What are Claude Code Skills?

Claude Code Skills are reusable prompt templates stored as markdown files in your project's .claude/skills/ directory. They let you codify best practices and common workflows into slash commands that Claude follows consistently.

How do I create a Claude Code Skill?

Create a markdown file in .claude/skills/ with instructions for Claude. The filename becomes the command name — for example, .claude/skills/code-review.md can be invoked with /code-review during a Claude Code session.

Can I share skills with my team?

Yes. Skills stored in .claude/skills/ can be committed to version control so every team member has access to the same standardized workflows. You can also organize skills into subdirectories by category.

What is the difference between project and global skills?

Project skills (.claude/skills/) are specific to the current project and are committed to git. Global skills (~/.claude/skills/) are personal skills available across all your projects.

python-library-quality

New

45Community RegistryGeneralby Will McGinnis

Quality-focused skills - security, performance, and API design

Community PluginView Source

Overview

A comprehensive set of Claude Code skills for professional Python library development, based on the guide at mcginniscommawill.com.

Installation

Step 1: Add the Marketplace

First, add this repository as a plugin marketplace in Claude Code:

code

/plugin marketplace add wdm0006/python-skills

Step 2: Install a Plugin Bundle

Install the complete skill set (recommended):

code

/plugin install python-library-complete@wdm0006-python-skills

Or install specific bundles based on your needs:

code

# Core skills for starting projects
/plugin install python-library-foundations@wdm0006-python-skills

# Skills for packaging and releasing
/plugin install python-library-distribution@wdm0006-python-skills

# Quality-focused skills (security, performance, API design)
/plugin install python-library-quality@wdm0006-python-skills

Alternative: Local Installation

For project-specific installation, clone this repository and copy the skills you need:

bash

# Clone the repository
git clone https://github.com/wdm0006/python-skills.git

# Copy skills to your project's .claude/skills/ directory
mkdir -p .claude/skills
cp -r python-skills/skills/* .claude/skills/

Or for global installation (available in all projects):

bash

# Copy to your personal Claude skills directory
mkdir -p ~/.claude/skills
cp -r python-skills/skills/* ~/.claude/skills/

Verifying Installation

After installation, you can verify the skills are loaded by running:

code

/plugin list

Note: Skills require Claude Code Pro, Max, Team, or Enterprise. Free tier users do not have access to Skills.

Available Skills

Skill	Description	Based On
setting-up-python-libraries	Project setup with pyproject.toml, uv, ruff, pytest, pre-commit, GitHub Actions	Defining Library Scope, Dependency Management, Licensing, pyproject.toml Explained
improving-python-code-quality	Ruff linting, mypy type checking, Pythonic idioms, refactoring	Linting & Formatting with Ruff, Understanding McCabe Complexity, Adding Type Hints
testing-python-libraries	Pytest test suites, fixtures, parametrization, Hypothesis property-based testing	Testing with Pytest, Testing Coverage, Testing with Tox, Testing with Mocking
auditing-python-security	Security audits with Bandit, pip-audit, Semgrep, detect-secrets	Avoiding Injection Flaws, Intro to Bandit, Dependency Security, Handling Sensitive Data, Secure Coding Practices
designing-python-apis	API design principles, deprecation, breaking changes, error handling	The Art of API Design, Designing for Developer Joy
documenting-python-libraries	Google-style docstrings, Sphinx setup, ReadTheDocs configuration	Writing Effective Docstrings, Getting Started with Sphinx, Automating Docs Deployment, Documenting Your Library's API
packaging-python-libraries	pyproject.toml, PyPI publishing, trusted publishing, wheel building	pyproject.toml Explained, Publishing PyGeohash
managing-python-releases	Semantic versioning, changelogs, release automation, deprecation workflows	Semantic Versioning
optimizing-python-performance	Profiling, memory analysis, benchmarking, optimization strategies	Performance Benchmarking, Profiling with PyInstrument, Memory Profiling with Memray
building-python-clis	Click/Typer CLIs, command groups, shell completion, CLI testing	Guide to Python Libraries
building-python-communities	CONTRIBUTING.md, issue templates, PR templates, GitHub automation	Building Engaging Community, Inner Source Introduction, From Silos to Shared Libraries
reviewing-python-libraries	Comprehensive library reviews across all quality dimensions	Guide to Python Libraries

Plugin Bundles

python-library-complete

All 12 skills for comprehensive Python library development.

python-library-foundations

Core skills for starting projects:

•Project setup
•Code quality
•Testing strategy

python-library-distribution

Skills for packaging and releasing:

•Packaging
•Release management
•CLI development

python-library-quality

Quality-focused skills:

•Security audit
•Performance
•API design

Usage

Once installed, Claude will automatically use these skills when you ask about:

•Setting up a new Python library
•Adding tests to your project
•Publishing to PyPI
•Reviewing code quality
•Security scanning
•Writing documentation
•And more...

Contributing

Contributions are welcome! Please open an issue or PR on GitHub.

License

MIT License - see LICENSE for details.

Install & Usage

Create the skills directory

mkdir -p .claude/skills

Download the skill file

mkdir -p .claude/skills && curl -o .claude/skills/python-library-quality.md https://raw.githubusercontent.com/wdm0006/python-skills/main/SKILL.md

Invoke in Claude Code

/python-library-quality

View source on GitHub

securityapidesignpython

Frequently Asked Questions

What is python-library-quality?

Quality-focused skills - security, performance, and API design

How to install python-library-quality?

To install python-library-quality, create the .claude/skills directory in your project, then run the curl command to download the skill file. Once installed, invoke it in Claude Code with /python-library-quality.

What is python-library-quality best for?

python-library-quality is a community categorized under General. It is designed for: security, api, design, python. Created by Will McGinnis.