Does this support automatic code formatting?

Absolutely. You can configure a PostToolUse hook to trigger tools like Prettier, Black, or ESLint immediately after Claude finishes editing a file.

How do I block a tool from running?

You can use a PreToolUse hook with a shell command that exits with code 2. This prevents the tool from executing and allows you to provide specific feedback to the Claude agent.

Where are hook configurations stored?

Hooks can be stored globally in ~/.claude/settings.json for all projects or locally within a project's .claude/settings.json file for repository-specific behavior.

What are Claude Code hooks?

Hooks are specialized scripts or prompts that trigger during specific lifecycle events, such as starting a session or before a tool is used, to customize or restrict agent behavior.

Can I use LLMs to evaluate hooks?

Yes, 'prompt' type hooks allow you to use natural language instructions and context to decide whether a tool should proceed or if a session should stop.

Hook Creator

Name: Hook Creator
Author: GzuPark

byGzuPark

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Developer Tools

Automates and customizes Claude Code behavior by creating shell-based or LLM-driven lifecycle hooks for tasks like formatting, security, and logging.

About

Hook Creator empowers developers to extend Claude Code's functionality by configuring hooks that execute during specific lifecycle events. Whether you need to auto-format code with Prettier after an edit, block access to sensitive files like .env, or log command history to external files, this skill provides a structured workflow for implementation. It supports both shell-based commands for performance and prompt-based LLM evaluations for complex decision-making, allowing for deep integration between Claude and your local development environment.

Key Features

Automated formatting and linting after file edits
Tool execution logging and session monitoring
1 GitHub stars
File protection and access control for sensitive data
Prompt-based hooks for LLM-driven event logic
Auto-approval workflows for permission requests

Use Cases

Creating comprehensive audit trails of all CLI commands executed by the AI agent.
Enforcing security policies by blocking edits to environment files or protected directories.
Streamlining developer workflows by automatically running tests or formatters after Claude modifies code.

About

Key Features

Automated formatting and linting after file edits
Tool execution logging and session monitoring
1 GitHub stars
File protection and access control for sensitive data
Prompt-based hooks for LLM-driven event logic
Auto-approval workflows for permission requests

Use Cases

Creating comprehensive audit trails of all CLI commands executed by the AI agent.
Enforcing security policies by blocking edits to environment files or protected directories.
Streamlining developer workflows by automatically running tests or formatters after Claude modifies code.