Hook Development
Guides the development of event-driven automation scripts (hooks) to extend and secure Claude Code plugin workflows.
Key features
- Explains hook configuration formats for both plugins and user settings
- Details environment variables like ${CLAUDE_PLUGIN_ROOT} for building portable scripts
- Implements event-driven automation using hooks (PreToolUse, PostToolUse, SessionStart, etc.)
- Provides security best practices for writing safe hooks, including input validation and path safety
- Guides creation of both command-based and advanced prompt-based hooks for context-aware validation
Use cases
- Automating project setup by loading context or environment variables when a new session starts.
- Validating tool usage before execution, such as blocking dangerous file writes or shell commands.
- Enforcing task completion criteria or coding standards before allowing Claude to finish a task.
FAQ
How does this skill improve my workflow?
It enhances security by preventing risky operations, boosts productivity by automating setup and validation tasks, and improves the reliability of Claude's work by enforcing your project's specific standards and completion criteria.
What's a key best practice this skill teaches for portability?
The skill emphasizes using the `${CLAUDE_PLUGIN_ROOT}` environment variable within your command hooks. This ensures your scripts can locate necessary files relative to the plugin's installation directory, making your hooks portable and shareable.
What does the Hook Development skill do?
This skill guides you in creating 'hooks,' which are automated scripts that run in response to specific events in Claude Code. You can use them to validate tool usage, enforce security policies, add context to sessions, and integrate external tools into your workflow.
When should I use this skill?
Use this skill whenever you need to add custom logic or security layers to your AI-assisted development. Common use cases include blocking dangerous commands (like `rm -rf`), validating file writes, ensuring tests pass before Claude finishes a task, or automatically loading project settings when a new session starts.
What are the main types of hooks I can create?
There are two primary types: 1) **Prompt-based hooks**, which use Claude's own intelligence to make flexible, context-aware decisions based on natural language rules, and 2) **Command-based hooks**, which execute shell scripts for fast, deterministic checks and integrations.
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