The Guide
Claude Skills
What Claude skills are, how to install them, and the open-source library of 49 marketing Claude skills for Claude Code, Cursor, and Codex.
What are Claude skills?
Claude skills (also called agent skills) are modular, file-based capabilities you install into an AI agent to make it an expert at a specific task. Each skill is a folder with a SKILL.md instruction file plus references and examples. The agent loads a skill only when the task calls for it — so you add deep expertise without bloating every prompt.
How Claude skills work
- Each skill is plain files — a SKILL.md playbook plus reference docs and examples — versioned in a Git repo.
- Skills load on demand. The agent pulls one in only when your request matches it, keeping context lean (progressive disclosure).
- The format is portable. The same skill runs in Claude Code, Cursor, Codex, and other compatible agents — the expertise travels with the file.
- They're composable. Install a whole library at once and the agent picks the right skill per task.
How to install Claude skills
- 1Open your project in an AI agentClaude Code, Cursor, Codex, or any tool that supports the skills format.
- 2Run the install commandnpx skills add coreyhaines31/marketingskills adds the library to your project.
- 3Ask your agent to do the workThe right skill loads automatically when you ask for a related task — no prompt engineering required.
The best marketing Claude skills
This is an open-source library of 49 marketing Claude skills — each a focused playbook with references and examples. A few of the most-used:
Claude skills FAQ
What are Claude skills?
Claude skills (also called agent skills) are modular, file-based capabilities you install into an AI agent to make it an expert at a specific task. Each skill is a folder with a SKILL.md instruction file plus supporting references and examples. The agent loads a skill only when the task calls for it, so you can add deep expertise without bloating every prompt.
How do I install Claude skills?
The fastest way is the skills CLI. Run `npx skills add <github-repo>` in your project — for this marketing library, `npx skills add coreyhaines31/marketingskills`. It installs the skills into your agent (Claude Code, Cursor, Codex, and other compatible tools), where they load on demand.
Are Claude skills free?
The format is open and file-based, and this marketing library is free and open source under the MIT license. You can read, fork, and self-host every skill on GitHub.
Where can I find Claude skills? Is there a marketplace?
Skills are distributed as public GitHub repositories and indexed by community lists (often called 'awesome Claude skills') and skill directories. This site is a focused library of marketing Claude skills; browse all 49 on the skills page or install the whole set with one command.
Do Claude skills work in Cursor and Codex?
Yes. Skills are a portable, file-based format, so the same skill works across Claude Code, Cursor, Codex, and other agents that support the skills format — the expertise travels with the file.
What's the difference between Claude skills and MCP?
They solve different problems. MCP (Model Context Protocol) connects an agent to external tools and data sources. A skill packages expert instructions and know-how for a task. You often use both: MCP gives the agent access, skills teach it how to do the work well.
Install the marketing library
49 marketing Claude skills, free and open source. One command, works in Claude Code, Cursor, and Codex.