I read every Claude Code hook so you don't have to (codeaholicguy.com)

A recent deep dive into Claude Code hooks reveals insights into its 27 hook events, highlighting their potential impact on how users interact with the tool. While many hooks may not be particularly useful, a few stand out as game-changers for developers. Notably, the PreToolUse hook allows users to enforce rules on tool calls, enabling advanced capabilities like input rewriting to enhance security—such as stripping sensitive data from commands or blocking specific operations based on context. This shift emphasizes the ability to define policies directly in code, minimizing reliance on the model’s memory. The blog post also discusses various hooks like UserPromptSubmit and PostToolUse, each designed to inject context or modify inputs dynamically during interaction. This flexibility fosters a more robust and controlled user experience, especially in compliance-heavy scenarios. With practical examples illustrating the application of these hooks, the article serves as an important resource for AI/ML practitioners looking to optimize their workflows in Claude Code, ultimately enhancing functionality while maintaining safety and efficiency.