Three Extensibility Layers: Master Hooks, Subagents, and Skills in Claude Code

This guide reveals how to transform Claude Code from a conversational tool into a deterministic, programmable AI engineering platform. Hooks enforce system-level rules before execution, subagents enable parallel task delegation, and skills provide reusable prompt templates—collectively shifting control from model interpretation to explicit, auditable automation. Teams can now block dangerous operations, inject context automatically, and orchestrate complex AI workflows without relying on prompt-based safeguards.