What's on this page

• Install
  • Claude Code plugin
• Usage

Agent skills

Cecil provides agent skills: instructions that AI coding agents (Claude Code, GitHub Copilot, Cursor, etc.) load to work with Cecil the right way, following its conventions.

Skill	Use it to
cecil	Create, configure, build and deploy a site: content, front matter, templates, assets, configuration, etc.
cecil-theme	Create, structure and package a theme (visual theme or component theme) for Composer.

Install

Install the skills in your project with npx skills, which detects your coding agents and adds the skills where they expect them:

npx skills add cecilapp/cecil

Claude Code plugin

With Claude Code, you can also install the skills as a plugin, from the Cecil marketplace:

/plugin marketplace add Cecilapp/claude-plugins
/plugin install cecil@cecil

The plugin fetches only the skills from the Cecil repository and keeps them up to date. They are then also available as /cecil:cecil and /cecil:cecil-theme.

Usage

Once installed, ask your agent to create, build, configure or deploy a Cecil site, or to create a theme: it uses the matching skill automatically.

Examples of prompts:

• “Create a Cecil blog with an English and a French version.”
• “Add a projects section with a list of cards on the homepage.”
• “Turn the layouts of this site into a reusable Cecil theme.”