Understanding Claude Code Hooks

This article explores the concept and necessity of Hooks, which automatically execute tasks at specific event points by integrating with the lifecycle of Claude Code.

General prompts and CLAUDE.md-based rules rely on the model’s judgment or memory, which means they have a probabilistic limitation: the AI may occasionally ignore certain rules.

To address this limitation, we examine hooks as a tool for deterministic control, allowing teams to define rules that the AI must execute.

For example, hooks can be used to run a build check before a commit, automatically execute tests, or validate code formatting whenever a specific event occurs.