Plugin Structure Skill

Comprehensive guidance on Claude Code plugin architecture, directory layout, and best practices.

Overview

This skill provides detailed knowledge about:

• Plugin directory structure and organization
• plugin.json manifest configuration
• Component organization (commands, agents, skills, hooks)
• Auto-discovery mechanisms
• Portable path references with ${CLAUDE_PLUGIN_ROOT}
• File naming conventions

Skill Structure

SKILL.md (1,619 words)

Core skill content covering:

• Directory structure overview
• Plugin manifest (plugin.json) fields
• Component organization patterns
• ${CLAUDE_PLUGIN_ROOT} usage
• File naming conventions
• Auto-discovery mechanism
• Best practices
• Common patterns
• Troubleshooting

References

Detailed documentation for deep dives:

• manifest-reference.md: Complete plugin.json field reference

  • All field descriptions and examples
  • Path resolution rules
  • Validation guidelines
  • Minimal vs. complete manifest examples

• component-patterns.md: Advanced organization patterns

  • Component lifecycle (discovery, activation)
  • Command organization patterns
  • Agent organization patterns
  • Skill organization patterns
  • Hook organization patterns
  • Script organization patterns
  • Cross-component patterns
  • Best practices for scalability

Examples

Three complete plugin examples:

• minimal-plugin.md: Simplest possible plugin

  • Single command
  • Minimal manifest
  • When to use this pattern

• standard-plugin.md: Well-structured production plugin

  • Multiple components (commands, agents, skills, hooks)
  • Complete manifest with metadata
  • Rich skill structure
  • Integration between components

• advanced-plugin.md: Enterprise-grade plugin

  • Multi-level organization
  • MCP server integration
  • Shared libraries
  • Configuration management
  • Security automation
  • Monitoring integration

When This Skill Triggers

Claude Code activates this skill when users:

• Ask to "create a plugin" or "scaffold a plugin"
• Need to "understand plugin structure"
• Want to "organize plugin components"
• Need to "set up plugin.json"
• Ask about "${CLAUDE_PLUGIN_ROOT}" usage
• Want to "add commands/agents/skills/hooks"
• Need "configure auto-discovery" help
• Ask about plugin architecture or best practices

Progressive Disclosure

The skill uses progressive disclosure to manage context:

1. SKILL.md (~1600 words): Core concepts and workflows
2. References (~6000 words): Detailed field references and patterns
3. Examples (~8000 words): Complete working examples

Claude loads references and examples only as needed based on the task.

Related Skills

This skill works well with:

• hook-development: For creating plugin hooks
• mcp-integration: For integrating MCP servers (when available)
• marketplace-publishing: For publishing plugins (when available)

Maintenance

To update this skill:

1. Keep SKILL.md lean and focused on core concepts
2. Move detailed information to references/
3. Add new examples/ for common patterns
4. Update version in SKILL.md frontmatter
5. Ensure all documentation uses imperative/infinitive form