SkillsforClaude — Expert SKILL.md Files for Claude AI
The ultimate open-source collection of expert SKILL.md files for Claude AI by Anthropic. Browse 500+ skills across 13 categories — code review, blog writing, legal drafts, SQL optimization, and more. Every skill is free, MIT licensed, and works with Claude Code CLI, Claude.ai, and the Anthropic API.
What is a SKILL.md file?
A SKILL.md file is a structured markdown document that gives Claude persistent expertise in a specific domain. Unlike one-time prompts, skills stay active across conversations and activate automatically when relevant. They follow a tested format with rules, examples, and anti-patterns for consistently better results.
How to install a Claude skill
- Create a skills directory:
mkdir -p ~/.claude/skills
- Browse skills at skillsforclaude.com/browse
- Download or copy any skill
- Place the SKILL.md file in
~/.claude/skills/skill-name/SKILL.md
Skill Categories
- Code & Engineering — Senior code review, refactoring, testing, debugging
- Frontend Development — React, Vue, CSS, accessibility, performance
- Backend & APIs — Node.js, Python, API design, microservices
- DevOps & Infrastructure — Docker, CI/CD, Kubernetes, monitoring
- Data & Analytics — SQL, ETL, dashboards, data modeling
- Design & UX — UI review, design systems, prototyping
- Writing & Content — Blog posts, documentation, copywriting
- Marketing & Growth — SEO, campaigns, social media, analytics
- Communication — Emails, presentations, meeting notes
- Business & Strategy — Planning, finance, pitch decks, OKRs
- Productivity & Ops — Automation, workflows, project management
- Legal & Compliance — Contracts, privacy, regulatory review
- Research & Analysis — Market research, competitive analysis, surveys
Guides
100% free. MIT licensed. No sign-up required. A Lycoris Labs product.