AI Hooks for Claude Code, Cursor, and Codex: Block Secrets Before Agents Can Use Them
TL;DR Instructions are suggestions, not controls : Prompts, AGENTS.md, and CLAUDE.md files only guide an agent, which can reinterpret or route around them. Security needs deterministic controls that hold no matter how the agent reasons. Hooks enforce rules at the system level : AI hooks run deterministic checks before prompts reach the model, before tools execute, and after output returns,…
AI coding agents, like Claude Code, Cursor, and Codex, operate with a degree of unpredictability. They are designed to explore various paths and solutions to a given problem. However, this unpredictability can also lead to security issues. For instance, an agent might discover a privileged token or access a sensitive file that was not anticipated.
GitGuardian AI Hooks address this concern by implementing deterministic controls at the system level, allowing or blocking certain steps regardless of the agent's reasoning. These hooks run checks before prompts reach the model, before tools execute, and after output returns. By using GitGuardian AI Hooks, security teams can enforce rules that hold true irrespective of the agent's decision-making process.
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