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Hook Development

Define event-driven hooks in hooks.json to govern Claude Code tool usage.

1|Updated Jan 26, 2026
Search Tags:#automation#security#validation#plugin#event-driven#claude-code#hook
One-click install
npx skills add https://github.com/JKKN-Institutions/jkkn-ahs-website --skill hook-development-jkkn-institutions
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Hook Development
Source: https://github.com/JKKN-Institutions/jkkn-ahs-website/tree/main/.claude/skills/hook-development
Command: npx skills add https://github.com/JKKN-Institutions/jkkn-ahs-website --skill hook-development-jkkn-institutions

SYSTEM DOCUMENTATION & REQUIREMENTS

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

What problem does it solve?

Hook Development provides structured, safe, and auditable integration points for Claude Code by enabling event-driven hooks that validate, augment, and govern tool usage.

Core Features & Use Cases

  • Supports PreToolUse and PostToolUse hooks to inspect and influence tool calls.
  • Offers Stop, SessionStart, UserPromptSubmit hooks for enforcement, context loading, and user interactions.
  • Includes a hook-linting and testing workflow to ensure reliability, security, and performance.

Quick Start

Define hooks in hooks.json and add a PreToolUse prompt to validate commands and a SessionStart script to load context.

Frequently Asked Questions about Hook Development

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

FAQPage Schema
How do I validate Claude Code tool usage automatically before execution?▼

You can validate Claude Code tool usage by defining PreToolUse hooks in a hooks.json file. These event-driven hooks inspect and influence tool calls, enforcing policies before execution begins.

What Claude Code hook events can I use to load context and automate workflows?▼

Claude Code supports PreToolUse, PostToolUse, Stop, SessionStart, and UserPromptSubmit hook events. These events enable context loading, user interaction enforcement, and workflow automation.

How do I create portable paths for Claude Code plugin hooks?▼

Use the ${CLAUDE_PLUGIN_ROOT} environment variable to define portable paths for Claude Code plugin hooks. This ensures hooks reference correct resources across different environments.

Can I use scripts to lint and test Claude Code hooks for security?▼

Yes, Hook Development includes a hook-linting and testing workflow to ensure reliability, security, and performance for Claude Code scripts and prompt hooks.

How does structured JSON output work for Claude Code hook processing?▼

Claude Code hooks output structured JSON for downstream processing. This allows event-driven hooks to validate, augment, and govern tool usage with auditable integration points.

Does Claude Code support both command and prompt hooks for event-driven automation?▼

Yes, Claude Code supports both command and prompt hooks. You define these hook types in hooks.json to automate workflows and enforce policies across various hook events.

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