# Claude Code Hooks: Ensuring Change is Shippable

An agent saying "done" is not the same as a change being shippable. Claude Code hooks give you a deterministic layer around the agent loop: run checks after edits, and block final completion when the repository is not green.

This article shows a practical pattern using PostToolUse and [explains the concept further](/content/blog/claude-code-hooks-done-means-tests-passed/index.html).