# Agent Skills

> The open registry of agent skills (SKILL.md instruction files) for AI coding
> assistants — Claude Code, Codex, GitHub Copilot, Antigravity, Cursor, and other
> agents that support the Agent Skills open standard. Browse 9,000+ skills, see the
> real SKILL.md, and install any skill with one command. Free and open source.

## What an agent skill is

A skill is a markdown file (SKILL.md) with YAML frontmatter (name, description) plus
instructions that an AI coding agent loads automatically when relevant. Skills add
reusable workflows, framework conventions, and domain expertise without re-prompting.

## Key pages

- [All skills](https://agentskills.codes/skills): searchable directory of every skill
- [Categories](https://agentskills.codes/skills/categories): skills grouped by domain (Coding, Design, Research, Security, Writing, and more)
- [Leaderboard](https://agentskills.codes/skills/leaderboard): most-installed skills
- [For Claude Code](https://agentskills.codes/clients/claude-code): skills + install paths for Claude Code
- [For Codex](https://agentskills.codes/clients/codex): skills + install paths for OpenAI Codex
- [For Copilot](https://agentskills.codes/clients/copilot): skills + install paths for GitHub Copilot
- [For Antigravity](https://agentskills.codes/clients/antigravity): skills + install paths for Antigravity
- [Blog](https://agentskills.codes/blog): guides on installing, writing, and choosing skills

## Installing a skill

Each skill page provides a one-line install command per client. Skills install into a
client-specific directory (for example `.claude/skills/<name>` for Claude Code, project
or global scope). The directory is read automatically by the agent.

## Data

- Developer resources: https://agentskills.codes/developers — API, OpenAPI spec, Markdown access, conventions
- API: https://agentskills.codes/api/v1/skills — JSON search (params: q, sort, cat, limit, offset)
- OpenAPI: https://agentskills.codes/openapi.json — machine-readable API description
- Markdown: any skill page (https://agentskills.codes/skills/<slug>) or blog post (https://agentskills.codes/blog/<slug>) returns Markdown when requested with the header `Accept: text/markdown`, or by appending `.md` to the URL
- Errors: every failure under /api/ returns JSON (`{"error":{"code","message","hint","docs"}}`) — never an HTML error page
- Sitemap: https://agentskills.codes/sitemap.xml