hook

Create, update, configure, and validate Claude Code hooks for events.

1|Updated Nov 26, 2025
One-click install
npx skills add https://github.com/Emz1998/nexly-notes --skill hook
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: hook
Source: https://github.com/Emz1998/nexly-notes/tree/main/.claude/skills copy/hook
Command: npx skills add https://github.com/Emz1998/nexly-notes --skill hook

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill simplifies the complex process of creating, updating, configuring, and validating Claude Code hooks. It provides a structured workflow to ensure hooks are correctly implemented, linked, and secure, automating event-driven actions and integrations within your development environment.

Core Features & Use Cases

  • Structured Hook Management: Guides through discovery, implementation, configuration, and validation phases for Claude hooks.
  • Security & Best Practices: Emphasizes input validation, error handling, and secure coding for hooks.
  • Integration with Settings: Ensures hooks are properly linked in settings.local.json and triggered by appropriate events.
  • Use Case: When a new requirement arises to automatically format code after a Write tool use, this skill guides the creation of a PostToolUse hook, ensuring it's correctly configured and tested.

Quick Start

Create a new Claude Code hook named post-write-formatter that runs a format.sh script after any Write tool use.

Frequently Asked Questions about hook

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I create and configure Claude Code hooks for automation?

Claude Code hooks automate event-driven actions by creating scripts in .claude/hooks and linking them in settings.local.json. The hook skill guides you through discovery, implementation, configuration, and validation phases to ensure hooks trigger correctly on events like PostToolUse or UserPromptSubmit.

What security constraints should I follow when setting up hooks?

Hooks must avoid hardcoded credentials, never modify critical system files, and include input validation and error handling. The skill enforces these security constraints during creation and validation to protect your development environment.

Can I use Python or Bash scripts for Claude Code hooks?

Yes, hooks support idempotent scripting in both Python and Bash. The skill validates and manages both script types while ensuring robust error handling and logging across your hook implementations.

How do I validate that my hooks are correctly linked and functional?

The skill performs validation workflows that check hook configuration, verify linkage in settings.local.json, and test compatibility with plugin hook configurations. This ensures your hooks execute reliably on their assigned events.

When should I use event-driven hooks instead of manual scripting?

Use hooks when you need automated actions triggered by Claude Code events—such as formatting code after a Write tool use or running security checks. Hooks eliminate manual steps and ensure consistent, repeatable integrations.