Week 9 of 12
Skills, Hooks & Custom Commands
Teaching Claude YOUR workflow
Objective
Deep dive into Claude Code's extensibility system.
Deliverable
At least 2 custom skills (one forked, one inline), 3 hooks (command, prompt, agent types), and 1 custom command.
Topics
- Skills: SKILL.md files for project patterns
- Skill frontmatter: name, description, allowed-tools, context, agent, model, hooks
- How skills auto-invoke based on context matching
- Custom slash commands via .claude/commands/
- Hooks: 14 events covering the full Claude Code lifecycle
- Three hook types: command, prompt, agent
- Hook decision control: exit codes, JSON decision patterns
- Async hooks for non-blocking background execution
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