skills.rest
CANTAGESTUDIO
CANTAGESTUDIOCOMMUNITY
Explore all skills by this author →
GitHub

hook-development

Create event-driven Claude Code hooks for automated tool calls and notifications.

3|Updated Dec 22, 2025
Search Tags:#automation#hooks#Claude Code#events
One-click install
npx skills add https://github.com/CANTAGESTUDIO/CosmicAtlasPacker --skill hook-development-cantagestudio
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: hook-development
Source: https://github.com/CANTAGESTUDIO/CosmicAtlasPacker/tree/main/.claude/skills/hook-development
Command: npx skills add https://github.com/CANTAGESTUDIO/CosmicAtlasPacker --skill hook-development-cantagestudio

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Guides building and debugging Claude Code hooks to automate workflows like linting, formatting, or validations.

Core Features & Use Cases

  • Hook Types: Prompt-based and command hooks.
  • Events: PreToolUse, PostToolUse, SessionStart, Notification, etc.
  • Best Practices: Portability via CLAUDE_PLUGIN_ROOT, input validation, timeout handling.

Quick Start

Define a hook workflow for a specified Claude Code event and implement the actions.

Frequently Asked Questions about hook-development

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

FAQPage Schema
How do I automate tool calls and notifications in Claude Code?▼

Automate tool calls and notifications by creating event-driven hooks in Claude Code. Define hooks for events like PreToolUse, PostToolUse, SessionStart, and SessionEnd to validate operations, log activity, and integrate external tools without manual intervention.

What Claude Code events can I hook into for automation?▼

Claude Code supports nine hookable events: PreToolUse, PostToolUse, SessionStart, SessionEnd, UserPromptSubmit, PreCompact, Notification, Stop, and SubagentStop. Each event fires at specific workflow moments, enabling validation, logging, policy enforcement, and external tool integration.

How do I build a command hook versus a prompt-based hook?▼

Claude Code supports both Prompt-Based and Command Hooks. Prompt-based hooks use natural language definitions, while command hooks execute scripts. Both access environment variables like CLAUDE_PROJECT_DIR and CLAUDE_PLUGIN_ROOT for portability and context loading.

Can I use hooks to enforce policies and validate operations?▼

Yes, hooks enable policy enforcement and input validation across Claude Code workflows. PreToolUse hooks validate tool parameters before execution; SessionStart hooks load context; and custom hooks integrate external compliance or logging systems.

What environment variables and best practices do I need for hook portability?▼

Use CLAUDE_PROJECT_DIR, CLAUDE_PLUGIN_ROOT, and CLAUDE_ENV_FILE for portability. Follow best practices including input validation, timeout handling, and clear error messaging to ensure hooks work reliably across environments and plugin contexts.

Related Skills

Explore More Software Engineering Skills→
hamzaPixlhamzaPixl
2

hook-development

Validate and automate Claude Code plugin hook events with prompt and command hooks.

Community
Advanced
tldrawtldraw
49.7k

write-e2e-tests

Author Playwright-based end-to-end tests for tldraw UI interactions.

Official
Intermediate
rafazshrafazsh

Hook Development

Create Claude Code plugin hooks for event-driven validation and workflow controls.

Community
Advanced
Leap0920Leap0920
1

hook-development

Build event-driven Claude Code plugin hooks that validate tool usage.

Community
Advanced