#AI agent reliability

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A rack-mounted event-relay panel with rows of channel relays, one armature caught mid-throw and its patch lead not yet seated in its bulkhead port

What a Claude Code Hook Actually Does, and Why That Matters

A hook is not a stronger instruction to the model — it is a shell command the harness runs whether or not Claude agrees. That mechanical fact is what makes hooks solve real engineering problems, and exactly what makes them a documented attack surface.

By Brecht Corbeel · August 23, 2026 · 19 min read

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