Modern Python
Configures Python projects with modern tooling (uv, ruff, ty). Use when creating projects, writing standalone scripts, or migrating from pip/Poetry/mypy/black.
Install
npx skills add trailofbits/skills --skill modern-pythongit clone --depth 1 https://github.com/trailofbits/skills.git /tmp/skills
mkdir -p ~/.claude/skills
cp -r /tmp/skills/plugins/modern-python/skills/modern-python ~/.claude/skills/modern-pythonPersonal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.
From the SKILL.md
# Modern Python Guide for modern Python tooling and best practices, based on [trailofbits/cookiecutter-python](https://github.com/trailofbits/cookiecutter-python). ## When to Use This Skill - Creating a new Python project or package - Setting up `pyproject.toml` configuration - Configuring development tools (linting, formatting, testing) - Writing Python scripts with external dependencies - Migrating from legacy tools (when user requests it) ## When NOT to Use This Skill - **User wants to keep legacy tooling**: Respect existing workflows if explicitly requested - **Python < 3.11 required**: These tools target modern Python - **Non-Python projects**: Mixed codebases where Python isn't primary ## Anti-Patterns to Avoid | Avoid | Use Instead | |-------|-------------| | `[tool.ty]` python-version | `[tool.ty.environment]` python-version | | `uv pip install` | `uv add` and `uv sync` | | Editing pyproject.toml manually to add deps | `uv add <pkg>` / `uv remove <pkg>` | | `hatchling` build backend | `uv_build` (simpler, sufficient for most cases) | | Poetry | uv (faster, simpler, better ecosystem integration) | | requirements.txt | PEP 723 for scripts, pyproject.toml for projects | | mypy / pyright | ty (faster, from Astral team) | | `[project.optional-dependencies]` for dev tools | `[dependency-groups]` (PEP 735) | | Manual virtualenv activation (`source .venv/bin/activate`) | `uv run <cmd>` | | pre-commit | prek (faster, no Python runtime needed) | **Key principles:**
Details
- Skill name
modern-python- Repository
- trailofbits/skills
- Path
plugins/modern-python/skills/modern-python/SKILL.md- License
- CC-BY-SA-4.0
- Repo updated
- 28 October 2026
FAQ
What does the Modern Python skill do?
Configures Python projects with modern tooling (uv, ruff, ty). Use when creating projects, writing standalone scripts, or migrating from pip/Poetry/mypy/black.
How do I install the Modern Python skill?
skills CLI (Claude Code, Cursor, Codex and more): npx skills add trailofbits/skills --skill modern-python. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.
Is Modern Python popular?
It lives in trailofbits/skills, which has 7,908 GitHub stars and 675 forks, and is included in 4 curated skill lists.
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