extension-authoring
- Skills - Modular capabilities in SKILL.md files that provide domain expertise
- Hooks - Event-driven automation that executes on tool use and session events
- Slash Commands - Reusable prompts triggered with
/command-namesyntax - Subagents - Specialized Claude instances for delegated tasks
All four extension types share core principles: pure XML structure, YAML frontmatter, and clear success criteria. This skill teaches you to create effective extensions following best practices.
- Skill - SKILL.md file for domain expertise
- Hook - Event-driven automation (PreToolUse, PostToolUse, Stop, etc.)
- Slash Command - Reusable prompt with
/command-name - Subagent - Specialized agent for delegated tasks
- Guidance - Help deciding which extension type to use
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