How do I ensure my hooks are portable across environments?

Always use the ${CLAUDE_PLUGIN_ROOT} environment variable to reference script paths within your plugin directory for consistent execution.

What are Claude Code hooks?

Hooks are event-driven scripts that execute in response to specific Claude Code events, allowing for tool validation, context loading, and automated workflows.

Can I run multiple hooks simultaneously?

Yes, Claude Code executes all matching hooks in parallel to ensure performance, meaning they should be designed as independent operations.

Which hook should I use to validate a file write?

The PreToolUse hook is ideal for validating or modifying tool inputs like file writes before they are executed, allowing you to approve or deny the action.

What is the difference between prompt-based and command hooks?

Prompt-based hooks use LLM reasoning for context-aware validation, while command hooks execute bash scripts for deterministic checks and external integrations.

Hook Development for Claude Code

Name: Hook Development for Claude Code
Author: astrosteveo

byastrosteveo

Developer Tools

Guides the implementation of event-driven automation and validation hooks for Claude Code plugins.

About

This skill provides comprehensive technical guidance for developers building Claude Code plugins using the hooks API. It covers the full lifecycle of event-driven automation, including prompt-based validation, bash command integration, and session management. By offering standardized patterns for PreToolUse, PostToolUse, and SessionStart events, it enables developers to enforce security policies, validate tool outputs, and automate complex workflows within the Claude Code environment. It is essential for creators looking to build robust, secure, and highly context-aware extensions for the Claude CLI.

Key Features

Performance optimization strategies for parallel hook execution
Security best practices for input validation and path safety
Environment variable management using ${CLAUDE_PLUGIN_ROOT}
Detailed implementation for PreToolUse, PostToolUse, and Stop events
Standardized patterns for Prompt-Based and Command-type hooks
0 GitHub stars

Use Cases

Implementing quality gates that validate tool results before finalizing tasks
Automating project context loading and environment setup during SessionStart
Enforcing security policies by blocking dangerous commands or path traversal

About

Key Features

Performance optimization strategies for parallel hook execution
Security best practices for input validation and path safety
Environment variable management using ${CLAUDE_PLUGIN_ROOT}
Detailed implementation for PreToolUse, PostToolUse, and Stop events
Standardized patterns for Prompt-Based and Command-type hooks
0 GitHub stars

Use Cases

Implementing quality gates that validate tool results before finalizing tasks
Automating project context loading and environment setup during SessionStart
Enforcing security policies by blocking dangerous commands or path traversal