Claude Code hooks and how Sonar Vortex verifies AI code inside the loop

Claude Code hooks are deterministic commands triggered at fixed points in an AI agent’s workflow, such as before tool use, after file edits, or at session start, and can use JSON input, exit codes, and structured output to allow, deny, or contextualize agent actions. The text contrasts hooks with prompt-based safeguards, arguing that hooks can block risky commands such as broad recursive deletions and can verify code changes immediately after they are made. It presents Sonar Vortex as an implementation of this pattern, using SonarQube context and agentic analysis through PostToolUse hooks to identify code-quality, security, and architectural issues, with faster single-file standard analysis and deeper cross-file analysis for change sets. Setup options include an official Claude Code plugin, direct CLI integration, or an MCP server, alongside secrets-detection hooks and project-context tools. The account also emphasizes that hooks themselves create security risks because repository-provided configurations can execute commands, citing patched vulnerabilities involving malicious project hooks, and recommends reviewing hook configurations, keeping tools updated, version-controlling hook code, and combining hooks with isolation measures such as sandboxes, containers, or git worktrees.

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