Modernize tooling: replace black with ruff format

.github/workflows/ci.yml

@@ -10,19 +10,22 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.12", "3.13"]
     steps:
       - uses: actions/checkout@v4
 
       - uses: astral-sh/setup-uv@v5
         with:
           python-version: ${{ matrix.python-version }}
 
-      - run: uv sync
+      - run: uv sync --frozen
 
       - name: Lint
         run: uv run ruff check .
 
+      - name: Format check
+        run: uv run ruff format --check .
+
       - name: Type check
         run: uv run mypy src
 

.python-version

@@ -1 +1 @@
-3.10
+3.12

README.md

@@ -19,7 +19,7 @@ just install     # Install dependencies (uv sync)
 just run         # Run the project
 just test        # Run tests (pytest)
 just lint        # Lint with ruff
-just format      # Format with black
+just format      # Format with ruff
 just typecheck   # Type check with mypy
 just check       # Run lint + typecheck + test
 ```
@@ -29,9 +29,9 @@ just check       # Run lint + typecheck + test
 - **uv** for fast dependency management and virtual environments
 - **just** as a command runner (replaces Makefiles)
 - **pytest** for testing with strict markers and config
-- **ruff** for linting, **black** for formatting, **mypy** for type checking
+- **ruff** for linting and formatting, **mypy** for type checking
 - **hatchling** build backend
-- Python 3.10+ compatibility
+- Python 3.12+ compatibility
 
 ## Customization Checklist
 

justfile

@@ -16,9 +16,12 @@ lint:
     uv run ruff check .
 
 format:
-    uv run black .
+    uv run ruff format .
 
 typecheck:
     uv run mypy src
 
-check: lint typecheck test
+format-check:
+    uv run ruff format --check .
+
+check: lint format-check typecheck test

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "myproject"
 version = "0.1.1"
-requires-python = ">=3.10"
+requires-python = ">=3.12"
 dependencies = []
 
 [build-system]
@@ -12,7 +12,7 @@ build-backend = "hatchling.build"
 packages = ["src/myproject"]
 
 [dependency-groups]
-dev = ["pytest", "ruff", "black", "mypy"]
+dev = ["pytest", "ruff", "mypy"]
 
 [tool.pytest.ini_options]
 addopts = "-ra -q --strict-markers --strict-config"
@@ -26,16 +26,16 @@ markers = [
 ]
 
 [tool.ruff]
-line-length = 88
+target-version = "py312"
+line-length = 120
 
 [tool.ruff.lint]
 select = ["E", "F", "W", "I"]
 
-[tool.black]
-line-length = 88
-target-version = ["py310"]
+[tool.ruff.format]
+quote-style = "double"
 
 [tool.mypy]
-python_version = "3.10"
+python_version = "3.12"
 check_untyped_defs = true
 ignore_missing_imports = true

tests/conftest.py

@@ -3,7 +3,6 @@
 import sys
 from pathlib import Path
 
-
 # Ensure tests can import the src-layout package without requiring prior installation.
 ROOT = Path(__file__).resolve().parents[1]
 SRC = ROOT / "src"