This repository, "Claude Code Hooks Mastery," serves as a comprehensive demonstration and educational resource for mastering Claude Code hooks, a powerful feature within Anthropic's Claude Code CLI. Its primary purpose is to provide users with practical examples and in-depth understanding of how to leverage hooks to customize and control Claude Code's behavior, enhancing its functionality and security. The repository goes beyond basic hook implementation, exploring advanced concepts like sub-agents, team-based validation, and output styling.

The core functionality revolves around the 13 different hook lifecycle events within Claude Code. The repository meticulously captures and demonstrates each hook, showcasing their JSON payloads and providing examples of how to utilize them effectively. These hooks cover various stages of a conversation, from user prompt submission to tool execution, sub-agent lifecycles, and session management. The project provides a clear understanding of each hook's purpose, the data it receives, and how it can be used to modify Claude Code's actions.

A key feature is the demonstration of prompt validation and security enhancements. The repository includes examples of how to use the `UserPromptSubmit` hook to validate user prompts, inject context, and filter out potentially harmful commands. The `PreToolUse` hook is used to block dangerous commands, preventing actions like deleting files or accessing sensitive system resources. This focus on security is a crucial aspect of the repository, highlighting how hooks can be used to create a safer and more controlled environment for interacting with Claude Code.

Beyond security, the repository showcases the power of hooks in creating a more personalized and intelligent user experience. The inclusion of an intelligent Text-to-Speech (TTS) system, which provides audio feedback, is a prime example. The system prioritizes different TTS providers (ElevenLabs, OpenAI, pyttsx3), ensuring the best possible audio quality. The `Stop` hook is used to generate AI-generated completion messages with TTS playback, providing a polished and informative end-of-conversation experience.

The repository also introduces advanced concepts like Claude Code sub-agents, which allow for the creation of specialized agents within a larger workflow. The "Team-Based Validation System" is another notable feature, demonstrating how to orchestrate agents for code quality validation. This system utilizes a builder/validator agent pattern, where one agent implements code and another, read-only validator agent checks its quality.

The project utilizes UV single-file scripts architecture, which keeps hook logic separate from the main codebase. This approach ensures that hooks are portable, easy to understand, and maintainable. Each hook is a standalone Python script with its own dependencies, managed by UV, simplifying dependency management and promoting code isolation.

The repository includes a wealth of supporting materials, including comprehensive documentation, example configurations, and custom commands. The `logs/` directory contains JSON logs of all hook executions, allowing users to observe the hooks in action and understand their behavior. The `ai_docs/` directory provides detailed documentation on various aspects of the project, including hook lifecycles, custom slash commands, and sub-agents. The `output-styles/` directory offers a collection of response formatting configurations, allowing users to customize the output of Claude Code.

In essence, "Claude Code Hooks Mastery" is a valuable resource for anyone looking to go beyond the basic usage of Claude Code. It provides a practical, hands-on approach to mastering hooks, enabling users to build more secure, customized, and intelligent applications with Anthropic's powerful AI tool.