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Clay-HHK
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Hook Development

Define event-driven hooks for tool validation and workflow automation in Claude Code.

2|Updated Apr 12, 2026
Search Tags:#automation#security#validation#plugins#claude-code#hook
One-click install
npx skills add https://github.com/Clay-HHK/claude-config --skill hook-development-clay-hhk
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Hook Development
Source: https://github.com/Clay-HHK/claude-config/tree/main/skills/hook-development
Command: npx skills add https://github.com/Clay-HHK/claude-config --skill hook-development-clay-hhk

SYSTEM DOCUMENTATION & REQUIREMENTS

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

What problem does it solve?

Hooks provide event-driven automation to validate operations, enforce policies, and enrich Claude Code workflows by integrating external tools and context.

Core Features & Use Cases

  • Validate tool calls before execution (PreToolUse)
  • React to tool results (PostToolUse)
  • Enforce completion standards (Stop, SubagentStop)
  • Load project context (SessionStart)
  • Automate workflows across the development lifecycle

Quick Start

Create a plugin that defines PreToolUse and Stop hooks, wires up prompt or command hooks in hooks.json, and test using claude --debug.

Frequently Asked Questions about Hook Development

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

FAQPage Schema
How do I validate tool calls before execution in Claude Code?▼

You validate tool calls by defining PreToolUse hooks in a plugin, which intercepts operations and enforces security or policy validation before Claude Code executes the tool.

What are Claude Code hooks and how do they automate workflows?▼

Claude Code hooks are event-driven automation mechanisms that validate operations, enforce policies, and react to tool results across the development lifecycle without manual intervention.

How do I set up a plugin with PreToolUse and Stop hooks?▼

To set up hooks, create a plugin defining PreToolUse and Stop hooks, wire up prompt or command hooks in hooks.json with YAML frontmatter in SKILL.md, and test using claude --debug.

Can I load project context automatically when a Claude Code session starts?▼

Yes, SessionStart hooks automatically load project context when a Claude Code session initializes, enriching the workflow with necessary external data and environment context immediately.

How do I ensure parallel-safe hook execution with timeout controls?▼

Parallel-safe hook execution with timeout controls is achieved by following security best practices and architectural guidance provided in the Skill's references and scripts components.

Does Claude Code support post-tool reaction hooks for editing and running tools?▼

Yes, PostToolUse hooks support post-tool reaction across writing, editing, and running tools, allowing you to react to tool results and automate subsequent workflow actions.

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