Agent skill
forge-lang-python
Python development standards including pytest, ruff, black, and mypy. Use when working with Python files, tests, or dependencies.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/testing/forge-lang-python
SKILL.md
Python Development
Testing
# Run all tests
pytest
# Run with coverage
pytest --cov=src --cov-report=term-missing
# Run specific test
pytest tests/test_module.py::test_function
# Run with verbose output
pytest -v
Linting
# Check with ruff
ruff check .
# Fix auto-fixable issues
ruff check --fix .
# Type checking
mypy src/
Formatting
# Format with ruff (or black)
ruff format .
# Check without changing
ruff format --check .
# Sort imports
ruff check --select I --fix .
Project Structure
project/
├── src/
│ └── package/
│ ├── __init__.py
│ └── module.py
├── tests/
│ ├── __init__.py
│ ├── conftest.py
│ └── test_module.py
├── pyproject.toml
└── README.md
pyproject.toml Template
[project]
name = "package-name"
version = "0.1.0"
requires-python = ">=3.10"
[tool.pytest.ini_options]
testpaths = ["tests"]
addopts = "-ra -q"
[tool.ruff]
line-length = 88
select = ["E", "F", "I", "N", "W"]
[tool.ruff.format]
quote-style = "double"
[tool.mypy]
python_version = "3.10"
strict = true
TDD Cycle Commands
# RED: Write test, run to see it fail
pytest tests/test_new_feature.py -v
# GREEN: Implement, run to see it pass
pytest tests/test_new_feature.py -v
# REFACTOR: Clean up, ensure tests still pass
pytest && ruff check . && ruff format --check .
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