Hook Development

Implement Claude Code plugin hooks for event-driven automation and validation.

Updated Feb 18, 2026

Search Tags:#automation #validation #claude code #hooks #plugin development #event-driven

Ready to run

npx skills add https://github.com/zach-source/claude-plugins --skill hook-development-zach-source

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: Hook Development
Source: https://github.com/zach-source/claude-plugins/tree/main/plugins/plugin-dev/skills/hook-development
Command: npx skills add https://github.com/zach-source/claude-plugins --skill hook-development-zach-source

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill provides comprehensive guidance for creating and implementing Claude Code plugin hooks, enabling advanced event-driven automation and robust validation within your AI workflows.

Core Features & Use Cases

Event-Driven Automation: Implement hooks for various events like PreToolUse, PostToolUse, Stop, SessionStart, etc.
Prompt-Based Hooks: Leverage LLM reasoning for context-aware validation and decision-making.
Command Hooks: Execute deterministic bash scripts for specific tasks.
Security Best Practices: Learn how to validate inputs, ensure path safety, and prevent prompt injection.
Use Case: Automatically validate that all tests are run before an agent stops, or ensure that sensitive files are not modified by implementing PreToolUse hooks.

Quick Start

Use the hook development skill to create a PreToolUse hook that validates file write safety.

Frequently Asked Questions about Hook Development

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

FAQPage Schema

What are Claude Code hooks and how do they enable event-driven automation?▼

Claude Code hooks are event-driven triggers that execute custom automation during workflow events like PreToolUse or SessionStart, allowing you to run prompt-based reasoning or deterministic bash scripts to validate and control AI actions.

How do I create a PreToolUse hook to validate file write safety?▼

To create a PreToolUse hook for file write safety, configure a command hook or prompt-based hook that intercepts write actions, validates file paths against security rules, and blocks execution if sensitive files are targeted.

What is the difference between prompt-based hooks and command hooks for plugin development?▼

Command hooks execute deterministic bash scripts for specific tasks, providing consistent results, while prompt-based hooks leverage LLM reasoning to perform context-aware validation and make dynamic decisions within your automation workflow.

Can I use Claude Code hooks to ensure tests are run before an agent stops?▼

Yes, you can implement a Stop hook to ensure tests are run before an agent stops. This event-driven automation triggers when the session ends, executing validation scripts to verify all required test suites have completed successfully.

How do I prevent prompt injection and ensure path safety when configuring hooks?▼

Prevent prompt injection and ensure path safety by implementing security best practices in your hook configuration, validating all inputs strictly, sanitizing environment variables, and enforcing deterministic path checks before executing commands.

What are the limitations of using bash command hooks for workflow validation?▼

Bash command hooks provide deterministic execution but lack context-aware reasoning, meaning they cannot evaluate complex semantic inputs like prompt-based hooks, requiring explicit environment variable parsing and strict input output format handling.