What are Claude Code hooks?

Hooks are event-driven triggers that allow you to execute custom scripts or LLM evaluations during specific lifecycle events like PreToolUse, PostToolUse, and Stop.

Which programming languages can I use for hook scripts?

While this skill provides specific recipes for Python and Node.js, hooks can execute any command-line script or binary compatible with your environment.

Can I limit a hook to run only once?

Yes, for skills and slash commands, you can use the 'once: true' property in the frontmatter to ensure a hook only executes the first time its condition is met.

What is the difference between a command hook and a prompt hook?

Command hooks run local scripts for deterministic logic (like linting), while prompt hooks query an LLM to make context-aware decisions (like verifying task completion).

Claude Code Hooks Patterns & Recipes

Name: Claude Code Hooks Patterns & Recipes
Author: Jamie-BitFlight

byJamie-BitFlight

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Developer Tools

Provides standardized templates and code examples for implementing intelligent hooks, automation scripts, and event-based triggers in Claude Code.

This skill serves as a comprehensive reference library for developers extending Claude Code's capabilities through hooks. It offers production-ready patterns for plugin-integrated hooks, frontmatter configurations for agents, and advanced prompt-based LLM hooks for intelligent decision-making. By providing concrete examples in Python and Node.js, it simplifies the process of implementing security guardrails, automated formatting, and context-aware task validation, ensuring that custom workflows are both powerful and reliable.

Key Features

01Advanced prompt-based hook logic for intelligent task completion and validation

0226 GitHub stars

03Ready-to-use Python and Node.js recipes for common hook implementations

04Practical 'once' execution patterns for session-based initialization

05Detailed configuration patterns for Plugin, Skill, and Agent-level hooks

06Standardized security patterns for Bash command interception and filtering

Use Cases

01Building automated code quality checks that run immediately after file edits

02Creating intelligent 'Stop' hooks that verify all user requirements are met before closing

03Implementing security interceptors that validate shell commands against a whitelist

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jamie-bitflight/claude_skills hooks-patterns

For use in Claude.ai and ChatGPT

Download Skill