradicate => CheckCodePrefix::ERA,
            Plugin::Flake8ErrMsg => CheckCodePrefix::EM,
+            Plugin::Flake8ImplicitStrConcat => CheckCodePrefix::ISC,
            Plugin::Flake8Print => CheckCodePrefix::T2,
            Plugin::Flake8Quotes => CheckCodePrefix::Q,
            Plugin::Flake8Return => CheckCodePrefix::RET,
@@ -146,6 +150,7 @@ impl Plugin {
            }
            Plugin::Flake8Eradicate => vec![CheckCodePrefix::ERA],
            Plugin::Flake8ErrMsg => vec![CheckCodePrefix::EM],
+            Plugin::Flake8ImplicitStrConcat => vec![CheckCodePrefix::ISC],
            Plugin::Flake8Print => vec![CheckCodePrefix::T2],
            Plugin::Flake8Quotes => vec![CheckCodePrefix::Q],
            Plugin::Flake8Return => vec![CheckCodePrefix::RET],
@@ -449,6 +454,7 @@ pub fn infer_plugins_from_codes(codes: &BTreeSet<CheckCodePrefix>) -> Vec<Plugin
        Plugin::Flake8Docstrings,
        Plugin::Flake8Eradicate,
        Plugin::Flake8ErrMsg,
+        Plugin::Flake8ImplicitStrConcat,
        Plugin::Flake8Print,
        Plugin::Flake8Quotes,
        Plugin::Flake8Return,
--- a/playground/.prettierignore
+++ b/playground/.prettierignore
@@ -1 +0,0 @@
-src/ruff_options.ts
--- a/playground/.prettierrc.json
+++ b/playground/.prettierrc.json
@@ -0,0 +1,3 @@
+{
+  "trailingComma": "all"
+}
--- a/playground/README.md
+++ b/playground/README.md
@@ -8,3 +8,7 @@ In-browser playground for Ruff. Available [https://ruff.pages.dev/](https://ruff
  root directory.
 - Install TypeScript dependencies with: `npm install`.
 - Start the development server with: `npm run dev`.
+
+## Implementation
+
+Design based on [Tailwind Play](https://play.tailwindcss.com/). Themed with [`ayu`](https://github.com/dempfi/ayu).
--- a/playground/index.html
+++ b/playground/index.html
@@ -13,10 +13,11 @@
      rel="icon"
      href="data:image/svg+xml,<svg xmlns=%22http://www.w3.org/2000/svg%22 viewBox=%220 0 100 100%22><text y=%22.9em%22 font-size=%2290%22>🛠️</text></svg>"
    />
+    <link rel="stylesheet" href="https://rsms.me/inter/inter.css" />
  </head>
  <body>
    <div id="root"></div>
-    <div style="display: flex; position: fixed; right: 16px; top: 16px">
+    <div style="display: flex; position: fixed; right: 16px; bottom: 16px">
      <a href="https://GitHub.com/charliermarsh/ruff"
        ><img
          src="https://img.shields.io/github/stars/charliermarsh/ruff.svg?style=social&label=GitHub&maxAge=2592000&?logoWidth=100"
--- a/playground/package-lock.json
+++ b/playground/package-lock.json
--- a/playground/package.json
+++ b/playground/package.json
@@ -14,6 +14,7 @@
  },
  "dependencies": {
    "@monaco-editor/react": "^4.4.6",
+    "classnames": "^2.3.2",
    "lz-string": "^1.4.4",
    "monaco-editor": "^0.34.1",
    "react": "^18.2.0",
@@ -25,13 +26,16 @@
    "@typescript-eslint/eslint-plugin": "^5.47.1",
    "@typescript-eslint/parser": "^5.47.1",
    "@vitejs/plugin-react-swc": "^3.0.0",
+    "autoprefixer": "^10.4.13",
    "eslint": "^8.30.0",
    "eslint-config-prettier": "^8.5.0",
    "eslint-plugin-import": "^2.26.0",
    "eslint-plugin-prettier": "^4.2.1",
    "eslint-plugin-react": "^7.31.11",
    "eslint-plugin-react-hooks": "^4.6.0",
+    "postcss": "^8.4.20",
    "prettier": "^2.8.1",
+    "tailwindcss": "^3.2.4",
    "typescript": "^4.9.3",
    "vite": "^4.0.0"
  }
--- a/playground/postcss.config.cjs
+++ b/playground/postcss.config.cjs
@@ -0,0 +1,6 @@
+module.exports = {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+};
--- a/playground/src/App.tsx
+++ b/playground/src/App.tsx
@@ -1,200 +0,0 @@
-import lzstring from "lz-string";
-import Editor, { useMonaco } from "@monaco-editor/react";
-import { MarkerSeverity } from "monaco-editor/esm/vs/editor/editor.api";
-import { useEffect, useState, useCallback } from "react";
-
-import init, { Check, check } from "./pkg/ruff.js";
-import { AVAILABLE_OPTIONS } from "./ruff_options";
-import { Config, getDefaultConfig, toRuffConfig } from "./config";
-import { Options } from "./Options";
-
-const DEFAULT_SOURCE =
-  "# Define a function that takes an integer n and returns the nth number in the Fibonacci\n" +
-  "# sequence.\n" +
-  "def fibonacci(n):\n" +
-  "  if n == 0:\n" +
-  "    return 0\n" +
-  "  elif n == 1:\n" +
-  "    return 1\n" +
-  "  else:\n" +
-  "    return fibonacci(n-1) + fibonacci(n-2)\n" +
-  "\n" +
-  "# Use a for loop to generate and print the first 10 numbers in the Fibonacci sequence.\n" +
-  "for i in range(10):\n" +
-  "  print(fibonacci(i))\n" +
-  "\n" +
-  "# Output:\n" +
-  "# 0\n" +
-  "# 1\n" +
-  "# 1\n" +
-  "# 2\n" +
-  "# 3\n" +
-  "# 5\n" +
-  "# 8\n" +
-  "# 13\n" +
-  "# 21\n" +
-  "# 34\n";
-
-function restoreConfigAndSource(): [Config, string] {
-  const value = lzstring.decompressFromEncodedURIComponent(
-    window.location.hash.slice(1)
-  );
-  let config = {};
-  let source = DEFAULT_SOURCE;
-
-  if (value) {
-    const parts = value.split("$$$");
-    config = JSON.parse(parts[0]);
-    source = parts[1];
-  }
-
-  return [config, source];
-}
-
-function persistConfigAndSource(config: Config, source: string) {
-  window.location.hash = lzstring.compressToEncodedURIComponent(
-    JSON.stringify(config) + "$$$" + source
-  );
-}
-
-const defaultConfig = getDefaultConfig(AVAILABLE_OPTIONS);
-
-export default function App() {
-  const monaco = useMonaco();
-  const [initialized, setInitialized] = useState<boolean>(false);
-  const [config, setConfig] = useState<Config | null>(null);
-  const [source, setSource] = useState<string | null>(null);
-  const [error, setError] = useState<string | null>(null);
-
-  useEffect(() => {
-    init().then(() => setInitialized(true));
-  }, []);
-
-  useEffect(() => {
-    if (source == null && config == null && monaco) {
-      const [config, source] = restoreConfigAndSource();
-      setConfig(config);
-      setSource(source);
-    }
-  }, [monaco, source, config]);
-
-  useEffect(() => {
-    if (config != null && source != null) {
-      persistConfigAndSource(config, source);
-    }
-  }, [config, source]);
-
-  useEffect(() => {
-    const editor = monaco?.editor;
-    const model = editor?.getModels()[0];
-    if (!editor || !model || !initialized || source == null || config == null) {
-      return;
-    }
-
-    let checks: Check[];
-    try {
-      checks = check(source, toRuffConfig(config));
-      setError(null);
-    } catch (e) {
-      setError(String(e));
-      return;
-    }
-
-    editor.setModelMarkers(
-      model,
-      "owner",
-      checks.map((check) => ({
-        startLineNumber: check.location.row,
-        startColumn: check.location.column + 1,
-        endLineNumber: check.end_location.row,
-        endColumn: check.end_location.column + 1,
-        message: `${check.code}: ${check.message}`,
-        severity: MarkerSeverity.Error,
-      }))
-    );
-
-    const codeActionProvider = monaco?.languages.registerCodeActionProvider(
-      "python",
-      {
-        // @ts-expect-error: The type definition is wrong.
-        provideCodeActions: function (model, position) {
-          const actions = checks
-            .filter((check) => position.startLineNumber === check.location.row)
-            .filter((check) => check.fix)
-            .map((check) => ({
-              title: `Fix ${check.code}`,
-              id: `fix-${check.code}`,
-              kind: "quickfix",
-              edit: check.fix
-                ? {
-                    edits: [
-                      {
-                        resource: model.uri,
-                        versionId: model.getVersionId(),
-                        edit: {
-                          range: {
-                            startLineNumber: check.fix.location.row,
-                            startColumn: check.fix.location.column + 1,
-                            endLineNumber: check.fix.end_location.row,
-                            endColumn: check.fix.end_location.column + 1,
-                          },
-                          text: check.fix.content,
-                        },
-                      },
-                    ],
-                  }
-                : undefined,
-            }));
-          return { actions, dispose: () => {} };
-        },
-      }
-    );
-
-    return () => {
-      codeActionProvider?.dispose();
-    };
-  }, [config, source, monaco, initialized]);
-
-  const handleEditorChange = useCallback(
-    (value: string | undefined) => {
-      setSource(value || "");
-    },
-    [setSource]
-  );
-
-  const handleOptionChange = useCallback(
-    (groupName: string, fieldName: string, value: string) => {
-      const group = Object.assign({}, (config || {})[groupName]);
-      if (value === defaultConfig[groupName][fieldName] || value === "") {
-        delete group[fieldName];
-      } else {
-        group[fieldName] = value;
-      }
-
-      setConfig({
-        ...config,
-        [groupName]: group,
-      });
-    },
-    [config]
-  );
-
-  return (
-    <div id="app">
-      <Options
-        config={config}
-        defaultConfig={defaultConfig}
-        onChange={handleOptionChange}
-      />
-      <Editor
-        options={{ readOnly: false, minimap: { enabled: false } }}
-        wrapperProps={{ className: "editor" }}
-        defaultLanguage="python"
-        value={source || ""}
-        theme={"light"}
-        onChange={handleEditorChange}
-      />
-      {error && <div id="error">{error}</div>}
-    </div>
-  );
-}
--- a/playground/src/Editor/Editor.tsx
+++ b/playground/src/Editor/Editor.tsx
@@ -0,0 +1,151 @@
+import { useCallback, useEffect, useState } from "react";
+import { DEFAULT_PYTHON_SOURCE } from "../constants";
+import init, { check, Check, currentVersion, defaultSettings } from "../pkg";
+import { ErrorMessage } from "./ErrorMessage";
+import Header from "./Header";
+import { useTheme } from "./theme";
+import { persist, restore, stringify } from "./settings";
+import SettingsEditor from "./SettingsEditor";
+import SourceEditor from "./SourceEditor";
+import MonacoThemes from "./MonacoThemes";
+
+type Tab = "Source" | "Settings";
+
+export default function Editor() {
+  const [initialized, setInitialized] = useState<boolean>(false);
+  const [version, setVersion] = useState<string | null>(null);
+  const [tab, setTab] = useState<Tab>("Source");
+  const [edit, setEdit] = useState<number>(0);
+  const [settingsSource, setSettingsSource] = useState<string | null>(null);
+  const [pythonSource, setPythonSource] = useState<string | null>(null);
+  const [checks, setChecks] = useState<Check[]>([]);
+  const [error, setError] = useState<string | null>(null);
+  const [theme, setTheme] = useTheme();
+
+  useEffect(() => {
+    init().then(() => setInitialized(true));
+  }, []);
+
+  useEffect(() => {
+    if (!initialized || settingsSource == null || pythonSource == null) {
+      return;
+    }
+
+    let config: any;
+    let checks: Check[];
+
+    try {
+      config = JSON.parse(settingsSource);
+    } catch (e) {
+      setChecks([]);
+      setError((e as Error).message);
+      return;
+    }
+
+    try {
+      checks = check(pythonSource, config);
+    } catch (e) {
+      setError(e as string);
+      return;
+    }
+
+    setError(null);
+    setChecks(checks);
+  }, [initialized, settingsSource, pythonSource]);
+
+  useEffect(() => {
+    if (!initialized) {
+      return;
+    }
+
+    if (settingsSource == null || pythonSource == null) {
+      const payload = restore();
+      if (payload) {
+        const [settingsSource, pythonSource] = payload;
+        setSettingsSource(settingsSource);
+        setPythonSource(pythonSource);
+      } else {
+        setSettingsSource(stringify(defaultSettings()));
+        setPythonSource(DEFAULT_PYTHON_SOURCE);
+      }
+    }
+  }, [initialized, settingsSource, pythonSource]);
+
+  useEffect(() => {
+    if (!initialized) {
+      return;
+    }
+
+    setVersion(currentVersion());
+  }, [initialized]);
+
+  const handleShare = useCallback(() => {
+    if (!initialized || settingsSource == null || pythonSource == null) {
+      return;
+    }
+
+    persist(settingsSource, pythonSource);
+  }, [initialized, settingsSource, pythonSource]);
+
+  const handlePythonSourceChange = useCallback((pythonSource: string) => {
+    setEdit((edit) => edit + 1);
+    setPythonSource(pythonSource);
+  }, []);
+
+  const handleSettingsSourceChange = useCallback((settingsSource: string) => {
+    setEdit((edit) => edit + 1);
+    setSettingsSource(settingsSource);
+  }, []);
+
+  return (
+    <main
+      className={
+        "h-full w-full flex flex-auto bg-ayu-background dark:bg-ayu-background-dark"
+      }
+    >
+      <Header
+        edit={edit}
+        tab={tab}
+        theme={theme}
+        version={version}
+        onChangeTab={setTab}
+        onChangeTheme={setTheme}
+        onShare={initialized ? handleShare : undefined}
+      />
+
+      <MonacoThemes />
+
+      <div className={"mt-12 relative flex-auto"}>
+        {initialized && settingsSource != null && pythonSource != null ? (
+          <>
+            <SourceEditor
+              visible={tab === "Source"}
+              source={pythonSource}
+              theme={theme}
+              checks={checks}
+              onChange={handlePythonSourceChange}
+            />
+            <SettingsEditor
+              visible={tab === "Settings"}
+              source={settingsSource}
+              theme={theme}
+              onChange={handleSettingsSourceChange}
+            />
+          </>
+        ) : null}
+      </div>
+      {error && tab === "Source" ? (
+        <div
+          style={{
+            position: "fixed",
+            left: "10%",
+            right: "10%",
+            bottom: "10%",
+          }}
+        >
+          <ErrorMessage>{error}</ErrorMessage>
+        </div>
+      ) : null}
+    </main>
+  );
+}
--- a/playground/src/Editor/ErrorMessage.tsx
+++ b/playground/src/Editor/ErrorMessage.tsx
@@ -0,0 +1,26 @@
+function truncate(str: string, length: number) {
+  if (str.length > length) {
+    return str.slice(0, length) + "...";
+  } else {
+    return str;
+  }
+}
+
+export function ErrorMessage({ children }: { children: string }) {
+  return (
+    <div
+      className="bg-orange-100 border-l-4 border-orange-500 text-orange-700 p-4"
+      role="alert"
+    >
+      <p className="font-bold">Error</p>
+      <p className="block sm:inline">
+        {truncate(
+          children.startsWith("Error: ")
+            ? children.slice("Error: ".length)
+            : children,
+          120,
+        )}
+      </p>
+    </div>
+  );
+}
--- a/playground/src/Editor/Header.tsx
+++ b/playground/src/Editor/Header.tsx
@@ -0,0 +1,99 @@
+import classNames from "classnames";
+import ThemeButton from "./ThemeButton";
+import ShareButton from "./ShareButton";
+import { Theme } from "./theme";
+import VersionTag from "./VersionTag";
+
+export type Tab = "Source" | "Settings";
+
+export default function Header({
+  edit,
+  tab,
+  theme,
+  version,
+  onChangeTab,
+  onChangeTheme,
+  onShare,
+}: {
+  edit: number;
+  tab: Tab;
+  theme: Theme;
+  version: string | null;
+  onChangeTab: (tab: Tab) => void;
+  onChangeTheme: (theme: Theme) => void;
+  onShare?: () => void;
+}) {
+  return (
+    <div
+      className={classNames(
+        "w-full",
+        "flex",
+        "items-center",
+        "justify-between",
+        "flex-none",
+        "pl-5",
+        "sm:pl-6",
+        "pr-4",
+        "lg:pr-6",
+        "absolute",
+        "z-10",
+        "top-0",
+        "left-0",
+        "-mb-px",
+        "antialiased",
+        "border-b",
+        "border-gray-200",
+        "dark:border-gray-800",
+      )}
+    >
+      <div className="flex space-x-5">
+        <button
+          type="button"
+          className={classNames(
+            "relative flex py-3 text-sm leading-6 font-semibold focus:outline-none",
+            tab === "Source"
+              ? "text-ayu-accent"
+              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white",
+          )}
+          onClick={() => onChangeTab("Source")}
+        >
+          <span
+            className={classNames(
+              "absolute bottom-0 inset-x-0 bg-ayu-accent h-0.5 rounded-full transition-opacity duration-150",
+              tab === "Source" ? "opacity-100" : "opacity-0",
+            )}
+          />
+          Source
+        </button>
+        <button
+          type="button"
+          className={classNames(
+            "relative flex py-3 text-sm leading-6 font-semibold focus:outline-none",
+            tab === "Settings"
+              ? "text-ayu-accent"
+              : "text-gray-700 hover:text-gray-900 focus:text-gray-900 dark:text-gray-300 dark:hover:text-white",
+          )}
+          onClick={() => onChangeTab("Settings")}
+        >
+          <span
+            className={classNames(
+              "absolute bottom-0 inset-x-0 bg-ayu-accent h-0.5 rounded-full transition-opacity duration-150",
+              tab === "Settings" ? "opacity-100" : "opacity-0",
+            )}
+          />
+          Settings
+        </button>
+        {version ? (
+          <div className={"flex items-center"}>
+            <VersionTag>v{version}</VersionTag>
+          </div>
+        ) : null}
+      </div>
+      <div className={"hidden sm:flex items-center min-w-0"}>
+        <ShareButton key={edit} onShare={onShare} />
+        <div className="hidden sm:block mx-6 lg:mx-4 w-px h-6 bg-gray-200 dark:bg-gray-700" />
+        <ThemeButton theme={theme} onChange={onChangeTheme} />
+      </div>
+    </div>
+  );
+}
--- a/playground/src/Editor/MonacoThemes.tsx
+++ b/playground/src/Editor/MonacoThemes.tsx
--- a/playground/src/Editor/SettingsEditor.tsx
+++ b/playground/src/Editor/SettingsEditor.tsx
@@ -0,0 +1,57 @@
+/**
+ * Editor for the settings JSON.
+ */
+
+import Editor, { useMonaco } from "@monaco-editor/react";
+import { useCallback, useEffect } from "react";
+import schema from "../../../ruff.schema.json";
+import { Theme } from "./theme";
+
+export default function SettingsEditor({
+  visible,
+  source,
+  theme,
+  onChange,
+}: {
+  visible: boolean;
+  source: string;
+  theme: Theme;
+  onChange: (source: string) => void;
+}) {
+  const monaco = useMonaco();
+
+  useEffect(() => {
+    monaco?.languages.json.jsonDefaults.setDiagnosticsOptions({
+      schemas: [
+        {
+          uri: "https://raw.githubusercontent.com/charliermarsh/ruff/main/ruff.schema.json",
+          fileMatch: ["*"],
+          schema,
+        },
+      ],
+    });
+  }, [monaco]);
+
+  const handleChange = useCallback(
+    (value: string | undefined) => {
+      onChange(value ?? "");
+    },
+    [onChange],
+  );
+  return (
+    <Editor
+      options={{
+        readOnly: false,
+        minimap: { enabled: false },
+        fontSize: 14,
+        roundedSelection: false,
+        scrollBeyondLastLine: false,
+      }}
+      wrapperProps={visible ? {} : { style: { display: "none" } }}
+      language={"json"}
+      value={source}
+      theme={theme === "light" ? "Ayu-Light" : "Ayu-Dark"}
+      onChange={handleChange}
+    />
+  );
+}
--- a/playground/src/Editor/ShareButton.tsx
+++ b/playground/src/Editor/ShareButton.tsx
@@ -0,0 +1,53 @@
+import { useEffect, useState } from "react";
+
+export default function ShareButton({ onShare }: { onShare?: () => void }) {
+  const [copied, setCopied] = useState(false);
+
+  useEffect(() => {
+    if (copied) {
+      const timeout = setTimeout(() => setCopied(false), 2000);
+      return () => clearTimeout(timeout);
+    }
+  }, [copied]);
+
+  return copied ? (
+    <button
+      type="button"
+      className="relative flex-none rounded-md text-sm font-semibold leading-6 py-1.5 px-3 cursor-auto text-ayu-accent shadow-copied dark:bg-ayu-accent/10"
+    >
+      <span
+        className="absolute inset-0 flex items-center justify-center invisible"
+        aria-hidden="true"
+      >
+        Share
+      </span>
+      <span className="" aria-hidden="false">
+        Copied!
+      </span>
+    </button>
+  ) : (
+    <button
+      type="button"
+      className="relative flex-none rounded-md text-sm font-semibold leading-6 py-1.5 px-3 enabled:hover:bg-ayu-accent/80 bg-ayu-accent text-white shadow-sm dark:shadow-highlight/20 disabled:opacity-50"
+      disabled={!onShare || copied}
+      onClick={
+        onShare
+          ? () => {
+              setCopied(true);
+              onShare();
+            }
+          : undefined
+      }
+    >
+      <span
+        className="absolute inset-0 flex items-center justify-center"
+        aria-hidden="false"
+      >
+        Share
+      </span>
+      <span className="invisible" aria-hidden="true">
+        Copied!
+      </span>
+    </button>
+  );
+}
--- a/playground/src/Editor/SourceEditor.tsx
+++ b/playground/src/Editor/SourceEditor.tsx
@@ -0,0 +1,115 @@
+/**
+ * Editor for the Python source code.
+ */
+
+import Editor, { useMonaco } from "@monaco-editor/react";
+import { MarkerSeverity, MarkerTag } from "monaco-editor";
+import { useCallback, useEffect } from "react";
+import { Check } from "../pkg";
+import { Theme } from "./theme";
+
+export default function SourceEditor({
+  visible,
+  source,
+  theme,
+  checks,
+  onChange,
+}: {
+  visible: boolean;
+  source: string;
+  checks: Check[];
+  theme: Theme;
+  onChange: (pythonSource: string) => void;
+}) {
+  const monaco = useMonaco();
+
+  useEffect(() => {
+    const editor = monaco?.editor;
+    const model = editor?.getModels()[0];
+    if (!editor || !model) {
+      return;
+    }
+
+    editor.setModelMarkers(
+      model,
+      "owner",
+      checks.map((check) => ({
+        startLineNumber: check.location.row,
+        startColumn: check.location.column + 1,
+        endLineNumber: check.end_location.row,
+        endColumn: check.end_location.column + 1,
+        message: `${check.code}: ${check.message}`,
+        severity: MarkerSeverity.Error,
+        tags:
+          check.code === "F401" || check.code === "F841"
+            ? [MarkerTag.Unnecessary]
+            : [],
+      })),
+    );
+
+    const codeActionProvider = monaco?.languages.registerCodeActionProvider(
+      "python",
+      {
+        // @ts-expect-error: The type definition is wrong.
+        provideCodeActions: function (model, position) {
+          const actions = checks
+            .filter((check) => position.startLineNumber === check.location.row)
+            .filter((check) => check.fix)
+            .map((check) => ({
+              title: `Fix ${check.code}`,
+              id: `fix-${check.code}`,
+              kind: "quickfix",
+              edit: check.fix
+                ? {
+                    edits: [
+                      {
+                        resource: model.uri,
+                        versionId: model.getVersionId(),
+                        edit: {
+                          range: {
+                            startLineNumber: check.fix.location.row,
+                            startColumn: check.fix.location.column + 1,
+                            endLineNumber: check.fix.end_location.row,
+                            endColumn: check.fix.end_location.column + 1,
+                          },
+                          text: check.fix.content,
+                        },
+                      },
+                    ],
+                  }
+                : undefined,
+            }));
+          return { actions, dispose: () => {} };
+        },
+      },
+    );
+
+    return () => {
+      codeActionProvider?.dispose();
+    };
+  }, [checks, monaco]);
+
+  const handleChange = useCallback(
+    (value: string | undefined) => {
+      onChange(value ?? "");
+    },
+    [onChange],
+  );
+
+  return (
+    <Editor
+      options={{
+        readOnly: false,
+        minimap: { enabled: false },
+        fontSize: 14,
+        roundedSelection: false,
+        scrollBeyondLastLine: false,
+      }}
+      language={"python"}
+      wrapperProps={visible ? {} : { style: { display: "none" } }}
+      theme={theme === "light" ? "Ayu-Light" : "Ayu-Dark"}
+      value={source}
+      onChange={handleChange}
+    />
+  );
+}
--- a/playground/src/Editor/ThemeButton.tsx
+++ b/playground/src/Editor/ThemeButton.tsx
@@ -0,0 +1,49 @@
+/**
+ * Button to toggle between light and dark mode themes.
+ */
+import { Theme } from "./theme";
+
+export default function ThemeButton({
+  theme,
+  onChange,
+}: {
+  theme: Theme;
+  onChange: (theme: Theme) => void;
+}) {
+  return (
+    <button
+      type="button"
+      className="ml-4 sm:ml-0 ring-1 ring-gray-900/5 shadow-sm hover:bg-gray-50 dark:ring-0 dark:bg-gray-800 dark:hover:bg-gray-700 dark:shadow-highlight/4 group focus:outline-none focus-visible:ring-2 rounded-md focus-visible:ring-ayu-accent dark:focus-visible:ring-2 dark:focus-visible:ring-gray-400"
+      onClick={() => onChange(theme === "light" ? "dark" : "light")}
+    >
+      <span className="sr-only">
+        <span className="dark:hidden">Switch to dark theme</span>
+        <span className="hidden dark:inline">Switch to light theme</span>
+      </span>
+      <svg
+        width="36"
+        height="36"
+        viewBox="-6 -6 36 36"
+        strokeWidth="2"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        className="stroke-ayu-accent fill-ayu-accent/10 group-hover:stroke-ayu-accent/80 dark:stroke-gray-400 dark:fill-gray-400/20 dark:group-hover:stroke-gray-300"
+      >
+        <g className="dark:opacity-0">
+          <path d="M15 12a3 3 0 1 1-6 0 3 3 0 0 1 6 0Z"></path>
+          <path
+            d="M12 4v.01M17.66 6.345l-.007.007M20.005 12.005h-.01M17.66 17.665l-.007-.007M12 20.01V20M6.34 17.665l.007-.007M3.995 12.005h.01M6.34 6.344l.007.007"
+            fill="none"
+          />
+        </g>
+        <g className="opacity-0 dark:opacity-100">
+          <path d="M16 12a4 4 0 1 1-8 0 4 4 0 0 1 8 0Z" />
+          <path
+            d="M12 3v1M18.66 5.345l-.828.828M21.005 12.005h-1M18.66 18.665l-.828-.828M12 21.01V20M5.34 18.666l.835-.836M2.995 12.005h1.01M5.34 5.344l.835.836"
+            fill="none"
+          />
+        </g>
+      </svg>
+    </button>
+  );
+}
--- a/playground/src/Editor/VersionTag.tsx
+++ b/playground/src/Editor/VersionTag.tsx
@@ -0,0 +1,26 @@
+import classNames from "classnames";
+import { ReactNode } from "react";
+
+export default function VersionTag({ children }: { children: ReactNode }) {
+  return (
+    <div
+      className={classNames(
+        "text-gray-500",
+        "text-xs",
+        "leading-5",
+        "font-semibold",
+        "bg-gray-400/10",
+        "rounded-full",
+        "py-1",
+        "px-3",
+        "flex",
+        "items-center",
+        "dark:bg-gray-800",
+        "dark:text-gray-400",
+        "dark:shadow-highlight/4",
+      )}
+    >
+      {children}
+    </div>
+  );
+}
--- a/playground/src/Editor/index.tsx
+++ b/playground/src/Editor/index.tsx
@@ -0,0 +1,3 @@
+import Editor from "./Editor";
+
+export default Editor;
--- a/playground/src/Editor/settings.ts
+++ b/playground/src/Editor/settings.ts
@@ -0,0 +1,50 @@
+import lzstring from "lz-string";
+
+export type Settings = { [K: string]: any };
+
+/**
+ * Stringify a settings object to JSON.
+ */
+export function stringify(settings: Settings): string {
+  return JSON.stringify(
+    settings,
+    (k, v) => {
+      if (v instanceof Map) {
+        return Object.fromEntries(v.entries());
+      } else {
+        return v;
+      }
+    },
+    2,
+  );
+}
+
+/**
+ * Persist the configuration to a URL.
+ */
+export async function persist(settingsSource: string, pythonSource: string) {
+  const hash = lzstring.compressToEncodedURIComponent(
+    settingsSource + "$$$" + pythonSource,
+  );
+  await navigator.clipboard.writeText(
+    window.location.href.split("#")[0] + "#" + hash,
+  );
+}
+
+/**
+ * Restore the configuration from a URL.
+ */
+export function restore(): [string, string] | null {
+  const value = lzstring.decompressFromEncodedURIComponent(
+    window.location.hash.slice(1),
+  );
+
+  if (value) {
+    const parts = value.split("$$$");
+    const settingsSource = parts[0];
+    const pythonSource = parts[1];
+    return [settingsSource, pythonSource];
+  } else {
+    return null;
+  }
+}
--- a/playground/src/Editor/theme.ts
+++ b/playground/src/Editor/theme.ts
@@ -0,0 +1,35 @@
+/**
+ * Light and dark mode theming.
+ */
+import { useEffect, useState } from "react";
+
+export type Theme = "dark" | "light";
+
+export function useTheme(): [Theme, (theme: Theme) => void] {
+  const [localTheme, setLocalTheme] = useState<Theme>("light");
+
+  const setTheme = (mode: Theme) => {
+    if (mode === "dark") {
+      document.body.classList.add("dark");
+    } else {
+      document.body.classList.remove("dark");
+    }
+    localStorage.setItem("theme", mode);
+    setLocalTheme(mode);
+  };
+
+  useEffect(() => {
+    const initialTheme = localStorage.getItem("theme");
+    if (initialTheme === "dark") {
+      setTheme("dark");
+    } else if (initialTheme === "light") {
+      setTheme("light");
+    } else if (window.matchMedia("(prefers-color-scheme: dark)").matches) {
+      setTheme("dark");
+    } else {
+      setTheme("light");
+    }
+  }, []);
+
+  return [localTheme, setTheme];
+}
--- a/playground/src/Editor/utils.ts
+++ b/playground/src/Editor/utils.ts
@@ -0,0 +1,7 @@
+export async function copyTextToClipboard(text: string) {
+  if ("clipboard" in navigator) {
+    return await navigator.clipboard.writeText(text);
+  } else {
+    return document.execCommand("copy", true, text);
+  }
+}
--- a/playground/src/Options.tsx
+++ b/playground/src/Options.tsx
@@ -1,72 +0,0 @@
-import { Config } from "./config";
-import { AVAILABLE_OPTIONS } from "./ruff_options";
-
-function OptionEntry({
-  config,
-  defaultConfig,
-  groupName,
-  fieldName,
-  onChange,
-}: {
-  config: Config | null;
-  defaultConfig: Config;
-  groupName: string;
-  fieldName: string;
-  onChange: (groupName: string, fieldName: string, value: string) => void;
-}) {
-  const value =
-    config && config[groupName] && config[groupName][fieldName]
-      ? config[groupName][fieldName]
-      : "";
-
-  return (
-    <span>
-      <label>
-        {fieldName}
-        <input
-          value={value}
-          placeholder={defaultConfig[groupName][fieldName]}
-          type="text"
-          onChange={(event) => {
-            onChange(groupName, fieldName, event.target.value);
-          }}
-        />
-      </label>
-    </span>
-  );
-}
-
-export function Options({
-  config,
-  defaultConfig,
-  onChange,
-}: {
-  config: Config | null;
-  defaultConfig: Config;
-  onChange: (groupName: string, fieldName: string, value: string) => void;
-}) {
-  return (
-    <div className="options">
-      {AVAILABLE_OPTIONS.map((group) => (
-        <details key={group.name}>
-          <summary>{group.name}</summary>
-          <div>
-            <ul>
-              {group.fields.map((field) => (
-                <li key={field.name}>
-                  <OptionEntry
-                    config={config}
-                    defaultConfig={defaultConfig}
-                    groupName={group.name}
-                    fieldName={field.name}
-                    onChange={onChange}
-                  />
-                </li>
-              ))}
-            </ul>
-          </div>
-        </details>
-      ))}
-    </div>
-  );
-}
--- a/playground/src/config.ts
+++ b/playground/src/config.ts
@@ -1,52 +0,0 @@
-import { OptionGroup } from "./ruff_options";
-
-export type Config = { [key: string]: { [key: string]: string } };
-
-export function getDefaultConfig(availableOptions: OptionGroup[]): Config {
-  const config: Config = {};
-  availableOptions.forEach((group) => {
-    config[group.name] = {};
-    group.fields.forEach((f) => {
-      config[group.name][f.name] = f.default;
-    });
-  });
-  return config;
-}
-
-/**
- * Convert the config in the application to something Ruff accepts.
- *
- * Application config is always nested one level. Ruff allows for some
- * top-level options.
- *
- * Any option value is parsed as JSON to convert it to a native JS object.
- * If that fails, e.g. while a user is typing, we let the application handle that
- * and show an error.
- */
-export function toRuffConfig(config: Config): any {
-  const convertValue = (value: string): any => {
-    return value === "None" ? null : JSON.parse(value);
-  };
-
-  const result: any = {};
-  Object.keys(config).forEach((group_name) => {
-    const fields = config[group_name];
-    if (!fields || Object.keys(fields).length === 0) {
-      return;
-    }
-
-    if (group_name === "globals") {
-      Object.keys(fields).forEach((field_name) => {
-        result[field_name] = convertValue(fields[field_name]);
-      });
-    } else {
-      result[group_name] = {};
-
-      Object.keys(fields).forEach((field_name) => {
-        result[group_name][field_name] = convertValue(fields[field_name]);
-      });
-    }
-  });
-
-  return result;
-}
--- a/playground/src/constants.ts
+++ b/playground/src/constants.ts
@@ -0,0 +1,31 @@
+export const DEFAULT_PYTHON_SOURCE =
+  "import os\n" +
+  "\n" +
+  "# Define a function that takes an integer n and returns the nth number in the Fibonacci\n" +
+  "# sequence.\n" +
+  "def fibonacci(n):\n" +
+  '    """Compute the nth number in the Fibonacci sequence."""\n' +
+  "    x = 1\n" +
+  "    if n == 0:\n" +
+  "        return 0\n" +
+  "    elif n == 1:\n" +
+  "        return 1\n" +
+  "    else:\n" +
+  "        return fibonacci(n - 1) + fibonacci(n - 2)\n" +
+  "\n" +
+  "\n" +
+  "# Use a for loop to generate and print the first 10 numbers in the Fibonacci sequence.\n" +
+  "for i in range(10):\n" +
+  "    print(fibonacci(i))\n" +
+  "\n" +
+  "# Output:\n" +
+  "# 0\n" +
+  "# 1\n" +
+  "# 1\n" +
+  "# 2\n" +
+  "# 3\n" +
+  "# 5\n" +
+  "# 8\n" +
+  "# 13\n" +
+  "# 21\n" +
+  "# 34\n";
--- a/playground/src/index.css
+++ b/playground/src/index.css
@@ -0,0 +1,24 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+* {
+  box-sizing: border-box;
+}
+
+body,
+html,
+#root {
+  margin: 0;
+  height: 100%;
+  width: 100%;
+}
+
+.shadow-copied {
+  --tw-shadow: 0 0 0 1px #f07171, inset 0 0 0 1px #f07171;
+  --tw-shadow-colored: 0 0 0 1px var(--tw-shadow-color),
+    inset 0 0 0 1px var(--tw-shadow-color);
+
+  box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000),
+    var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
+}
--- a/playground/src/main.tsx
+++ b/playground/src/main.tsx
@@ -1,10 +1,10 @@
 import React from "react";
 import ReactDOM from "react-dom/client";
-import App from "./App";
-import "./style.css";
+import Editor from "./Editor";
+import "./index.css";

 ReactDOM.createRoot(document.getElementById("root") as HTMLElement).render(
  <React.StrictMode>
-    <App />
-  </React.StrictMode>
+    <Editor />
+  </React.StrictMode>,
 );
--- a/playground/src/ruff_options.ts
+++ b/playground/src/ruff_options.ts
@@ -1,239 +0,0 @@
-
-// This file is auto-generated by `cargo dev generate-playground-options`.
-export interface OptionGroup {
-    name: string;
-    fields: {
-        name: string;
-        default: string;
-        type: string;
-    }[];
-};
-
-export const AVAILABLE_OPTIONS: OptionGroup[] = [
-    {"name": "globals", "fields": [
-        {
-            "name": "allowed-confusables",
-            "default": '[]',
-            "type": 'Vec<char>',
-        },
-        {
-            "name": "dummy-variable-rgx",
-            "default": '"^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"',
-            "type": 'Regex',
-        },
-        {
-            "name": "extend-ignore",
-            "default": '[]',
-            "type": 'Vec<CheckCodePrefix>',
-        },
-        {
-            "name": "extend-select",
-            "default": '[]',
-            "type": 'Vec<CheckCodePrefix>',
-        },
-        {
-            "name": "external",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "fix-only",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "ignore",
-            "default": '[]',
-            "type": 'Vec<CheckCodePrefix>',
-        },
-        {
-            "name": "line-length",
-            "default": '88',
-            "type": 'usize',
-        },
-        {
-            "name": "required-version",
-            "default": 'None',
-            "type": 'String',
-        },
-        {
-            "name": "select",
-            "default": '["E", "F"]',
-            "type": 'Vec<CheckCodePrefix>',
-        },
-        {
-            "name": "target-version",
-            "default": '"py310"',
-            "type": 'PythonVersion',
-        },
-        {
-            "name": "unfixable",
-            "default": '[]',
-            "type": 'Vec<CheckCodePrefix>',
-        },
-    ]},
-    {"name": "flake8-annotations", "fields": [
-        {
-            "name": "allow-star-arg-any",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "mypy-init-return",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "suppress-dummy-args",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "suppress-none-returning",
-            "default": 'false',
-            "type": 'bool',
-        },
-    ]},
-    {"name": "flake8-bugbear", "fields": [
-        {
-            "name": "extend-immutable-calls",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-    ]},
-    {"name": "flake8-errmsg", "fields": [
-        {
-            "name": "max-string-length",
-            "default": '0',
-            "type": 'usize',
-        },
-    ]},
-    {"name": "flake8-import-conventions", "fields": [
-        {
-            "name": "aliases",
-            "default": '{"altair": "alt", "matplotlib.pyplot": "plt", "numpy": "np", "pandas": "pd", "seaborn": "sns"}',
-            "type": 'FxHashMap<String, String>',
-        },
-        {
-            "name": "extend-aliases",
-            "default": '{}',
-            "type": 'FxHashMap<String, String>',
-        },
-    ]},
-    {"name": "flake8-quotes", "fields": [
-        {
-            "name": "avoid-escape",
-            "default": 'true',
-            "type": 'bool',
-        },
-        {
-            "name": "docstring-quotes",
-            "default": '"double"',
-            "type": 'Quote',
-        },
-        {
-            "name": "inline-quotes",
-            "default": '"double"',
-            "type": 'Quote',
-        },
-        {
-            "name": "multiline-quotes",
-            "default": '"double"',
-            "type": 'Quote',
-        },
-    ]},
-    {"name": "flake8-tidy-imports", "fields": [
-        {
-            "name": "ban-relative-imports",
-            "default": '"parents"',
-            "type": 'Strictness',
-        },
-    ]},
-    {"name": "flake8-unused-arguments", "fields": [
-        {
-            "name": "ignore-variadic-names",
-            "default": 'false',
-            "type": 'bool',
-        },
-    ]},
-    {"name": "isort", "fields": [
-        {
-            "name": "combine-as-imports",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "extra-standard-library",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "force-single-line",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "force-wrap-aliases",
-            "default": 'false',
-            "type": 'bool',
-        },
-        {
-            "name": "known-first-party",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "known-third-party",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "single-line-exclusions",
-            "default": '[]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "split-on-trailing-comma",
-            "default": 'true',
-            "type": 'bool',
-        },
-    ]},
-    {"name": "mccabe", "fields": [
-        {
-            "name": "max-complexity",
-            "default": '10',
-            "type": 'usize',
-        },
-    ]},
-    {"name": "pep8-naming", "fields": [
-        {
-            "name": "classmethod-decorators",
-            "default": '["classmethod"]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "ignore-names",
-            "default": '["setUp", "tearDown", "setUpClass", "tearDownClass", "setUpModule", "tearDownModule", "asyncSetUp", "asyncTearDown", "setUpTestData", "failureException", "longMessage", "maxDiff"]',
-            "type": 'Vec<String>',
-        },
-        {
-            "name": "staticmethod-decorators",
-            "default": '["staticmethod"]',
-            "type": 'Vec<String>',
-        },
-    ]},
-    {"name": "pydocstyle", "fields": [
-        {
-            "name": "convention",
-            "default": '"convention"',
-            "type": 'Convention',
-        },
-    ]},
-    {"name": "pyupgrade", "fields": [
-        {
-            "name": "keep-runtime-typing",
-            "default": 'false',
-            "type": 'bool',
-        },
-    ]},
-];
--- a/playground/src/style.css
+++ b/playground/src/style.css
@@ -1,60 +0,0 @@
-* {
-  box-sizing: border-box;
-}
-
-body,
-html,
-#root,
-#app {
-  margin: 0;
-  height: 100%;
-  width: 100%;
-}
-
-#app {
-  display: flex;
-}
-
-.options {
-  height: 100vh;
-  overflow-y: scroll;
-  padding: 1em;
-  min-width: 300px;
-  border-right: 1px solid lightgray;
-}
-
-.options ul {
-  padding-left: 1em;
-  list-style-type: none;
-}
-
-.options li {
-  margin-bottom: 0.3em;
-}
-
-.options details {
-  margin-bottom: 1em;
-}
-
-.options summary {
-  font-size: 1.3rem;
-}
-
-.options input {
-  display: block;
-  width: 100%;
-}
-
-.editor {
-  padding: 1em;
-}
-
-#error {
-  position: fixed;
-  bottom: 0;
-  width: 100%;
-  min-height: 1em;
-  padding: 1em;
-  background: darkred;
-  color: white;
-}
--- a/playground/src/third-party.d.ts
+++ b/playground/src/third-party.d.ts
@@ -1,6 +1,6 @@
 declare module "lz-string" {
  function decompressFromEncodedURIComponent(
-    input: string | null
+    input: string | null,
  ): string | null;
  function compressToEncodedURIComponent(input: string | null): string;
 }
--- a/playground/tailwind.config.cjs
+++ b/playground/tailwind.config.cjs
@@ -0,0 +1,22 @@
+/** @type {import('tailwindcss').Config} */
+const defaultTheme = require("tailwindcss/defaultTheme");
+
+module.exports = {
+  darkMode: "class",
+  content: ["./index.html", "./src/**/*.{js,ts,jsx,tsx}"],
+  theme: {
+    extend: {
+      colors: {
+        "ayu-accent": "#f07171",
+        "ayu-background": {
+          DEFAULT: "#f8f9fa",
+          dark: "#0b0e14",
+        },
+      },
+      fontFamily: {
+        sans: ["Inter var", ...defaultTheme.fontFamily.sans],
+      },
+    },
+  },
+  plugins: [],
+};
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,6 +34,7 @@ bindings = "bin"
 strip = true

 [tool.ruff]
+update-check = true

 [tool.ruff.isort]
 force-wrap-aliases = true
--- a/resources/test/fixtures/flake8_implicit_str_concat/ISC.py
+++ b/resources/test/fixtures/flake8_implicit_str_concat/ISC.py
@@ -0,0 +1,36 @@
+_ = "a" "b" "c"
+
+_ = "abc" + "def"
+
+_ = "abc" \
+    "def"
+
+_ = (
+  "abc" +
+  "def"
+)
+
+_ = (
+  f"abc" +
+  "def"
+)
+
+_ = (
+  b"abc" +
+  b"def"
+)
+
+_ = (
+  "abc"
+  "def"
+)
+
+_ = (
+  f"abc"
+  "def"
+)
+
+_ = (
+  b"abc"
+  b"def"
+)
--- a/resources/test/fixtures/flake8_tidy_imports/TID251.py
+++ b/resources/test/fixtures/flake8_tidy_imports/TID251.py
@@ -0,0 +1,33 @@
+## Banned modules ##
+import cgi
+
+from cgi import *
+
+from cgi import a, b, c
+
+# banning a module also bans any submodules
+import cgi.foo.bar
+
+from cgi.foo import bar
+
+from cgi.foo.bar import *
+
+## Banned module members ##
+
+from typing import TypedDict
+
+import typing
+
+# attribute access is checked
+typing.TypedDict
+
+typing.TypedDict.anything
+
+# function calls are checked
+typing.TypedDict()
+
+typing.TypedDict.anything()
+
+# import aliases are resolved
+import typing as totally_not_typing
+totally_not_typing.TypedDict
--- a/resources/test/fixtures/flake8_tidy_imports/TID251_false_positives.py
+++ b/resources/test/fixtures/flake8_tidy_imports/TID251_false_positives.py
@@ -0,0 +1,11 @@
+# module members cannot be imported with that syntax
+import typing.TypedDict
+
+# we don't track reassignments
+import typing, other
+typing = other
+typing.TypedDict()
+
+# yet another false positive
+def foo(typing):
+    typing.TypedDict()
--- a/resources/test/fixtures/pygrep-hooks/PGH004_0.py
+++ b/resources/test/fixtures/pygrep-hooks/PGH004_0.py
@@ -0,0 +1,11 @@
+x = 1  # noqa
+x = 1  # NOQA:F401,W203
+# noqa
+# NOQA
+# noqa:F401
+# noqa:F401,W203
+
+x = 1
+x = 1  # noqa: F401, W203
+# noqa: F401
+# noqa: F401, W203
--- a/resources/test/fixtures/pyproject.toml
+++ b/resources/test/fixtures/pyproject.toml
@@ -42,6 +42,10 @@ staticmethod-decorators = ["staticmethod"]
 [tool.ruff.flake8-tidy-imports]
 ban-relative-imports = "parents"

+[tool.ruff.flake8-tidy-imports.banned-api]
+"cgi".msg = "The cgi module is deprecated."
+"typing.TypedDict".msg = "Use typing_extensions.TypedDict instead."
+
 [tool.ruff.flake8-errmsg]
 max-string-length = 20

--- a/resources/test/fixtures/pyupgrade/UP025.py
+++ b/resources/test/fixtures/pyupgrade/UP025.py
@@ -0,0 +1,27 @@
+# These should change
+x = u"Hello"
+
+u'world'
+
+print(u"Hello")
+
+print(u'world')
+
+import foo
+
+foo(u"Hello", U"world", a=u"Hello", b=u"world")
+
+# These should stay quoted they way they are
+
+x = u'hello'
+x = u"""hello"""
+x = u'''hello'''
+x = u'Hello "World"'
+
+# These should not change
+u = "Hello"
+
+u = u
+
+def hello():
+    return"Hello"
--- a/ruff.schema.json
+++ b/ruff.schema.json
@@ -364,10 +364,30 @@
      "items": {
        "$ref": "#/definitions/CheckCodePrefix"
      }
+    },
+    "update-check": {
+      "description": "Enable or disable automatic update checks (overridden by the `--update-check` and `--no-update-check` command-line flags).",
+      "type": [
+        "boolean",
+        "null"
+      ]
    }
  },
  "additionalProperties": false,
  "definitions": {
+    "BannedApi": {
+      "type": "object",
+      "required": [
+        "msg"
+      ],
+      "properties": {
+        "msg": {
+          "description": "The message to display when the API is used.",
+          "type": "string"
+        }
+      },
+      "additionalProperties": false
+    },
    "CheckCodePrefix": {
      "type": "string",
      "enum": [
@@ -663,6 +683,12 @@
        "ICN0",
        "ICN00",
        "ICN001",
+        "ISC",
+        "ISC0",
+        "ISC00",
+        "ISC001",
+        "ISC002",
+        "ISC003",
        "M",
        "M0",
        "M001",
@@ -726,6 +752,7 @@
        "PGH001",
        "PGH002",
        "PGH003",
+        "PGH004",
        "PLC",
        "PLC0",
        "PLC04",
@@ -834,6 +861,7 @@
        "TID",
        "TID2",
        "TID25",
+        "TID251",
        "TID252",
        "U",
        "U0",
@@ -883,6 +911,7 @@
        "UP021",
        "UP022",
        "UP023",
+        "UP025",
        "W",
        "W2",
        "W29",
@@ -910,10 +939,21 @@
      ]
    },
    "Convention": {
-      "type": "string",
-      "enum": [
-        "google",
-        "numpy"
+      "oneOf": [
+        {
+          "description": "Use Google-style docstrings.",
+          "type": "string",
+          "enum": [
+            "google"
+          ]
+        },
+        {
+          "description": "Use NumPy-style docstrings.",
+          "type": "string",
+          "enum": [
+            "numpy"
+          ]
+        }
      ]
    },
    "Flake8AnnotationsOptions": {
@@ -1057,7 +1097,7 @@
      "type": "object",
      "properties": {
        "ban-relative-imports": {
-          "description": "Whether to ban all relative imports (`\"all\"`), or only those imports that extend into the parent module and beyond (`\"parents\"`).",
+          "description": "Whether to ban all relative imports (`\"all\"`), or only those imports that extend into the parent module or beyond (`\"parents\"`).",
          "anyOf": [
            {
              "$ref": "#/definitions/Strictness"
@@ -1066,6 +1106,16 @@
              "type": "null"
            }
          ]
+        },
+        "banned-api": {
+          "description": "Specific modules or module members that may not be imported or accessed. Note that this check is only meant to flag accidental uses, and can be circumvented via `eval` or `importlib`.",
+          "type": [
+            "object",
+            "null"
+          ],
+          "additionalProperties": {
+            "$ref": "#/definitions/BannedApi"
+          }
        }
      },
      "additionalProperties": false
@@ -1253,10 +1303,21 @@
      ]
    },
    "Quote": {
-      "type": "string",
-      "enum": [
-        "single",
-        "double"
+      "oneOf": [
+        {
+          "description": "Use single quotes (`'`).",
+          "type": "string",
+          "enum": [
+            "single"
+          ]
+        },
+        {
+          "description": "Use double quotes (`\"`).",
+          "type": "string",
+          "enum": [
+            "double"
+          ]
+        }
      ]
    },
    "SerializationFormat": {
@@ -1271,10 +1332,21 @@
      ]
    },
    "Strictness": {
-      "type": "string",
-      "enum": [
-        "parents",
-        "all"
+      "oneOf": [
+        {
+          "description": "Ban imports that extend into the parent module or beyond.",
+          "type": "string",
+          "enum": [
+            "parents"
+          ]
+        },
+        {
+          "description": "Ban all relative imports.",
+          "type": "string",
+          "enum": [
+            "all"
+          ]
+        }
      ]
    },
    "Version": {
--- a/ruff_dev/Cargo.toml
+++ b/ruff_dev/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruff_dev"
-version = "0.0.199"
+version = "0.0.202"
 edition = "2021"

 [dependencies]
--- a/ruff_dev/src/generate_all.rs
+++ b/ruff_dev/src/generate_all.rs
@@ -4,8 +4,7 @@ use anyhow::Result;
 use clap::Args;

 use crate::{
-    generate_check_code_prefix, generate_json_schema, generate_options,
-    generate_playground_options, generate_rules_table,
+    generate_check_code_prefix, generate_json_schema, generate_options, generate_rules_table,
 };

 #[derive(Args)]
@@ -28,8 +27,5 @@ pub fn main(cli: &Cli) -> Result<()> {
    generate_options::main(&generate_options::Cli {
        dry_run: cli.dry_run,
    })?;
-    generate_playground_options::main(&generate_playground_options::Cli {
-        dry_run: cli.dry_run,
-    })?;
    Ok(())
 }
--- a/ruff_dev/src/generate_playground_options.rs
+++ b/ruff_dev/src/generate_playground_options.rs
@@ -1,142 +0,0 @@
-//! Generate typescript file defining options to be used by the web playground.
-
-use std::fs::OpenOptions;
-use std::io::Write;
-use std::path::PathBuf;
-
-use anyhow::Result;
-use clap::Args;
-use itertools::Itertools;
-use ruff::settings::options::Options;
-use ruff::settings::options_base::{ConfigurationOptions, OptionEntry, OptionField};
-
-#[derive(Args)]
-pub struct Cli {
-    /// Write the generated table to stdout (rather than to `TODO`).
-    #[arg(long)]
-    pub(crate) dry_run: bool,
-}
-
-fn emit_field(output: &mut String, field: &OptionField) {
-    output.push_str(&textwrap::indent(
-        &textwrap::dedent(&format!(
-            "
-        {{
-            \"name\": \"{}\",
-            \"default\": '{}',
-            \"type\": '{}',
-        }},",
-            field.name, field.default, field.value_type
-        )),
-        "    ",
-    ));
-}
-
-pub fn main(cli: &Cli) -> Result<()> {
-    let mut output = String::new();
-
-    // Generate all the top-level fields.
-    output.push_str(&format!("{{\"name\": \"{}\", \"fields\": [", "globals"));
-    for field in Options::get_available_options()
-        .into_iter()
-        .filter_map(|entry| {
-            if let OptionEntry::Field(field) = entry {
-                Some(field)
-            } else {
-                None
-            }
-        })
-        // Filter out options that don't make sense in the playground.
-        .filter(|field| {
-            !matches!(
-                field.name,
-                "src"
-                    | "fix"
-                    | "format"
-                    | "exclude"
-                    | "extend"
-                    | "extend-exclude"
-                    | "fixable"
-                    | "force-exclude"
-                    | "ignore-init-module-imports"
-                    | "respect-gitignore"
-                    | "show-source"
-                    | "cache-dir"
-                    | "per-file-ignores"
-            )
-        })
-        .sorted_by_key(|field| field.name)
-    {
-        emit_field(&mut output, &field);
-    }
-    output.push_str("\n]},\n");
-
-    // Generate all the sub-groups.
-    for group in Options::get_available_options()
-        .into_iter()
-        .filter_map(|entry| {
-            if let OptionEntry::Group(group) = entry {
-                Some(group)
-            } else {
-                None
-            }
-        })
-        .sorted_by_key(|group| group.name)
-    {
-        output.push_str(&format!("{{\"name\": \"{}\", \"fields\": [", group.name));
-        for field in group
-            .fields
-            .iter()
-            .filter_map(|entry| {
-                if let OptionEntry::Field(field) = entry {
-                    Some(field)
-                } else {
-                    None
-                }
-            })
-            .sorted_by_key(|field| field.name)
-        {
-            emit_field(&mut output, field);
-        }
-        output.push_str("\n]},\n");
-    }
-
-    let prefix = textwrap::dedent(
-        r"
-        // This file is auto-generated by `cargo dev generate-playground-options`.
-        export interface OptionGroup {
-            name: string;
-            fields: {
-                name: string;
-                default: string;
-                type: string;
-            }[];
-        };
-
-        export const AVAILABLE_OPTIONS: OptionGroup[] = [
-    ",
-    );
-    let postfix = "];";
-
-    if cli.dry_run {
-        print!("{output}");
-    } else {
-        let file = PathBuf::from(env!("CARGO_MANIFEST_DIR"))
-            .parent()
-            .expect("Failed to find root directory")
-            .join("playground")
-            .join("src")
-            .join("ruff_options.ts");
-
-        let mut f = OpenOptions::new()
-            .create(true)
-            .write(true)
-            .truncate(true)
-            .open(file)?;
-        write!(f, "{prefix}")?;
-        write!(f, "{}", textwrap::indent(&output, "    "))?;
-        write!(f, "{postfix}")?;
-    }
-
-    Ok(())
-}
--- a/ruff_dev/src/lib.rs
+++ b/ruff_dev/src/lib.rs
@@ -15,7 +15,6 @@ pub mod generate_all;
 pub mod generate_check_code_prefix;
 pub mod generate_json_schema;
 pub mod generate_options;
-pub mod generate_playground_options;
 pub mod generate_rules_table;
 pub mod print_ast;
 pub mod print_cst;
--- a/ruff_dev/src/main.rs
+++ b/ruff_dev/src/main.rs
@@ -15,8 +15,7 @@ use anyhow::Result;
 use clap::{Parser, Subcommand};
 use ruff_dev::{
    generate_all, generate_check_code_prefix, generate_json_schema, generate_options,
-    generate_playground_options, generate_rules_table, print_ast, print_cst, print_tokens,
-    round_trip,
+    generate_rules_table, print_ast, print_cst, print_tokens, round_trip,
 };

 #[derive(Parser)]
@@ -39,9 +38,6 @@ enum Commands {
    GenerateRulesTable(generate_rules_table::Cli),
    /// Generate a Markdown-compatible listing of configuration options.
    GenerateOptions(generate_options::Cli),
-    /// Generate typescript file defining options to be used by the web
-    /// playground.
-    GeneratePlaygroundOptions(generate_playground_options::Cli),
    /// Print the AST for a given Python file.
    PrintAST(print_ast::Cli),
    /// Print the LibCST CST for a given Python file.
@@ -60,7 +56,6 @@ fn main() -> Result<()> {
        Commands::GenerateJSONSchema(args) => generate_json_schema::main(args)?,
        Commands::GenerateRulesTable(args) => generate_rules_table::main(args)?,
        Commands::GenerateOptions(args) => generate_options::main(args)?,
-        Commands::GeneratePlaygroundOptions(args) => generate_playground_options::main(args)?,
        Commands::PrintAST(args) => print_ast::main(args)?,
        Commands::PrintCST(args) => print_cst::main(args)?,
        Commands::PrintTokens(args) => print_tokens::main(args)?,
--- a/ruff_macros/Cargo.toml
+++ b/ruff_macros/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruff_macros"
-version = "0.0.199"
+version = "0.0.202"
 edition = "2021"

 [lib]
--- a/src/checkers/ast.rs
+++ b/src/checkers/ast.rs
@@ -39,10 +39,10 @@ use crate::visibility::{module_visibility, transition_scope, Modifier, Visibilit
 use crate::{
    docstrings, flake8_2020, flake8_annotations, flake8_bandit, flake8_blind_except,
    flake8_boolean_trap, flake8_bugbear, flake8_builtins, flake8_comprehensions, flake8_datetimez,
-    flake8_debugger, flake8_errmsg, flake8_import_conventions, flake8_print, flake8_return,
-    flake8_simplify, flake8_tidy_imports, flake8_unused_arguments, mccabe, noqa, pandas_vet,
-    pep8_naming, pycodestyle, pydocstyle, pyflakes, pygrep_hooks, pylint, pyupgrade, ruff,
-    visibility,
+    flake8_debugger, flake8_errmsg, flake8_implicit_str_concat, flake8_import_conventions,
+    flake8_print, flake8_return, flake8_simplify, flake8_tidy_imports, flake8_unused_arguments,
+    mccabe, noqa, pandas_vet, pep8_naming, pycodestyle, pydocstyle, pyflakes, pygrep_hooks, pylint,
+    pyupgrade, ruff, visibility,
 };

 const GLOBAL_SCOPE_INDEX: usize = 0;
@@ -397,10 +397,9 @@ where
                ..
            } => {
                if self.settings.enabled.contains(&CheckCode::E743) {
-                    if let Some(check) = pycodestyle::checks::ambiguous_function_name(
-                        name,
-                        Range::from_located(stmt),
-                    ) {
+                    if let Some(check) = pycodestyle::checks::ambiguous_function_name(name, || {
+                        helpers::identifier_range(stmt, self.locator)
+                    }) {
                        self.add_check(check);
                    }
                }
@@ -585,9 +584,9 @@ where
                }

                if self.settings.enabled.contains(&CheckCode::E742) {
-                    if let Some(check) =
-                        pycodestyle::checks::ambiguous_class_name(name, Range::from_located(stmt))
-                    {
+                    if let Some(check) = pycodestyle::checks::ambiguous_class_name(name, || {
+                        helpers::identifier_range(stmt, self.locator)
+                    }) {
                        self.add_check(check);
                    }
                }
@@ -723,6 +722,17 @@ where
                        }
                    }

+                    // flake8_tidy_imports
+                    if self.settings.enabled.contains(&CheckCode::TID251) {
+                        if let Some(check) = flake8_tidy_imports::checks::name_or_parent_is_banned(
+                            alias,
+                            &alias.node.name,
+                            &self.settings.flake8_tidy_imports.banned_api,
+                        ) {
+                            self.add_check(check);
+                        }
+                    }
+
                    // pylint
                    if self.settings.enabled.contains(&CheckCode::PLC0414) {
                        pylint::plugins::useless_import_alias(self, alias);
@@ -854,6 +864,27 @@ where
                    }
                }

+                if self.settings.enabled.contains(&CheckCode::TID251) {
+                    if let Some(module) = module {
+                        for name in names {
+                            if let Some(check) = flake8_tidy_imports::checks::name_is_banned(
+                                module,
+                                name,
+                                &self.settings.flake8_tidy_imports.banned_api,
+                            ) {
+                                self.add_check(check);
+                            }
+                        }
+                        if let Some(check) = flake8_tidy_imports::checks::name_or_parent_is_banned(
+                            stmt,
+                            module,
+                            &self.settings.flake8_tidy_imports.banned_api,
+                        ) {
+                            self.add_check(check);
+                        }
+                    }
+                }
+
                for alias in names {
                    if let Some("__future__") = module.as_deref() {
                        let name = alias.node.asname.as_ref().unwrap_or(&alias.node.name);
@@ -1586,6 +1617,15 @@ where
                        };
                    }
                }
+
+                if self.settings.enabled.contains(&CheckCode::TID251) {
+                    flake8_tidy_imports::checks::banned_attribute_access(
+                        self,
+                        &dealias_call_path(collect_call_paths(expr), &self.import_aliases),
+                        expr,
+                        &self.settings.flake8_tidy_imports.banned_api,
+                    );
+                }
            }
            ExprKind::Call {
                func,
@@ -2230,6 +2270,15 @@ where
                    }
                }
            }
+            ExprKind::BinOp {
+                op: Operator::Add, ..
+            } => {
+                if self.settings.enabled.contains(&CheckCode::ISC003) {
+                    if let Some(check) = flake8_implicit_str_concat::checks::explicit(expr) {
+                        self.add_check(check);
+                    }
+                }
+            }
            ExprKind::UnaryOp { op, operand } => {
                let check_not_in = self.settings.enabled.contains(&CheckCode::E713);
                let check_not_is = self.settings.enabled.contains(&CheckCode::E714);
@@ -2329,7 +2378,7 @@ where
            }
            ExprKind::Constant {
                value: Constant::Str(value),
-                ..
+                kind,
            } => {
                if self.in_type_definition && !self.in_literal {
                    self.deferred_string_type_definitions.push((
@@ -2347,6 +2396,9 @@ where
                        self.add_check(check);
                    }
                }
+                if self.settings.enabled.contains(&CheckCode::UP025) {
+                    pyupgrade::plugins::rewrite_unicode_literal(self, expr, value, kind);
+                }
            }
            ExprKind::Lambda { args, body, .. } => {
                // Visit the arguments, but avoid the body, which will be deferred.
--- a/src/checkers/lines.rs
+++ b/src/checkers/lines.rs
@@ -2,7 +2,7 @@

 use crate::checks::{Check, CheckCode};
 use crate::pycodestyle::checks::{line_too_long, no_newline_at_end_of_file};
-use crate::pygrep_hooks::plugins::blanket_type_ignore;
+use crate::pygrep_hooks::plugins::{blanket_noqa, blanket_type_ignore};
 use crate::pyupgrade::checks::unnecessary_coding_comment;
 use crate::settings::{flags, Settings};

@@ -18,6 +18,7 @@ pub fn check_lines(
    let enforce_line_too_long = settings.enabled.contains(&CheckCode::E501);
    let enforce_no_newline_at_end_of_file = settings.enabled.contains(&CheckCode::W292);
    let enforce_blanket_type_ignore = settings.enabled.contains(&CheckCode::PGH003);
+    let enforce_blanket_noqa = settings.enabled.contains(&CheckCode::PGH004);

    let mut commented_lines_iter = commented_lines.iter().peekable();
    for (index, line) in contents.lines().enumerate() {
@@ -45,6 +46,14 @@ pub fn check_lines(
                    }
                }
            }
+
+            if enforce_blanket_noqa {
+                if commented_lines.contains(&(index + 1)) {
+                    if let Some(check) = blanket_noqa(index, line) {
+                        checks.push(check);
+                    }
+                }
+            }
        }

        if enforce_line_too_long {
--- a/src/checkers/noqa.rs
+++ b/src/checkers/noqa.rs
@@ -49,6 +49,9 @@ pub fn check_noqa(
        while let Some((index, check)) =
            checks_iter.next_if(|(_index, check)| check.location.row() <= *lineno)
        {
+            if check.kind == CheckKind::BlanketNOQA {
+                continue;
+            }
            // Grab the noqa (logical) line number for the current (physical) line.
            // If there are newlines at the end of the file, they won't be represented in
            // `noqa_line_for`, so fallback to the current line.
--- a/src/checkers/tokens.rs
+++ b/src/checkers/tokens.rs
@@ -7,7 +7,7 @@ use crate::lex::docstring_detection::StateMachine;
 use crate::ruff::checks::Context;
 use crate::settings::flags;
 use crate::source_code_locator::SourceCodeLocator;
-use crate::{eradicate, flake8_quotes, pycodestyle, ruff, Settings};
+use crate::{eradicate, flake8_implicit_str_concat, flake8_quotes, pycodestyle, ruff, Settings};

 pub fn check_tokens(
    locator: &SourceCodeLocator,
@@ -26,6 +26,8 @@ pub fn check_tokens(
        || settings.enabled.contains(&CheckCode::Q003);
    let enforce_commented_out_code = settings.enabled.contains(&CheckCode::ERA001);
    let enforce_invalid_escape_sequence = settings.enabled.contains(&CheckCode::W605);
+    let enforce_implicit_string_concatenation = settings.enabled.contains(&CheckCode::ISC001)
+        || settings.enabled.contains(&CheckCode::ISC002);

    let mut state_machine = StateMachine::default();
    for &(start, ref tok, end) in tokens.iter().flatten() {
@@ -99,5 +101,14 @@ pub fn check_tokens(
        }
    }

+    // ISC001, ISC002
+    if enforce_implicit_string_concatenation {
+        checks.extend(
+            flake8_implicit_str_concat::checks::implicit(tokens, locator)
+                .into_iter()
+                .filter(|check| settings.enabled.contains(check.kind.code())),
+        );
+    }
+
    checks
 }
--- a/src/checks.rs
+++ b/src/checks.rs
@@ -165,6 +165,7 @@ pub enum CheckCode {
    // mccabe
    C901,
    // flake8-tidy-imports
+    TID251,
    TID252,
    // flake8-return
    RET501,
@@ -175,6 +176,10 @@ pub enum CheckCode {
    RET506,
    RET507,
    RET508,
+    // flake8-implicit-str-concat
+    ISC001,
+    ISC002,
+    ISC003,
    // flake8-print
    T201,
    T203,
@@ -231,6 +236,7 @@ pub enum CheckCode {
    UP021,
    UP022,
    UP023,
+    UP025,
    // pydocstyle
    D100,
    D101,
@@ -336,6 +342,7 @@ pub enum CheckCode {
    PGH001,
    PGH002,
    PGH003,
+    PGH004,
    // pandas-vet
    PD002,
    PD003,
@@ -374,6 +381,7 @@ pub enum CheckCategory {
    Flake8Comprehensions,
    Flake8Debugger,
    Flake8ErrMsg,
+    Flake8ImplicitStrConcat,
    Flake8ImportConventions,
    Flake8Print,
    Flake8Quotes,
@@ -417,6 +425,7 @@ impl CheckCategory {
            CheckCategory::Flake8Comprehensions => "flake8-comprehensions",
            CheckCategory::Flake8Debugger => "flake8-debugger",
            CheckCategory::Flake8ErrMsg => "flake8-errmsg",
+            CheckCategory::Flake8ImplicitStrConcat => "flake8-implicit-str-concat",
            CheckCategory::Flake8ImportConventions => "flake8-import-conventions",
            CheckCategory::Flake8Print => "flake8-print",
            CheckCategory::Flake8Quotes => "flake8-quotes",
@@ -450,19 +459,21 @@ impl CheckCategory {
            CheckCategory::Flake8Bugbear => vec![CheckCodePrefix::B],
            CheckCategory::Flake8Builtins => vec![CheckCodePrefix::A],
            CheckCategory::Flake8Comprehensions => vec![CheckCodePrefix::C4],
+            CheckCategory::Flake8Datetimez => vec![CheckCodePrefix::DTZ],
            CheckCategory::Flake8Debugger => vec![CheckCodePrefix::T10],
            CheckCategory::Flake8ErrMsg => vec![CheckCodePrefix::EM],
+            CheckCategory::Flake8ImplicitStrConcat => vec![CheckCodePrefix::ISC],
+            CheckCategory::Flake8ImportConventions => vec![CheckCodePrefix::ICN],
            CheckCategory::Flake8Print => vec![CheckCodePrefix::T20],
            CheckCategory::Flake8Quotes => vec![CheckCodePrefix::Q],
            CheckCategory::Flake8Return => vec![CheckCodePrefix::RET],
            CheckCategory::Flake8Simplify => vec![CheckCodePrefix::SIM],
            CheckCategory::Flake8TidyImports => vec![CheckCodePrefix::TID],
            CheckCategory::Flake8UnusedArguments => vec![CheckCodePrefix::ARG],
-            CheckCategory::Flake8Datetimez => vec![CheckCodePrefix::DTZ],
            CheckCategory::Isort => vec![CheckCodePrefix::I],
            CheckCategory::McCabe => vec![CheckCodePrefix::C90],
-            CheckCategory::PandasVet => vec![CheckCodePrefix::PD],
            CheckCategory::PEP8Naming => vec![CheckCodePrefix::N],
+            CheckCategory::PandasVet => vec![CheckCodePrefix::PD],
            CheckCategory::Pycodestyle => vec![CheckCodePrefix::E, CheckCodePrefix::W],
            CheckCategory::Pydocstyle => vec![CheckCodePrefix::D],
            CheckCategory::Pyflakes => vec![CheckCodePrefix::F],
@@ -474,7 +485,6 @@ impl CheckCategory {
                CheckCodePrefix::PLW,
            ],
            CheckCategory::Pyupgrade => vec![CheckCodePrefix::UP],
-            CheckCategory::Flake8ImportConventions => vec![CheckCodePrefix::ICN],
            CheckCategory::Ruff => vec![CheckCodePrefix::RUF],
        }
    }
@@ -524,6 +534,10 @@ impl CheckCategory {
                "https://pypi.org/project/flake8-errmsg/0.4.0/",
                &Platform::PyPI,
            )),
+            CheckCategory::Flake8ImplicitStrConcat => Some((
+                "https://pypi.org/project/flake8-implicit-str-concat/0.3.0/",
+                &Platform::PyPI,
+            )),
            CheckCategory::Flake8ImportConventions => None,
            CheckCategory::Flake8Print => Some((
                "https://pypi.org/project/flake8-print/5.0.0/",
@@ -782,6 +796,7 @@ pub enum CheckKind {
    // flake8-debugger
    Debugger(DebuggerUsingType),
    // flake8-tidy-imports
+    BannedApi { name: String, message: String },
    BannedRelativeImport(Strictness),
    // flake8-return
    UnnecessaryReturnNone,
@@ -792,6 +807,10 @@ pub enum CheckKind {
    SuperfluousElseRaise(Branch),
    SuperfluousElseContinue(Branch),
    SuperfluousElseBreak(Branch),
+    // flake8-implicit-str-concat
+    SingleLineImplicitStringConcatenation,
+    MultiLineImplicitStringConcatenation,
+    ExplicitStringConcatenation,
    // flake8-print
    PrintFound,
    PPrintFound,
@@ -848,6 +867,7 @@ pub enum CheckKind {
    ReplaceUniversalNewlines,
    ReplaceStdoutStderr,
    RewriteCElementTree,
+    RewriteUnicodeLiteral,
    // pydocstyle
    BlankLineAfterLastSection(String),
    BlankLineAfterSection(String),
@@ -931,6 +951,7 @@ pub enum CheckKind {
    NoEval,
    DeprecatedLogWarn,
    BlanketTypeIgnore,
+    BlanketNOQA,
    // flake8-unused-arguments
    UnusedFunctionArgument(String),
    UnusedMethodArgument(String),
@@ -980,10 +1001,14 @@ impl CheckCode {
    pub fn lint_source(&self) -> &'static LintSource {
        match self {
            CheckCode::RUF100 => &LintSource::NoQA,
-            CheckCode::E501 | CheckCode::W292 | CheckCode::UP009 | CheckCode::PGH003 => {
-                &LintSource::Lines
-            }
+            CheckCode::E501
+            | CheckCode::W292
+            | CheckCode::UP009
+            | CheckCode::PGH003
+            | CheckCode::PGH004 => &LintSource::Lines,
            CheckCode::ERA001
+            | CheckCode::ISC001
+            | CheckCode::ISC002
            | CheckCode::Q000
            | CheckCode::Q001
            | CheckCode::Q002
@@ -1158,6 +1183,10 @@ impl CheckCode {
            // flake8-debugger
            CheckCode::T100 => CheckKind::Debugger(DebuggerUsingType::Import("...".to_string())),
            // flake8-tidy-imports
+            CheckCode::TID251 => CheckKind::BannedApi {
+                name: "...".to_string(),
+                message: "...".to_string(),
+            },
            CheckCode::TID252 => CheckKind::BannedRelativeImport(Strictness::All),
            // flake8-return
            CheckCode::RET501 => CheckKind::UnnecessaryReturnNone,
@@ -1168,6 +1197,10 @@ impl CheckCode {
            CheckCode::RET506 => CheckKind::SuperfluousElseRaise(Branch::Else),
            CheckCode::RET507 => CheckKind::SuperfluousElseContinue(Branch::Else),
            CheckCode::RET508 => CheckKind::SuperfluousElseBreak(Branch::Else),
+            // flake8-implicit-str-concat
+            CheckCode::ISC001 => CheckKind::SingleLineImplicitStringConcatenation,
+            CheckCode::ISC002 => CheckKind::MultiLineImplicitStringConcatenation,
+            CheckCode::ISC003 => CheckKind::ExplicitStringConcatenation,
            // flake8-print
            CheckCode::T201 => CheckKind::PrintFound,
            CheckCode::T203 => CheckKind::PPrintFound,
@@ -1229,6 +1262,7 @@ impl CheckCode {
            CheckCode::UP021 => CheckKind::ReplaceUniversalNewlines,
            CheckCode::UP022 => CheckKind::ReplaceStdoutStderr,
            CheckCode::UP023 => CheckKind::RewriteCElementTree,
+            CheckCode::UP025 => CheckKind::RewriteUnicodeLiteral,
            // pydocstyle
            CheckCode::D100 => CheckKind::PublicModule,
            CheckCode::D101 => CheckKind::PublicClass,
@@ -1327,6 +1361,7 @@ impl CheckCode {
            CheckCode::PGH001 => CheckKind::NoEval,
            CheckCode::PGH002 => CheckKind::DeprecatedLogWarn,
            CheckCode::PGH003 => CheckKind::BlanketTypeIgnore,
+            CheckCode::PGH004 => CheckKind::BlanketNOQA,
            // flake8-unused-arguments
            CheckCode::ARG001 => CheckKind::UnusedFunctionArgument("...".to_string()),
            CheckCode::ARG002 => CheckKind::UnusedMethodArgument("...".to_string()),
@@ -1562,8 +1597,10 @@ impl CheckCode {
            CheckCode::FBT002 => CheckCategory::Flake8BooleanTrap,
            CheckCode::FBT003 => CheckCategory::Flake8BooleanTrap,
            CheckCode::I001 => CheckCategory::Isort,
-            CheckCode::TID252 => CheckCategory::Flake8TidyImports,
            CheckCode::ICN001 => CheckCategory::Flake8ImportConventions,
+            CheckCode::ISC001 => CheckCategory::Flake8ImplicitStrConcat,
+            CheckCode::ISC002 => CheckCategory::Flake8ImplicitStrConcat,
+            CheckCode::ISC003 => CheckCategory::Flake8ImplicitStrConcat,
            CheckCode::N801 => CheckCategory::PEP8Naming,
            CheckCode::N802 => CheckCategory::PEP8Naming,
            CheckCode::N803 => CheckCategory::PEP8Naming,
@@ -1594,6 +1631,7 @@ impl CheckCode {
            CheckCode::PGH001 => CheckCategory::PygrepHooks,
            CheckCode::PGH002 => CheckCategory::PygrepHooks,
            CheckCode::PGH003 => CheckCategory::PygrepHooks,
+            CheckCode::PGH004 => CheckCategory::PygrepHooks,
            CheckCode::PLC0414 => CheckCategory::Pylint,
            CheckCode::PLC2201 => CheckCategory::Pylint,
            CheckCode::PLC3002 => CheckCategory::Pylint,
@@ -1633,6 +1671,8 @@ impl CheckCode {
            CheckCode::T100 => CheckCategory::Flake8Debugger,
            CheckCode::T201 => CheckCategory::Flake8Print,
            CheckCode::T203 => CheckCategory::Flake8Print,
+            CheckCode::TID251 => CheckCategory::Flake8TidyImports,
+            CheckCode::TID252 => CheckCategory::Flake8TidyImports,
            CheckCode::UP001 => CheckCategory::Pyupgrade,
            CheckCode::UP003 => CheckCategory::Pyupgrade,
            CheckCode::UP004 => CheckCategory::Pyupgrade,
@@ -1655,6 +1695,7 @@ impl CheckCode {
            CheckCode::UP021 => CheckCategory::Pyupgrade,
            CheckCode::UP022 => CheckCategory::Pyupgrade,
            CheckCode::UP023 => CheckCategory::Pyupgrade,
+            CheckCode::UP025 => CheckCategory::Pyupgrade,
            CheckCode::W292 => CheckCategory::Pycodestyle,
            CheckCode::W605 => CheckCategory::Pycodestyle,
            CheckCode::YTT101 => CheckCategory::Flake82020,
@@ -1806,6 +1847,7 @@ impl CheckKind {
            // flake8-debugger
            CheckKind::Debugger(..) => &CheckCode::T100,
            // flake8-tidy-imports
+            CheckKind::BannedApi { .. } => &CheckCode::TID251,
            CheckKind::BannedRelativeImport(..) => &CheckCode::TID252,
            // flake8-return
            CheckKind::UnnecessaryReturnNone => &CheckCode::RET501,
@@ -1816,6 +1858,10 @@ impl CheckKind {
            CheckKind::SuperfluousElseRaise(..) => &CheckCode::RET506,
            CheckKind::SuperfluousElseContinue(..) => &CheckCode::RET507,
            CheckKind::SuperfluousElseBreak(..) => &CheckCode::RET508,
+            // flake8-implicit-str-concat
+            CheckKind::SingleLineImplicitStringConcatenation => &CheckCode::ISC001,
+            CheckKind::MultiLineImplicitStringConcatenation => &CheckCode::ISC002,
+            CheckKind::ExplicitStringConcatenation => &CheckCode::ISC003,
            // flake8-print
            CheckKind::PrintFound => &CheckCode::T201,
            CheckKind::PPrintFound => &CheckCode::T203,
@@ -1872,6 +1918,7 @@ impl CheckKind {
            CheckKind::ReplaceUniversalNewlines => &CheckCode::UP021,
            CheckKind::ReplaceStdoutStderr => &CheckCode::UP022,
            CheckKind::RewriteCElementTree => &CheckCode::UP023,
+            CheckKind::RewriteUnicodeLiteral => &CheckCode::UP025,
            // pydocstyle
            CheckKind::BlankLineAfterLastSection(..) => &CheckCode::D413,
            CheckKind::BlankLineAfterSection(..) => &CheckCode::D410,
@@ -1955,6 +2002,7 @@ impl CheckKind {
            CheckKind::NoEval => &CheckCode::PGH001,
            CheckKind::DeprecatedLogWarn => &CheckCode::PGH002,
            CheckKind::BlanketTypeIgnore => &CheckCode::PGH003,
+            CheckKind::BlanketNOQA => &CheckCode::PGH004,
            // flake8-unused-arguments
            CheckKind::UnusedFunctionArgument(..) => &CheckCode::ARG001,
            CheckKind::UnusedMethodArgument(..) => &CheckCode::ARG002,
@@ -2432,6 +2480,7 @@ impl CheckKind {
                DebuggerUsingType::Import(name) => format!("Import for `{name}` found"),
            },
            // flake8-tidy-imports
+            CheckKind::BannedApi { name, message } => format!("`{name}` is banned: {message}"),
            CheckKind::BannedRelativeImport(strictness) => match strictness {
                Strictness::Parents => {
                    "Relative imports from parent modules are banned".to_string()
@@ -2463,6 +2512,16 @@ impl CheckKind {
            CheckKind::SuperfluousElseBreak(branch) => {
                format!("Unnecessary `{branch}` after `break` statement")
            }
+            // flake8-implicit-str-concat
+            CheckKind::SingleLineImplicitStringConcatenation => {
+                "Implicitly concatenated string literals on one line".to_string()
+            }
+            CheckKind::MultiLineImplicitStringConcatenation => {
+                "Implicitly concatenated string literals over continuation line".to_string()
+            }
+            CheckKind::ExplicitStringConcatenation => {
+                "Explicitly concatenated string should be implicitly concatenated".to_string()
+            }
            // flake8-print
            CheckKind::PrintFound => "`print` found".to_string(),
            CheckKind::PPrintFound => "`pprint` found".to_string(),
@@ -2611,6 +2670,7 @@ impl CheckKind {
            CheckKind::RewriteCElementTree => {
                "`cElementTree` is deprecated, use `ElementTree`".to_string()
            }
+            CheckKind::RewriteUnicodeLiteral => "Remove unicode literals from strings".to_string(),
            CheckKind::ConvertNamedTupleFunctionalToClass(name) => {
                format!("Convert `{name}` from `NamedTuple` functional to class syntax")
            }
@@ -2816,13 +2876,14 @@ impl CheckKind {
                "Boolean positional value in function call".to_string()
            }
            // pygrep-hooks
-            CheckKind::NoEval => "No builtin `eval()` allowed".to_string(),
-            CheckKind::DeprecatedLogWarn => {
-                "`warn` is deprecated in favor of `warning`".to_string()
-            }
+            CheckKind::BlanketNOQA => "Use specific error codes when using `noqa`".to_string(),
            CheckKind::BlanketTypeIgnore => {
                "Use specific error codes when ignoring type issues".to_string()
            }
+            CheckKind::DeprecatedLogWarn => {
+                "`warn` is deprecated in favor of `warning`".to_string()
+            }
+            CheckKind::NoEval => "No builtin `eval()` allowed".to_string(),
            // flake8-unused-arguments
            CheckKind::UnusedFunctionArgument(name) => {
                format!("Unused function argument: `{name}`")
@@ -3058,6 +3119,7 @@ impl CheckKind {
                | CheckKind::ReplaceUniversalNewlines
                | CheckKind::ReplaceStdoutStderr
                | CheckKind::RewriteCElementTree
+                | CheckKind::RewriteUnicodeLiteral
                | CheckKind::NewLineAfterSectionName(..)
                | CheckKind::NoBlankLineAfterFunction(..)
                | CheckKind::NoBlankLineBeforeClass(..)
--- a/src/checks_gen.rs
+++ b/src/checks_gen.rs
@@ -314,6 +314,12 @@ pub enum CheckCodePrefix {
    ICN0,
    ICN00,
    ICN001,
+    ISC,
+    ISC0,
+    ISC00,
+    ISC001,
+    ISC002,
+    ISC003,
    M,
    M0,
    M001,
@@ -377,6 +383,7 @@ pub enum CheckCodePrefix {
    PGH001,
    PGH002,
    PGH003,
+    PGH004,
    PLC,
    PLC0,
    PLC04,
@@ -485,6 +492,7 @@ pub enum CheckCodePrefix {
    TID,
    TID2,
    TID25,
+    TID251,
    TID252,
    U,
    U0,
@@ -534,6 +542,7 @@ pub enum CheckCodePrefix {
    UP021,
    UP022,
    UP023,
+    UP025,
    W,
    W2,
    W29,
@@ -704,6 +713,7 @@ impl CheckCodePrefix {
                CheckCode::C417,
                CheckCode::T100,
                CheckCode::C901,
+                CheckCode::TID251,
                CheckCode::TID252,
                CheckCode::RET501,
                CheckCode::RET502,
@@ -713,6 +723,9 @@ impl CheckCodePrefix {
                CheckCode::RET506,
                CheckCode::RET507,
                CheckCode::RET508,
+                CheckCode::ISC001,
+                CheckCode::ISC002,
+                CheckCode::ISC003,
                CheckCode::T201,
                CheckCode::T203,
                CheckCode::Q000,
@@ -763,6 +776,7 @@ impl CheckCodePrefix {
                CheckCode::UP021,
                CheckCode::UP022,
                CheckCode::UP023,
+                CheckCode::UP025,
                CheckCode::D100,
                CheckCode::D101,
                CheckCode::D102,
@@ -857,6 +871,7 @@ impl CheckCodePrefix {
                CheckCode::PGH001,
                CheckCode::PGH002,
                CheckCode::PGH003,
+                CheckCode::PGH004,
                CheckCode::PD002,
                CheckCode::PD003,
                CheckCode::PD004,
@@ -1660,7 +1675,7 @@ impl CheckCodePrefix {
                    ":".bold(),
                    "`I2` has been remapped to `TID2`".bold()
                );
-                vec![CheckCode::TID252]
+                vec![CheckCode::TID251, CheckCode::TID252]
            }
            CheckCodePrefix::I25 => {
                one_time_warning!(
@@ -1669,7 +1684,7 @@ impl CheckCodePrefix {
                    ":".bold(),
                    "`I25` has been remapped to `TID25`".bold()
                );
-                vec![CheckCode::TID252]
+                vec![CheckCode::TID251, CheckCode::TID252]
            }
            CheckCodePrefix::I252 => {
                one_time_warning!(
@@ -1738,6 +1753,12 @@ impl CheckCodePrefix {
            CheckCodePrefix::ICN0 => vec![CheckCode::ICN001],
            CheckCodePrefix::ICN00 => vec![CheckCode::ICN001],
            CheckCodePrefix::ICN001 => vec![CheckCode::ICN001],
+            CheckCodePrefix::ISC => vec![CheckCode::ISC001, CheckCode::ISC002, CheckCode::ISC003],
+            CheckCodePrefix::ISC0 => vec![CheckCode::ISC001, CheckCode::ISC002, CheckCode::ISC003],
+            CheckCodePrefix::ISC00 => vec![CheckCode::ISC001, CheckCode::ISC002, CheckCode::ISC003],
+            CheckCodePrefix::ISC001 => vec![CheckCode::ISC001],
+            CheckCodePrefix::ISC002 => vec![CheckCode::ISC002],
+            CheckCodePrefix::ISC003 => vec![CheckCode::ISC003],
            CheckCodePrefix::M => {
                one_time_warning!(
                    "{}{} {}",
@@ -2073,12 +2094,28 @@ impl CheckCodePrefix {
                );
                vec![CheckCode::PD901]
            }
-            CheckCodePrefix::PGH => vec![CheckCode::PGH001, CheckCode::PGH002, CheckCode::PGH003],
-            CheckCodePrefix::PGH0 => vec![CheckCode::PGH001, CheckCode::PGH002, CheckCode::PGH003],
-            CheckCodePrefix::PGH00 => vec![CheckCode::PGH001, CheckCode::PGH002, CheckCode::PGH003],
+            CheckCodePrefix::PGH => vec![
+                CheckCode::PGH001,
+                CheckCode::PGH002,
+                CheckCode::PGH003,
+                CheckCode::PGH004,
+            ],
+            CheckCodePrefix::PGH0 => vec![
+                CheckCode::PGH001,
+                CheckCode::PGH002,
+                CheckCode::PGH003,
+                CheckCode::PGH004,
+            ],
+            CheckCodePrefix::PGH00 => vec![
+                CheckCode::PGH001,
+                CheckCode::PGH002,
+                CheckCode::PGH003,
+                CheckCode::PGH004,
+            ],
            CheckCodePrefix::PGH001 => vec![CheckCode::PGH001],
            CheckCodePrefix::PGH002 => vec![CheckCode::PGH002],
            CheckCodePrefix::PGH003 => vec![CheckCode::PGH003],
+            CheckCodePrefix::PGH004 => vec![CheckCode::PGH004],
            CheckCodePrefix::PLC => {
                vec![CheckCode::PLC0414, CheckCode::PLC2201, CheckCode::PLC3002]
            }
@@ -2387,9 +2424,10 @@ impl CheckCodePrefix {
            CheckCodePrefix::T20 => vec![CheckCode::T201, CheckCode::T203],
            CheckCodePrefix::T201 => vec![CheckCode::T201],
            CheckCodePrefix::T203 => vec![CheckCode::T203],
-            CheckCodePrefix::TID => vec![CheckCode::TID252],
-            CheckCodePrefix::TID2 => vec![CheckCode::TID252],
-            CheckCodePrefix::TID25 => vec![CheckCode::TID252],
+            CheckCodePrefix::TID => vec![CheckCode::TID251, CheckCode::TID252],
+            CheckCodePrefix::TID2 => vec![CheckCode::TID251, CheckCode::TID252],
+            CheckCodePrefix::TID25 => vec![CheckCode::TID251, CheckCode::TID252],
+            CheckCodePrefix::TID251 => vec![CheckCode::TID251],
            CheckCodePrefix::TID252 => vec![CheckCode::TID252],
            CheckCodePrefix::U => {
                one_time_warning!(
@@ -2421,6 +2459,7 @@ impl CheckCodePrefix {
                    CheckCode::UP021,
                    CheckCode::UP022,
                    CheckCode::UP023,
+                    CheckCode::UP025,
                ]
            }
            CheckCodePrefix::U0 => {
@@ -2453,6 +2492,7 @@ impl CheckCodePrefix {
                    CheckCode::UP021,
                    CheckCode::UP022,
                    CheckCode::UP023,
+                    CheckCode::UP025,
                ]
            }
            CheckCodePrefix::U00 => {
@@ -2669,6 +2709,7 @@ impl CheckCodePrefix {
                CheckCode::UP021,
                CheckCode::UP022,
                CheckCode::UP023,
+                CheckCode::UP025,
            ],
            CheckCodePrefix::UP0 => vec![
                CheckCode::UP001,
@@ -2693,6 +2734,7 @@ impl CheckCodePrefix {
                CheckCode::UP021,
                CheckCode::UP022,
                CheckCode::UP023,
+                CheckCode::UP025,
            ],
            CheckCodePrefix::UP00 => vec![
                CheckCode::UP001,
@@ -2739,11 +2781,13 @@ impl CheckCodePrefix {
                CheckCode::UP021,
                CheckCode::UP022,
                CheckCode::UP023,
+                CheckCode::UP025,
            ],
            CheckCodePrefix::UP020 => vec![CheckCode::UP020],
            CheckCodePrefix::UP021 => vec![CheckCode::UP021],
            CheckCodePrefix::UP022 => vec![CheckCode::UP022],
            CheckCodePrefix::UP023 => vec![CheckCode::UP023],
+            CheckCodePrefix::UP025 => vec![CheckCode::UP025],
            CheckCodePrefix::W => vec![CheckCode::W292, CheckCode::W605],
            CheckCodePrefix::W2 => vec![CheckCode::W292],
            CheckCodePrefix::W29 => vec![CheckCode::W292],
@@ -3089,6 +3133,12 @@ impl CheckCodePrefix {
            CheckCodePrefix::ICN0 => SuffixLength::One,
            CheckCodePrefix::ICN00 => SuffixLength::Two,
            CheckCodePrefix::ICN001 => SuffixLength::Three,
+            CheckCodePrefix::ISC => SuffixLength::Zero,
+            CheckCodePrefix::ISC0 => SuffixLength::One,
+            CheckCodePrefix::ISC00 => SuffixLength::Two,
+            CheckCodePrefix::ISC001 => SuffixLength::Three,
+            CheckCodePrefix::ISC002 => SuffixLength::Three,
+            CheckCodePrefix::ISC003 => SuffixLength::Three,
            CheckCodePrefix::M => SuffixLength::Zero,
            CheckCodePrefix::M0 => SuffixLength::One,
            CheckCodePrefix::M001 => SuffixLength::Three,
@@ -3152,6 +3202,7 @@ impl CheckCodePrefix {
            CheckCodePrefix::PGH001 => SuffixLength::Three,
            CheckCodePrefix::PGH002 => SuffixLength::Three,
            CheckCodePrefix::PGH003 => SuffixLength::Three,
+            CheckCodePrefix::PGH004 => SuffixLength::Three,
            CheckCodePrefix::PLC => SuffixLength::Zero,
            CheckCodePrefix::PLC0 => SuffixLength::One,
            CheckCodePrefix::PLC04 => SuffixLength::Two,
@@ -3260,6 +3311,7 @@ impl CheckCodePrefix {
            CheckCodePrefix::TID => SuffixLength::Zero,
            CheckCodePrefix::TID2 => SuffixLength::One,
            CheckCodePrefix::TID25 => SuffixLength::Two,
+            CheckCodePrefix::TID251 => SuffixLength::Three,
            CheckCodePrefix::TID252 => SuffixLength::Three,
            CheckCodePrefix::U => SuffixLength::Zero,
            CheckCodePrefix::U0 => SuffixLength::One,
@@ -3309,6 +3361,7 @@ impl CheckCodePrefix {
            CheckCodePrefix::UP021 => SuffixLength::Three,
            CheckCodePrefix::UP022 => SuffixLength::Three,
            CheckCodePrefix::UP023 => SuffixLength::Three,
+            CheckCodePrefix::UP025 => SuffixLength::Three,
            CheckCodePrefix::W => SuffixLength::Zero,
            CheckCodePrefix::W2 => SuffixLength::One,
            CheckCodePrefix::W29 => SuffixLength::Two,
@@ -3354,6 +3407,7 @@ pub const CATEGORIES: &[CheckCodePrefix] = &[
    CheckCodePrefix::FBT,
    CheckCodePrefix::I,
    CheckCodePrefix::ICN,
+    CheckCodePrefix::ISC,
    CheckCodePrefix::N,
    CheckCodePrefix::PD,
    CheckCodePrefix::PGH,
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -57,14 +57,15 @@ pub struct Cli {
    /// Disable cache reads.
    #[arg(short, long)]
    pub no_cache: bool,
-    /// List of error codes to enable.
+    /// Comma-separated list of error codes to enable (or ALL, to enable all
+    /// checks).
    #[arg(long, value_delimiter = ',')]
    pub select: Option<Vec<CheckCodePrefix>>,
    /// Like --select, but adds additional error codes on top of the selected
    /// ones.
    #[arg(long, value_delimiter = ',')]
    pub extend_select: Option<Vec<CheckCodePrefix>>,
-    /// List of error codes to ignore.
+    /// Comma-separated list of error codes to disable.
    #[arg(long, value_delimiter = ',')]
    pub ignore: Option<Vec<CheckCodePrefix>>,
    /// Like --ignore, but adds additional error codes on top of the ignored
@@ -105,17 +106,22 @@ pub struct Cli {
    no_respect_gitignore: bool,
    /// Enforce exclusions, even for paths passed to Ruff directly on the
    /// command-line.
-    #[arg(long, overrides_with("no_show_source"))]
+    #[arg(long, overrides_with("no_force_exclude"))]
    force_exclude: bool,
    #[clap(long, overrides_with("force_exclude"), hide = true)]
    no_force_exclude: bool,
+    /// Enable or disable automatic update checks.
+    #[arg(long, overrides_with("no_update_check"))]
+    update_check: bool,
+    #[clap(long, overrides_with("update_check"), hide = true)]
+    no_update_check: bool,
    /// See the files Ruff will be run against with the current settings.
    #[arg(long)]
    pub show_files: bool,
    /// See the settings Ruff will use to check a given Python file.
    #[arg(long)]
    pub show_settings: bool,
-    /// Enable automatic additions of noqa directives to failing lines.
+    /// Enable automatic additions of `noqa` directives to failing lines.
    #[arg(long)]
    pub add_noqa: bool,
    /// Regular expression matching the name of dummy variables.
@@ -128,7 +134,7 @@ pub struct Cli {
    /// formatting.
    #[arg(long)]
    pub line_length: Option<usize>,
-    /// Max McCabe complexity allowed for a function.
+    /// Maximum McCabe complexity allowed for a given function.
    #[arg(long)]
    pub max_complexity: Option<usize>,
    /// Round-trip auto-formatting.
@@ -192,11 +198,12 @@ impl Cli {
                target_version: self.target_version,
                unfixable: self.unfixable,
                // TODO(charlie): Included in `pyproject.toml`, but not inherited.
+                cache_dir: self.cache_dir,
                fix: resolve_bool_arg(self.fix, self.no_fix),
                fix_only: resolve_bool_arg(self.fix_only, self.no_fix_only),
-                format: self.format,
                force_exclude: resolve_bool_arg(self.force_exclude, self.no_force_exclude),
-                cache_dir: self.cache_dir,
+                format: self.format,
+                update_check: resolve_bool_arg(self.update_check, self.no_update_check),
            },
        )
    }
@@ -253,11 +260,12 @@ pub struct Overrides {
    pub target_version: Option<PythonVersion>,
    pub unfixable: Option<Vec<CheckCodePrefix>>,
    // TODO(charlie): Captured in pyproject.toml as a default, but not part of `Settings`.
+    pub cache_dir: Option<PathBuf>,
    pub fix: Option<bool>,
    pub fix_only: Option<bool>,
-    pub format: Option<SerializationFormat>,
    pub force_exclude: Option<bool>,
-    pub cache_dir: Option<PathBuf>,
+    pub format: Option<SerializationFormat>,
+    pub update_check: Option<bool>,
 }

 /// Map the CLI settings to a `LogLevel`.
--- a/src/flake8_annotations/plugins.rs
+++ b/src/flake8_annotations/plugins.rs
@@ -3,7 +3,7 @@ use rustpython_ast::{Constant, Expr, ExprKind, Stmt, StmtKind};

 use crate::ast::types::Range;
 use crate::ast::visitor::Visitor;
-use crate::ast::{cast, visitor};
+use crate::ast::{cast, helpers, visitor};
 use crate::checkers::ast::Checker;
 use crate::checks::{CheckCode, CheckKind};
 use crate::docstrings::definition::{Definition, DefinitionKind};
@@ -167,7 +167,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                        if checker.settings.enabled.contains(&CheckCode::ANN201) {
                            checker.add_check(Check::new(
                                CheckKind::MissingReturnTypePublicFunction(name.to_string()),
-                                Range::from_located(stmt),
+                                helpers::identifier_range(stmt, checker.locator),
                            ));
                        }
                    }
@@ -175,7 +175,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                        if checker.settings.enabled.contains(&CheckCode::ANN202) {
                            checker.add_check(Check::new(
                                CheckKind::MissingReturnTypePrivateFunction(name.to_string()),
-                                Range::from_located(stmt),
+                                helpers::identifier_range(stmt, checker.locator),
                            ));
                        }
                    }
@@ -309,14 +309,14 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                    if checker.settings.enabled.contains(&CheckCode::ANN206) {
                        checker.add_check(Check::new(
                            CheckKind::MissingReturnTypeClassMethod(name.to_string()),
-                            Range::from_located(stmt),
+                            helpers::identifier_range(stmt, checker.locator),
                        ));
                    }
                } else if visibility::is_staticmethod(checker, cast::decorator_list(stmt)) {
                    if checker.settings.enabled.contains(&CheckCode::ANN205) {
                        checker.add_check(Check::new(
                            CheckKind::MissingReturnTypeStaticMethod(name.to_string()),
-                            Range::from_located(stmt),
+                            helpers::identifier_range(stmt, checker.locator),
                        ));
                    }
                } else if visibility::is_init(stmt) {
@@ -328,7 +328,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                        {
                            let mut check = Check::new(
                                CheckKind::MissingReturnTypeSpecialMethod(name.to_string()),
-                                Range::from_located(stmt),
+                                helpers::identifier_range(stmt, checker.locator),
                            );
                            if checker.patch(check.kind.code()) {
                                match fixes::add_return_none_annotation(checker.locator, stmt) {
@@ -343,7 +343,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                    if checker.settings.enabled.contains(&CheckCode::ANN204) {
                        checker.add_check(Check::new(
                            CheckKind::MissingReturnTypeSpecialMethod(name.to_string()),
-                            Range::from_located(stmt),
+                            helpers::identifier_range(stmt, checker.locator),
                        ));
                    }
                } else {
@@ -352,7 +352,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                            if checker.settings.enabled.contains(&CheckCode::ANN201) {
                                checker.add_check(Check::new(
                                    CheckKind::MissingReturnTypePublicFunction(name.to_string()),
-                                    Range::from_located(stmt),
+                                    helpers::identifier_range(stmt, checker.locator),
                                ));
                            }
                        }
@@ -360,7 +360,7 @@ pub fn definition(checker: &mut Checker, definition: &Definition, visibility: &V
                            if checker.settings.enabled.contains(&CheckCode::ANN202) {
                                checker.add_check(Check::new(
                                    CheckKind::MissingReturnTypePrivateFunction(name.to_string()),
-                                    Range::from_located(stmt),
+                                    helpers::identifier_range(stmt, checker.locator),
                                ));
                            }
                        }
--- a/src/flake8_annotations/settings.rs
+++ b/src/flake8_annotations/settings.rs
@@ -5,7 +5,7 @@ use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};

 #[derive(
-    Debug, PartialEq, Eq, Serialize, Deserialize, Default, ConfigurationOptions, JsonSchema,
+    Debug, PartialEq, Eq, Default, Serialize, Deserialize, ConfigurationOptions, JsonSchema,
 )]
 #[serde(
    deny_unknown_fields,
@@ -51,7 +51,7 @@ pub struct Options {
    pub allow_star_arg_any: Option<bool>,
 }

-#[derive(Debug, Hash, Default)]
+#[derive(Debug, Default, Hash)]
 #[allow(clippy::struct_excessive_bools)]
 pub struct Settings {
    pub mypy_init_return: bool,
@@ -60,14 +60,24 @@ pub struct Settings {
    pub allow_star_arg_any: bool,
 }

-impl Settings {
-    #[allow(clippy::needless_pass_by_value)]
-    pub fn from_options(options: Options) -> Self {
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
        Self {
-            mypy_init_return: options.mypy_init_return.unwrap_or_default(),
-            suppress_dummy_args: options.suppress_dummy_args.unwrap_or_default(),
-            suppress_none_returning: options.suppress_none_returning.unwrap_or_default(),
-            allow_star_arg_any: options.allow_star_arg_any.unwrap_or_default(),
+            mypy_init_return: options.mypy_init_return.unwrap_or(false),
+            suppress_dummy_args: options.suppress_dummy_args.unwrap_or(false),
+            suppress_none_returning: options.suppress_none_returning.unwrap_or(false),
+            allow_star_arg_any: options.allow_star_arg_any.unwrap_or(false),
+        }
+    }
+}
+
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
+        Self {
+            mypy_init_return: Some(settings.mypy_init_return),
+            suppress_dummy_args: Some(settings.suppress_dummy_args),
+            suppress_none_returning: Some(settings.suppress_none_returning),
+            allow_star_arg_any: Some(settings.allow_star_arg_any),
        }
    }
 }
--- a/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsallow_overload.snap
+++ b/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsallow_overload.snap
@@ -6,9 +6,9 @@ expression: checks
    MissingReturnTypePublicFunction: bar
  location:
    row: 29
-    column: 4
+    column: 8
  end_location:
-    row: 30
-    column: 16
+    row: 29
+    column: 11
  fix: ~

--- a/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsdefaults.snap
+++ b/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsdefaults.snap
@@ -6,10 +6,10 @@ expression: checks
    MissingReturnTypePublicFunction: foo
  location:
    row: 4
-    column: 0
+    column: 4
  end_location:
-    row: 5
-    column: 8
+    row: 4
+    column: 7
  fix: ~
 - kind:
    MissingTypeFunctionArgument: a
@@ -33,10 +33,10 @@ expression: checks
    MissingReturnTypePublicFunction: foo
  location:
    row: 9
-    column: 0
+    column: 4
  end_location:
-    row: 10
-    column: 8
+    row: 9
+    column: 7
  fix: ~
 - kind:
    MissingTypeFunctionArgument: b
@@ -60,19 +60,19 @@ expression: checks
    MissingReturnTypePublicFunction: foo
  location:
    row: 19
-    column: 0
+    column: 4
  end_location:
-    row: 20
-    column: 8
+    row: 19
+    column: 7
  fix: ~
 - kind:
    MissingReturnTypePublicFunction: foo
  location:
    row: 24
-    column: 0
+    column: 4
  end_location:
-    row: 25
-    column: 8
+    row: 24
+    column: 7
  fix: ~
 - kind:
    DynamicallyTypedExpression: a
--- a/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsmypy_init_return.snap
+++ b/src/flake8_annotations/snapshots/ruff__flake8_annotationstestsmypy_init_return.snap
@@ -6,10 +6,10 @@ expression: checks
    MissingReturnTypeSpecialMethod: __init__
  location:
    row: 5
-    column: 4
+    column: 8
  end_location:
-    row: 6
-    column: 11
+    row: 5
+    column: 16
  fix:
    content: " -> None"
    location:
@@ -22,10 +22,10 @@ expression: checks
    MissingReturnTypeSpecialMethod: __init__
  location:
    row: 11
-    column: 4
+    column: 8
  end_location:
-    row: 12
-    column: 11
+    row: 11
+    column: 16
  fix:
    content: " -> None"
    location:
@@ -38,9 +38,9 @@ expression: checks
    MissingReturnTypePrivateFunction: __init__
  location:
    row: 40
-    column: 0
+    column: 4
  end_location:
-    row: 41
-    column: 7
+    row: 40
+    column: 12
  fix: ~

--- a/src/flake8_annotations/snapshots/ruff__flake8_annotationstestssuppress_none_returning.snap
+++ b/src/flake8_annotations/snapshots/ruff__flake8_annotationstestssuppress_none_returning.snap
@@ -6,18 +6,18 @@ expression: checks
    MissingReturnTypePublicFunction: foo
  location:
    row: 45
-    column: 0
+    column: 4
  end_location:
-    row: 46
-    column: 15
+    row: 45
+    column: 7
  fix: ~
 - kind:
    MissingReturnTypePublicFunction: foo
  location:
    row: 50
-    column: 0
+    column: 4
  end_location:
-    row: 55
-    column: 14
+    row: 50
+    column: 7
  fix: ~

--- a/src/flake8_bugbear/plugins/f_string_docstring.rs
+++ b/src/flake8_bugbear/plugins/f_string_docstring.rs
@@ -1,6 +1,6 @@
 use rustpython_ast::{ExprKind, Stmt, StmtKind};

-use crate::ast::types::Range;
+use crate::ast::helpers;
 use crate::checkers::ast::Checker;
 use crate::checks::{Check, CheckKind};

@@ -17,6 +17,6 @@ pub fn f_string_docstring(checker: &mut Checker, body: &[Stmt]) {
    };
    checker.add_check(Check::new(
        CheckKind::FStringDocstring,
-        Range::from_located(stmt),
+        helpers::identifier_range(stmt, checker.locator),
    ));
 }
--- a/src/flake8_bugbear/settings.rs
+++ b/src/flake8_bugbear/settings.rs
@@ -5,7 +5,7 @@ use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};

 #[derive(
-    Debug, PartialEq, Eq, Serialize, Deserialize, Default, ConfigurationOptions, JsonSchema,
+    Debug, PartialEq, Eq, Default, Serialize, Deserialize, ConfigurationOptions, JsonSchema,
 )]
 #[serde(
    deny_unknown_fields,
@@ -26,15 +26,23 @@ pub struct Options {
    pub extend_immutable_calls: Option<Vec<String>>,
 }

-#[derive(Debug, Hash, Default)]
+#[derive(Debug, Default, Hash)]
 pub struct Settings {
    pub extend_immutable_calls: Vec<String>,
 }

-impl Settings {
-    pub fn from_options(options: Options) -> Self {
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
        Self {
            extend_immutable_calls: options.extend_immutable_calls.unwrap_or_default(),
        }
    }
 }
+
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
+        Self {
+            extend_immutable_calls: Some(settings.extend_immutable_calls),
+        }
+    }
+}
--- a/src/flake8_errmsg/settings.rs
+++ b/src/flake8_errmsg/settings.rs
@@ -27,11 +27,18 @@ pub struct Settings {
    pub max_string_length: usize,
 }

-impl Settings {
-    #[allow(clippy::needless_pass_by_value)]
-    pub fn from_options(options: Options) -> Self {
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
        Self {
            max_string_length: options.max_string_length.unwrap_or_default(),
        }
    }
 }
+
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
+        Self {
+            max_string_length: Some(settings.max_string_length),
+        }
+    }
+}
--- a/src/flake8_implicit_str_concat/checks.rs
+++ b/src/flake8_implicit_str_concat/checks.rs
@@ -0,0 +1,73 @@
+use itertools::Itertools;
+use rustpython_ast::{Constant, Expr, ExprKind, Location, Operator};
+use rustpython_parser::lexer::{LexResult, Tok};
+
+use crate::ast::types::Range;
+use crate::checks::{Check, CheckKind};
+use crate::source_code_locator::SourceCodeLocator;
+
+/// ISC001, ISC002
+pub fn implicit(tokens: &[LexResult], locator: &SourceCodeLocator) -> Vec<Check> {
+    let mut checks = vec![];
+    for ((a_start, a_tok, a_end), (b_start, b_tok, b_end)) in
+        tokens.iter().flatten().tuple_windows()
+    {
+        if matches!(a_tok, Tok::String { .. }) && matches!(b_tok, Tok::String { .. }) {
+            if a_end.row() == b_start.row() {
+                checks.push(Check::new(
+                    CheckKind::SingleLineImplicitStringConcatenation,
+                    Range {
+                        location: *a_start,
+                        end_location: *b_end,
+                    },
+                ));
+            } else {
+                // TODO(charlie): The RustPython tokenization doesn't differentiate between
+                // continuations and newlines, so we have to detect them manually.
+                let contents = locator.slice_source_code_range(&Range {
+                    location: *a_end,
+                    end_location: Location::new(a_end.row() + 1, 0),
+                });
+                if contents.trim().ends_with('\\') {
+                    checks.push(Check::new(
+                        CheckKind::MultiLineImplicitStringConcatenation,
+                        Range {
+                            location: *a_start,
+                            end_location: *b_end,
+                        },
+                    ));
+                }
+            }
+        }
+    }
+    checks
+}
+
+/// ISC003
+pub fn explicit(expr: &Expr) -> Option<Check> {
+    if let ExprKind::BinOp { left, op, right } = &expr.node {
+        if matches!(op, Operator::Add) {
+            if matches!(
+                left.node,
+                ExprKind::JoinedStr { .. }
+                    | ExprKind::Constant {
+                        value: Constant::Str(..) | Constant::Bytes(..),
+                        ..
+                    }
+            ) && matches!(
+                right.node,
+                ExprKind::JoinedStr { .. }
+                    | ExprKind::Constant {
+                        value: Constant::Str(..) | Constant::Bytes(..),
+                        ..
+                    }
+            ) {
+                return Some(Check::new(
+                    CheckKind::ExplicitStringConcatenation,
+                    Range::from_located(expr),
+                ));
+            }
+        }
+    }
+    None
+}
--- a/src/flake8_implicit_str_concat/mod.rs
+++ b/src/flake8_implicit_str_concat/mod.rs
@@ -0,0 +1,30 @@
+pub mod checks;
+
+#[cfg(test)]
+mod tests {
+    use std::convert::AsRef;
+    use std::path::Path;
+
+    use anyhow::Result;
+    use test_case::test_case;
+
+    use crate::checks::CheckCode;
+    use crate::linter::test_path;
+    use crate::settings;
+
+    #[test_case(CheckCode::ISC001, Path::new("ISC.py"); "ISC001")]
+    #[test_case(CheckCode::ISC002, Path::new("ISC.py"); "ISC002")]
+    #[test_case(CheckCode::ISC003, Path::new("ISC.py"); "ISC003")]
+    fn checks(check_code: CheckCode, path: &Path) -> Result<()> {
+        let snapshot = format!("{}_{}", check_code.as_ref(), path.to_string_lossy());
+        let mut checks = test_path(
+            Path::new("./resources/test/fixtures/flake8_implicit_str_concat")
+                .join(path)
+                .as_path(),
+            &settings::Settings::for_rule(check_code),
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(snapshot, checks);
+        Ok(())
+    }
+}
--- a/src/flake8_implicit_str_concat/snapshots/ruff__flake8_implicit_str_concattestsISC001_ISC.py.snap
+++ b/src/flake8_implicit_str_concat/snapshots/ruff__flake8_implicit_str_concattestsISC001_ISC.py.snap
@@ -0,0 +1,21 @@
+---
+source: src/flake8_implicit_str_concat/mod.rs
+expression: checks
+---
+- kind: SingleLineImplicitStringConcatenation
+  location:
+    row: 1
+    column: 4
+  end_location:
+    row: 1
+    column: 11
+  fix: ~
+- kind: SingleLineImplicitStringConcatenation
+  location:
+    row: 1
+    column: 8
+  end_location:
+    row: 1
+    column: 15
+  fix: ~
+
--- a/src/flake8_implicit_str_concat/snapshots/ruff__flake8_implicit_str_concattestsISC002_ISC.py.snap
+++ b/src/flake8_implicit_str_concat/snapshots/ruff__flake8_implicit_str_concattestsISC002_ISC.py.snap
@@ -0,0 +1,13 @@
+---
+source: src/flake8_implicit_str_concat/mod.rs
+expression: checks
+---
+- kind: MultiLineImplicitStringConcatenation
+  location:
+    row: 5
+    column: 4
+  end_location:
+    row: 6
+    column: 9
+  fix: ~
+
--- a/src/flake8_implicit_str_concat/snapshots/ruff__flake8_implicit_str_concattestsISC003_ISC.py.snap
+++ b/src/flake8_implicit_str_concat/snapshots/ruff__flake8_implicit_str_concattestsISC003_ISC.py.snap
@@ -0,0 +1,37 @@
+---
+source: src/flake8_implicit_str_concat/mod.rs
+expression: checks
+---
+- kind: ExplicitStringConcatenation
+  location:
+    row: 3
+    column: 4
+  end_location:
+    row: 3
+    column: 17
+  fix: ~
+- kind: ExplicitStringConcatenation
+  location:
+    row: 9
+    column: 2
+  end_location:
+    row: 10
+    column: 7
+  fix: ~
+- kind: ExplicitStringConcatenation
+  location:
+    row: 14
+    column: 2
+  end_location:
+    row: 15
+    column: 7
+  fix: ~
+- kind: ExplicitStringConcatenation
+  location:
+    row: 19
+    column: 2
+  end_location:
+    row: 20
+    column: 8
+  fix: ~
+
--- a/src/flake8_import_conventions/mod.rs
+++ b/src/flake8_import_conventions/mod.rs
@@ -29,16 +29,14 @@ mod tests {
        let mut checks = test_path(
            Path::new("./resources/test/fixtures/flake8_import_conventions/custom.py"),
            &Settings {
-                flake8_import_conventions:
-                    flake8_import_conventions::settings::Settings::from_options(
-                        flake8_import_conventions::settings::Options {
-                            aliases: None,
-                            extend_aliases: Some(FxHashMap::from_iter([
-                                ("dask.array".to_string(), "da".to_string()),
-                                ("dask.dataframe".to_string(), "dd".to_string()),
-                            ])),
-                        },
-                    ),
+                flake8_import_conventions: flake8_import_conventions::settings::Options {
+                    aliases: None,
+                    extend_aliases: Some(FxHashMap::from_iter([
+                        ("dask.array".to_string(), "da".to_string()),
+                        ("dask.dataframe".to_string(), "dd".to_string()),
+                    ])),
+                }
+                .into(),
                ..Settings::for_rule(CheckCode::ICN001)
            },
        )?;
@@ -52,18 +50,16 @@ mod tests {
        let mut checks = test_path(
            Path::new("./resources/test/fixtures/flake8_import_conventions/remove_default.py"),
            &Settings {
-                flake8_import_conventions:
-                    flake8_import_conventions::settings::Settings::from_options(
-                        flake8_import_conventions::settings::Options {
-                            aliases: Some(FxHashMap::from_iter([
-                                ("altair".to_string(), "alt".to_string()),
-                                ("matplotlib.pyplot".to_string(), "plt".to_string()),
-                                ("pandas".to_string(), "pd".to_string()),
-                                ("seaborn".to_string(), "sns".to_string()),
-                            ])),
-                            extend_aliases: None,
-                        },
-                    ),
+                flake8_import_conventions: flake8_import_conventions::settings::Options {
+                    aliases: Some(FxHashMap::from_iter([
+                        ("altair".to_string(), "alt".to_string()),
+                        ("matplotlib.pyplot".to_string(), "plt".to_string()),
+                        ("pandas".to_string(), "pd".to_string()),
+                        ("seaborn".to_string(), "sns".to_string()),
+                    ])),
+                    extend_aliases: None,
+                }
+                .into(),
                ..Settings::for_rule(CheckCode::ICN001)
            },
        )?;
@@ -77,16 +73,14 @@ mod tests {
        let mut checks = test_path(
            Path::new("./resources/test/fixtures/flake8_import_conventions/override_default.py"),
            &Settings {
-                flake8_import_conventions:
-                    flake8_import_conventions::settings::Settings::from_options(
-                        flake8_import_conventions::settings::Options {
-                            aliases: None,
-                            extend_aliases: Some(FxHashMap::from_iter([(
-                                "numpy".to_string(),
-                                "nmp".to_string(),
-                            )])),
-                        },
-                    ),
+                flake8_import_conventions: flake8_import_conventions::settings::Options {
+                    aliases: None,
+                    extend_aliases: Some(FxHashMap::from_iter([(
+                        "numpy".to_string(),
+                        "nmp".to_string(),
+                    )])),
+                }
+                .into(),
                ..Settings::for_rule(CheckCode::ICN001)
            },
        )?;
--- a/src/flake8_import_conventions/settings.rs
+++ b/src/flake8_import_conventions/settings.rs
@@ -84,14 +84,6 @@ fn resolve_aliases(options: Options) -> FxHashMap<String, String> {
    aliases
 }

-impl Settings {
-    pub fn from_options(options: Options) -> Self {
-        Self {
-            aliases: resolve_aliases(options),
-        }
-    }
-}
-
 impl Default for Settings {
    fn default() -> Self {
        Self {
@@ -99,3 +91,20 @@ impl Default for Settings {
        }
    }
 }
+
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
+        Self {
+            aliases: resolve_aliases(options),
+        }
+    }
+}
+
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
+        Self {
+            aliases: Some(settings.aliases),
+            extend_aliases: None,
+        }
+    }
+}
--- a/src/flake8_quotes/settings.rs
+++ b/src/flake8_quotes/settings.rs
@@ -7,10 +7,18 @@ use serde::{Deserialize, Serialize};
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, Hash, JsonSchema)]
 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 pub enum Quote {
+    /// Use single quotes (`'`).
    Single,
+    /// Use double quotes (`"`).
    Double,
 }

+impl Default for Quote {
+    fn default() -> Self {
+        Self::Double
+    }
+}
+
 #[derive(
    Debug, PartialEq, Eq, Serialize, Deserialize, Default, ConfigurationOptions, JsonSchema,
 )]
@@ -72,24 +80,35 @@ pub struct Settings {
    pub avoid_escape: bool,
 }

-impl Settings {
-    pub fn from_options(options: Options) -> Self {
+impl Default for Settings {
+    fn default() -> Self {
        Self {
-            inline_quotes: options.inline_quotes.unwrap_or(Quote::Double),
-            multiline_quotes: options.multiline_quotes.unwrap_or(Quote::Double),
-            docstring_quotes: options.docstring_quotes.unwrap_or(Quote::Double),
+            inline_quotes: Quote::default(),
+            multiline_quotes: Quote::default(),
+            docstring_quotes: Quote::default(),
+            avoid_escape: true,
+        }
+    }
+}
+
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
+        Self {
+            inline_quotes: options.inline_quotes.unwrap_or_default(),
+            multiline_quotes: options.multiline_quotes.unwrap_or_default(),
+            docstring_quotes: options.docstring_quotes.unwrap_or_default(),
            avoid_escape: options.avoid_escape.unwrap_or(true),
        }
    }
 }

-impl Default for Settings {
-    fn default() -> Self {
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
        Self {
-            inline_quotes: Quote::Double,
-            multiline_quotes: Quote::Double,
-            docstring_quotes: Quote::Double,
-            avoid_escape: true,
+            inline_quotes: Some(settings.inline_quotes),
+            multiline_quotes: Some(settings.multiline_quotes),
+            docstring_quotes: Some(settings.docstring_quotes),
+            avoid_escape: Some(settings.avoid_escape),
        }
    }
 }
--- a/src/flake8_tidy_imports/checks.rs
+++ b/src/flake8_tidy_imports/checks.rs
@@ -1,9 +1,14 @@
-use rustpython_ast::Stmt;
+use rustc_hash::FxHashMap;
+use rustpython_ast::{Alias, Expr, Located, Stmt};

+use super::settings::BannedApi;
+use crate::ast::helpers::match_call_path;
 use crate::ast::types::Range;
+use crate::checkers::ast::Checker;
 use crate::checks::{Check, CheckKind};
 use crate::flake8_tidy_imports::settings::Strictness;

+/// TID252
 pub fn banned_relative_import(
    stmt: &Stmt,
    level: Option<&usize>,
@@ -22,3 +27,71 @@ pub fn banned_relative_import(
        None
    }
 }
+
+/// TID251
+pub fn name_is_banned(
+    module: &str,
+    name: &Alias,
+    banned_apis: &FxHashMap<String, BannedApi>,
+) -> Option<Check> {
+    let full_name = format!("{module}.{}", &name.node.name);
+    if let Some(ban) = banned_apis.get(&full_name) {
+        return Some(Check::new(
+            CheckKind::BannedApi {
+                name: full_name,
+                message: ban.msg.to_string(),
+            },
+            Range::from_located(name),
+        ));
+    }
+    None
+}
+
+/// TID251
+pub fn name_or_parent_is_banned<T>(
+    located: &Located<T>,
+    name: &str,
+    banned_apis: &FxHashMap<String, BannedApi>,
+) -> Option<Check> {
+    let mut name = name;
+    loop {
+        if let Some(ban) = banned_apis.get(name) {
+            return Some(Check::new(
+                CheckKind::BannedApi {
+                    name: name.to_string(),
+                    message: ban.msg.to_string(),
+                },
+                Range::from_located(located),
+            ));
+        }
+        match name.rfind('.') {
+            Some(idx) => {
+                name = &name[..idx];
+            }
+            None => return None,
+        }
+    }
+}
+
+/// TID251
+pub fn banned_attribute_access(
+    checker: &mut Checker,
+    call_path: &[&str],
+    expr: &Expr,
+    banned_apis: &FxHashMap<String, BannedApi>,
+) {
+    for (banned_path, ban) in banned_apis {
+        if let Some((module, member)) = banned_path.rsplit_once('.') {
+            if match_call_path(call_path, module, member, &checker.from_imports) {
+                checker.add_check(Check::new(
+                    CheckKind::BannedApi {
+                        name: banned_path.to_string(),
+                        message: ban.msg.to_string(),
+                    },
+                    Range::from_located(expr),
+                ));
+                return;
+            }
+        }
+    }
+}
--- a/src/flake8_tidy_imports/mod.rs
+++ b/src/flake8_tidy_imports/mod.rs
@@ -6,9 +6,10 @@ mod tests {
    use std::path::Path;

    use anyhow::Result;
+    use rustc_hash::FxHashMap;

    use crate::checks::CheckCode;
-    use crate::flake8_tidy_imports::settings::Strictness;
+    use crate::flake8_tidy_imports::settings::{BannedApi, Strictness};
    use crate::linter::test_path;
    use crate::{flake8_tidy_imports, Settings};

@@ -19,6 +20,7 @@ mod tests {
            &Settings {
                flake8_tidy_imports: flake8_tidy_imports::settings::Settings {
                    ban_relative_imports: Strictness::Parents,
+                    ..Default::default()
                },
                ..Settings::for_rules(vec![CheckCode::TID252])
            },
@@ -35,6 +37,7 @@ mod tests {
            &Settings {
                flake8_tidy_imports: flake8_tidy_imports::settings::Settings {
                    ban_relative_imports: Strictness::All,
+                    ..Default::default()
                },
                ..Settings::for_rules(vec![CheckCode::TID252])
            },
@@ -43,4 +46,56 @@ mod tests {
        insta::assert_yaml_snapshot!(checks);
        Ok(())
    }
+
+    #[test]
+    fn banned_api_true_positives() -> Result<()> {
+        let mut checks = test_path(
+            Path::new("./resources/test/fixtures/flake8_tidy_imports/TID251.py"),
+            &Settings {
+                flake8_tidy_imports: flake8_tidy_imports::settings::Settings {
+                    banned_api: FxHashMap::from_iter([
+                        (
+                            "cgi".to_string(),
+                            BannedApi {
+                                msg: "The cgi module is deprecated.".to_string(),
+                            },
+                        ),
+                        (
+                            "typing.TypedDict".to_string(),
+                            BannedApi {
+                                msg: "Use typing_extensions.TypedDict instead.".to_string(),
+                            },
+                        ),
+                    ]),
+                    ..Default::default()
+                },
+                ..Settings::for_rules(vec![CheckCode::TID251])
+            },
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
+
+    #[test]
+    fn banned_api_false_positives() -> Result<()> {
+        let mut checks = test_path(
+            Path::new("./resources/test/fixtures/flake8_tidy_imports/TID251_false_positives.py"),
+            &Settings {
+                flake8_tidy_imports: flake8_tidy_imports::settings::Settings {
+                    banned_api: FxHashMap::from_iter([(
+                        "typing.TypedDict".to_string(),
+                        BannedApi {
+                            msg: "Use typing_extensions.TypedDict instead.".to_string(),
+                        },
+                    )]),
+                    ..Default::default()
+                },
+                ..Settings::for_rules(vec![CheckCode::TID251])
+            },
+        )?;
+        checks.sort_by_key(|check| check.location);
+        insta::assert_yaml_snapshot!(checks);
+        Ok(())
+    }
 }
--- a/src/flake8_tidy_imports/settings.rs
+++ b/src/flake8_tidy_imports/settings.rs
@@ -1,16 +1,29 @@
 //! Settings for the `flake8-tidy-imports` plugin.

+use std::hash::{Hash, Hasher};
+
+use itertools::Itertools;
 use ruff_macros::ConfigurationOptions;
+use rustc_hash::FxHashMap;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};

 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, Hash, JsonSchema)]
 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 pub enum Strictness {
+    /// Ban imports that extend into the parent module or beyond.
    Parents,
+    /// Ban all relative imports.
    All,
 }

+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, Hash, JsonSchema)]
+#[serde(deny_unknown_fields, rename_all = "kebab-case")]
+pub struct BannedApi {
+    /// The message to display when the API is used.
+    pub msg: String,
+}
+
 #[derive(
    Debug, PartialEq, Eq, Serialize, Deserialize, Default, ConfigurationOptions, JsonSchema,
 )]
@@ -29,27 +42,62 @@ pub struct Options {
        "#
    )]
    /// Whether to ban all relative imports (`"all"`), or only those imports
-    /// that extend into the parent module and beyond (`"parents"`).
+    /// that extend into the parent module or beyond (`"parents"`).
    pub ban_relative_imports: Option<Strictness>,
+    #[option(
+        default = r#"{}"#,
+        value_type = "HashMap<String, BannedApi>",
+        example = r#"
+            [tool.ruff.flake8-tidy-imports.banned-api]
+            "cgi".msg = "The cgi module is deprecated, see https://peps.python.org/pep-0594/#cgi."
+            "typing.TypedDict".msg = "Use typing_extensions.TypedDict instead."
+        "#
+    )]
+    /// Specific modules or module members that may not be imported or accessed.
+    /// Note that this check is only meant to flag accidental uses,
+    /// and can be circumvented via `eval` or `importlib`.
+    pub banned_api: Option<FxHashMap<String, BannedApi>>,
 }

-#[derive(Debug, Hash)]
+#[derive(Debug)]
 pub struct Settings {
    pub ban_relative_imports: Strictness,
-}
-
-impl Settings {
-    pub fn from_options(options: Options) -> Self {
-        Self {
-            ban_relative_imports: options.ban_relative_imports.unwrap_or(Strictness::Parents),
-        }
-    }
+    pub banned_api: FxHashMap<String, BannedApi>,
 }

 impl Default for Settings {
    fn default() -> Self {
        Self {
            ban_relative_imports: Strictness::Parents,
+            banned_api: FxHashMap::default(),
+        }
+    }
+}
+
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
+        Self {
+            ban_relative_imports: options.ban_relative_imports.unwrap_or(Strictness::Parents),
+            banned_api: options.banned_api.unwrap_or_default(),
+        }
+    }
+}
+
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
+        Self {
+            ban_relative_imports: Some(settings.ban_relative_imports),
+            banned_api: Some(settings.banned_api),
+        }
+    }
+}
+
+impl Hash for Settings {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.ban_relative_imports.hash(state);
+        for key in self.banned_api.keys().sorted() {
+            key.hash(state);
+            self.banned_api[key].hash(state);
        }
    }
 }
--- a/src/flake8_tidy_imports/snapshots/ruff__flake8_tidy_importstestsbanned_api_false_positives.snap
+++ b/src/flake8_tidy_imports/snapshots/ruff__flake8_tidy_importstestsbanned_api_false_positives.snap
@@ -0,0 +1,38 @@
+---
+source: src/flake8_tidy_imports/mod.rs
+expression: checks
+---
+- kind:
+    BannedApi:
+      name: typing.TypedDict
+      message: Use typing_extensions.TypedDict instead.
+  location:
+    row: 2
+    column: 7
+  end_location:
+    row: 2
+    column: 23
+  fix: ~
+- kind:
+    BannedApi:
+      name: typing.TypedDict
+      message: Use typing_extensions.TypedDict instead.
+  location:
+    row: 7
+    column: 0
+  end_location:
+    row: 7
+    column: 16
+  fix: ~
+- kind:
+    BannedApi:
+      name: typing.TypedDict
+      message: Use typing_extensions.TypedDict instead.
+  location:
+    row: 11
+    column: 4
+  end_location:
+    row: 11
+    column: 20
+  fix: ~
+
--- a/src/flake8_tidy_imports/snapshots/ruff__flake8_tidy_importstestsbanned_api_true_positives.snap
+++ b/src/flake8_tidy_imports/snapshots/ruff__flake8_tidy_importstestsbanned_api_true_positives.snap
@@ -0,0 +1,137 @@
+---
+source: src/flake8_tidy_imports/mod.rs
+expression: checks
+---
+- kind:
+    BannedApi:
+      name: cgi
+      message: The cgi module is deprecated.
+  location:
+    row: 2
+    column: 7
+  end_location:
+    row: 2
+    column: 10
+  fix: ~
+- kind:
+    BannedApi:
+      name: cgi
+      message: The cgi module is deprecated.
+  location:
+    row: 4
+    column: 0
+  end_location:
+    row: 4
+    column: 17
+  fix: ~
+- kind:
+    BannedApi:
+      name: cgi
+      message: The cgi module is deprecated.
+  location:
+    row: 6
+    column: 0
+  end_location:
+    row: 6
+    column: 23
+  fix: ~
+- kind:
+    BannedApi:
+      name: cgi
+      message: The cgi module is deprecated.
+  location:
+    row: 9
+    column: 7
+  end_location:
+    row: 9
+    column: 18
+  fix: ~
+- kind:
+    BannedApi:
+      name: cgi
+      message: The cgi module is deprecated.
+  location:
+    row: 11
+    column: 0
+  end_location:
+    row: 11
+    column: 23
+  fix: ~
+- kind:
+    BannedApi:
+      name: cgi
+      message: The cgi module is deprecated.
+  location:
+    row: 13
+    column: 0
+  end_location:
+    row: 13
+    column: 25
+  fix: ~
+- kind:
+    BannedApi:
+      name: typing.TypedDict
+      message: Use typing_extensions.TypedDict instead.
+  location:
+    row: 17
+    column: 19
+  end_location:
+    row: 17
+    column: 28
+  fix: ~
+- kind:
+    BannedApi:
+      name: typing.TypedDict
+      message: Use typing_extensions.TypedDict instead.
+  location:
+    row: 22
+    column: 0
+  end_location:
+    row: 22
+    column: 16
+  fix: ~
+- kind:
+    BannedApi:
+      name: typing.TypedDict
+      message: Use typing_extensions.TypedDict instead.
+  location:
+    row: 24
+    column: 0
+  end_location:
+    row: 24
+    column: 16
+  fix: ~
+- kind:
+    BannedApi:
+      name: typing.TypedDict
+      message: Use typing_extensions.TypedDict instead.
+  location:
+    row: 27
+    column: 0
+  end_location:
+    row: 27
+    column: 16
+  fix: ~
+- kind:
+    BannedApi:
+      name: typing.TypedDict
+      message: Use typing_extensions.TypedDict instead.
+  location:
+    row: 29
+    column: 0
+  end_location:
+    row: 29
+    column: 16
+  fix: ~
+- kind:
+    BannedApi:
+      name: typing.TypedDict
+      message: Use typing_extensions.TypedDict instead.
+  location:
+    row: 33
+    column: 0
+  end_location:
+    row: 33
+    column: 28
+  fix: ~
+
--- a/src/flake8_unused_arguments/settings.rs
+++ b/src/flake8_unused_arguments/settings.rs
@@ -22,16 +22,23 @@ pub struct Options {
    pub ignore_variadic_names: Option<bool>,
 }

-#[derive(Debug, Hash, Default)]
+#[derive(Debug, Default, Hash)]
 pub struct Settings {
    pub ignore_variadic_names: bool,
 }

-impl Settings {
-    #[allow(clippy::needless_pass_by_value)]
-    pub fn from_options(options: Options) -> Self {
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
        Self {
            ignore_variadic_names: options.ignore_variadic_names.unwrap_or_default(),
        }
    }
 }
+
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
+        Self {
+            ignore_variadic_names: Some(settings.ignore_variadic_names),
+        }
+    }
+}
--- a/src/isort/settings.rs
+++ b/src/isort/settings.rs
@@ -123,8 +123,23 @@ pub struct Settings {
    pub extra_standard_library: BTreeSet<String>,
 }

-impl Settings {
-    pub fn from_options(options: Options) -> Self {
+impl Default for Settings {
+    fn default() -> Self {
+        Self {
+            combine_as_imports: false,
+            force_wrap_aliases: false,
+            split_on_trailing_comma: true,
+            force_single_line: false,
+            single_line_exclusions: BTreeSet::new(),
+            known_first_party: BTreeSet::new(),
+            known_third_party: BTreeSet::new(),
+            extra_standard_library: BTreeSet::new(),
+        }
+    }
+}
+
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
        Self {
            combine_as_imports: options.combine_as_imports.unwrap_or(false),
            force_wrap_aliases: options.force_wrap_aliases.unwrap_or(false),
@@ -142,17 +157,17 @@ impl Settings {
    }
 }

-impl Default for Settings {
-    fn default() -> Self {
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
        Self {
-            combine_as_imports: false,
-            force_wrap_aliases: false,
-            split_on_trailing_comma: true,
-            force_single_line: false,
-            single_line_exclusions: BTreeSet::new(),
-            known_first_party: BTreeSet::new(),
-            known_third_party: BTreeSet::new(),
-            extra_standard_library: BTreeSet::new(),
+            combine_as_imports: Some(settings.combine_as_imports),
+            force_wrap_aliases: Some(settings.force_wrap_aliases),
+            split_on_trailing_comma: Some(settings.split_on_trailing_comma),
+            force_single_line: Some(settings.force_single_line),
+            single_line_exclusions: Some(settings.single_line_exclusions.into_iter().collect()),
+            known_first_party: Some(settings.known_first_party.into_iter().collect()),
+            known_third_party: Some(settings.known_third_party.into_iter().collect()),
+            extra_standard_library: Some(settings.extra_standard_library.into_iter().collect()),
        }
    }
 }
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -39,6 +39,7 @@ mod flake8_comprehensions;
 mod flake8_datetimez;
 mod flake8_debugger;
 pub mod flake8_errmsg;
+mod flake8_implicit_str_concat;
 mod flake8_import_conventions;
 mod flake8_print;
 pub mod flake8_quotes;
--- a/src/lib_wasm.rs
+++ b/src/lib_wasm.rs
@@ -7,14 +7,22 @@ use wasm_bindgen::prelude::*;

 use crate::autofix::Fix;
 use crate::checks::CheckCode;
-use crate::directives;
+use crate::checks_gen::CheckCodePrefix;
 use crate::linter::check_path;
 use crate::rustpython_helpers::tokenize;
 use crate::settings::configuration::Configuration;
 use crate::settings::options::Options;
+use crate::settings::types::PythonVersion;
 use crate::settings::{flags, Settings};
 use crate::source_code_locator::SourceCodeLocator;
 use crate::source_code_style::SourceCodeStyleDetector;
+use crate::{
+    directives, flake8_annotations, flake8_bugbear, flake8_errmsg, flake8_import_conventions,
+    flake8_quotes, flake8_tidy_imports, flake8_unused_arguments, isort, mccabe, pep8_naming,
+    pydocstyle, pyupgrade,
+};
+
+const VERSION: &str = env!("CARGO_PKG_VERSION");

 #[wasm_bindgen(typescript_custom_section)]
 const TYPES: &'static str = r#"
@@ -60,6 +68,65 @@ pub fn run() {
 }

 #[wasm_bindgen]
+#[allow(non_snake_case)]
+pub fn currentVersion() -> JsValue {
+    JsValue::from(VERSION)
+}
+
+#[wasm_bindgen]
+#[allow(non_snake_case)]
+pub fn defaultSettings() -> Result<JsValue, JsValue> {
+    Ok(serde_wasm_bindgen::to_value(&Options {
+        // Propagate defaults.
+        allowed_confusables: Some(Vec::default()),
+        dummy_variable_rgx: Some("^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$".to_string()),
+        extend_ignore: Some(Vec::default()),
+        extend_select: Some(Vec::default()),
+        external: Some(Vec::default()),
+        ignore: Some(Vec::default()),
+        line_length: Some(88),
+        select: Some(vec![CheckCodePrefix::E, CheckCodePrefix::F]),
+        target_version: Some(PythonVersion::default()),
+        // Ignore a bunch of options that don't make sense in a single-file editor.
+        cache_dir: None,
+        exclude: None,
+        extend: None,
+        extend_exclude: None,
+        fix: None,
+        fix_only: None,
+        fixable: None,
+        force_exclude: None,
+        format: None,
+        ignore_init_module_imports: None,
+        per_file_ignores: None,
+        required_version: None,
+        respect_gitignore: None,
+        show_source: None,
+        src: None,
+        unfixable: None,
+        update_check: None,
+        // Use default options for all plugins.
+        flake8_annotations: Some(flake8_annotations::settings::Settings::default().into()),
+        flake8_bugbear: Some(flake8_bugbear::settings::Settings::default().into()),
+        flake8_errmsg: Some(flake8_errmsg::settings::Settings::default().into()),
+        flake8_quotes: Some(flake8_quotes::settings::Settings::default().into()),
+        flake8_tidy_imports: Some(flake8_tidy_imports::settings::Settings::default().into()),
+        flake8_import_conventions: Some(
+            flake8_import_conventions::settings::Settings::default().into(),
+        ),
+        flake8_unused_arguments: Some(
+            flake8_unused_arguments::settings::Settings::default().into(),
+        ),
+        isort: Some(isort::settings::Settings::default().into()),
+        mccabe: Some(mccabe::settings::Settings::default().into()),
+        pep8_naming: Some(pep8_naming::settings::Settings::default().into()),
+        pydocstyle: Some(pydocstyle::settings::Settings::default().into()),
+        pyupgrade: Some(pyupgrade::settings::Settings::default().into()),
+    })?)
+}
+
+#[wasm_bindgen]
+#[allow(non_snake_case)]
 pub fn check(contents: &str, options: JsValue) -> Result<JsValue, JsValue> {
    let options: Options = serde_wasm_bindgen::from_value(options).map_err(|e| e.to_string())?;
    let configuration =
--- a/src/linter.rs
+++ b/src/linter.rs
@@ -189,7 +189,14 @@ pub fn lint_path(
    settings.validate()?;

    // Check the cache.
-    let metadata = if matches!(cache, flags::Cache::Enabled) {
+    // TODO(charlie): `fixer::Mode::Apply` and `fixer::Mode::Diff` both have
+    // side-effects that aren't captured in the cache. (In practice, it's fine
+    // to cache `fixer::Mode::Apply`, since a file either has no fixes, or we'll
+    // write the fixes to disk, thus invalidating the cache. But it's a bit hard
+    // to reason about. We need to come up with a better solution here.)
+    let metadata = if matches!(cache, flags::Cache::Enabled)
+        && matches!(autofix, fixer::Mode::None | fixer::Mode::Generate)
+    {
        let metadata = path.metadata()?;
        if let Some(messages) = cache::get(path, &metadata, settings, autofix.into()) {
            debug!("Cache hit for: {}", path.to_string_lossy());
--- a/src/main_native.rs
+++ b/src/main_native.rs
@@ -117,11 +117,19 @@ pub(crate) fn inner_main() -> Result<ExitCode> {
            PyprojectDiscovery::Hierarchical(settings) => settings.respect_gitignore,
        },
    };
-    let (fix, fix_only, format) = match &pyproject_strategy {
-        PyprojectDiscovery::Fixed(settings) => (settings.fix, settings.fix_only, settings.format),
-        PyprojectDiscovery::Hierarchical(settings) => {
-            (settings.fix, settings.fix_only, settings.format)
-        }
+    let (fix, fix_only, format, update_check) = match &pyproject_strategy {
+        PyprojectDiscovery::Fixed(settings) => (
+            settings.fix,
+            settings.fix_only,
+            settings.format,
+            settings.update_check,
+        ),
+        PyprojectDiscovery::Hierarchical(settings) => (
+            settings.fix,
+            settings.fix_only,
+            settings.format,
+            settings.update_check,
+        ),
    };

    if let Some(code) = cli.explain {
@@ -270,7 +278,11 @@ pub(crate) fn inner_main() -> Result<ExitCode> {

        // Check for updates if we're in a non-silent log level.
        #[cfg(feature = "update-informer")]
-        if !is_stdin && log_level >= LogLevel::Default && atty::is(atty::Stream::Stdout) {
+        if update_check
+            && !is_stdin
+            && log_level >= LogLevel::Default
+            && atty::is(atty::Stream::Stdout)
+        {
            drop(updates::check_for_updates());
        }

--- a/src/mccabe/settings.rs
+++ b/src/mccabe/settings.rs
@@ -30,16 +30,24 @@ pub struct Settings {
    pub max_complexity: usize,
 }

-impl Settings {
-    pub fn from_options(options: &Options) -> Self {
+impl Default for Settings {
+    fn default() -> Self {
+        Self { max_complexity: 10 }
+    }
+}
+
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
        Self {
            max_complexity: options.max_complexity.unwrap_or_default(),
        }
    }
 }

-impl Default for Settings {
-    fn default() -> Self {
-        Self { max_complexity: 10 }
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
+        Self {
+            max_complexity: Some(settings.max_complexity),
+        }
    }
 }
--- a/src/noqa.rs
+++ b/src/noqa.rs
@@ -10,7 +10,7 @@ use rustc_hash::{FxHashMap, FxHashSet};

 use crate::checks::{Check, CheckCode, CODE_REDIRECTS};

-static NO_QA_LINE_REGEX: Lazy<Regex> = Lazy::new(|| {
+static NOQA_LINE_REGEX: Lazy<Regex> = Lazy::new(|| {
    Regex::new(
        r"(?P<spaces>\s*)(?P<noqa>(?i:# noqa)(?::\s?(?P<codes>([A-Z]+[0-9]+(?:[,\s]+)?)+))?)",
    )
@@ -39,7 +39,7 @@ pub enum Directive<'a> {

 /// Extract the noqa `Directive` from a line of Python source code.
 pub fn extract_noqa_directive(line: &str) -> Directive {
-    match NO_QA_LINE_REGEX.captures(line) {
+    match NOQA_LINE_REGEX.captures(line) {
        Some(caps) => match caps.name("spaces") {
            Some(spaces) => match caps.name("noqa") {
                Some(noqa) => match caps.name("codes") {
@@ -206,20 +206,20 @@ mod tests {

    use crate::ast::types::Range;
    use crate::checks::{Check, CheckKind};
-    use crate::noqa::{add_noqa_inner, NO_QA_LINE_REGEX};
+    use crate::noqa::{add_noqa_inner, NOQA_LINE_REGEX};

    #[test]
    fn regex() {
-        assert!(NO_QA_LINE_REGEX.is_match("# noqa"));
-        assert!(NO_QA_LINE_REGEX.is_match("# NoQA"));
+        assert!(NOQA_LINE_REGEX.is_match("# noqa"));
+        assert!(NOQA_LINE_REGEX.is_match("# NoQA"));

-        assert!(NO_QA_LINE_REGEX.is_match("# noqa: F401"));
-        assert!(NO_QA_LINE_REGEX.is_match("# NoQA: F401"));
-        assert!(NO_QA_LINE_REGEX.is_match("# noqa: F401, E501"));
+        assert!(NOQA_LINE_REGEX.is_match("# noqa: F401"));
+        assert!(NOQA_LINE_REGEX.is_match("# NoQA: F401"));
+        assert!(NOQA_LINE_REGEX.is_match("# noqa: F401, E501"));

-        assert!(NO_QA_LINE_REGEX.is_match("# noqa:F401"));
-        assert!(NO_QA_LINE_REGEX.is_match("# NoQA:F401"));
-        assert!(NO_QA_LINE_REGEX.is_match("# noqa:F401, E501"));
+        assert!(NOQA_LINE_REGEX.is_match("# noqa:F401"));
+        assert!(NOQA_LINE_REGEX.is_match("# NoQA:F401"));
+        assert!(NOQA_LINE_REGEX.is_match("# noqa:F401, E501"));
    }

    #[test]
--- a/src/pep8_naming/settings.rs
+++ b/src/pep8_naming/settings.rs
@@ -76,8 +76,18 @@ pub struct Settings {
    pub staticmethod_decorators: Vec<String>,
 }

-impl Settings {
-    pub fn from_options(options: Options) -> Self {
+impl Default for Settings {
+    fn default() -> Self {
+        Self {
+            ignore_names: IGNORE_NAMES.map(String::from).to_vec(),
+            classmethod_decorators: CLASSMETHOD_DECORATORS.map(String::from).to_vec(),
+            staticmethod_decorators: STATICMETHOD_DECORATORS.map(String::from).to_vec(),
+        }
+    }
+}
+
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
        Self {
            ignore_names: options
                .ignore_names
@@ -92,12 +102,12 @@ impl Settings {
    }
 }

-impl Default for Settings {
-    fn default() -> Self {
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
        Self {
-            ignore_names: IGNORE_NAMES.map(String::from).to_vec(),
-            classmethod_decorators: CLASSMETHOD_DECORATORS.map(String::from).to_vec(),
-            staticmethod_decorators: STATICMETHOD_DECORATORS.map(String::from).to_vec(),
+            ignore_names: Some(settings.ignore_names),
+            classmethod_decorators: Some(settings.classmethod_decorators),
+            staticmethod_decorators: Some(settings.staticmethod_decorators),
        }
    }
 }
--- a/src/pycodestyle/checks.rs
+++ b/src/pycodestyle/checks.rs
@@ -118,11 +118,14 @@ pub fn ambiguous_variable_name<T>(name: &str, located: &Located<T>) -> Option<Ch
 }

 /// E742
-pub fn ambiguous_class_name(name: &str, location: Range) -> Option<Check> {
+pub fn ambiguous_class_name<F>(name: &str, locate: F) -> Option<Check>
+where
+    F: FnOnce() -> Range,
+{
    if is_ambiguous_name(name) {
        Some(Check::new(
            CheckKind::AmbiguousClassName(name.to_string()),
-            location,
+            locate(),
        ))
    } else {
        None
@@ -130,11 +133,14 @@ pub fn ambiguous_class_name(name: &str, location: Range) -> Option<Check> {
 }

 /// E743
-pub fn ambiguous_function_name(name: &str, location: Range) -> Option<Check> {
+pub fn ambiguous_function_name<F>(name: &str, locate: F) -> Option<Check>
+where
+    F: FnOnce() -> Range,
+{
    if is_ambiguous_name(name) {
        Some(Check::new(
            CheckKind::AmbiguousFunctionName(name.to_string()),
-            location,
+            locate(),
        ))
    } else {
        None
--- a/src/pycodestyle/snapshots/ruffpycodestyletests__E742_E742.py.snap
+++ b/src/pycodestyle/snapshots/ruffpycodestyletests__E742_E742.py.snap
@@ -6,27 +6,27 @@ expression: checks
    AmbiguousClassName: l
  location:
    row: 1
-    column: 0
+    column: 6
  end_location:
-    row: 2
-    column: 8
+    row: 1
+    column: 7
  fix: ~
 - kind:
    AmbiguousClassName: I
  location:
    row: 5
-    column: 0
+    column: 6
  end_location:
-    row: 6
-    column: 8
+    row: 5
+    column: 7
  fix: ~
 - kind:
    AmbiguousClassName: O
  location:
    row: 9
-    column: 0
+    column: 6
  end_location:
-    row: 10
-    column: 8
+    row: 9
+    column: 7
  fix: ~

--- a/src/pycodestyle/snapshots/ruffpycodestyletests__E743_E743.py.snap
+++ b/src/pycodestyle/snapshots/ruffpycodestyletests__E743_E743.py.snap
@@ -6,27 +6,27 @@ expression: checks
    AmbiguousFunctionName: l
  location:
    row: 1
-    column: 0
+    column: 4
  end_location:
-    row: 2
-    column: 8
+    row: 1
+    column: 5
  fix: ~
 - kind:
    AmbiguousFunctionName: I
  location:
    row: 5
-    column: 0
+    column: 4
  end_location:
-    row: 6
-    column: 8
+    row: 5
+    column: 5
  fix: ~
 - kind:
    AmbiguousFunctionName: O
  location:
    row: 10
-    column: 4
+    column: 8
  end_location:
-    row: 11
-    column: 12
+    row: 10
+    column: 9
  fix: ~

--- a/src/pydocstyle/plugins.rs
+++ b/src/pydocstyle/plugins.rs
@@ -4,6 +4,7 @@ use regex::Regex;
 use rustc_hash::FxHashSet;
 use rustpython_ast::{Location, StmtKind};

+use crate::ast::helpers::identifier_range;
 use crate::ast::types::Range;
 use crate::ast::whitespace::LinesWithTrailingNewline;
 use crate::ast::{cast, whitespace};
@@ -57,7 +58,7 @@ pub fn not_missing(
            if checker.settings.enabled.contains(&CheckCode::D101) {
                checker.add_check(Check::new(
                    CheckKind::PublicClass,
-                    Range::from_located(stmt),
+                    identifier_range(stmt, checker.locator),
                ));
            }
            false
@@ -66,7 +67,7 @@ pub fn not_missing(
            if checker.settings.enabled.contains(&CheckCode::D106) {
                checker.add_check(Check::new(
                    CheckKind::PublicNestedClass,
-                    Range::from_located(stmt),
+                    identifier_range(stmt, checker.locator),
                ));
            }
            false
@@ -78,7 +79,7 @@ pub fn not_missing(
                if checker.settings.enabled.contains(&CheckCode::D103) {
                    checker.add_check(Check::new(
                        CheckKind::PublicFunction,
-                        Range::from_located(stmt),
+                        identifier_range(stmt, checker.locator),
                    ));
                }
                false
@@ -93,20 +94,23 @@ pub fn not_missing(
                if checker.settings.enabled.contains(&CheckCode::D105) {
                    checker.add_check(Check::new(
                        CheckKind::MagicMethod,
-                        Range::from_located(stmt),
+                        identifier_range(stmt, checker.locator),
                    ));
                }
                true
            } else if is_init(stmt) {
                if checker.settings.enabled.contains(&CheckCode::D107) {
-                    checker.add_check(Check::new(CheckKind::PublicInit, Range::from_located(stmt)));
+                    checker.add_check(Check::new(
+                        CheckKind::PublicInit,
+                        identifier_range(stmt, checker.locator),
+                    ));
                }
                true
            } else {
                if checker.settings.enabled.contains(&CheckCode::D102) {
                    checker.add_check(Check::new(
                        CheckKind::PublicMethod,
-                        Range::from_located(stmt),
+                        identifier_range(stmt, checker.locator),
                    ));
                }
                true
@@ -835,7 +839,7 @@ pub fn if_needed(checker: &mut Checker, docstring: &Docstring) {
    }
    checker.add_check(Check::new(
        CheckKind::SkipDocstring,
-        Range::from_located(stmt),
+        identifier_range(stmt, checker.locator),
    ));
 }

--- a/src/pydocstyle/settings.rs
+++ b/src/pydocstyle/settings.rs
@@ -4,10 +4,12 @@ use ruff_macros::ConfigurationOptions;
 use schemars::JsonSchema;
 use serde::{Deserialize, Serialize};

-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize, Hash, JsonSchema)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, Hash, JsonSchema)]
 #[serde(deny_unknown_fields, rename_all = "kebab-case")]
 pub enum Convention {
+    /// Use Google-style docstrings.
    Google,
+    /// Use NumPy-style docstrings.
    Numpy,
 }

@@ -17,7 +19,7 @@ pub enum Convention {
 #[serde(deny_unknown_fields, rename_all = "kebab-case", rename = "Pydocstyle")]
 pub struct Options {
    #[option(
-        default = r#""convention""#,
+        default = r#"None"#,
        value_type = "Convention",
        example = r#"
            # Use Google-style docstrings.
@@ -35,10 +37,18 @@ pub struct Settings {
    pub convention: Option<Convention>,
 }

-impl Settings {
-    pub fn from_options(options: Options) -> Self {
+impl From<Options> for Settings {
+    fn from(options: Options) -> Self {
        Self {
            convention: options.convention,
        }
    }
 }
+
+impl From<Settings> for Options {
+    fn from(settings: Settings) -> Self {
+        Self {
+            convention: settings.convention,
+        }
+    }
+}
--- a/src/pydocstyle/snapshots/ruffpydocstyletests__D101_D.py.snap
+++ b/src/pydocstyle/snapshots/ruffpydocstyletests__D101_D.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: PublicClass
  location:
    row: 15
-    column: 0
+    column: 6
  end_location:
-    row: 69
+    row: 15
    column: 12
  fix: ~

--- a/src/pydocstyle/snapshots/ruffpydocstyletests__D102_D.py.snap
+++ b/src/pydocstyle/snapshots/ruffpydocstyletests__D102_D.py.snap
@@ -5,25 +5,25 @@ expression: checks
 - kind: PublicMethod
  location:
    row: 23
-    column: 4
+    column: 8
  end_location:
-    row: 24
-    column: 12
+    row: 23
+    column: 14
  fix: ~
 - kind: PublicMethod
  location:
    row: 56
-    column: 4
+    column: 8
  end_location:
-    row: 57
-    column: 12
+    row: 56
+    column: 15
  fix: ~
 - kind: PublicMethod
  location:
    row: 68
-    column: 4
+    column: 8
  end_location:
-    row: 69
-    column: 12
+    row: 68
+    column: 16
  fix: ~

--- a/src/pydocstyle/snapshots/ruffpydocstyletests__D103_D.py.snap
+++ b/src/pydocstyle/snapshots/ruffpydocstyletests__D103_D.py.snap
@@ -5,9 +5,9 @@ expression: checks
 - kind: PublicFunction
  location:
    row: 400
-    column: 0
+    column: 4
  end_location:
    row: 400
-    column: 27
+    column: 17
  fix: ~

--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Charlie Marsh	818582fe8a	Bump version to 0.0.202	2022-12-30 08:16:32 -05:00
Charlie Marsh	90574c1088	Set editor background on top-level component (#1478 )	2022-12-30 07:55:54 -05:00
Charlie Marsh	3061a35e7c	Use more precise ranges for class and function checks (#1476 )	2022-12-30 07:39:20 -05:00
Martin Fischer	87681697ae	Improve CLI help for `--select` (#1471 )	2022-12-30 07:16:44 -05:00
Martin Fischer	e9ec2a7b36	Add `use test_case::test_case;` to CONTRIBUTING.md I previously tried adding the #[test_case()] attribute macro and got confused because the Rust compilation suddenly failed with: error[E0658]: use of unstable library feature 'custom_test_frameworks': custom test frameworks are an unstable feature which is a quite confusing error message. The solution is to just add `use test_case::test_case;`, so this commit adds that line to the example in CONTRIBUTING.md to spare others this source of confusion.	2022-12-30 07:13:48 -05:00
Martin Fischer	b0bb75dc1c	Add --select to command suggested in CONTRIBUTING.md By default only E* and F* lints are enabled. I previously followed the CONTRIBUTING.md instructions to implement a TID* lint and was confused why my lint wasn't being run.	2022-12-30 07:13:48 -05:00
Martin Fischer	ebca5c2df8	Make banned-api config setting optional (#1465 )	2022-12-30 07:09:56 -05:00
Charlie Marsh	16b10c42f0	Fix lint issues	2022-12-29 23:12:28 -05:00
Charlie Marsh	4a6e5d1549	Bump version to 0.0.201	2022-12-29 23:01:35 -05:00
Charlie Marsh	b078050732	Implicit flake8-implicit-str-concat (#1463 )	2022-12-29 23:00:55 -05:00
Charlie Marsh	5f796b39b4	Run cargo fmt	2022-12-29 22:25:14 -05:00
Martin Fischer	9d34da23bd	Implement TID251 (banning modules & module members) (#1436 )	2022-12-29 22:11:12 -05:00
Charlie Marsh	bde12c3bb3	Restore quick fixes for playground	2022-12-29 20:16:19 -05:00
Colin Delahunty	f735660801	Removed unicode literals (#1448 )	2022-12-29 20:11:33 -05:00
Charlie Marsh	34cd22dfc1	Copy URL but don't update the hash (#1458 )	2022-12-29 19:46:50 -05:00
Charlie Marsh	9fafe16a55	Re-add GitHub badge to the bottom of the page	2022-12-29 19:38:33 -05:00
Charlie Marsh	e9a4cb1c1d	Remove generated TypeScript options (#1456 )	2022-12-29 19:37:49 -05:00
Charlie Marsh	9db825c731	Use trailingComma: 'all' (#1457 )	2022-12-29 19:36:51 -05:00
Charlie Marsh	2c7464604a	Implement dark mode (#1455 )	2022-12-29 19:33:46 -05:00
Charlie Marsh	cd2099f772	Move default options into WASM interface (#1453 )	2022-12-29 18:06:57 -05:00
Adam Turner	091d36cd30	Add Sphinx to user list (#1451 )	2022-12-29 18:06:09 -05:00
Mathieu Kniewallner	02f156c6cb	docs(README): add missing `flake8-simplify` (#1449 )	2022-12-29 17:02:26 -05:00
Charlie Marsh	9f7350961e	Rename config to settings in the playground (#1450 )	2022-12-29 16:59:38 -05:00
Charlie Marsh	118a93260a	Bump version to 0.0.200	2022-12-29 13:31:23 -05:00
Charlie Marsh	1c16255884	Include docstrings for settings enum members (#1446 )	2022-12-29 13:15:44 -05:00
Charlie Marsh	16c4552946	Update snapshots	2022-12-29 13:13:43 -05:00
Charlie Marsh	0ba3989b3d	Make update check enablement cofnigurable (#1445 )	2022-12-29 13:06:22 -05:00
Charlie Marsh	3435e15cba	Avoid caching diffs (#1441 )	2022-12-29 12:51:58 -05:00
Maksudul Haque	781bbbc286	[pygrep-hooks] Adds Check for Blanket `# noqa` (#1440 )	2022-12-29 12:43:16 -05:00
Charlie Marsh	acf0b82f19	Re-style the Ruff playground (#1438 )	2022-12-29 11:47:27 -05:00