Claude Code introduces Hooks, a deterministic control layer for its probabilistic AI assistant. Hooks let developers define shell commands that run at specific workflow points, blocking dangerous actions like `rm -rf` or unauthorized database migrations. This addresses the core risk of AI coding tools: their guesswork is great until it isn't.

The feature targets a critical gap in AI-assisted development. While assistants accelerate coding, they lack inherent safety rails. Hooks act as a programmable intervention layer between "Claude wants to do this" and "Claude actually does this." Developers configure them via `.claude/settings.json` using lifecycle events like PreToolUse for validation and PostToolUse for logging.

A fintech use case demonstrates the value: PreToolUse hooks scan for production database commands and enforce code signing. PostToolUse hooks create audit trails for compliance. This transforms Claude from a powerful but unpredictable assistant into a controlled team member, letting developers balance AI speed with essential safety boundaries.