Configuring Claude Code Hooks System

Manage isolated Git worktrees for parallel SPEC development via a CLI.

1.2k|214|Updated Sep 16, 2025
One-click install
npx skills add https://github.com/modu-ai/moai-adk --skill configuring-claude-code-hooks-system
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: Configuring Claude Code Hooks System
Source: https://github.com/modu-ai/moai-adk/tree/main/.claude/skills/moai-cc-hooks
Command: npx skills add https://github.com/modu-ai/moai-adk --skill configuring-claude-code-hooks-system

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

Ensuring consistent code quality, security, and workflow adherence in an AI-driven development environment can be challenging. This Skill enables you to define automated "hooks" that trigger scripts based on Claude Code events, enforcing standards and automating repetitive tasks without interrupting your flow.

Core Features & Use Cases

  • Event-Driven Automation: Trigger scripts PreToolUse (e.g., command validation), PostToolUse (e.g., auto-formatting), or SessionStart (e.g., project summary).
  • Security Guardrails: Implement hooks to block dangerous commands or enforce permission preservation.
  • Context Seeding: Use SessionStart hooks to automatically load project context or display status cards.
  • Use Case: To prevent accidental rm -rf / commands, you can configure a PreToolUse hook that validates Bash commands and blocks dangerous patterns, ensuring a safer development environment.

Quick Start

Example: Configure a PreToolUse hook to validate Bash commands

(This is a JSON snippet for settings.json, not a command)

{ "hooks": { "PreToolUse": [ { "matcher": "Bash", "hooks": [ { "type": "command", "command": "bash ~/.claude/hooks/pre-bash-validator.sh" } ] } ] } }

Ensure ~/.claude/hooks/pre-bash-validator.sh is executable.

Frequently Asked Questions about Configuring Claude Code Hooks System

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

FAQPage Schema
How do I automate tasks in Claude Code using hooks?

Hooks in Claude Code trigger scripts based on events like PreToolUse, PostToolUse, and SessionStart. Configure them in settings.json to validate commands, auto-format code, or load project context without interrupting your workflow.

Can I block dangerous commands with Claude Code hooks?

Yes. Use PreToolUse hooks to validate Bash commands and enforce security patterns. For example, configure a hook to block dangerous patterns like `rm -rf /` before execution, protecting your development environment.

What events trigger hooks in Claude Code?

Claude Code supports three hook events: PreToolUse (before command execution), PostToolUse (after execution for formatting or logging), and SessionStart (at project initialization for context seeding or status displays).

How do I set up a PreToolUse hook to validate Bash commands?

Define a PreToolUse matcher for Bash in settings.json that runs an executable validation script. The script receives command input and can block or allow execution based on pattern matching rules you define.

Do Claude Code hooks require specific file permissions?

Yes. Hook scripts must be executable. Ensure your hook script files (e.g., ~/.claude/hooks/pre-bash-validator.sh) have execute permissions set before Claude Code runs them.

What's the difference between enforcing security guardrails and automating workflow tasks with hooks?

Security guardrails use PreToolUse hooks to block or validate dangerous operations before they run. Workflow automation uses PostToolUse or SessionStart hooks to format code, seed context, or trigger notifications after events complete.