The creator demonstrates how to use Claude Code hooks to trigger custom Python scripts that play specific sounds, like cat meows, in response to various events, enhancing interaction and understanding of Claude’s behavior. They also highlight the practical potential of hooks for tasks like safety checks and code validation, encouraging viewers to explore and customize hooks in their workflows.
The video begins with the creator explaining their motivation for using Claude Code hooks to make Claude “meow,” fulfilling a personal wish for a cat despite allergies. They introduce hooks as a powerful feature in Claude Code that allows users to run custom commands triggered by various events such as pre-tool use, post-tool use, notifications, stops, and pre-compact actions. By assigning sounds to these events, users can better understand when and how these hooks are triggered, which can inspire more practical applications of hooks in their workflows.
The setup involves editing the settings.json file within a project to define hooks as a list of commands that run custom scripts, typically Python scripts. The creator prefers keeping the logic centralized in a single Python script rather than multiple scripts or passing command-line arguments, as it simplifies debugging and maintenance. They store their hook scripts in a dedicated hooks directory within their project, ensuring the configuration is version-controlled and consistent across different work environments.
The core of the implementation is a Python script that logs the JSON data received from Claude Code via standard input whenever a hook is triggered. This data includes session information, event names, tool names, and inputs, which helps the script decide which sound or action to execute. The creator demonstrates how this logging helps them understand Claude’s behavior, such as how often it updates to-do lists or runs bash commands, which informs how they assign specific sounds to different events.
To create the sound effects, the creator sourced audio clips from Epidemic Sound, including beeps, cat meows, and voice clips from donated voice actors. They experimented with random sound assignments but found it more effective to map specific sounds to particular events or commands, such as different sounds for committing code, running tests, or creating pull requests. This mapping enhances the feedback experience and deepens their understanding of Claude Code’s operations.
Finally, the creator reflects on the broader potential of hooks beyond fun sound effects. Hooks can be used to enforce safety checks, such as preventing dangerous bash commands, running linters, or ensuring test suites pass before pull requests. They encourage viewers to explore hooks creatively and share their own use cases. The full code and tutorial are available at hih high.ai/hooks, inviting the community to build on this foundation and discover new ways to leverage Claude Code hooks.