Claude Code: Hooks, Subagents, and Skills — Complete Guide

Claude Code is gaining three extension layers: hooks, subagents, and skills.

Hooks let teams script lifecycle events like PreToolUse and SessionStart to block commands or inject project context.

Subagents handle multi-step work in parallel, while skills package reusable prompt instructions for repeatable tasks.

Together, these features make Claude Code more controllable, scalable, and safer for AI-assisted development.