Claude Code Builder

Expert guidance for creating Claude Code subagents, skills, slash commands, plugins, and plugin marketplaces.

Automatic Activation

This skill automatically activates when:

• Creating or editing .claude/agents/*.md files
• Working with .claude/commands/*.md files
• Developing skills/*/SKILL.md files
• Configuring .claude-plugin/plugin.json or marketplace.json
• Working with files in .claude/ directories
• Users ask "How do I create a Claude Code skill?"
• Users ask "How do I make a slash command?"
• Users mention "building a plugin" or "creating an agent"
• Discussing Claude Code extensibility and customization

When NOT to Use This Skill