Bump version to 0.0.209

Fix PT006 autofix of parametrize name strings like ' first, , second ' (#1591 )
Avoid silently dropping code generator errors (#1598 )
2023-01-03 08:27:28 -05:00 · 2023-01-03 08:12:09 -05:00 · 2023-01-03 08:11:18 -05:00 · 2023-01-03 08:05:55 -05:00 · 2023-01-03 07:39:52 -05:00 · 2023-01-03 07:19:04 -05:00
889 changed files with 41287 additions and 7031 deletions
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -12,7 +12,7 @@ env:
  RUSTUP_MAX_RETRIES: 10

 jobs:
-  cargo_build:
+  cargo-build:
    name: "cargo build"
    runs-on: ubuntu-latest
    steps:
@@ -36,14 +36,13 @@ jobs:
            ${{ runner.os }}-build-
            ${{ runner.os }}-
      - run: cargo build --all --release
-      - run: ./target/release/ruff_dev generate-rules-table
-      - run: ./target/release/ruff_dev generate-options
-      - run: git diff --quiet README.md || echo "::error file=README.md::This file is outdated. You may have to rerun 'cargo dev generate-options' and/or 'cargo dev generate-rules-table'."
-      - run: ./target/release/ruff_dev generate-check-code-prefix && cargo fmt -- src/checks_gen.rs
-      - run: git diff --quiet src/checks_gen.rs || echo "::error file=src/checks_gen.rs::This file is outdated. You may have to rerun 'cargo dev generate-check-code-prefix'."
-      - run: git diff --exit-code -- README.md src/checks_gen.rs
+      - run: ./target/release/ruff_dev generate-all
+      - run: git diff --quiet README.md || echo "::error file=README.md::This file is outdated. Run 'cargo +nightly dev generate-all'."
+      - run: git diff --quiet src/registry_gen.rs || echo "::error file=src/registry_gen.rs::This file is outdated. Run 'cargo +nightly dev generate-all'."
+      - run: git diff --quiet ruff.schema.json || echo "::error file=ruff.schema.json::This file is outdated. Run 'cargo +nightly dev generate-all'."
+      - run: git diff --exit-code -- README.md src/registry_gen.rs ruff.schema.json

-  cargo_fmt:
+  cargo-fmt:
    name: "cargo fmt"
    runs-on: ubuntu-latest
    steps:
@@ -79,6 +78,7 @@ jobs:
          toolchain: nightly-2022-11-01
          override: true
          components: clippy
+          target: wasm32-unknown-unknown
      - uses: actions/cache@v3
        env:
          cache-name: cache-cargo
@@ -92,8 +92,9 @@ jobs:
            ${{ runner.os }}-build-
            ${{ runner.os }}-
      - run: cargo clippy --workspace --all-targets --all-features -- -D warnings -W clippy::pedantic
+      - run: cargo clippy --workspace --target wasm32-unknown-unknown --all-features -- -D warnings -W clippy::pedantic

-  cargo_test:
+  cargo-test:
    name: "cargo test"
    runs-on: ubuntu-latest
    steps:
@@ -115,9 +116,45 @@ jobs:
            ${{ runner.os }}-build-${{ env.cache-name }}-
            ${{ runner.os }}-build-
            ${{ runner.os }}-
-      - run: cargo test --all
+      - run: cargo install cargo-insta
+      - run: pip install black[d]==22.12.0
+      - name: Run tests
+        run: |
+          cargo insta test --all --delete-unreferenced-snapshots
+          git diff --exit-code
+      - run: cargo test --package ruff --test black_compatibility_test -- --ignored

-  maturin_build:
+# TODO(charlie): Re-enable the `wasm-pack` tests.
+# See: https://github.com/charliermarsh/ruff/issues/1425
+#  wasm-pack-test:
+#    name: "wasm-pack test"
+#    runs-on: ubuntu-latest
+#    env:
+#      WASM_BINDGEN_TEST_TIMEOUT: 60
+#    steps:
+#      - uses: actions/checkout@v3
+#      - uses: actions-rs/toolchain@v1
+#        with:
+#          profile: minimal
+#          toolchain: nightly-2022-11-01
+#          override: true
+#      - uses: actions/cache@v3
+#        env:
+#          cache-name: cache-cargo
+#        with:
+#          path: |
+#            ~/.cargo/registry
+#            ~/.cargo/git
+#          key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/Cargo.lock') }}
+#          restore-keys: |
+#            ${{ runner.os }}-build-${{ env.cache-name }}-
+#            ${{ runner.os }}-build-
+#            ${{ runner.os }}-
+#      - uses: jetli/wasm-pack-action@v0.4.0
+#      - uses: jetli/wasm-bindgen-action@v0.2.0
+#      - run: wasm-pack test --node
+
+  maturin-build:
    name: "maturin build"
    runs-on: ubuntu-latest
    steps:
@@ -129,7 +166,7 @@ jobs:
          override: true
      - uses: actions/setup-python@v4
        with:
-          python-version: "3.10"
+          python-version: "3.11"
      - run: pip install maturin
      - uses: actions/cache@v3
        env:
@@ -144,3 +181,15 @@ jobs:
            ${{ runner.os }}-build-
            ${{ runner.os }}-
      - run: maturin build -b bin
+
+  typos:
+    name: Spell Check with Typos
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout Actions Repository
+      uses: actions/checkout@v2
+
+    - name: Check spelling of file.txt
+      uses: crate-ci/typos@master
+      with:
+        files: .
--- a/.github/workflows/playground.yaml
+++ b/.github/workflows/playground.yaml
@@ -0,0 +1,50 @@
+name: "[Playground] Release"
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [main]
+
+env:
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  RUSTUP_MAX_RETRIES: 10
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    env:
+       CF_API_TOKEN_EXISTS: ${{ secrets.CF_API_TOKEN != '' }}
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly-2022-11-01
+          override: true
+          target: wasm32-unknown-unknown
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 18
+          cache: "npm"
+          cache-dependency-path: playground/package-lock.json
+      - uses: jetli/wasm-pack-action@v0.4.0
+      - uses: jetli/wasm-bindgen-action@v0.2.0
+      - name: "Run wasm-pack"
+        run: wasm-pack build --target web --out-dir playground/src/pkg
+      - name: "Install Node dependencies"
+        run: npm ci
+        working-directory: playground
+      - name: "Run TypeScript checks"
+        run: npm run check
+        working-directory: playground
+      - name: "Build JavaScript bundle"
+        run: npm run build
+        working-directory: playground
+      - name: "Deploy to Cloudflare Pages"
+        if: ${{ env.CF_API_TOKEN_EXISTS == 'true' }}
+        uses: cloudflare/wrangler-action@2.0.0
+        with:
+          apiToken: ${{ secrets.CF_API_TOKEN }}
+          accountId: ${{ secrets.CF_ACCOUNT_ID }}
+          command: pages publish playground/dist --project-name=ruff --branch ${GITHUB_HEAD_REF} --commit-hash ${GITHUB_SHA}
--- a/.gitignore
+++ b/.gitignore
@@ -181,3 +181,4 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 .idea/
+.vimspector.json
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
  - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.0.181
+    rev: v0.0.209
    hooks:
      - id: ruff

--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -9,6 +9,15 @@ free to submit a PR. For larger changes (e.g., new lint rules, new functionality
 options), consider submitting an [Issue](https://github.com/charliermarsh/ruff/issues) outlining
 your proposed change.

+If you're looking for a place to start, we recommend implementing a new lint rule (see:
+[_Adding a new lint rule_](#example-adding-a-new-lint-rule), which will allow you to learn from and
+pattern-match against the examples in the existing codebase. Many lint rules are inspired by
+existing Python plugins, which can be used as a reference implementation.
+
+As a concrete example: consider taking on one of the rules in [`flake8-simplify`](https://github.com/charliermarsh/ruff/issues/998),
+and looking to the originating [Python source](https://github.com/MartinThoma/flake8-simplify) for
+guidance.
+
 ### Prerequisites

 Ruff is written in Rust. You'll need to install the
@@ -48,8 +57,8 @@ prior to merging.
 There are four phases to adding a new lint rule:

 1. Define the rule in `src/checks.rs`.
-2. Define the _logic_ for triggering the rule in `src/check_ast.rs` (for AST-based checks),
-   `src/check_tokens.rs` (for token-based checks), or `src/check_lines.rs` (for text-based checks).
+2. Define the _logic_ for triggering the rule in `src/checkers/ast.rs` (for AST-based checks),
+   `src/checkers/tokens.rs` (for token-based checks), or `src/checkers/lines.rs` (for text-based checks).
 3. Add a test fixture.
 4. Update the generated files (documentation and generated code).

@@ -59,29 +68,23 @@ pattern implemented therein.

 To trigger the rule, you'll likely want to augment the logic in `src/check_ast.rs`, which defines
 the Python AST visitor, responsible for iterating over the abstract syntax tree and collecting
-lint-rule violations as it goes. If you need to inspect the AST, you can run `cargo dev print-ast`
-with a Python file. Grep for the `Check::new` invocations to understand how other, similar rules
-are implemented.
+lint-rule violations as it goes. If you need to inspect the AST, you can run
+`cargo +nightly dev print-ast` with a Python file. Grep for the `Check::new` invocations to
+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
-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:
+non-violations designed to evaluate and demonstrate the behavior of your lint rule.

-```rust
-#[test_case(CheckCode::A001, Path::new("A001.py"); "A001")]
-...
-```
+Run `cargo +nightly dev generate-all` to generate the code for your new fixture. Then run Ruff
+locally with (e.g.) `cargo run resources/test/fixtures/E402.py --no-cache --select E402`.

-Then, run `cargo test`. Your test will fail, but you'll be prompted to follow-up with
-`cargo insta review`. Accept the generated snapshot, then commit the snapshot file alongside the
-rest of your changes.
+Once you're satisfied with the output, codify the behavior as a snapshot test by adding a new
+`test_case` macro in the relevant `src/[test-suite-name]/mod.rs` file. Then, run `cargo test`. Your
+test will fail, but you'll be prompted to follow-up with `cargo insta review`. Accept the generated
+snapshot, then commit the snapshot file alongside the rest of your changes.

-Finally, to update the documentation, run `cargo dev generate-rules-table` from the repo root. To
-update the generated prefix map, run `cargo dev generate-check-code-prefix`. Both of these commands
-should be run whenever a new check is added to the codebase.
+Finally, regenerate the documentation and generated code with `cargo +nightly dev generate-all`.

 ### Example: Adding a new configuration option

@@ -105,7 +108,7 @@ You may also want to add the new configuration option to the `flake8-to-ruff` to
 responsible for converting `flake8` configuration files to Ruff's TOML format. This logic
 lives in `flake8_to_ruff/src/converter.rs`.

-To update the documentation for supported configuration options, run `cargo dev generate-options`.
+Finally, regenerate the documentation and generated code with `cargo +nightly dev generate-all`.

 ## Release process

--- a/Cargo.lock
+++ b/Cargo.lock
@@ -61,9 +61,9 @@ dependencies = [

 [[package]]
 name = "anyhow"
-version = "1.0.66"
+version = "1.0.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "216261ddc8289130e551ddcd5ce8a064710c0d064a4d2895c67151c92b5443f6"
+checksum = "2cb2f989d18dd141ab8ae82f64d1a8cdd37e0840f73a406896cf5e99502fab61"

 [[package]]
 name = "ascii"
@@ -86,7 +86,7 @@ version = "2.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fa3d466004a8b4cb1bc34044240a2fd29d17607e2e3bd613eb44fd48e8100da3"
 dependencies = [
- "bstr 1.0.1",
+ "bstr 1.1.0",
 "doc-comment",
 "predicates",
 "predicates-core",
@@ -160,9 +160,9 @@ dependencies = [

 [[package]]
 name = "bstr"
-version = "1.0.1"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fca0852af221f458706eb0725c03e4ed6c46af9ac98e6a689d5e634215d594dd"
+checksum = "b45ea9b00a7b3f2988e9a65ad3917e62123c38dba709b666506207be96d1790b"
 dependencies = [
 "memchr",
 "once_cell",
@@ -193,9 +193,9 @@ checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"

 [[package]]
 name = "cc"
-version = "1.0.77"
+version = "1.0.78"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e9f73505338f7d905b19d18738976aae232eb46b8efc15554ffc56deb5d9ebe4"
+checksum = "a20104e2335ce8a659d6dd92a51a767a0c062599c73b343fd152cb401e828c3d"

 [[package]]
 name = "cfg-if"
@@ -280,9 +280,9 @@ dependencies = [

 [[package]]
 name = "clap"
-version = "4.0.29"
+version = "4.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d63b9e9c07271b9957ad22c173bae2a4d9a81127680962039296abcd2f8251d"
+checksum = "a7db700bc935f9e43e88d00b0850dae18a63773cfbec6d8e070fccf7fef89a39"
 dependencies = [
 "bitflags",
 "clap_derive",
@@ -295,11 +295,11 @@ dependencies = [

 [[package]]
 name = "clap_complete"
-version = "4.0.6"
+version = "4.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7b3c9eae0de7bf8e3f904a5e40612b21fb2e2e566456d177809a48b892d24da"
+checksum = "10861370d2ba66b0f5989f83ebf35db6421713fd92351790e7fdd6c36774c56b"
 dependencies = [
- "clap 4.0.29",
+ "clap 4.0.32",
 ]

 [[package]]
@@ -308,7 +308,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4160b4a4f72ef58bd766bad27c09e6ef1cc9d82a22f6a0f55d152985a4a48e31"
 dependencies = [
- "clap 4.0.29",
+ "clap 4.0.32",
 "clap_complete",
 "clap_complete_fig",
 ]
@@ -319,7 +319,7 @@ version = "4.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "46b30e010e669cd021e5004f3be26cff6b7c08d2a8a0d65b48d43a8cc0efd6c3"
 dependencies = [
- "clap 4.0.29",
+ "clap 4.0.32",
 "clap_complete",
 ]

@@ -356,9 +356,9 @@ dependencies = [

 [[package]]
 name = "clearscreen"
-version = "1.0.10"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c969a6b6dadff9f3349b1f783f553e2411104763ca4789e1c6ca6a41f46a57b0"
+checksum = "41aa24cc5e1d6b3fc49ad4cd540b522fedcbe88bc6f259ff16e20e7010b6f8c7"
 dependencies = [
 "nix",
 "terminfo",
@@ -397,12 +397,6 @@ dependencies = [
 "winapi",
 ]

-[[package]]
-name = "common-path"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2382f75942f4b3be3690fe4f86365e9c853c1587d6ee58212cebf6e2a9ccd101"
-
 [[package]]
 name = "configparser"
 version = "3.0.2"
@@ -422,6 +416,26 @@ dependencies = [
 "winapi",
 ]

+[[package]]
+name = "console_error_panic_hook"
+version = "0.1.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a06aeb73f470f66dcdbf7223caeebb85984942f22f1adb2a088cf9668146bbbc"
+dependencies = [
+ "cfg-if 1.0.0",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "console_log"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "501a375961cef1a0d44767200e66e4a559283097e91d0730b1d75dfb2f8a1494"
+dependencies = [
+ "log",
+ "web-sys",
+]
+
 [[package]]
 name = "core-foundation-sys"
 version = "0.8.3"
@@ -524,9 +538,9 @@ checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"

 [[package]]
 name = "cxx"
-version = "1.0.83"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdf07d07d6531bfcdbe9b8b739b104610c6508dcc4d63b410585faf338241daf"
+checksum = "5add3fc1717409d029b20c5b6903fc0c0b02fa6741d820054f4a2efa5e5816fd"
 dependencies = [
 "cc",
 "cxxbridge-flags",
@@ -536,9 +550,9 @@ dependencies = [

 [[package]]
 name = "cxx-build"
-version = "1.0.83"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2eb5b96ecdc99f72657332953d4d9c50135af1bac34277801cc3937906ebd39"
+checksum = "b4c87959ba14bc6fbc61df77c3fcfe180fc32b93538c4f1031dd802ccb5f2ff0"
 dependencies = [
 "cc",
 "codespan-reporting",
@@ -551,15 +565,15 @@ dependencies = [

 [[package]]
 name = "cxxbridge-flags"
-version = "1.0.83"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac040a39517fd1674e0f32177648334b0f4074625b5588a64519804ba0553b12"
+checksum = "69a3e162fde4e594ed2b07d0f83c6c67b745e7f28ce58c6df5e6b6bef99dfb59"

 [[package]]
 name = "cxxbridge-macro"
-version = "1.0.83"
+version = "1.0.85"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1362b0ddcfc4eb0a1f57b68bd77dd99f0e826958a96abd0ae9bd092e114ffed6"
+checksum = "3e7e2adeb6a0d4a282e581096b06e1791532b7d576dcde5ccd9382acf55db8e6"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -644,6 +658,12 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fea41bba32d969b513997752735605054bc0dfa92b4c56bf1189f2e174be7a10"

+[[package]]
+name = "dyn-clone"
+version = "1.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c9b0705efd4599c15a38151f4721f7bc388306f61084d3bfd50bd07fbca5cb60"
+
 [[package]]
 name = "either"
 version = "1.8.0"
@@ -706,9 +726,9 @@ dependencies = [

 [[package]]
 name = "filetime"
-version = "0.2.18"
+version = "0.2.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b9663d381d07ae25dc88dbdf27df458faa83a9b25336bcac83d5e452b5fc9d3"
+checksum = "4e884668cd0c7480504233e951174ddc3b382f7c2666e3b7310b5c4e7b0c37f9"
 dependencies = [
 "cfg-if 1.0.0",
 "libc",
@@ -724,10 +744,10 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8-to-ruff"
-version = "0.0.181-dev.0"
+version = "0.0.209-dev.0"
 dependencies = [
 "anyhow",
- "clap 4.0.29",
+ "clap 4.0.32",
 "configparser",
 "once_cell",
 "regex",
@@ -735,6 +755,8 @@ dependencies = [
 "rustc-hash",
 "serde",
 "serde_json",
+ "strum",
+ "strum_macros",
 "toml",
 ]

@@ -944,9 +966,9 @@ dependencies = [

 [[package]]
 name = "insta"
-version = "1.22.0"
+version = "1.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "197f4e300af8b23664d4077bf5c40e0afa9ba66a567bb5a51d3def3c7b287d1c"
+checksum = "e48b08a091dfe5b09a6a9688c468fdd5b4396e92ce09e2eb932f0884b02788a4"
 dependencies = [
 "console",
 "lazy_static",
@@ -977,9 +999,9 @@ dependencies = [

 [[package]]
 name = "is-terminal"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "927609f78c2913a6f6ac3c27a4fe87f43e2a35367c0c4b0f8265e8f49a104330"
+checksum = "28dfb6c8100ccc63462345b67d1bbc3679177c75ee4bf59bf29c8b1d110b8189"
 dependencies = [
 "hermit-abi 0.2.6",
 "io-lifetimes",
@@ -998,9 +1020,9 @@ dependencies = [

 [[package]]
 name = "itoa"
-version = "1.0.4"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4217ad341ebadf8d8e724e264f13e593e0648f5b3e94b3896a5df283be015ecc"
+checksum = "fad582f4b9e86b6caa621cabeb0963332d92eea04729ab12892c2533951e6440"

 [[package]]
 name = "joinery"
@@ -1107,9 +1129,9 @@ dependencies = [

 [[package]]
 name = "libc"
-version = "0.2.138"
+version = "0.2.139"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db6d7e329c562c5dfab7a46a2afabc8b987ab9a4834c9d1ca04dc54c1546cef8"
+checksum = "201de327520df007757c1f0adce6e827fe8562fbc28bfd9c15571c66ca1f5f79"

 [[package]]
 name = "libcst"
@@ -1137,9 +1159,9 @@ dependencies = [

 [[package]]
 name = "link-cplusplus"
-version = "1.0.7"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9272ab7b96c9046fbc5bc56c06c117cb639fe2d509df0c421cad82d2915cf369"
+checksum = "ecd207c9c713c34f95a097a5b029ac2ce6010530c7b49d7fea24d977dede04f5"
 dependencies = [
 "cc",
 ]
@@ -1152,9 +1174,9 @@ checksum = "0717cef1bc8b636c6e1c1bbdefc09e6322da8a9321966e8928ef80d20f7f770f"

 [[package]]
 name = "linux-raw-sys"
-version = "0.1.3"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f9f08d8963a6c613f4b1a78f4f4a4dbfadf8e6545b2d72861731e4858b8b47f"
+checksum = "f051f77a7c8e6957c0696eac88f26b0117e54f52d3fc682ab19397a8812846a4"

 [[package]]
 name = "lock_api"
@@ -1226,6 +1248,12 @@ dependencies = [
 "windows-sys",
 ]

+[[package]]
+name = "natord"
+version = "1.0.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "308d96db8debc727c3fd9744aac51751243420e46edf401010908da7f8d5e57c"
+
 [[package]]
 name = "new_debug_unreachable"
 version = "1.0.4"
@@ -1240,13 +1268,14 @@ checksum = "d906846a98739ed9d73d66e62c2641eef8321f1734b7a1156ab045a0248fb2b3"

 [[package]]
 name = "nix"
-version = "0.24.3"
+version = "0.26.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa52e972a9a719cecb6864fb88568781eb706bac2cd1d4f04a648542dbf78069"
+checksum = "46a58d1d356c6597d08cde02c2f09d785b09e28711837b1ed667dc652c08a694"
 dependencies = [
 "bitflags",
 "cfg-if 1.0.0",
 "libc",
+ "static_assertions",
 ]

 [[package]]
@@ -1326,11 +1355,11 @@ dependencies = [

 [[package]]
 name = "num_cpus"
-version = "1.14.0"
+version = "1.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6058e64324c71e02bc2b150e4f3bc8286db6c83092132ffa3f6b1eab0f9def5"
+checksum = "0fac9e2da13b5eb447a6ce3d392f23a29d8694bff781bf03a16cd9ac8697593b"
 dependencies = [
- "hermit-abi 0.1.19",
+ "hermit-abi 0.2.6",
 "libc",
 ]

@@ -1377,9 +1406,9 @@ dependencies = [

 [[package]]
 name = "paste"
-version = "1.0.9"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1de2e551fb905ac83f73f7aedf2f0cb4a0da7e35efa24a202a936269f1f18e1"
+checksum = "d01a5bd0424d00070b0098dd17ebca6f961a959dead1dbcbbbc1d1cd8d3deeba"

 [[package]]
 name = "path-absolutize"
@@ -1617,9 +1646,9 @@ dependencies = [

 [[package]]
 name = "proc-macro2"
-version = "1.0.47"
+version = "1.0.49"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
+checksum = "57a8eca9f9c4ffde41714334dee777596264c7825420f521abc92b5b5deb63a5"
 dependencies = [
 "unicode-ident",
 ]
@@ -1649,9 +1678,9 @@ dependencies = [

 [[package]]
 name = "quote"
-version = "1.0.21"
+version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+checksum = "8856d8364d252a14d474036ea1358d63c9e6965c8e5c1885c18f73d70bff9c7b"
 dependencies = [
 "proc-macro2",
 ]
@@ -1745,11 +1774,10 @@ dependencies = [

 [[package]]
 name = "rayon"
-version = "1.6.0"
+version = "1.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e060280438193c554f654141c9ea9417886713b7acd75974c85b18a69a88e0b"
+checksum = "6db3a213adf02b3bcfd2d3846bb41cb22857d131789e01df434fb7e7bc0759b7"
 dependencies = [
- "crossbeam-deque",
 "either",
 "rayon-core",
 ]
@@ -1845,7 +1873,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.181"
+version = "0.0.209"
 dependencies = [
 "annotate-snippets 0.9.1",
 "anyhow",
@@ -1854,12 +1882,14 @@ dependencies = [
 "bincode",
 "bitflags",
 "cachedir",
+ "cfg-if 1.0.0",
 "chrono",
- "clap 4.0.29",
+ "clap 4.0.32",
 "clap_complete_command",
 "clearscreen",
 "colored",
- "common-path",
+ "console_error_panic_hook",
+ "console_log",
 "criterion",
 "dirs 4.0.0",
 "fern",
@@ -1870,11 +1900,14 @@ dependencies = [
 "ignore",
 "insta",
 "itertools",
+ "js-sys",
 "libcst",
 "log",
+ "natord",
 "nohash-hasher",
 "notify",
 "num-bigint",
+ "num-traits",
 "once_cell",
 "path-absolutize",
 "quick-junit",
@@ -1886,8 +1919,13 @@ dependencies = [
 "rustpython-ast",
 "rustpython-common",
 "rustpython-parser",
+ "schemars",
+ "semver",
 "serde",
+ "serde-wasm-bindgen",
 "serde_json",
+ "shellexpand",
+ "similar",
 "strum",
 "strum_macros",
 "test-case",
@@ -1895,15 +1933,18 @@ dependencies = [
 "titlecase",
 "toml",
 "update-informer",
+ "ureq",
 "walkdir",
+ "wasm-bindgen",
+ "wasm-bindgen-test",
 ]

 [[package]]
 name = "ruff_dev"
-version = "0.0.181"
+version = "0.0.209"
 dependencies = [
 "anyhow",
- "clap 4.0.29",
+ "clap 4.0.32",
 "codegen",
 "itertools",
 "libcst",
@@ -1912,13 +1953,16 @@ dependencies = [
 "rustpython-ast",
 "rustpython-common",
 "rustpython-parser",
+ "schemars",
+ "serde_json",
 "strum",
 "strum_macros",
+ "textwrap",
 ]

 [[package]]
 name = "ruff_macros"
-version = "0.0.181"
+version = "0.0.209"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -1934,9 +1978,9 @@ checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"

 [[package]]
 name = "rustix"
-version = "0.36.4"
+version = "0.36.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb93e85278e08bb5788653183213d3a60fc242b10cb9be96586f5a73dcb67c23"
+checksum = "a3807b5d10909833d3e9acd1eb5fb988f79376ff10fce42937de71a449c4c588"
 dependencies = [
 "bitflags",
 "errno",
@@ -1961,7 +2005,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=8d879a53197f9c73062f6160410bdba796a71cbf#8d879a53197f9c73062f6160410bdba796a71cbf"
+source = "git+https://github.com/RustPython/RustPython.git?rev=4d53c7cb27c0379adf8b51c4d3d0d2174f41d590#4d53c7cb27c0379adf8b51c4d3d0d2174f41d590"
 dependencies = [
 "num-bigint",
 "rustpython-common",
@@ -1971,11 +2015,13 @@ dependencies = [
 [[package]]
 name = "rustpython-common"
 version = "0.0.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=8d879a53197f9c73062f6160410bdba796a71cbf#8d879a53197f9c73062f6160410bdba796a71cbf"
+source = "git+https://github.com/RustPython/RustPython.git?rev=4d53c7cb27c0379adf8b51c4d3d0d2174f41d590#4d53c7cb27c0379adf8b51c4d3d0d2174f41d590"
 dependencies = [
 "ascii",
+ "bitflags",
 "cfg-if 1.0.0",
 "hexf-parse",
+ "itertools",
 "lexical-parse-float",
 "libc",
 "lock_api",
@@ -1994,7 +2040,7 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=8d879a53197f9c73062f6160410bdba796a71cbf#8d879a53197f9c73062f6160410bdba796a71cbf"
+source = "git+https://github.com/RustPython/RustPython.git?rev=4d53c7cb27c0379adf8b51c4d3d0d2174f41d590#4d53c7cb27c0379adf8b51c4d3d0d2174f41d590"
 dependencies = [
 "bincode",
 "bitflags",
@@ -2011,7 +2057,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=8d879a53197f9c73062f6160410bdba796a71cbf#8d879a53197f9c73062f6160410bdba796a71cbf"
+source = "git+https://github.com/RustPython/RustPython.git?rev=4d53c7cb27c0379adf8b51c4d3d0d2174f41d590#4d53c7cb27c0379adf8b51c4d3d0d2174f41d590"
 dependencies = [
 "ahash",
 "anyhow",
@@ -2035,15 +2081,15 @@ dependencies = [

 [[package]]
 name = "rustversion"
-version = "1.0.9"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97477e48b4cf8603ad5f7aaf897467cf42ab4218a38ef76fb14c2d6773a6d6a8"
+checksum = "5583e89e108996506031660fe09baa5011b9dd0341b89029313006d1fb508d70"

 [[package]]
 name = "ryu"
-version = "1.0.11"
+version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
+checksum = "7b4b9743ed687d4b4bcedf9ff5eaa7398495ae14e61cba0a295704edbc7decde"

 [[package]]
 name = "same-file"
@@ -2054,6 +2100,36 @@ dependencies = [
 "winapi-util",
 ]

+[[package]]
+name = "schemars"
+version = "0.8.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a5fb6c61f29e723026dc8e923d94c694313212abbecbbe5f55a7748eec5b307"
+dependencies = [
+ "dyn-clone",
+ "schemars_derive",
+ "serde",
+ "serde_json",
+]
+
+[[package]]
+name = "schemars_derive"
+version = "0.8.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f188d036977451159430f3b8dc82ec76364a42b7e289c2b18a9a18f4470058e9"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "serde_derive_internals",
+ "syn",
+]
+
+[[package]]
+name = "scoped-tls"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1cf6437eb19a8f4a6cc0f7dca544973b0b78843adbfeb3683d1a94a0024a294"
+
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -2062,9 +2138,9 @@ checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"

 [[package]]
 name = "scratch"
-version = "1.0.2"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c8132065adcfd6e02db789d9285a0deb2f3fcb04002865ab67d5fb103533898"
+checksum = "ddccb15bcce173023b3fedd9436f882a0739b8dfb45e4f6b6002bee5929f61b2"

 [[package]]
 name = "sct"
@@ -2078,24 +2154,46 @@ dependencies = [

 [[package]]
 name = "semver"
-version = "1.0.14"
+version = "1.0.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e25dfac463d778e353db5be2449d1cce89bd6fd23c9f1ea21310ce6e5a1b29c4"
+checksum = "58bc9567378fc7690d6b2addae4e60ac2eeea07becb2c64b9f218b53865cba2a"

 [[package]]
 name = "serde"
-version = "1.0.148"
+version = "1.0.151"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e53f64bb4ba0191d6d0676e1b141ca55047d83b74f5607e6d8eb88126c52c2dc"
+checksum = "97fed41fc1a24994d044e6db6935e69511a1153b52c15eb42493b26fa87feba0"
 dependencies = [
 "serde_derive",
 ]

 [[package]]
-name = "serde_derive"
-version = "1.0.148"
+name = "serde-wasm-bindgen"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a55492425aa53521babf6137309e7d34c20bbfbbfcfe2c7f3a047fd1f6b92c0c"
+checksum = "e3b4c031cd0d9014307d82b8abf653c0290fbdaeb4c02d00c63cf52f728628bf"
+dependencies = [
+ "js-sys",
+ "serde",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "serde_derive"
+version = "1.0.151"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "255abe9a125a985c05190d687b320c12f9b1f0b99445e608c21ba0782c719ad8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "serde_derive_internals"
+version = "0.26.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85bf8229e7920a9f636479437026331ce11aa132b4dde37d121944a44d6e5f3c"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2104,15 +2202,24 @@ dependencies = [

 [[package]]
 name = "serde_json"
-version = "1.0.89"
+version = "1.0.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "020ff22c755c2ed3f8cf162dbb41a7268d934702f3ed3631656ea597e08fc3db"
+checksum = "877c235533714907a8c2464236f5c4b2a17262ef1bd71f38f35ea592c8da6883"
 dependencies = [
 "itoa",
 "ryu",
 "serde",
 ]

+[[package]]
+name = "shellexpand"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd1c7ddea665294d484c39fd0c0d2b7e35bbfe10035c5fe1854741a57f6880e1"
+dependencies = [
+ "dirs 4.0.0",
+]
+
 [[package]]
 name = "similar"
 version = "2.2.1"
@@ -2151,9 +2258,9 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"

 [[package]]
 name = "str_indices"
-version = "0.4.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d9199fa80c817e074620be84374a520062ebac833f358d74b37060ce4a0f2c0"
+checksum = "5f026164926842ec52deb1938fae44f83dfdb82d0a5b0270c5bd5935ab74d6dd"

 [[package]]
 name = "string_cache"
@@ -2198,9 +2305,9 @@ dependencies = [

 [[package]]
 name = "syn"
-version = "1.0.105"
+version = "1.0.107"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60b9b43d45702de4c839cb9b51d9f529c5dd26a4aff255b42b1ebc03e88ee908"
+checksum = "1f4064b5b16e03ae50984a5a8ed5d4f8803e6bc1fd170a3cda91a1be4b18e3f5"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2305,18 +2412,18 @@ dependencies = [

 [[package]]
 name = "thiserror"
-version = "1.0.37"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10deb33631e3c9018b9baf9dcbbc4f737320d2b576bac10f6aefa048fa407e3e"
+checksum = "6a9cd18aa97d5c45c6603caea1da6628790b37f7a34b6ca89522331c5180fed0"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "1.0.37"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "982d17546b47146b28f7c22e3d08465f6b8903d0ea13c1660d9d84a6e7adcdbb"
+checksum = "1fb327af4685e4d03fa8cbcf1716380da910eeb2bb8be417e7f9fd3fb164f36f"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -2390,9 +2497,9 @@ dependencies = [

 [[package]]
 name = "toml"
-version = "0.5.9"
+version = "0.5.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8d82e1a7758622a465f8cee077614c73484dac5b836c02ff6a40d5d1010324d7"
+checksum = "1333c76748e868a4d9d1017b5ab53171dfd095f70c712fdb4653a406547f598f"
 dependencies = [
 "serde",
 ]
@@ -2479,9 +2586,9 @@ checksum = "099b7128301d285f79ddd55b9a83d5e6b9e97c92e0ea0daebee7263e932de992"

 [[package]]
 name = "unicode-ident"
-version = "1.0.5"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ceab39d59e4c9499d4e5a8ee0e2735b891bb7308ac83dfb4e80cad195c9f6f3"
+checksum = "84a22b9f218b40614adcb3f4ff08b703773ad44fa9423e4e0d346d5db86e4ebc"

 [[package]]
 name = "unicode-linebreak"
@@ -2528,9 +2635,9 @@ checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"

 [[package]]
 name = "update-informer"
-version = "0.5.0"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f154aee470c0882ea0f3b1cc2a46c5f4d24f282655f7b0cec065614fe24c447f"
+checksum = "152ff185ca29f7f487c51ca785b0f1d85970c4581f4cdd12ed499227890200f5"
 dependencies = [
 "directories",
 "semver",
@@ -2650,6 +2757,18 @@ dependencies = [
 "wasm-bindgen-shared",
 ]

+[[package]]
+name = "wasm-bindgen-futures"
+version = "0.4.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23639446165ca5a5de86ae1d8896b737ae80319560fbaa4c2887b7da6e7ebd7d"
+dependencies = [
+ "cfg-if 1.0.0",
+ "js-sys",
+ "wasm-bindgen",
+ "web-sys",
+]
+
 [[package]]
 name = "wasm-bindgen-macro"
 version = "0.2.83"
@@ -2679,6 +2798,30 @@ version = "0.2.83"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1c38c045535d93ec4f0b4defec448e4291638ee608530863b1e2ba115d4fff7f"

+[[package]]
+name = "wasm-bindgen-test"
+version = "0.3.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09d2fff962180c3fadf677438054b1db62bee4aa32af26a45388af07d1287e1d"
+dependencies = [
+ "console_error_panic_hook",
+ "js-sys",
+ "scoped-tls",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "wasm-bindgen-test-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-test-macro"
+version = "0.3.33"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4683da3dfc016f704c9f82cf401520c4f1cb3ee440f7f52b3d6ac29506a49ca7"
+dependencies = [
+ "proc-macro2",
+ "quote",
+]
+
 [[package]]
 name = "web-sys"
 version = "0.3.60"
@@ -2701,9 +2844,9 @@ dependencies = [

 [[package]]
 name = "webpki-roots"
-version = "0.22.5"
+version = "0.22.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "368bfe657969fb01238bb756d351dcade285e0f6fcbd36dcb23359a5169975be"
+checksum = "b6c71e40d7d2c34a5106301fb632274ca37242cd0c9d3e64dbece371a40a2d87"
 dependencies = [
 "webpki",
 ]
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,12 +6,19 @@ members = [

 [package]
 name = "ruff"
-version = "0.0.181"
+version = "0.0.209"
+authors = ["Charlie Marsh <charlie.r.marsh@gmail.com>"]
 edition = "2021"
 rust-version = "1.65.0"
+documentation = "https://github.com/charliermarsh/ruff"
+homepage = "https://github.com/charliermarsh/ruff"
+repository = "https://github.com/charliermarsh/ruff"
+readme = "README.md"
+license = "MIT"

 [lib]
 name = "ruff"
+crate-type = ["cdylib", "rlib"]

 [dependencies]
 annotate-snippets = { version = "0.9.1", features = ["color"] }
@@ -20,11 +27,11 @@ atty = { version = "0.2.14" }
 bincode = { version = "1.3.3" }
 bitflags = { version = "1.3.2" }
 cachedir = { version = "0.3.0" }
+cfg-if = { version = "1.0.0" }
 chrono = { version = "0.4.21", default-features = false, features = ["clock"] }
 clap = { version = "4.0.1", features = ["derive"] }
-clap_complete_command = "0.4.0"
+clap_complete_command = { version = "0.4.0" }
 colored = { version = "2.0.0" }
-common-path = { version = "1.0.0" }
 dirs = { version = "4.0.0" }
 fern = { version = "0.6.1" }
 filetime = { version = "0.2.17" }
@@ -34,43 +41,58 @@ ignore = { version = "0.4.18" }
 itertools = { version = "0.10.5" }
 libcst = { git = "https://github.com/charliermarsh/LibCST", rev = "f2f0b7a487a8725d161fe8b3ed73a6758b21e177" }
 log = { version = "0.4.17" }
+natord = { version = "1.0.9" }
 nohash-hasher = { version = "0.2.0" }
 notify = { version = "5.0.0" }
 num-bigint = { version = "0.4.3" }
+num-traits = "0.2.15"
 once_cell = { version = "1.16.0" }
 path-absolutize = { version = "3.0.14", features = ["once_cell_cache", "use_unix_paths_on_wasm"] }
 quick-junit = { version = "0.3.2" }
-rayon = { version = "1.5.3" }
 regex = { version = "1.6.0" }
 ropey = { version = "1.5.0", features = ["cr_lines", "simd"], default-features = false }
-ruff_macros = { version = "0.0.181", path = "ruff_macros" }
+ruff_macros = { version = "0.0.209", path = "ruff_macros" }
 rustc-hash = { version = "1.1.0" }
-rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "8d879a53197f9c73062f6160410bdba796a71cbf" }
-rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "8d879a53197f9c73062f6160410bdba796a71cbf" }
-rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "8d879a53197f9c73062f6160410bdba796a71cbf" }
+rustpython-ast = { features = ["unparse"], git = "https://github.com/RustPython/RustPython.git", rev = "4d53c7cb27c0379adf8b51c4d3d0d2174f41d590" }
+rustpython-common = { git = "https://github.com/RustPython/RustPython.git", rev = "4d53c7cb27c0379adf8b51c4d3d0d2174f41d590" }
+rustpython-parser = { features = ["lalrpop"], git = "https://github.com/RustPython/RustPython.git", rev = "4d53c7cb27c0379adf8b51c4d3d0d2174f41d590" }
+schemars = { version = "0.8.11" }
+semver = { version = "1.0.16" }
 serde = { version = "1.0.147", features = ["derive"] }
 serde_json = { version = "1.0.87" }
+shellexpand = { version = "3.0.0" }
+similar = { version = "2.2.1" }
 strum = { version = "0.24.1", features = ["strum_macros"] }
 strum_macros = { version = "0.24.3" }
 textwrap = { version = "0.16.0" }
 titlecase = { version = "2.2.1" }
 toml = { version = "0.5.9" }
-update-informer = { version = "0.5.0", default-features = false, features = ["pypi"], optional = true }
 walkdir = { version = "2.3.2" }

 [target.'cfg(not(target_family = "wasm"))'.dependencies]
-clearscreen = { version = "1.0.10" } # uses which
+clearscreen = { version = "2.0.0" }
+rayon = { version = "1.5.3" }
+update-informer = { version = "0.6.0", default-features = false, features = ["pypi"], optional = true }

 # https://docs.rs/getrandom/0.2.7/getrandom/#webassembly-support
 # For (future) wasm-pack support
 [target.'cfg(all(target_family = "wasm", target_os = "unknown"))'.dependencies]
 getrandom = { version = "0.2.7", features = ["js"] }
+console_error_panic_hook = { version = "0.1.7" }
+console_log = { version = "0.2.0" }
+serde-wasm-bindgen = { version = "0.4" }
+js-sys = { version = "0.3.60" }
+wasm-bindgen = { version = "0.2.83" }

 [dev-dependencies]
-assert_cmd = { version = "2.0.4" }
-criterion = { version = "0.4.0" }
 insta = { version = "1.19.1", features = ["yaml"] }
 test-case = { version = "2.2.2" }
+ureq = { version = "2.5.0", features = [] }
+wasm-bindgen-test = { version = "0.3.33" }
+
+[target.'cfg(not(target_family = "wasm"))'.dev-dependencies]
+assert_cmd = { version = "2.0.4" }
+criterion = { version = "0.4.0" }

 [features]
 default = ["update-informer"]
@@ -88,6 +110,11 @@ opt-level = 3
 [profile.dev.package.similar]
 opt-level = 3

+# Reduce complexity of a parser function that would trigger a locals limit in a wasm tool.
+# https://github.com/bytecodealliance/wasm-tools/blob/b5c3d98e40590512a3b12470ef358d5c7b983b15/crates/wasmparser/src/limits.rs#L29
+[profile.dev.package.rustpython-parser]
+opt-level = 1
+
 [[bench]]
 name = "source_code_locator"
 harness = false
--- 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
--- a/flake8_to_ruff/Cargo.lock
+++ b/flake8_to_ruff/Cargo.lock
@@ -771,7 +771,7 @@ checksum = "0ce7134b9999ecaf8bcd65542e436736ef32ddca1b3e06094cb6ec5755203b80"

 [[package]]
 name = "flake8_to_ruff"
-version = "0.0.181"
+version = "0.0.209"
 dependencies = [
 "anyhow",
 "clap",
@@ -1975,7 +1975,7 @@ dependencies = [

 [[package]]
 name = "ruff"
-version = "0.0.181"
+version = "0.0.209"
 dependencies = [
 "anyhow",
 "bincode",
@@ -2028,7 +2028,7 @@ dependencies = [
 [[package]]
 name = "rustpython-ast"
 version = "0.1.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=8d879a53197f9c73062f6160410bdba796a71cbf#8d879a53197f9c73062f6160410bdba796a71cbf"
+source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
 dependencies = [
 "num-bigint",
 "rustpython-common",
@@ -2038,7 +2038,7 @@ dependencies = [
 [[package]]
 name = "rustpython-common"
 version = "0.0.0"
-source = "git+https://github.com/RustPython/RustPython.git?rev=8d879a53197f9c73062f6160410bdba796a71cbf#8d879a53197f9c73062f6160410bdba796a71cbf"
+source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
 dependencies = [
 "ascii",
 "cfg-if 1.0.0",
@@ -2061,7 +2061,7 @@ dependencies = [
 [[package]]
 name = "rustpython-compiler-core"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=8d879a53197f9c73062f6160410bdba796a71cbf#8d879a53197f9c73062f6160410bdba796a71cbf"
+source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
 dependencies = [
 "bincode",
 "bitflags",
@@ -2078,7 +2078,7 @@ dependencies = [
 [[package]]
 name = "rustpython-parser"
 version = "0.1.2"
-source = "git+https://github.com/RustPython/RustPython.git?rev=8d879a53197f9c73062f6160410bdba796a71cbf#8d879a53197f9c73062f6160410bdba796a71cbf"
+source = "git+https://github.com/RustPython/RustPython.git?rev=1b6cb170e925a43d605b3fed9f6b878e63e47744#1b6cb170e925a43d605b3fed9f6b878e63e47744"
 dependencies = [
 "ahash",
 "anyhow",
--- a/flake8_to_ruff/Cargo.toml
+++ b/flake8_to_ruff/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "flake8-to-ruff"
-version = "0.0.181-dev.0"
+version = "0.0.209-dev.0"
 edition = "2021"

 [lib]
@@ -16,6 +16,8 @@ ruff = { path = "..", default-features = false }
 rustc-hash = { version = "1.1.0" }
 serde = { version = "1.0.147", features = ["derive"] }
 serde_json = { version = "1.0.87" }
+strum = { version = "0.24.1", features = ["strum_macros"] }
+strum_macros = { version = "0.24.3" }
 toml = { version = "0.5.9" }

 [dev-dependencies]
--- a/flake8_to_ruff/examples/cryptography/pyproject.toml
+++ b/flake8_to_ruff/examples/cryptography/pyproject.toml
@@ -0,0 +1,65 @@
+[build-system]
+requires = [
+    # The minimum setuptools version is specific to the PEP 517 backend,
+    # and may be stricter than the version required in `setup.cfg`
+    "setuptools>=40.6.0,!=60.9.0",
+    "wheel",
+    # Must be kept in sync with the `install_requirements` in `setup.cfg`
+    "cffi>=1.12; platform_python_implementation != 'PyPy'",
+    "setuptools-rust>=0.11.4",
+]
+build-backend = "setuptools.build_meta"
+
+[tool.black]
+line-length = 79
+target-version = ["py36"]
+
+[tool.pytest.ini_options]
+addopts = "-r s --capture=no --strict-markers --benchmark-disable"
+markers = [
+    "skip_fips: this test is not executed in FIPS mode",
+    "supported: parametrized test requiring only_if and skip_message",
+]
+
+[tool.mypy]
+show_error_codes = true
+check_untyped_defs = true
+no_implicit_reexport = true
+warn_redundant_casts = true
+warn_unused_ignores = true
+warn_unused_configs = true
+strict_equality = true
+
+[[tool.mypy.overrides]]
+module = [
+    "pretend"
+]
+ignore_missing_imports = true
+
+[tool.coverage.run]
+branch = true
+relative_files = true
+source = [
+    "cryptography",
+    "tests/",
+]
+
+[tool.coverage.paths]
+source = [
+   "src/cryptography",
+   "*.tox/*/lib*/python*/site-packages/cryptography",
+   "*.tox\\*\\Lib\\site-packages\\cryptography",
+   "*.tox/pypy/site-packages/cryptography",
+]
+tests =[
+   "tests/",
+   "*tests\\",
+]
+
+[tool.coverage.report]
+exclude_lines = [
+    "@abc.abstractmethod",
+    "@abc.abstractproperty",
+    "@typing.overload",
+    "if typing.TYPE_CHECKING",
+]
--- a/flake8_to_ruff/examples/cryptography/setup.cfg
+++ b/flake8_to_ruff/examples/cryptography/setup.cfg
@@ -0,0 +1,91 @@
+[metadata]
+name = cryptography
+version = attr: cryptography.__version__
+description = cryptography is a package which provides cryptographic recipes and primitives to Python developers.
+long_description = file: README.rst
+long_description_content_type = text/x-rst
+license = BSD-3-Clause OR Apache-2.0
+url = https://github.com/pyca/cryptography
+author = The Python Cryptographic Authority and individual contributors
+author_email = cryptography-dev@python.org
+project_urls =
+    Documentation=https://cryptography.io/
+    Source=https://github.com/pyca/cryptography/
+    Issues=https://github.com/pyca/cryptography/issues
+    Changelog=https://cryptography.io/en/latest/changelog/
+classifiers =
+    Development Status :: 5 - Production/Stable
+    Intended Audience :: Developers
+    License :: OSI Approved :: Apache Software License
+    License :: OSI Approved :: BSD License
+    Natural Language :: English
+    Operating System :: MacOS :: MacOS X
+    Operating System :: POSIX
+    Operating System :: POSIX :: BSD
+    Operating System :: POSIX :: Linux
+    Operating System :: Microsoft :: Windows
+    Programming Language :: Python
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: Implementation :: PyPy
+    Topic :: Security :: Cryptography
+
+[options]
+python_requires = >=3.6
+include_package_data = True
+zip_safe = False
+package_dir =
+    =src
+packages = find:
+# `install_requires` must be kept in sync with `pyproject.toml`
+install_requires =
+    cffi >=1.12
+
+[options.packages.find]
+where = src
+exclude =
+    _cffi_src
+    _cffi_src.*
+
+[options.extras_require]
+test =
+    pytest>=6.2.0
+    pytest-benchmark
+    pytest-cov
+    pytest-subtests
+    pytest-xdist
+    pretend
+    iso8601
+    pytz
+    hypothesis>=1.11.4,!=3.79.2
+docs =
+    sphinx >= 1.6.5,!=1.8.0,!=3.1.0,!=3.1.1,!=5.2.0,!=5.2.0.post0
+    sphinx_rtd_theme
+docstest =
+    pyenchant >= 1.6.11
+    twine >= 1.12.0
+    sphinxcontrib-spelling >= 4.0.1
+sdist =
+    setuptools_rust >= 0.11.4
+pep8test =
+    black
+    flake8
+    flake8-import-order
+    pep8-naming
+# This extra is for OpenSSH private keys that use bcrypt KDF
+# Versions: v3.1.3 - ignore_few_rounds, v3.1.5 - abi3
+ssh =
+    bcrypt >= 3.1.5
+
+[flake8]
+ignore = E203,E211,W503,W504,N818
+exclude = .tox,*.egg,.git,_build,.hypothesis
+select = E,W,F,N,I
+application-import-names = cryptography,cryptography_vectors,tests
--- a/flake8_to_ruff/examples/manim.ini
+++ b/flake8_to_ruff/examples/manim.ini
@@ -0,0 +1,43 @@
+[flake8]
+# Exclude the grpc generated code
+exclude = ./manim/grpc/gen/*
+max-complexity = 15
+max-line-length = 88
+statistics = True
+# Prevents some flake8-rst-docstrings errors
+rst-roles = attr,class,func,meth,mod,obj,ref,doc,exc
+rst-directives = manim, SEEALSO, seealso
+docstring-convention=numpy
+
+select = A,A00,B,B9,C4,C90,D,E,F,F,PT,RST,SIM,W
+
+                # General Compatibility
+extend-ignore = E203, W503, D202, D212, D213, D404
+
+                # Misc
+                F401, F403, F405, F841, E501, E731, E402, F811, F821,
+
+                # Plug-in: flake8-builtins
+                A001, A002, A003,
+
+                # Plug-in: flake8-bugbear
+                B006, B007, B008, B009, B010, B903, B950,
+
+                # Plug-in: flake8-simplify
+                SIM105, SIM106, SIM119,
+
+                # Plug-in: flake8-comprehensions
+                C901
+
+                # Plug-in: flake8-pytest-style
+                PT001, PT004, PT006, PT011, PT018, PT022, PT023,
+
+                # Plug-in: flake8-docstrings
+                D100, D101, D102, D103, D104, D105, D106, D107,
+                D200, D202, D204, D205, D209,
+                D301,
+                D400, D401, D402, D403, D405, D406, D407, D409, D411, D412, D414,
+
+                # Plug-in: flake8-rst-docstrings
+                RST201, RST203, RST210, RST212, RST213, RST215,
+                RST301, RST303,
--- a/flake8_to_ruff/pyproject.toml
+++ b/flake8_to_ruff/pyproject.toml
@@ -12,6 +12,7 @@ classifiers = [
    "Programming Language :: Python :: 3.8",
    "Programming Language :: Python :: 3.9",
    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
    "Programming Language :: Python :: 3 :: Only",
    "Topic :: Software Development :: Libraries :: Python Modules",
    "Topic :: Software Development :: Quality Assurance",
--- a/flake8_to_ruff/src/black.rs
+++ b/flake8_to_ruff/src/black.rs
@@ -0,0 +1,32 @@
+//! Extract Black configuration settings from a pyproject.toml.
+
+use std::path::Path;
+
+use anyhow::Result;
+use ruff::settings::types::PythonVersion;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize, Default)]
+pub struct Black {
+    #[serde(alias = "line-length", alias = "line_length")]
+    pub line_length: Option<usize>,
+    #[serde(alias = "target-version", alias = "target_version")]
+    pub target_version: Option<Vec<PythonVersion>>,
+}
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+struct Tools {
+    black: Option<Black>,
+}
+
+#[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+struct Pyproject {
+    tool: Option<Tools>,
+}
+
+pub fn parse_black_options<P: AsRef<Path>>(path: P) -> Result<Option<Black>> {
+    let contents = std::fs::read_to_string(path)?;
+    Ok(toml::from_str::<Pyproject>(&contents)?
+        .tool
+        .and_then(|tool| tool.black))
+}
--- a/flake8_to_ruff/src/converter.rs
+++ b/flake8_to_ruff/src/converter.rs
@@ -1,22 +1,34 @@
 use std::collections::{BTreeSet, HashMap};

 use anyhow::Result;
-use ruff::checks_gen::CheckCodePrefix;
+use ruff::flake8_pytest_style::types::{
+    ParametrizeNameType, ParametrizeValuesRowType, ParametrizeValuesType,
+};
 use ruff::flake8_quotes::settings::Quote;
 use ruff::flake8_tidy_imports::settings::Strictness;
+use ruff::pydocstyle::settings::Convention;
+use ruff::registry_gen::CheckCodePrefix;
 use ruff::settings::options::Options;
 use ruff::settings::pyproject::Pyproject;
 use ruff::{
-    flake8_annotations, flake8_bugbear, flake8_quotes, flake8_tidy_imports, mccabe, pep8_naming,
+    flake8_annotations, flake8_bugbear, flake8_errmsg, flake8_pytest_style, flake8_quotes,
+    flake8_tidy_imports, mccabe, pep8_naming, pydocstyle,
 };

+use crate::black::Black;
 use crate::plugin::Plugin;
 use crate::{parser, plugin};

 pub fn convert(
-    flake8: &HashMap<String, Option<String>>,
+    config: &HashMap<String, HashMap<String, Option<String>>>,
+    black: Option<&Black>,
    plugins: Option<Vec<Plugin>>,
 ) -> Result<Pyproject> {
+    // Extract the Flake8 section.
+    let flake8 = config
+        .get("flake8")
+        .expect("Unable to find flake8 section in INI file");
+
    // Extract all referenced check code prefixes, to power plugin inference.
    let mut referenced_codes: BTreeSet<CheckCodePrefix> = BTreeSet::default();
    for (key, value) in flake8 {
@@ -40,6 +52,19 @@ pub fn convert(
        }
    }

+    // Infer plugins, if not provided.
+    let plugins = plugins.unwrap_or_else(|| {
+        let from_options = plugin::infer_plugins_from_options(flake8);
+        if !from_options.is_empty() {
+            eprintln!("Inferred plugins from settings: {from_options:#?}");
+        }
+        let from_codes = plugin::infer_plugins_from_codes(&referenced_codes);
+        if !from_codes.is_empty() {
+            eprintln!("Inferred plugins from referenced check codes: {from_codes:#?}");
+        }
+        from_options.into_iter().chain(from_codes).collect()
+    });
+
    // Check if the user has specified a `select`. If not, we'll add our own
    // default `select`, and populate it based on user plugins.
    let mut select = flake8
@@ -49,17 +74,7 @@ pub fn convert(
                .as_ref()
                .map(|value| BTreeSet::from_iter(parser::parse_prefix_codes(value)))
        })
-        .unwrap_or_else(|| {
-            plugin::resolve_select(
-                flake8,
-                &plugins.unwrap_or_else(|| {
-                    plugin::infer_plugins_from_options(flake8)
-                        .into_iter()
-                        .chain(plugin::infer_plugins_from_codes(&referenced_codes))
-                        .collect()
-                }),
-            )
-        });
+        .unwrap_or_else(|| plugin::resolve_select(flake8, &plugins));
    let mut ignore = flake8
        .get("ignore")
        .and_then(|value| {
@@ -73,10 +88,13 @@ pub fn convert(
    let mut options = Options::default();
    let mut flake8_annotations = flake8_annotations::settings::Options::default();
    let mut flake8_bugbear = flake8_bugbear::settings::Options::default();
+    let mut flake8_errmsg = flake8_errmsg::settings::Options::default();
+    let mut flake8_pytest_style = flake8_pytest_style::settings::Options::default();
    let mut flake8_quotes = flake8_quotes::settings::Options::default();
    let mut flake8_tidy_imports = flake8_tidy_imports::settings::Options::default();
    let mut mccabe = mccabe::settings::Options::default();
    let mut pep8_naming = pep8_naming::settings::Options::default();
+    let mut pydocstyle = pydocstyle::settings::Options::default();
    for (key, value) in flake8 {
        if let Some(value) = value {
            match key.as_str() {
@@ -148,17 +166,17 @@ 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()) {
@@ -186,20 +204,100 @@ pub fn convert(
                    _ => eprintln!("Unexpected '{key}' value: {value}"),
                },
                // flake8-docstrings
-                "docstring-convention" => {
-                    // No-op (handled above).
-                }
+                "docstring-convention" => match value.trim() {
+                    "google" => pydocstyle.convention = Some(Convention::Google),
+                    "numpy" => pydocstyle.convention = Some(Convention::Numpy),
+                    "pep257" => pydocstyle.convention = Some(Convention::Pep257),
+                    "all" => pydocstyle.convention = None,
+                    _ => eprintln!("Unexpected '{key}' value: {value}"),
+                },
                // mccabe
                "max-complexity" | "max_complexity" => match value.clone().parse::<usize>() {
                    Ok(max_complexity) => mccabe.max_complexity = Some(max_complexity),
                    Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
                },
+                // flake8-errmsg
+                "errmsg-max-string-length" | "errmsg_max_string_length" => {
+                    match value.clone().parse::<usize>() {
+                        Ok(max_string_length) => {
+                            flake8_errmsg.max_string_length = Some(max_string_length);
+                        }
+                        Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
+                    }
+                }
+                // flake8-pytest-style
+                "pytest-fixture-no-parentheses" | "pytest_fixture_no_parentheses " => {
+                    match parser::parse_bool(value.as_ref()) {
+                        Ok(bool) => flake8_pytest_style.fixture_parentheses = Some(!bool),
+                        Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
+                    }
+                }
+                "pytest-parametrize-names-type" | "pytest_parametrize_names_type" => {
+                    match value.trim() {
+                        "csv" => {
+                            flake8_pytest_style.parametrize_names_type =
+                                Some(ParametrizeNameType::CSV);
+                        }
+                        "tuple" => {
+                            flake8_pytest_style.parametrize_names_type =
+                                Some(ParametrizeNameType::Tuple);
+                        }
+                        "list" => {
+                            flake8_pytest_style.parametrize_names_type =
+                                Some(ParametrizeNameType::List);
+                        }
+                        _ => eprintln!("Unexpected '{key}' value: {value}"),
+                    }
+                }
+                "pytest-parametrize-values-type" | "pytest_parametrize_values_type" => {
+                    match value.trim() {
+                        "tuple" => {
+                            flake8_pytest_style.parametrize_values_type =
+                                Some(ParametrizeValuesType::Tuple);
+                        }
+                        "list" => {
+                            flake8_pytest_style.parametrize_values_type =
+                                Some(ParametrizeValuesType::List);
+                        }
+                        _ => eprintln!("Unexpected '{key}' value: {value}"),
+                    }
+                }
+                "pytest-parametrize-values-row-type" | "pytest_parametrize_values_row_type" => {
+                    match value.trim() {
+                        "tuple" => {
+                            flake8_pytest_style.parametrize_values_row_type =
+                                Some(ParametrizeValuesRowType::Tuple);
+                        }
+                        "list" => {
+                            flake8_pytest_style.parametrize_values_row_type =
+                                Some(ParametrizeValuesRowType::List);
+                        }
+                        _ => eprintln!("Unexpected '{key}' value: {value}"),
+                    }
+                }
+                "pytest-raises-require-match-for" | "pytest_raises_require_match_for" => {
+                    flake8_pytest_style.raises_require_match_for =
+                        Some(parser::parse_strings(value.as_ref()));
+                }
+                "pytest-mark-no-parentheses" | "pytest_mark_no_parentheses" => {
+                    match parser::parse_bool(value.as_ref()) {
+                        Ok(bool) => flake8_pytest_style.mark_parentheses = Some(!bool),
+                        Err(e) => eprintln!("Unable to parse '{key}' property: {e}"),
+                    }
+                }
                // Unknown
                _ => eprintln!("Skipping unsupported property: {key}"),
            }
        }
    }

+    // Set default `convention`.
+    if plugins.contains(&Plugin::Flake8Docstrings) {
+        if pydocstyle.convention.is_none() {
+            pydocstyle.convention = Some(Convention::Pep257);
+        }
+    }
+
    // Deduplicate and sort.
    options.select = Some(Vec::from_iter(select));
    options.ignore = Some(Vec::from_iter(ignore));
@@ -209,6 +307,12 @@ pub fn convert(
    if flake8_bugbear != flake8_bugbear::settings::Options::default() {
        options.flake8_bugbear = Some(flake8_bugbear);
    }
+    if flake8_errmsg != flake8_errmsg::settings::Options::default() {
+        options.flake8_errmsg = Some(flake8_errmsg);
+    }
+    if flake8_pytest_style != flake8_pytest_style::settings::Options::default() {
+        options.flake8_pytest_style = Some(flake8_pytest_style);
+    }
    if flake8_quotes != flake8_quotes::settings::Options::default() {
        options.flake8_quotes = Some(flake8_quotes);
    }
@@ -221,6 +325,22 @@ pub fn convert(
    if pep8_naming != pep8_naming::settings::Options::default() {
        options.pep8_naming = Some(pep8_naming);
    }
+    if pydocstyle != pydocstyle::settings::Options::default() {
+        options.pydocstyle = Some(pydocstyle);
+    }
+
+    // Extract any settings from the existing `pyproject.toml`.
+    if let Some(black) = black {
+        if let Some(line_length) = &black.line_length {
+            options.line_length = Some(*line_length);
+        }
+
+        if let Some(target_version) = &black.target_version {
+            if let Some(target_version) = target_version.iter().min() {
+                options.target_version = Some(*target_version);
+            }
+        }
+    }

    // Create the pyproject.toml.
    Ok(Pyproject::new(options))
@@ -231,19 +351,25 @@ mod tests {
    use std::collections::HashMap;

    use anyhow::Result;
-    use ruff::checks_gen::CheckCodePrefix;
-    use ruff::flake8_quotes;
+    use ruff::pydocstyle::settings::Convention;
+    use ruff::registry_gen::CheckCodePrefix;
    use ruff::settings::options::Options;
    use ruff::settings::pyproject::Pyproject;
+    use ruff::{flake8_quotes, pydocstyle};

    use crate::converter::convert;
    use crate::plugin::Plugin;

    #[test]
    fn it_converts_empty() -> Result<()> {
-        let actual = convert(&HashMap::from([]), None)?;
+        let actual = convert(
+            &HashMap::from([("flake8".to_string(), HashMap::default())]),
+            None,
+            None,
+        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -252,12 +378,15 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -268,14 +397,19 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
+            flake8_pytest_style: None,
            flake8_quotes: None,
            flake8_tidy_imports: None,
            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -286,11 +420,16 @@ mod tests {
    #[test]
    fn it_converts_dashes() -> Result<()> {
        let actual = convert(
-            &HashMap::from([("max-line-length".to_string(), Some("100".to_string()))]),
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("max-line-length".to_string(), Some("100".to_string()))]),
+            )]),
+            None,
            Some(vec![]),
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -299,12 +438,15 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: Some(100),
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -315,14 +457,19 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
+            flake8_pytest_style: None,
            flake8_quotes: None,
            flake8_tidy_imports: None,
            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -333,11 +480,16 @@ mod tests {
    #[test]
    fn it_converts_underscores() -> Result<()> {
        let actual = convert(
-            &HashMap::from([("max_line_length".to_string(), Some("100".to_string()))]),
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("max_line_length".to_string(), Some("100".to_string()))]),
+            )]),
+            None,
            Some(vec![]),
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -346,12 +498,15 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: Some(100),
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -362,14 +517,19 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
+            flake8_pytest_style: None,
            flake8_quotes: None,
            flake8_tidy_imports: None,
            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -380,11 +540,16 @@ mod tests {
    #[test]
    fn it_ignores_parse_errors() -> Result<()> {
        let actual = convert(
-            &HashMap::from([("max_line_length".to_string(), Some("abc".to_string()))]),
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("max_line_length".to_string(), Some("abc".to_string()))]),
+            )]),
+            None,
            Some(vec![]),
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -393,12 +558,15 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -409,14 +577,19 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
+            flake8_pytest_style: None,
            flake8_quotes: None,
            flake8_tidy_imports: None,
            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -427,11 +600,16 @@ mod tests {
    #[test]
    fn it_converts_plugin_options() -> Result<()> {
        let actual = convert(
-            &HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            )]),
+            None,
            Some(vec![]),
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -440,12 +618,15 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -456,8 +637,11 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
+            flake8_pytest_style: None,
            flake8_quotes: Some(flake8_quotes::settings::Options {
                inline_quotes: Some(flake8_quotes::settings::Quote::Single),
                multiline_quotes: None,
@@ -466,9 +650,11 @@ mod tests {
            }),
            flake8_tidy_imports: None,
            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -480,13 +666,18 @@ mod tests {
    fn it_converts_docstring_conventions() -> Result<()> {
        let actual = convert(
            &HashMap::from([(
-                "docstring-convention".to_string(),
-                Some("numpy".to_string()),
+                "flake8".to_string(),
+                HashMap::from([(
+                    "docstring-convention".to_string(),
+                    Some("numpy".to_string()),
+                )]),
            )]),
+            None,
            Some(vec![Plugin::Flake8Docstrings]),
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -495,50 +686,17 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
-                CheckCodePrefix::D100,
-                CheckCodePrefix::D101,
-                CheckCodePrefix::D102,
-                CheckCodePrefix::D103,
-                CheckCodePrefix::D104,
-                CheckCodePrefix::D105,
-                CheckCodePrefix::D106,
-                CheckCodePrefix::D200,
-                CheckCodePrefix::D201,
-                CheckCodePrefix::D202,
-                CheckCodePrefix::D204,
-                CheckCodePrefix::D205,
-                CheckCodePrefix::D206,
-                CheckCodePrefix::D207,
-                CheckCodePrefix::D208,
-                CheckCodePrefix::D209,
-                CheckCodePrefix::D210,
-                CheckCodePrefix::D211,
-                CheckCodePrefix::D214,
-                CheckCodePrefix::D215,
-                CheckCodePrefix::D300,
-                CheckCodePrefix::D301,
-                CheckCodePrefix::D400,
-                CheckCodePrefix::D403,
-                CheckCodePrefix::D404,
-                CheckCodePrefix::D405,
-                CheckCodePrefix::D406,
-                CheckCodePrefix::D407,
-                CheckCodePrefix::D408,
-                CheckCodePrefix::D409,
-                CheckCodePrefix::D410,
-                CheckCodePrefix::D411,
-                CheckCodePrefix::D412,
-                CheckCodePrefix::D414,
-                CheckCodePrefix::D418,
-                CheckCodePrefix::D419,
                CheckCodePrefix::E,
                CheckCodePrefix::F,
                CheckCodePrefix::W,
@@ -547,14 +705,21 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
+            flake8_pytest_style: None,
            flake8_quotes: None,
            flake8_tidy_imports: None,
            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: Some(pydocstyle::settings::Options {
+                convention: Some(Convention::Numpy),
+            }),
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
@@ -565,11 +730,16 @@ mod tests {
    #[test]
    fn it_infers_plugins_if_omitted() -> Result<()> {
        let actual = convert(
-            &HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            &HashMap::from([(
+                "flake8".to_string(),
+                HashMap::from([("inline-quotes".to_string(), Some("single".to_string()))]),
+            )]),
+            None,
            None,
        )?;
        let expected = Pyproject::new(Options {
            allowed_confusables: None,
+            cache_dir: None,
            dummy_variable_rgx: None,
            exclude: None,
            extend: None,
@@ -578,12 +748,15 @@ mod tests {
            extend_select: None,
            external: None,
            fix: None,
+            fix_only: None,
            fixable: None,
            format: None,
+            force_exclude: None,
            ignore: Some(vec![]),
            ignore_init_module_imports: None,
            line_length: None,
            per_file_ignores: None,
+            required_version: None,
            respect_gitignore: None,
            select: Some(vec![
                CheckCodePrefix::E,
@@ -595,8 +768,11 @@ mod tests {
            src: None,
            target_version: None,
            unfixable: None,
+            update_check: None,
            flake8_annotations: None,
            flake8_bugbear: None,
+            flake8_errmsg: None,
+            flake8_pytest_style: None,
            flake8_quotes: Some(flake8_quotes::settings::Options {
                inline_quotes: Some(flake8_quotes::settings::Quote::Single),
                multiline_quotes: None,
@@ -605,9 +781,11 @@ mod tests {
            }),
            flake8_tidy_imports: None,
            flake8_import_conventions: None,
+            flake8_unused_arguments: None,
            isort: None,
            mccabe: None,
            pep8_naming: None,
+            pydocstyle: None,
            pyupgrade: None,
        });
        assert_eq!(actual, expected);
--- a/flake8_to_ruff/src/lib.rs
+++ b/flake8_to_ruff/src/lib.rs
@@ -11,6 +11,7 @@
    clippy::too_many_lines
 )]

+pub mod black;
 pub mod converter;
 mod parser;
 pub mod plugin;
--- a/flake8_to_ruff/src/main.rs
+++ b/flake8_to_ruff/src/main.rs
@@ -17,6 +17,7 @@ use std::path::PathBuf;
 use anyhow::Result;
 use clap::Parser;
 use configparser::ini::Ini;
+use flake8_to_ruff::black::parse_black_options;
 use flake8_to_ruff::converter;
 use flake8_to_ruff::plugin::Plugin;

@@ -26,10 +27,14 @@ use flake8_to_ruff::plugin::Plugin;
    long_about = None
 )]
 struct Cli {
-    /// Path to the Flake8 configuration file (e.g., 'setup.cfg', 'tox.ini', or
-    /// '.flake8').
+    /// Path to the Flake8 configuration file (e.g., `setup.cfg`, `tox.ini`, or
+    /// `.flake8`).
    #[arg(required = true)]
    file: PathBuf,
+    /// Optional path to a `pyproject.toml` file, used to ensure compatibility
+    /// with Black.
+    #[arg(long)]
+    pyproject: Option<PathBuf>,
    /// List of plugins to enable.
    #[arg(long, value_delimiter = ',')]
    plugin: Option<Vec<Plugin>>,
@@ -43,13 +48,15 @@ fn main() -> Result<()> {
    ini.set_multiline(true);
    let config = ini.load(cli.file).map_err(|msg| anyhow::anyhow!(msg))?;

-    // Extract the Flake8 section.
-    let flake8 = config
-        .get("flake8")
-        .expect("Unable to find flake8 section in INI file");
+    // Read the pyproject.toml file.
+    let black = cli
+        .pyproject
+        .map(parse_black_options)
+        .transpose()?
+        .flatten();

-    // Create the pyproject.toml.
-    let pyproject = converter::convert(flake8, cli.plugin)?;
+    // Create Ruff's pyproject.toml section.
+    let pyproject = converter::convert(&config, black.as_ref(), cli.plugin)?;
    println!("{}", toml::to_string_pretty(&pyproject)?);

    Ok(())
--- a/flake8_to_ruff/src/parser.rs
+++ b/flake8_to_ruff/src/parser.rs
@@ -3,7 +3,8 @@ use std::str::FromStr;
 use anyhow::{bail, Result};
 use once_cell::sync::Lazy;
 use regex::Regex;
-use ruff::checks_gen::CheckCodePrefix;
+use ruff::registry::PREFIX_REDIRECTS;
+use ruff::registry_gen::CheckCodePrefix;
 use ruff::settings::types::PatternPrefixPair;
 use rustc_hash::FxHashMap;

@@ -18,7 +19,9 @@ pub fn parse_prefix_codes(value: &str) -> Vec<CheckCodePrefix> {
        if code.is_empty() {
            continue;
        }
-        if let Ok(code) = CheckCodePrefix::from_str(code) {
+        if let Some(code) = PREFIX_REDIRECTS.get(code) {
+            codes.push(code.clone());
+        } else if let Ok(code) = CheckCodePrefix::from_str(code) {
            codes.push(code);
        } else {
            eprintln!("Unsupported prefix code: {code}");
@@ -83,16 +86,22 @@ impl State {
    fn parse(&self) -> Vec<PatternPrefixPair> {
        let mut codes: Vec<PatternPrefixPair> = vec![];
        for code in &self.codes {
-            match CheckCodePrefix::from_str(code) {
-                Ok(code) => {
-                    for filename in &self.filenames {
-                        codes.push(PatternPrefixPair {
-                            pattern: filename.clone(),
-                            prefix: code.clone(),
-                        });
-                    }
+            if let Some(code) = PREFIX_REDIRECTS.get(code.as_str()) {
+                for filename in &self.filenames {
+                    codes.push(PatternPrefixPair {
+                        pattern: filename.clone(),
+                        prefix: code.clone(),
+                    });
                }
-                Err(_) => eprintln!("Skipping unrecognized prefix: {code}"),
+            } else if let Ok(code) = CheckCodePrefix::from_str(code) {
+                for filename in &self.filenames {
+                    codes.push(PatternPrefixPair {
+                        pattern: filename.clone(),
+                        prefix: code.clone(),
+                    });
+                }
+            } else {
+                eprintln!("Unsupported prefix code: {code}");
            }
        }
        codes
@@ -192,7 +201,7 @@ pub fn collect_per_file_ignores(
 #[cfg(test)]
 mod tests {
    use anyhow::Result;
-    use ruff::checks_gen::CheckCodePrefix;
+    use ruff::registry_gen::CheckCodePrefix;
    use ruff::settings::types::PatternPrefixPair;

    use crate::parser::{parse_files_to_codes_mapping, parse_prefix_codes, parse_strings};
--- a/flake8_to_ruff/src/plugin.rs
+++ b/flake8_to_ruff/src/plugin.rs
@@ -1,10 +1,11 @@
 use std::collections::{BTreeSet, HashMap};
+use std::fmt;
 use std::str::FromStr;

 use anyhow::anyhow;
-use ruff::checks_gen::CheckCodePrefix;
+use ruff::registry_gen::CheckCodePrefix;

-#[derive(Debug, Clone, Ord, PartialOrd, Eq, PartialEq)]
+#[derive(Clone, Ord, PartialOrd, Eq, PartialEq)]
 pub enum Plugin {
    Flake8Annotations,
    Flake8Bandit,
@@ -12,16 +13,21 @@ pub enum Plugin {
    Flake8Bugbear,
    Flake8Builtins,
    Flake8Comprehensions,
+    Flake8Datetimez,
    Flake8Debugger,
    Flake8Docstrings,
    Flake8Eradicate,
+    Flake8ErrMsg,
+    Flake8ImplicitStrConcat,
    Flake8Print,
+    Flake8PytestStyle,
    Flake8Quotes,
    Flake8Return,
    Flake8Simplify,
    Flake8TidyImports,
    McCabe,
    PEP8Naming,
+    PandasVet,
    Pyupgrade,
 }

@@ -36,15 +42,20 @@ impl FromStr for Plugin {
            "flake8-bugbear" => Ok(Plugin::Flake8Bugbear),
            "flake8-builtins" => Ok(Plugin::Flake8Builtins),
            "flake8-comprehensions" => Ok(Plugin::Flake8Comprehensions),
+            "flake8-datetimez" => Ok(Plugin::Flake8Datetimez),
            "flake8-debugger" => Ok(Plugin::Flake8Debugger),
            "flake8-docstrings" => Ok(Plugin::Flake8Docstrings),
-            "flake8-eradicate" => Ok(Plugin::Flake8BlindExcept),
+            "flake8-eradicate" => Ok(Plugin::Flake8Eradicate),
+            "flake8-errmsg" => Ok(Plugin::Flake8ErrMsg),
+            "flake8-implicit-str-concat" => Ok(Plugin::Flake8ImplicitStrConcat),
            "flake8-print" => Ok(Plugin::Flake8Print),
+            "flake8-pytest-style" => Ok(Plugin::Flake8PytestStyle),
            "flake8-quotes" => Ok(Plugin::Flake8Quotes),
            "flake8-return" => Ok(Plugin::Flake8Return),
            "flake8-simplify" => Ok(Plugin::Flake8Simplify),
            "flake8-tidy-imports" => Ok(Plugin::Flake8TidyImports),
            "mccabe" => Ok(Plugin::McCabe),
+            "pandas-vet" => Ok(Plugin::PandasVet),
            "pep8-naming" => Ok(Plugin::PEP8Naming),
            "pyupgrade" => Ok(Plugin::Pyupgrade),
            _ => Err(anyhow!("Unknown plugin: {string}")),
@@ -52,26 +63,66 @@ impl FromStr for Plugin {
    }
 }

+impl fmt::Debug for Plugin {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "{}",
+            match self {
+                Plugin::Flake8Annotations => "flake8-annotations",
+                Plugin::Flake8Bandit => "flake8-bandit",
+                Plugin::Flake8BlindExcept => "flake8-blind-except",
+                Plugin::Flake8Bugbear => "flake8-bugbear",
+                Plugin::Flake8Builtins => "flake8-builtins",
+                Plugin::Flake8Comprehensions => "flake8-comprehensions",
+                Plugin::Flake8Datetimez => "flake8-datetimez",
+                Plugin::Flake8Debugger => "flake8-debugger",
+                Plugin::Flake8Docstrings => "flake8-docstrings",
+                Plugin::Flake8Eradicate => "flake8-eradicate",
+                Plugin::Flake8ErrMsg => "flake8-errmsg",
+                Plugin::Flake8ImplicitStrConcat => "flake8-implicit-str-concat",
+                Plugin::Flake8Print => "flake8-print",
+                Plugin::Flake8PytestStyle => "flake8-pytest-style",
+                Plugin::Flake8Quotes => "flake8-quotes",
+                Plugin::Flake8Return => "flake8-return",
+                Plugin::Flake8Simplify => "flake8-simplify",
+                Plugin::Flake8TidyImports => "flake8-tidy-imports",
+                Plugin::McCabe => "mccabe",
+                Plugin::PEP8Naming => "pep8-naming",
+                Plugin::PandasVet => "pandas-vet",
+                Plugin::Pyupgrade => "pyupgrade",
+            }
+        )
+    }
+}
+
 impl Plugin {
    pub fn default(&self) -> CheckCodePrefix {
        match self {
            Plugin::Flake8Annotations => CheckCodePrefix::ANN,
            Plugin::Flake8Bandit => CheckCodePrefix::S,
+            // TODO(charlie): Handle rename of `B` to `BLE`.
            Plugin::Flake8BlindExcept => CheckCodePrefix::BLE,
            Plugin::Flake8Bugbear => CheckCodePrefix::B,
            Plugin::Flake8Builtins => CheckCodePrefix::A,
            Plugin::Flake8Comprehensions => CheckCodePrefix::C4,
+            Plugin::Flake8Datetimez => CheckCodePrefix::DTZ,
            Plugin::Flake8Debugger => CheckCodePrefix::T1,
            Plugin::Flake8Docstrings => CheckCodePrefix::D,
+            // 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::Flake8PytestStyle => CheckCodePrefix::PT,
            Plugin::Flake8Quotes => CheckCodePrefix::Q,
            Plugin::Flake8Return => CheckCodePrefix::RET,
            Plugin::Flake8Simplify => CheckCodePrefix::SIM,
-            Plugin::Flake8TidyImports => CheckCodePrefix::I25,
+            Plugin::Flake8TidyImports => CheckCodePrefix::TID25,
            Plugin::McCabe => CheckCodePrefix::C9,
+            Plugin::PandasVet => CheckCodePrefix::PD,
            Plugin::PEP8Naming => CheckCodePrefix::N,
-            Plugin::Pyupgrade => CheckCodePrefix::U,
+            Plugin::Pyupgrade => CheckCodePrefix::UP,
        }
    }

@@ -83,6 +134,7 @@ impl Plugin {
            Plugin::Flake8Bugbear => vec![CheckCodePrefix::B],
            Plugin::Flake8Builtins => vec![CheckCodePrefix::A],
            Plugin::Flake8Comprehensions => vec![CheckCodePrefix::C4],
+            Plugin::Flake8Datetimez => vec![CheckCodePrefix::DTZ],
            Plugin::Flake8Debugger => vec![CheckCodePrefix::T1],
            Plugin::Flake8Docstrings => {
                // Use the user-provided docstring.
@@ -97,26 +149,30 @@ impl Plugin {
                        }
                    }
                }
-                // Default to PEP8.
-                DocstringConvention::PEP8.select()
+                // Default to PEP257.
+                DocstringConvention::Pep257.select()
            }
            Plugin::Flake8Eradicate => vec![CheckCodePrefix::ERA],
+            Plugin::Flake8ErrMsg => vec![CheckCodePrefix::EM],
+            Plugin::Flake8ImplicitStrConcat => vec![CheckCodePrefix::ISC],
            Plugin::Flake8Print => vec![CheckCodePrefix::T2],
+            Plugin::Flake8PytestStyle => vec![CheckCodePrefix::PT],
            Plugin::Flake8Quotes => vec![CheckCodePrefix::Q],
            Plugin::Flake8Return => vec![CheckCodePrefix::RET],
            Plugin::Flake8Simplify => vec![CheckCodePrefix::SIM],
-            Plugin::Flake8TidyImports => vec![CheckCodePrefix::I25],
+            Plugin::Flake8TidyImports => vec![CheckCodePrefix::TID],
            Plugin::McCabe => vec![CheckCodePrefix::C9],
+            Plugin::PandasVet => vec![CheckCodePrefix::PD],
            Plugin::PEP8Naming => vec![CheckCodePrefix::N],
-            Plugin::Pyupgrade => vec![CheckCodePrefix::U],
+            Plugin::Pyupgrade => vec![CheckCodePrefix::UP],
        }
    }
 }

 pub enum DocstringConvention {
    All,
-    PEP8,
-    NumPy,
+    Pep257,
+    Numpy,
    Google,
 }

@@ -126,8 +182,8 @@ impl FromStr for DocstringConvention {
    fn from_str(string: &str) -> Result<Self, Self::Err> {
        match string {
            "all" => Ok(DocstringConvention::All),
-            "pep8" => Ok(DocstringConvention::PEP8),
-            "numpy" => Ok(DocstringConvention::NumPy),
+            "pep257" => Ok(DocstringConvention::Pep257),
+            "numpy" => Ok(DocstringConvention::Numpy),
            "google" => Ok(DocstringConvention::Google),
            _ => Err(anyhow!("Unknown docstring convention: {string}")),
        }
@@ -138,151 +194,14 @@ impl DocstringConvention {
    fn select(&self) -> Vec<CheckCodePrefix> {
        match self {
            DocstringConvention::All => vec![CheckCodePrefix::D],
-            DocstringConvention::PEP8 => vec![
-                // All errors except D203, D212, D213, D214, D215, D404, D405, D406, D407, D408,
-                // D409, D410, D411, D413, D415, D416 and D417.
-                CheckCodePrefix::D100,
-                CheckCodePrefix::D101,
-                CheckCodePrefix::D102,
-                CheckCodePrefix::D103,
-                CheckCodePrefix::D104,
-                CheckCodePrefix::D105,
-                CheckCodePrefix::D106,
-                CheckCodePrefix::D107,
-                CheckCodePrefix::D200,
-                CheckCodePrefix::D201,
-                CheckCodePrefix::D202,
-                // CheckCodePrefix::D203,
-                CheckCodePrefix::D204,
-                CheckCodePrefix::D205,
-                CheckCodePrefix::D206,
-                CheckCodePrefix::D207,
-                CheckCodePrefix::D208,
-                CheckCodePrefix::D209,
-                CheckCodePrefix::D210,
-                CheckCodePrefix::D211,
-                // CheckCodePrefix::D212,
-                // CheckCodePrefix::D213,
-                // CheckCodePrefix::D214,
-                // CheckCodePrefix::D215,
-                CheckCodePrefix::D300,
-                CheckCodePrefix::D301,
-                CheckCodePrefix::D400,
-                CheckCodePrefix::D402,
-                CheckCodePrefix::D403,
-                // CheckCodePrefix::D404,
-                // CheckCodePrefix::D405,
-                // CheckCodePrefix::D406,
-                // CheckCodePrefix::D407,
-                // CheckCodePrefix::D408,
-                // CheckCodePrefix::D409,
-                // CheckCodePrefix::D410,
-                // CheckCodePrefix::D411,
-                CheckCodePrefix::D412,
-                // CheckCodePrefix::D413,
-                CheckCodePrefix::D414,
-                // CheckCodePrefix::D415,
-                // CheckCodePrefix::D416,
-                // CheckCodePrefix::D417,
-                CheckCodePrefix::D418,
-                CheckCodePrefix::D419,
+            DocstringConvention::Pep257 => vec![
+                // Covered by the `convention` setting.
            ],
-            DocstringConvention::NumPy => vec![
-                // All errors except D107, D203, D212, D213, D402, D413, D415, D416, and D417.
-                CheckCodePrefix::D100,
-                CheckCodePrefix::D101,
-                CheckCodePrefix::D102,
-                CheckCodePrefix::D103,
-                CheckCodePrefix::D104,
-                CheckCodePrefix::D105,
-                CheckCodePrefix::D106,
-                // CheckCodePrefix::D107,
-                CheckCodePrefix::D200,
-                CheckCodePrefix::D201,
-                CheckCodePrefix::D202,
-                // CheckCodePrefix::D203,
-                CheckCodePrefix::D204,
-                CheckCodePrefix::D205,
-                CheckCodePrefix::D206,
-                CheckCodePrefix::D207,
-                CheckCodePrefix::D208,
-                CheckCodePrefix::D209,
-                CheckCodePrefix::D210,
-                CheckCodePrefix::D211,
-                // CheckCodePrefix::D212,
-                // CheckCodePrefix::D213,
-                CheckCodePrefix::D214,
-                CheckCodePrefix::D215,
-                CheckCodePrefix::D300,
-                CheckCodePrefix::D301,
-                CheckCodePrefix::D400,
-                // CheckCodePrefix::D402,
-                CheckCodePrefix::D403,
-                CheckCodePrefix::D404,
-                CheckCodePrefix::D405,
-                CheckCodePrefix::D406,
-                CheckCodePrefix::D407,
-                CheckCodePrefix::D408,
-                CheckCodePrefix::D409,
-                CheckCodePrefix::D410,
-                CheckCodePrefix::D411,
-                CheckCodePrefix::D412,
-                // CheckCodePrefix::D413,
-                CheckCodePrefix::D414,
-                // CheckCodePrefix::D415,
-                // CheckCodePrefix::D416,
-                // CheckCodePrefix::D417,
-                CheckCodePrefix::D418,
-                CheckCodePrefix::D419,
+            DocstringConvention::Numpy => vec![
+                // Covered by the `convention` setting.
            ],
            DocstringConvention::Google => vec![
-                // All errors except D203, D204, D213, D215, D400, D401, D404, D406, D407, D408,
-                // D409 and D413.
-                CheckCodePrefix::D100,
-                CheckCodePrefix::D101,
-                CheckCodePrefix::D102,
-                CheckCodePrefix::D103,
-                CheckCodePrefix::D104,
-                CheckCodePrefix::D105,
-                CheckCodePrefix::D106,
-                CheckCodePrefix::D107,
-                CheckCodePrefix::D200,
-                CheckCodePrefix::D201,
-                CheckCodePrefix::D202,
-                // CheckCodePrefix::D203,
-                // CheckCodePrefix::D204,
-                CheckCodePrefix::D205,
-                CheckCodePrefix::D206,
-                CheckCodePrefix::D207,
-                CheckCodePrefix::D208,
-                CheckCodePrefix::D209,
-                CheckCodePrefix::D210,
-                CheckCodePrefix::D211,
-                CheckCodePrefix::D212,
-                // CheckCodePrefix::D213,
-                CheckCodePrefix::D214,
-                // CheckCodePrefix::D215,
-                CheckCodePrefix::D300,
-                CheckCodePrefix::D301,
-                // CheckCodePrefix::D400,
-                CheckCodePrefix::D402,
-                CheckCodePrefix::D403,
-                // CheckCodePrefix::D404,
-                CheckCodePrefix::D405,
-                // CheckCodePrefix::D406,
-                // CheckCodePrefix::D407,
-                // CheckCodePrefix::D408,
-                // CheckCodePrefix::D409,
-                CheckCodePrefix::D410,
-                CheckCodePrefix::D411,
-                CheckCodePrefix::D412,
-                // CheckCodePrefix::D413,
-                CheckCodePrefix::D414,
-                CheckCodePrefix::D415,
-                CheckCodePrefix::D416,
-                CheckCodePrefix::D417,
-                CheckCodePrefix::D418,
-                CheckCodePrefix::D419,
+                // Covered by the `convention` setting.
            ],
        }
    }
@@ -343,6 +262,25 @@ pub fn infer_plugins_from_options(flake8: &HashMap<String, Option<String>>) -> V
            "eradicate-whitelist-extend" | "eradicate_whitelist_extend" => {
                plugins.insert(Plugin::Flake8Eradicate);
            }
+            // flake8-pytest-style
+            "pytest-fixture-no-parentheses" | "pytest_fixture_no_parentheses " => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            "pytest-parametrize-names-type" | "pytest_parametrize_names_type" => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            "pytest-parametrize-values-type" | "pytest_parametrize_values_type" => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            "pytest-parametrize-values-row-type" | "pytest_parametrize_values_row_type" => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            "pytest-raises-require-match-for" | "pytest_raises_require_match_for" => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
+            "pytest-mark-no-parentheses" | "pytest_mark_no_parentheses" => {
+                plugins.insert(Plugin::Flake8PytestStyle);
+            }
            // flake8-quotes
            "quotes" | "inline-quotes" | "inline_quotes" => {
                plugins.insert(Plugin::Flake8Quotes);
@@ -377,6 +315,9 @@ pub fn infer_plugins_from_options(flake8: &HashMap<String, Option<String>>) -> V
            "staticmethod-decorators" | "staticmethod_decorators" => {
                plugins.insert(Plugin::PEP8Naming);
            }
+            "max-string-length" | "max_string_length" => {
+                plugins.insert(Plugin::Flake8ErrMsg);
+            }
            _ => {}
        }
    }
@@ -395,16 +336,19 @@ pub fn infer_plugins_from_codes(codes: &BTreeSet<CheckCodePrefix>) -> Vec<Plugin
        Plugin::Flake8Bugbear,
        Plugin::Flake8Builtins,
        Plugin::Flake8Comprehensions,
+        Plugin::Flake8Datetimez,
        Plugin::Flake8Debugger,
        Plugin::Flake8Docstrings,
        Plugin::Flake8Eradicate,
+        Plugin::Flake8ErrMsg,
+        Plugin::Flake8ImplicitStrConcat,
        Plugin::Flake8Print,
        Plugin::Flake8Quotes,
        Plugin::Flake8Return,
        Plugin::Flake8Simplify,
        Plugin::Flake8TidyImports,
+        Plugin::PandasVet,
        Plugin::PEP8Naming,
-        Plugin::Pyupgrade,
    ]
    .into_iter()
    .filter(|plugin| {
@@ -428,7 +372,7 @@ pub fn resolve_select(
    plugins: &[Plugin],
 ) -> BTreeSet<CheckCodePrefix> {
    // Include default Pyflakes and pycodestyle checks.
-    let mut select = BTreeSet::from([CheckCodePrefix::E, CheckCodePrefix::F, CheckCodePrefix::W]);
+    let mut select = BTreeSet::from([CheckCodePrefix::F, CheckCodePrefix::E, CheckCodePrefix::W]);

    // Add prefix codes for every plugin.
    for plugin in plugins {
--- a/playground/.eslintrc
+++ b/playground/.eslintrc
@@ -0,0 +1,25 @@
+{
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint", "prettier"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:react/recommended",
+    "plugin:react/jsx-runtime",
+    "plugin:react-hooks/recommended",
+    "plugin:import/recommended",
+    "plugin:import/typescript",
+    "plugin:prettier/recommended"
+  ],
+  "rules": {
+    // Disable some recommended rules that we don't want to enforce.
+    "@typescript-eslint/no-explicit-any": "off",
+    "@typescript-eslint/no-empty-function": "off"
+  },
+  "settings": {
+    "react": {
+      "version": "detect"
+    }
+  }
+}
--- a/playground/.gitignore
+++ b/playground/.gitignore
@@ -0,0 +1,130 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+.cache
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
--- a/playground/.prettierrc.json
+++ b/playground/.prettierrc.json
@@ -0,0 +1,3 @@
+{
+  "trailingComma": "all"
+}
--- a/playground/README.md
+++ b/playground/README.md
@@ -0,0 +1,14 @@
+# playground
+
+In-browser playground for Ruff. Available [https://ruff.pages.dev/](https://ruff.pages.dev/).
+
+## Getting started
+
+- To build the WASM module, run `wasm-pack build --target web --out-dir playground/src/pkg` from the
+  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
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta
+      name="description"
+      content="An in-browser playground for Ruff, an extremely fast Python linter written in Rust."
+    />
+    <meta name="keywords" content="ruff, python, rust, webassembly, wasm" />
+    <title>Ruff Playground</title>
+    <link
+      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>
+    <script type="module" src="/src/main.tsx"></script>
+  </body>
+</html>
--- a/playground/package-lock.json
+++ b/playground/package-lock.json
--- a/playground/package.json
+++ b/playground/package.json
@@ -0,0 +1,42 @@
+{
+  "name": "playground",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "build": "tsc && vite build",
+    "check": "npm run lint && npm run tsc",
+    "dev": "vite",
+    "fmt": "prettier --cache -w .",
+    "lint": "eslint --cache --ext .ts,.tsx src",
+    "preview": "vite preview",
+    "tsc": "tsc"
+  },
+  "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",
+    "react-dom": "^18.2.0"
+  },
+  "devDependencies": {
+    "@types/react": "^18.0.26",
+    "@types/react-dom": "^18.0.9",
+    "@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/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 +1,105 @@
+import classNames from "classnames";
+import RepoButton from "./RepoButton";
+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>
+      </div>
+      <div className={"flex items-center min-w-0"}>
+        {version ? (
+          <div className={"hidden sm:flex items-center"}>
+            <VersionTag>v{version}</VersionTag>
+          </div>
+        ) : null}
+        <div className="hidden sm:block mx-6 lg:mx-4 w-px h-6 bg-gray-200 dark:bg-gray-700" />
+        <RepoButton />
+        <div className="hidden sm:block mx-6 lg:mx-4 w-px h-6 bg-gray-200 dark:bg-gray-700" />
+        <div className="hidden sm:block">
+          <ShareButton key={edit} onShare={onShare} />
+        </div>
+        <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/RepoButton.tsx
+++ b/playground/src/Editor/RepoButton.tsx
@@ -0,0 +1,27 @@
+export default function RepoButton() {
+  return (
+    <a
+      className={"hover:text-ayu-accent/70 text-ayu-accent"}
+      href={"https://github.com/charliermarsh/ruff"}
+      target={"_blank"}
+      rel={"noreferrer"}
+    >
+      <svg
+        xmlns={"http://www.w3.org/2000/svg"}
+        width={"24"}
+        height={"24"}
+        viewBox={"0 0 16 16"}
+        fill={"none"}
+      >
+        <path
+          fillRule={"evenodd"}
+          clipRule={"evenodd"}
+          d={
+            "M8 0C3.58 0 0 3.58 0 8C0 11.54 2.29 14.53 5.47 15.59C5.87 15.66 6.02 15.42 6.02 15.21C6.02 15.02 6.01 14.39 6.01 13.72C4 14.09 3.48 13.23 3.32 12.78C3.23 12.55 2.84 11.84 2.5 11.65C2.22 11.5 1.82 11.13 2.49 11.12C3.12 11.11 3.57 11.7 3.72 11.94C4.44 13.15 5.59 12.81 6.05 12.6C6.12 12.08 6.33 11.73 6.56 11.53C4.78 11.33 2.92 10.64 2.92 7.58C2.92 6.71 3.23 5.99 3.74 5.43C3.66 5.23 3.38 4.41 3.82 3.31C3.82 3.31 4.49 3.1 6.02 4.13C6.66 3.95 7.34 3.86 8.02 3.86C8.7 3.86 9.38 3.95 10.02 4.13C11.55 3.09 12.22 3.31 12.22 3.31C12.66 4.41 12.38 5.23 12.3 5.43C12.81 5.99 13.12 6.7 13.12 7.58C13.12 10.65 11.25 11.33 9.47 11.53C9.76 11.78 10.01 12.26 10.01 13.01C10.01 14.08 10 14.94 10 15.21C10 15.42 10.15 15.67 10.55 15.59C13.71 14.53 16 11.53 16 8C16 3.58 12.42 0 8 0Z"
+          }
+          fill={"currentColor"}
+        />
+      </svg>
+    </a>
+  );
+}
--- 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/70 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 +1,117 @@
+/**
+ * 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}: ${check.message}`,
+        severity: MarkerSeverity.Error,
+        tags:
+          check.code === "F401" || check.code === "F841"
+            ? [MarkerTag.Unnecessary]
+            : [],
+      })),
+    );
+
+    const codeActionProvider = monaco?.languages.registerCodeActionProvider(
+      "python",
+      {
+        // @ts-expect-error: The type definition is wrong.
+        provideCodeActions: function (model, position) {
+          const actions = checks
+            .filter((check) => position.startLineNumber === check.location.row)
+            .filter((check) => check.fix)
+            .map((check) => ({
+              title: check.fix
+                ? `${check.code}: ${check.fix.message}` ?? `Fix ${check.code}`
+                : "Autofix",
+              id: `fix-${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/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
@@ -0,0 +1,10 @@
+import React from "react";
+import ReactDOM from "react-dom/client";
+import Editor from "./Editor";
+import "./index.css";
+
+ReactDOM.createRoot(document.getElementById("root") as HTMLElement).render(
+  <React.StrictMode>
+    <Editor />
+  </React.StrictMode>,
+);
--- a/playground/src/third-party.d.ts
+++ b/playground/src/third-party.d.ts
@@ -0,0 +1,6 @@
+declare module "lz-string" {
+  function decompressFromEncodedURIComponent(
+    input: string | null,
+  ): string | null;
+  function compressToEncodedURIComponent(input: string | null): string;
+}
--- a/playground/src/vite-env.d.ts
+++ b/playground/src/vite-env.d.ts
@@ -0,0 +1 @@
+/// <reference types="vite/client" />
--- 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": "#fa8d3e",
+        "ayu-background": {
+          DEFAULT: "#f8f9fa",
+          dark: "#0b0e14",
+        },
+      },
+      fontFamily: {
+        sans: ["Inter var", ...defaultTheme.fontFamily.sans],
+      },
+    },
+  },
+  plugins: [],
+};
--- a/playground/tsconfig.json
+++ b/playground/tsconfig.json
@@ -0,0 +1,21 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "useDefineForClassFields": true,
+    "lib": ["DOM", "DOM.Iterable", "ESNext"],
+    "allowJs": false,
+    "skipLibCheck": true,
+    "esModuleInterop": false,
+    "allowSyntheticDefaultImports": true,
+    "strict": true,
+    "forceConsistentCasingInFileNames": true,
+    "module": "ESNext",
+    "moduleResolution": "Node",
+    "resolveJsonModule": true,
+    "isolatedModules": true,
+    "noEmit": true,
+    "jsx": "react-jsx"
+  },
+  "include": ["src"],
+  "references": [{ "path": "./tsconfig.node.json" }]
+}
--- a/playground/tsconfig.node.json
+++ b/playground/tsconfig.node.json
@@ -0,0 +1,9 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "module": "ESNext",
+    "moduleResolution": "Node",
+    "allowSyntheticDefaultImports": true
+  },
+  "include": ["vite.config.ts"]
+}
--- a/playground/vite.config.ts
+++ b/playground/vite.config.ts
@@ -0,0 +1,7 @@
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react-swc";
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [react()],
+});
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,19 @@
+[build-system]
+requires = ["maturin>=0.14,<0.15"]
+build-backend = "maturin"
+
 [project]
 name = "ruff"
+version = "0.0.209"
+description = "An extremely fast Python linter, written in Rust."
+authors = [
+  { name = "Charlie Marsh", email = "charlie.r.marsh@gmail.com" },
+]
+maintainers = [
+  { name = "Charlie Marsh", email = "charlie.r.marsh@gmail.com" },
+]
+requires-python = ">=3.7"
+license = { file = "LICENSE" }
 keywords = ["automation", "flake8", "pycodestyle", "pyflakes", "pylint", "clippy"]
 classifiers = [
    "Development Status :: 3 - Alpha",
@@ -12,26 +26,13 @@ classifiers = [
    "Programming Language :: Python :: 3.8",
    "Programming Language :: Python :: 3.9",
    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
    "Programming Language :: Python :: 3 :: Only",
    "Topic :: Software Development :: Libraries :: Python Modules",
    "Topic :: Software Development :: Quality Assurance",
 ]
-author = "Charlie Marsh"
-author_email = "charlie.r.marsh@gmail.com"
-description = "An extremely fast Python linter, written in Rust."
-requires-python = ">=3.7"
-
-[project.urls]
-repository = "https://github.com/charliermarsh/ruff"
-
-[build-system]
-requires = ["maturin>=0.14,<0.15"]
-build-backend = "maturin"
+urls = { repository = "https://github.com/charliermarsh/ruff-lsp" }

 [tool.maturin]
 bindings = "bin"
 strip = true
-
-[tool.ruff.isort]
-force-wrap-aliases = true
-combine-as-imports = true
--- a/resources/test/fixtures/flake8_bandit/S105.py
+++ b/resources/test/fixtures/flake8_bandit/S105.py
@@ -51,3 +51,12 @@ secret == "s3cr3t"
 token == "s3cr3t"
 secrete == "s3cr3t"
 password == safe == "s3cr3t"
+
+if token == "1\n2":
+    pass
+
+if token == "3\t4":
+    pass
+
+if token == "5\r6":
+    pass
--- a/resources/test/fixtures/flake8_boolean_trap/FBT.py
+++ b/resources/test/fixtures/flake8_boolean_trap/FBT.py
@@ -55,3 +55,5 @@ a.get("hello", False)
 {}.pop(True, False)
 dict.fromkeys(("world",), True)
 {}.deploy(True, False)
+getattr(someobj, attrname, False)
+mylist.index(True)
--- a/resources/test/fixtures/flake8_datetimez/DTZ001.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ001.py
@@ -0,0 +1,21 @@
+import datetime
+
+# no args
+datetime.datetime(2000, 1, 1, 0, 0, 0)
+
+# none args
+datetime.datetime(2000, 1, 1, 0, 0, 0, 0, None)
+
+# not none arg
+datetime.datetime(2000, 1, 1, 0, 0, 0, 0, datetime.timezone.utc)
+
+# no kwargs
+datetime.datetime(2000, 1, 1, fold=1)
+
+# none kwargs
+datetime.datetime(2000, 1, 1, tzinfo=None)
+
+from datetime import datetime
+
+# no args unqualified
+datetime(2000, 1, 1, 0, 0, 0)
--- a/resources/test/fixtures/flake8_datetimez/DTZ002.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ002.py
@@ -0,0 +1,9 @@
+import datetime
+
+# qualified
+datetime.datetime.today()
+
+from datetime import datetime
+
+# unqualified
+datetime.today()
--- a/resources/test/fixtures/flake8_datetimez/DTZ003.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ003.py
@@ -0,0 +1,9 @@
+import datetime
+
+# qualified
+datetime.datetime.utcnow()
+
+from datetime import datetime
+
+# unqualified
+datetime.utcnow()
--- a/resources/test/fixtures/flake8_datetimez/DTZ004.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ004.py
@@ -0,0 +1,9 @@
+import datetime
+
+# qualified
+datetime.datetime.utcfromtimestamp(1234)
+
+from datetime import datetime
+
+# unqualified
+datetime.utcfromtimestamp(1234)
--- a/resources/test/fixtures/flake8_datetimez/DTZ005.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ005.py
@@ -0,0 +1,18 @@
+import datetime
+
+# no args
+datetime.datetime.now()
+
+# wrong keywords
+datetime.datetime.now(bad=datetime.timezone.utc)
+
+# none args
+datetime.datetime.now(None)
+
+# none keywords
+datetime.datetime.now(tz=None)
+
+from datetime import datetime
+
+# no args unqualified
+datetime.now()
--- a/resources/test/fixtures/flake8_datetimez/DTZ006.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ006.py
@@ -0,0 +1,18 @@
+import datetime
+
+# no args
+datetime.datetime.fromtimestamp(1234)
+
+# wrong keywords
+datetime.datetime.fromtimestamp(1234, bad=datetime.timezone.utc)
+
+# none args
+datetime.datetime.fromtimestamp(1234, None)
+
+# none keywords
+datetime.datetime.fromtimestamp(1234, tz=None)
+
+from datetime import datetime
+
+# no args unqualified
+datetime.fromtimestamp(1234)
--- a/resources/test/fixtures/flake8_datetimez/DTZ007.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ007.py
@@ -0,0 +1,35 @@
+import datetime
+
+# bad format
+datetime.datetime.strptime("something", "%H:%M:%S%Z")
+
+# no replace or astimezone
+datetime.datetime.strptime("something", "something")
+
+# wrong replace
+datetime.datetime.strptime("something", "something").replace(hour=1)
+
+# none replace
+datetime.datetime.strptime("something", "something").replace(tzinfo=None)
+
+# OK
+datetime.datetime.strptime("something", "something").replace(
+    tzinfo=datetime.timezone.utc
+)
+
+# OK
+datetime.datetime.strptime("something", "something").astimezone()
+
+# OK
+datetime.datetime.strptime("something", "%H:%M:%S%z")
+
+# OK
+datetime.datetime.strptime("something", something).astimezone()
+
+# OK
+datetime.datetime.strptime("something", something).replace(tzinfo=datetime.timezone.utc)
+
+from datetime import datetime
+
+# no replace orastimezone unqualified
+datetime.strptime("something", "something")
--- a/resources/test/fixtures/flake8_datetimez/DTZ011.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ011.py
@@ -0,0 +1,9 @@
+import datetime
+
+# qualified
+datetime.date.today()
+
+from datetime import date
+
+# unqualified
+date.today()
--- a/resources/test/fixtures/flake8_datetimez/DTZ012.py
+++ b/resources/test/fixtures/flake8_datetimez/DTZ012.py
@@ -0,0 +1,9 @@
+import datetime
+
+# qualified
+datetime.date.fromtimestamp(1234)
+
+from datetime import date
+
+# unqualified
+date.fromtimestamp(1234)
--- a/resources/test/fixtures/flake8_debugger/T100.py
+++ b/resources/test/fixtures/flake8_debugger/T100.py
@@ -1,6 +1,5 @@
 breakpoint()

-
 import pdb
 import builtins
 from builtins import breakpoint
@@ -9,7 +8,6 @@ from celery.contrib.rdb import set_trace
 from celery.contrib import rdb
 import celery.contrib.rdb

-
 breakpoint()
 st()
 set_trace()
--- a/resources/test/fixtures/flake8_errmsg/EM.py
+++ b/resources/test/fixtures/flake8_errmsg/EM.py
@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+
+def f_a():
+    raise RuntimeError("This is an example exception")
+
+
+def f_a_short():
+    raise RuntimeError("Error")
+
+
+def f_b():
+    example = "example"
+    raise RuntimeError(f"This is an {example} exception")
+
+
+def f_c():
+    raise RuntimeError("This is an {example} exception".format(example="example"))
+
+
+def f_ok():
+    msg = "hello"
+    raise RuntimeError(msg)
--- 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_pie/PIE790.py
+++ b/resources/test/fixtures/flake8_pie/PIE790.py
@@ -0,0 +1,115 @@
+class Foo:
+    """buzz"""
+
+    pass  # PIE790
+
+
+if foo:
+    """foo"""
+    pass  # PIE790
+
+
+if foo:
+    pass
+else:
+    """bar"""
+    pass  # PIE790
+
+
+while True:
+    pass
+else:
+    """bar"""
+    pass  # PIE790
+
+
+for _ in range(10):
+    pass
+else:
+    """bar"""
+    pass  # PIE790
+
+
+async for _ in range(10):
+    pass
+else:
+    """bar"""
+    pass  # PIE790
+
+
+def foo() -> None:
+    """
+    buzz
+    """
+
+    pass  # PIE790
+
+
+async def foo():
+    """
+    buzz
+    """
+
+    pass  # PIE790
+
+
+try:
+    """
+    buzz
+    """
+    pass  # PIE790
+except ValueError:
+    pass
+
+
+try:
+    bar()
+except ValueError:
+    """bar"""
+    pass  # PIE790
+
+
+for _ in range(10):
+    """buzz"""
+    pass  # PIE790
+
+async for _ in range(10):
+    """buzz"""
+    pass  # PIE790
+
+while cond:
+    """buzz"""
+    pass  # PIE790
+
+
+with bar:
+    """buzz"""
+    pass  # PIE790
+
+async with bar:
+    """buzz"""
+    pass  # PIE790
+
+
+class Foo:
+    # bar
+    pass
+
+
+if foo:
+    # foo
+    pass
+
+
+class Error(Exception):
+    pass
+
+
+try:
+    foo()
+except NetworkError:
+    pass
+
+
+def foo() -> None:
+    pass
--- a/resources/test/fixtures/flake8_pie/PIE794.py
+++ b/resources/test/fixtures/flake8_pie/PIE794.py
@@ -0,0 +1,33 @@
+class Foo(BaseModel):
+    name = StringField()
+    # ....
+    name = StringField()  # PIE794
+
+    def remove(self) -> None:
+        ...
+
+
+class Foo(BaseModel):
+    name: str = StringField()
+    # ....
+    name = StringField()  # PIE794
+
+    def foo(self) -> None:
+        ...
+
+
+class User(BaseModel):
+    bar: str = StringField()
+    foo: bool = BooleanField()
+    # ...
+    bar = StringField()  # PIE794
+
+
+class User(BaseModel):
+    @property
+    def buzz(self) -> str:
+        ...
+
+    @buzz.setter
+    def buzz(self, value: str | int) -> None:
+        ...
--- a/resources/test/fixtures/flake8_pie/PIE807.py
+++ b/resources/test/fixtures/flake8_pie/PIE807.py
@@ -0,0 +1,20 @@
+@dataclass
+class Foo:
+    foo: List[str] = field(default_factory=lambda: [])  # PIE807
+
+
+class FooTable(BaseTable):
+    bar = fields.ListField(default=lambda: [])  # PIE807
+
+
+class FooTable(BaseTable):
+    bar = fields.ListField(lambda: [])  # PIE807
+
+
+@dataclass
+class Foo:
+    foo: List[str] = field(default_factory=list)
+
+
+class FooTable(BaseTable):
+    bar = fields.ListField(list)
--- a/resources/test/fixtures/flake8_print/T201.py
+++ b/resources/test/fixtures/flake8_print/T201.py
@@ -1 +1,10 @@
+import sys
+import tempfile
+
 print("Hello, world!")  # T201
+print("Hello, world!", file=None)  # T201
+print("Hello, world!", file=sys.stdout)  # T201
+print("Hello, world!", file=sys.stderr)  # T201
+
+with tempfile.NamedTemporaryFile() as fp:
+    print("Hello, world!", file=fp)  # OK
--- a/resources/test/fixtures/flake8_print/T203.py
+++ b/resources/test/fixtures/flake8_print/T203.py
@@ -2,7 +2,6 @@ from pprint import pprint

 pprint("Hello, world!")  # T203

-
 import pprint

 pprint.pprint("Hello, world!")  # T203
--- a/resources/test/fixtures/flake8_pytest_style/PT001.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT001.py
@@ -0,0 +1,78 @@
+import pytest
+from pytest import fixture
+from pytest import fixture as aliased
+
+
+# `import pytest`
+
+
+@pytest.fixture
+def no_parentheses():
+    return 42
+
+
+@pytest.fixture()
+def parentheses_no_params():
+    return 42
+
+
+@pytest.fixture(scope="module")
+def parentheses_with_params():
+    return 42
+
+
+@pytest.fixture(
+
+)
+def parentheses_no_params_multiline():
+    return 42
+
+
+# `from pytest import fixture`
+
+
+@fixture
+def imported_from_no_parentheses():
+    return 42
+
+
+@fixture()
+def imported_from_parentheses_no_params():
+    return 42
+
+
+@fixture(scope="module")
+def imported_from_parentheses_with_params():
+    return 42
+
+
+@fixture(
+
+)
+def imported_from_parentheses_no_params_multiline():
+    return 42
+
+
+# `from pytest import fixture as aliased`
+
+
+@aliased
+def aliased_no_parentheses():
+    return 42
+
+
+@aliased()
+def aliased_parentheses_no_params():
+    return 42
+
+
+@aliased(scope="module")
+def aliased_parentheses_with_params():
+    return 42
+
+
+@aliased(
+
+)
+def aliased_parentheses_no_params_multiline():
+    return 42
--- a/resources/test/fixtures/flake8_pytest_style/PT002.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT002.py
@@ -0,0 +1,21 @@
+import pytest
+
+
+@pytest.fixture()
+def my_fixture():  # OK no args
+    return 0
+
+
+@pytest.fixture(scope="module")
+def my_fixture():  # OK only kwargs
+    return 0
+
+
+@pytest.fixture("module")
+def my_fixture():  # Error only args
+    return 0
+
+
+@pytest.fixture("module", autouse=True)
+def my_fixture():  # Error mixed
+    return 0
--- a/resources/test/fixtures/flake8_pytest_style/PT003.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT003.py
@@ -0,0 +1,16 @@
+import pytest
+
+
+@pytest.fixture()
+def ok_no_scope():
+    ...
+
+
+@pytest.fixture(scope="module")
+def ok_other_scope():
+    ...
+
+
+@pytest.fixture(scope="function")
+def error():
+    ...
--- a/resources/test/fixtures/flake8_pytest_style/PT004.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT004.py
@@ -0,0 +1,58 @@
+import abc
+from abc import abstractmethod
+
+import pytest
+
+
+@pytest.fixture()
+def _patch_something(mocker):  # OK simple
+    mocker.patch("some.thing")
+
+
+@pytest.fixture()
+def _patch_something(mocker):  # OK with return
+    if something:
+        return
+    mocker.patch("some.thing")
+
+
+@pytest.fixture()
+def _activate_context():  # OK with yield
+    with context:
+        yield
+
+
+class BaseTest:
+    @pytest.fixture()
+    @abc.abstractmethod
+    def my_fixture():  # OK abstract with import abc
+        raise NotImplementedError
+
+
+class BaseTest:
+    @pytest.fixture()
+    @abstractmethod
+    def my_fixture():  # OK abstract with from import
+        raise NotImplementedError
+
+
+@pytest.fixture()
+def my_fixture():  # OK ignoring yield from
+    yield from some_generator()
+
+
+
+@pytest.fixture()
+def my_fixture():  # OK ignoring yield value
+    yield 1
+
+
+@pytest.fixture()
+def patch_something(mocker):  # Error simple
+    mocker.patch("some.thing")
+
+
+@pytest.fixture()
+def activate_context():  # Error with yield
+    with context:
+        yield
--- a/resources/test/fixtures/flake8_pytest_style/PT005.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT005.py
@@ -0,0 +1,57 @@
+import abc
+from abc import abstractmethod
+
+import pytest
+
+
+@pytest.fixture()
+def my_fixture(mocker):  # OK with return
+    return 0
+
+
+@pytest.fixture()
+def activate_context():  # OK with yield
+    with get_context() as context:
+        yield context
+
+
+@pytest.fixture()
+def _any_fixture(mocker):  # Ok nested function
+    def nested_function():
+        return 1
+
+    mocker.patch("...", nested_function)
+
+
+class BaseTest:
+    @pytest.fixture()
+    @abc.abstractmethod
+    def _my_fixture():  # OK abstract with import abc
+        return NotImplemented
+
+
+class BaseTest:
+    @pytest.fixture()
+    @abstractmethod
+    def _my_fixture():  # OK abstract with from import
+        return NotImplemented
+
+
+@pytest.fixture()
+def _my_fixture(mocker):  # Error with return
+    return 0
+
+
+@pytest.fixture()
+def _activate_context():  # Error with yield
+    with get_context() as context:
+        yield context
+
+
+@pytest.fixture()
+def _activate_context():  # Error with conditional yield from
+    if some_condition:
+        with get_context() as context:
+            yield context
+    else:
+        yield from other_context()
--- a/resources/test/fixtures/flake8_pytest_style/PT006.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT006.py
@@ -0,0 +1,36 @@
+import pytest
+
+
+@pytest.mark.parametrize("param", [1, 2, 3])
+def test_always_ok(param):
+    ...
+
+
+@pytest.mark.parametrize("param1,param2", [(1, 2), (3, 4)])
+def test_csv(param1, param2):
+    ...
+
+
+@pytest.mark.parametrize("   param1,   ,    param2   , ", [(1, 2), (3, 4)])
+def test_csv_with_whitespace(param1, param2):
+    ...
+
+
+@pytest.mark.parametrize(("param1", "param2"), [(1, 2), (3, 4)])
+def test_tuple(param1, param2):
+    ...
+
+
+@pytest.mark.parametrize(("param1",), [1, 2, 3])
+def test_tuple_one_elem(param1, param2):
+    ...
+
+
+@pytest.mark.parametrize(["param1", "param2"], [(1, 2), (3, 4)])
+def test_list(param1, param2):
+    ...
+
+
+@pytest.mark.parametrize(["param1"], [1, 2, 3])
+def test_list_one_elem(param1, param2):
+    ...
--- a/resources/test/fixtures/flake8_pytest_style/PT007.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT007.py
@@ -0,0 +1,55 @@
+import pytest
+
+
+@pytest.mark.parametrize("param", (1, 2))
+def test_tuple(param):
+    ...
+
+
+@pytest.mark.parametrize(
+    ("param1", "param2"),
+    (
+        (1, 2),
+        (3, 4),
+    ),
+)
+def test_tuple_of_tuples(param1, param2):
+    ...
+
+
+@pytest.mark.parametrize(
+    ("param1", "param2"),
+    (
+        [1, 2],
+        [3, 4],
+    ),
+)
+def test_tuple_of_lists(param1, param2):
+    ...
+
+
+@pytest.mark.parametrize("param", [1, 2])
+def test_list(param):
+    ...
+
+
+@pytest.mark.parametrize(
+    ("param1", "param2"),
+    [
+        (1, 2),
+        (3, 4),
+    ],
+)
+def test_list_of_tuples(param1, param2):
+    ...
+
+
+@pytest.mark.parametrize(
+    ("param1", "param2"),
+    [
+        [1, 2],
+        [3, 4],
+    ],
+)
+def test_list_of_lists(param1, param2):
+    ...
--- a/resources/test/fixtures/flake8_pytest_style/PT008.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT008.py
@@ -0,0 +1,48 @@
+# OK
+
+mocker.patch("module.name", not_lambda)
+module_mocker.patch("module.name", not_lambda)
+mocker.patch.object(obj, "attr", not_lambda)
+module_mocker.patch.object(obj, "attr", not_lambda)
+
+mocker.patch("module.name", return_value=None)
+module_mocker.patch("module.name", return_value=None)
+mocker.patch.object(obj, "attr", return_value=None)
+module_mocker.patch.object(obj, "attr", return_value=None)
+
+mocker.patch("module.name", lambda x, y: x)
+module_mocker.patch("module.name", lambda x, y: x)
+mocker.patch.object(obj, "attr", lambda x, y: x)
+module_mocker.patch.object(obj, "attr", lambda x, y: x)
+
+mocker.patch("module.name", lambda *args: args)
+module_mocker.patch("module.name", lambda *args: args)
+mocker.patch.object(obj, "attr", lambda *args: args)
+module_mocker.patch.object(obj, "attr", lambda *args: args)
+
+mocker.patch("module.name", lambda **kwargs: kwargs)
+module_mocker.patch("module.name", lambda **kwargs: kwargs)
+mocker.patch.object(obj, "attr", lambda **kwargs: kwargs)
+module_mocker.patch.object(obj, "attr", lambda **kwargs: kwargs)
+
+mocker.patch("module.name", lambda x, /, y: x)
+module_mocker.patch("module.name", lambda x, /, y: x)
+mocker.patch.object(obj, "attr", lambda x, /, y: x)
+module_mocker.patch.object(obj, "attr", lambda x, /, y: x)
+
+# Error
+
+mocker.patch("module.name", lambda: None)
+module_mocker.patch("module.name", lambda: None)
+mocker.patch.object(obj, "attr", lambda: None)
+module_mocker.patch.object(obj, "attr", lambda: None)
+
+mocker.patch("module.name", lambda x, y: None)
+module_mocker.patch("module.name", lambda x, y: None)
+mocker.patch.object(obj, "attr", lambda x, y: None)
+module_mocker.patch.object(obj, "attr", lambda x, y: None)
+
+mocker.patch("module.name", lambda *args, **kwargs: None)
+module_mocker.patch("module.name", lambda *args, **kwargs: None)
+mocker.patch.object(obj, "attr", lambda *args, **kwargs: None)
+module_mocker.patch.object(obj, "attr", lambda *args, **kwargs: None)
--- a/resources/test/fixtures/flake8_pytest_style/PT009.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT009.py
@@ -0,0 +1,9 @@
+import pytest
+
+
+def test_xxx():
+    assert 1 == 1  # OK no parameters
+
+
+def test_xxx():
+    self.assertEqual(1, 1)  # Error
--- a/resources/test/fixtures/flake8_pytest_style/PT010.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT010.py
@@ -0,0 +1,11 @@
+import pytest
+
+
+def test_ok():
+    with pytest.raises():
+        pass
+
+
+def test_error():
+    with pytest.raises(UnicodeError):
+        pass
--- a/resources/test/fixtures/flake8_pytest_style/PT011.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT011.py
@@ -0,0 +1,32 @@
+import socket
+
+import pytest
+
+
+def test_ok():
+    with pytest.raises(ValueError, match="Can't divide by 0"):
+        raise ValueError("Can't divide by 0")
+
+
+def test_ok_different_error_from_config():
+    with pytest.raises(ZeroDivisionError):
+        raise ZeroDivisionError("Can't divide by 0")
+
+
+def test_error_no_argument_given():
+    with pytest.raises(ValueError):
+        raise ValueError("Can't divide 1 by 0")
+
+    with pytest.raises(socket.error):
+        raise ValueError("Can't divide 1 by 0")
+
+
+def test_error_match_is_empty():
+    with pytest.raises(ValueError, match=None):
+        raise ValueError("Can't divide 1 by 0")
+
+    with pytest.raises(ValueError, match=""):
+        raise ValueError("Can't divide 1 by 0")
+
+    with pytest.raises(ValueError, match=f""):
+        raise ValueError("Can't divide 1 by 0")
--- a/resources/test/fixtures/flake8_pytest_style/PT012.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT012.py
@@ -0,0 +1,64 @@
+import pytest
+
+
+def test_ok():
+    with pytest.raises(AttributeError):
+        [].size
+
+
+async def test_ok_trivial_with():
+    with pytest.raises(AttributeError):
+        with context_manager_under_test():
+            pass
+
+    with pytest.raises(AttributeError):
+        async with context_manager_under_test():
+            pass
+
+
+def test_ok_complex_single_call():
+    with pytest.raises(AttributeError):
+        my_func(
+            [].size,
+            [].size,
+        )
+
+
+def test_error_multiple_statements():
+    with pytest.raises(AttributeError):
+        len([])
+        [].size
+
+
+async def test_error_complex_statement():
+    with pytest.raises(AttributeError):
+        if True:
+            [].size
+
+    with pytest.raises(AttributeError):
+        for i in []:
+            [].size
+
+    with pytest.raises(AttributeError):
+        async for i in []:
+            [].size
+
+    with pytest.raises(AttributeError):
+        while True:
+            [].size
+
+    with pytest.raises(AttributeError):
+        with context_manager_under_test():
+            [].size
+
+    with pytest.raises(AttributeError):
+        async with context_manager_under_test():
+            [].size
+
+
+def test_error_try():
+    with pytest.raises(AttributeError):
+        try:
+            [].size
+        except:
+            raise
--- a/resources/test/fixtures/flake8_pytest_style/PT013.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT013.py
@@ -0,0 +1,13 @@
+# OK
+
+import pytest
+import pytest as pytest
+from notpytest import fixture
+from . import fixture
+from .pytest import fixture
+
+# Error
+
+import pytest as other_name
+from pytest import fixture
+from pytest import fixture as other_name
--- a/resources/test/fixtures/flake8_pytest_style/PT015.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT015.py
@@ -0,0 +1,25 @@
+import pytest
+
+
+def test_ok():
+    assert [0]
+
+
+def test_error():
+    assert None
+    assert False
+    assert 0
+    assert 0.0
+    assert ""
+    assert f""
+    assert []
+    assert ()
+    assert {}
+    assert list()
+    assert set()
+    assert tuple()
+    assert dict()
+    assert frozenset()
+    assert list([])
+    assert set(set())
+    assert tuple("")
--- a/resources/test/fixtures/flake8_pytest_style/PT016.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT016.py
@@ -0,0 +1,17 @@
+import pytest
+
+
+def test_xxx():
+    pytest.fail("this is a failure")  # Test OK arg
+
+
+def test_xxx():
+    pytest.fail(msg="this is a failure")  # Test OK kwarg
+
+
+def test_xxx():  # Error
+    pytest.fail()
+    pytest.fail("")
+    pytest.fail(f"")
+    pytest.fail(msg="")
+    pytest.fail(msg=f"")
--- a/resources/test/fixtures/flake8_pytest_style/PT017.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT017.py
@@ -0,0 +1,19 @@
+import pytest
+
+
+def test_ok():
+    try:
+        something()
+    except Exception as e:
+        something_else()
+
+    with pytest.raises(ZeroDivisionError) as e:
+        1 / 0
+    assert e.value.message
+
+
+def test_error():
+    try:
+        something()
+    except Exception as e:
+        assert e.message, "blah blah"
--- a/resources/test/fixtures/flake8_pytest_style/PT018.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT018.py
@@ -0,0 +1,18 @@
+import pytest
+
+
+def test_ok():
+    assert something
+    assert something or something_else
+    assert something or something_else and something_third
+    assert not (something and something_else)
+
+
+def test_error():
+    assert something and something_else
+    assert something and something_else and something_third
+    assert something and not something_else
+    assert something and (something_else or something_third)
+    assert not (something or something_else)
+    assert not (something or something_else or something_third)
+    assert not (something or something_else and something_third)
--- a/resources/test/fixtures/flake8_pytest_style/PT019.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT019.py
@@ -0,0 +1,14 @@
+def test_xxx(fixture):  # Ok good param name
+    pass
+
+
+def xxx(_param):  # Ok not a test
+    pass
+
+
+def test_xxx(_fixture):  # Error arg
+    pass
+
+
+def test_xxx(*, _fixture):  # Error kwonly
+    pass
--- a/resources/test/fixtures/flake8_pytest_style/PT020.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT020.py
@@ -0,0 +1,21 @@
+import pytest
+
+
+@pytest.fixture()
+def ok_no_parameters():
+    return 0
+
+
+@pytest.fixture
+def ok_without_parens():
+    return 0
+
+
+@pytest.yield_fixture()
+def error_without_parens():
+    return 0
+
+
+@pytest.yield_fixture
+def error_with_parens():
+    return 0
--- a/resources/test/fixtures/flake8_pytest_style/PT021.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT021.py
@@ -0,0 +1,58 @@
+import functools
+
+import pytest
+
+
+@pytest.fixture()
+def my_fixture():  # OK return
+    return 0
+
+
+@pytest.fixture()
+def my_fixture():  # OK yield
+    resource = acquire_resource()
+    yield resource
+    resource.release()
+
+
+@pytest.fixture()
+def my_fixture():  # OK other request
+    request = get_request()
+    request.addfinalizer(finalizer)
+    return request
+
+
+def create_resource(arg, request):  # OK other function
+    resource = Resource(arg)
+    request.addfinalizer(resource.release)
+    return resource
+
+
+@pytest.fixture()
+def resource_factory(request):
+    return functools.partial(create_resource, request=request)
+
+
+@pytest.fixture()
+def resource_factory(request):  # OK other function
+    def create_resource(arg) -> Resource:
+        resource = Resource(arg)
+        request.addfinalizer(resource.release)
+        return resource
+
+    return create_resource
+
+
+@pytest.fixture()
+def my_fixture(request):  # Error return
+    resource = acquire_resource()
+    request.addfinalizer(resource.release)
+    return resource
+
+
+@pytest.fixture()
+def my_fixture(request):  # Error yield
+    resource = acquire_resource()
+    request.addfinalizer(resource.release)
+    yield resource
+    resource  # prevent PT022
--- a/resources/test/fixtures/flake8_pytest_style/PT022.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT022.py
@@ -0,0 +1,17 @@
+import pytest
+
+
+@pytest.fixture()
+def ok_complex_logic():
+    if some_condition:
+        resource = acquire_resource()
+        yield resource
+        resource.release()
+        return
+    yield None
+
+
+@pytest.fixture()
+def error():
+    resource = acquire_resource()
+    yield resource
--- a/resources/test/fixtures/flake8_pytest_style/PT023.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT023.py
@@ -0,0 +1,74 @@
+import pytest
+
+
+@pytest.mark.foo(scope="module")
+def ok_with_parameters_regardless_of_config():
+    pass
+
+
+# Without parentheses
+
+
+@pytest.mark.foo
+def test_something():
+    pass
+
+
+@pytest.mark.foo
+class TestClass:
+    def test_something():
+        pass
+
+
+class TestClass:
+    @pytest.mark.foo
+    def test_something():
+        pass
+
+
+class TestClass:
+    @pytest.mark.foo
+    class TestNestedClass:
+        def test_something():
+            pass
+
+
+class TestClass:
+    class TestNestedClass:
+        @pytest.mark.foo
+        def test_something():
+            pass
+
+
+# With parentheses
+
+
+@pytest.mark.foo()
+def test_something():
+    pass
+
+
+@pytest.mark.foo()
+class TestClass:
+    def test_something():
+        pass
+
+
+class TestClass:
+    @pytest.mark.foo()
+    def test_something():
+        pass
+
+
+class TestClass:
+    @pytest.mark.foo()
+    class TestNestedClass:
+        def test_something():
+            pass
+
+
+class TestClass:
+    class TestNestedClass:
+        @pytest.mark.foo()
+        def test_something():
+            pass
--- a/resources/test/fixtures/flake8_pytest_style/PT024.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT024.py
@@ -0,0 +1,35 @@
+import pytest
+
+
+@pytest.mark.asyncio()
+async def test_something():  # Ok not fixture
+    pass
+
+
+@pytest.mark.asyncio
+async def test_something():  # Ok not fixture no parens
+    pass
+
+
+@pytest.mark.asyncio()
+@pytest.fixture()
+async def my_fixture():  # Error before
+    return 0
+
+
+@pytest.mark.asyncio
+@pytest.fixture()
+async def my_fixture():  # Error before no parens
+    return 0
+
+
+@pytest.fixture()
+@pytest.mark.asyncio()
+async def my_fixture():  # Error after
+    return 0
+
+
+@pytest.fixture()
+@pytest.mark.asyncio
+async def my_fixture():  # Error after no parens
+    return 0
--- a/resources/test/fixtures/flake8_pytest_style/PT025.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT025.py
@@ -0,0 +1,18 @@
+import pytest
+
+
+@pytest.mark.usefixtures("a")
+def test_something():  # Ok not fixture
+    pass
+
+
+@pytest.mark.usefixtures("a")
+@pytest.fixture()
+def my_fixture():  # Error before
+    return 0
+
+
+@pytest.fixture()
+@pytest.mark.usefixtures("a")
+def my_fixture():  # Error after
+    return 0
--- a/resources/test/fixtures/flake8_pytest_style/PT026.py
+++ b/resources/test/fixtures/flake8_pytest_style/PT026.py
@@ -0,0 +1,26 @@
+import pytest
+
+
+@pytest.mark.usefixtures("a")
+def test_ok():
+    pass
+
+
+@pytest.mark.foo()
+def test_ok_another_mark_with_parens():
+    pass
+
+
+@pytest.mark.foo
+def test_ok_another_mark_no_parens():
+    pass
+
+
+@pytest.mark.usefixtures()
+def test_error_with_parens():
+    pass
+
+
+@pytest.mark.usefixtures
+def test_error_no_parens():
+    pass
--- a/resources/test/fixtures/flake8_return/RET504.py
+++ b/resources/test/fixtures/flake8_return/RET504.py
@@ -6,18 +6,6 @@ def x():
    return a  # error


-def x():
-    b, a = 1, 2
-    print(b)
-    return a  # error
-
-
-def x():
-    a = 1
-    print()
-    return a  # error
-
-
 def x():
    a = 1
    print(a)
@@ -53,7 +41,6 @@ def x():

 # https://github.com/afonasev/flake8-return/issues/47#issue-641117366
 def user_agent_username(username=None):
-
    if not username:
        return ""

@@ -136,6 +123,28 @@ def x():
    return a


+# Considered OK, since functions can have side effects.
+def x():
+    b, a = 1, 2
+    print(b)
+    return a
+
+
+# Considered OK, since functions can have side effects.
+def x():
+    a = 1
+    print()
+    return a
+
+
+# Considered OK, since attribute assignments can have side effects.
+class X:
+    def x(self):
+        a = self.property
+        self.property = None
+        return a
+
+
 # Test cases for using value for assignment then returning it
 # See:https://github.com/afonasev/flake8-return/issues/47
 def resolve_from_url(self, url: str) -> dict:
@@ -236,3 +245,18 @@ def close(self):
            any_failed = True
            report(traceback.format_exc())
    return any_failed
+
+
+def global_assignment():
+    global X
+    X = 1
+    return X
+
+
+def nonlocal_assignment():
+    X = 1
+
+    def inner():
+        nonlocal X
+        X = 1
+        return X
--- a/resources/test/fixtures/flake8_simplify/SIM118.py
+++ b/resources/test/fixtures/flake8_simplify/SIM118.py
@@ -1,12 +1,14 @@
-key in dict.keys() # SIM118
+key in obj.keys()  # SIM118

-foo["bar"] in dict.keys() # SIM118
+foo["bar"] in obj.keys()  # SIM118

-foo() in dict.keys() # SIM118
+foo['bar'] in obj.keys()  # SIM118

-for key in dict.keys(): # SIM118
+foo() in obj.keys()  # SIM118
+
+for key in obj.keys():  # SIM118
    pass

-for key in list(dict.keys()):
+for key in list(obj.keys()):
    if some_property(key):
-        del dict[key]
+        del obj[key]
--- a/resources/test/fixtures/flake8_simplify/SIM222.py
+++ b/resources/test/fixtures/flake8_simplify/SIM222.py
@@ -0,0 +1,14 @@
+if a or True:  # SIM223
+    pass
+
+if (a or b) or True:  # SIM223
+    pass
+
+if a or (b or True):  # SIM223
+    pass
+
+if a and True:
+    pass
+
+if True:
+    pass
--- a/Show More
+++ b/Show More