Claude Code Hooks: How to Stop AI Agents From Breaking Your Code

An agent deleted someone's home folder. Again.

This story is becoming all too familiar: A coding agent runs rm -rf, a tilde expands to the wrong path, and twenty years of files are gone. The agent apologizes in flawless prose. The files do not come back. When it happens, experienced engineers reach for a hook, not a better prompt.

This article is a hands-on tour of how this process typically works. First we build hooks by hand in Claude Code. The event model, the exact JSON contract, and two working scripts you can drop into a repo today. Then we follow the same mechanism into production, because Sonar Vortex's agentic analysis isn't a different idea bolted onto your agent. It is this idea, a deterministic check wired into a fixed point in the agent's loop, applied to the thing that actually breaks the code the agent writes.

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