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hook-development

Skill Official

This skill should be used when the user asks to "create a hook", "add a PreToolUse/PostToolUse/Stop hook", "validate tool use", "implement prompt-based hooks", "use ${CLAUDE_PLUGIN_ROOT}", "set up event-driven automation", "block dangerous commands", or mentions hook events (PreToolUse, PostToolUse,

32.8KCommunication

Install

git clone https://github.com/anthropics/claude-plugins-public.git ~/.claude/skills/hook-development

What is hook-development?

This skill should be used when the user asks to "create a hook", "add a PreToolUse/PostToolUse/Stop hook", "validate tool use", "implement prompt-based hooks", "use ${CLAUDE_PLUGIN_ROOT}", "set up event-driven automation", "block dangerous commands", or mentions hook events (PreToolUse, PostToolUse, Stop, SubagentStop, SessionStart, SessionEnd, UserPromptSubmit, PreCompact, Notification). Provides comprehensive guidance for creating and implementing Claude Code plugin hooks with focus on advanced prompt-based hooks API.

What this can do

Capabilities declared in this component's own frontmatter — not inferred.

Inherit all session tools

Declares no tool restrictions — inherits every session tool

~131 tokens of context used while enabled, before you invoke anything

Trust

94/100 · Excellent

1 factor scored below maximum

Documentation

README · ~9 min read

Hook Development for Claude Code Plugins

Overview

Hooks are event-driven automation scripts that execute in response to Claude Code events. Use hooks to validate operations, enforce policies, add context, and integrate external tools into workflows.

Key capabilities:

  • 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

Hook Types

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