Can I use hooks to automatically format my code?

Yes, by using the PostToolUse event matched to 'Write' or 'Edit' tools, you can trigger formatters like Black, Prettier, or ESLint to run immediately after Claude modifies a file.

How do I prevent Claude from running dangerous commands?

You can implement a PreToolUse hook that uses a validation script to check bash commands. If a command is deemed dangerous, the script exits with code 2 to block the operation.

Do hooks work with Model Context Protocol (MCP) tools?

Yes, hooks fully support MCP tools using the naming convention 'mcp__ __ ', allowing you to monitor and control third-party tool integrations.

What are Claude Code Hooks?

Hooks are event-driven automation scripts that execute automatically during specific Claude Code operations, allowing you to validate inputs, automate workflows, or integrate external tools.

Where should I store my hook configurations?

Hooks can be stored in ~/.claude/settings.json for personal use across all projects, or in a project-specific .claude/settings.json file for team-wide workflows.

Claude Code Hooks

Name: Claude Code Hooks
Author: emdashcodes

byemdashcodes

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生産性とワークフロー

Automates development workflows and integrates external tools through event-driven scripts and configuration patterns within Claude Code.

概要

Claude Code Hooks provides a robust framework for implementing event-driven automation and policy enforcement within the Claude Code environment. By intercepting lifecycle events like tool usage, session starts, and prompt submissions, this skill enables developers to build sophisticated 'middleware' that validates security policies, enriches AI context with project-specific data, and automates repetitive tasks like linting and formatting. It effectively transforms Claude into a context-aware agent that adheres to organizational standards while streamlining the end-to-end development process.

主な機能

Standardized JSON interface for cross-language hook script implementation
Multi-event lifecycle triggers including PreToolUse, PostToolUse, and SessionStart
Decision control logic to block, allow, or require confirmation for actions
Context enrichment capabilities to inject external data directly into sessions
4 GitHub stars
Granular tool matching using regex patterns for precise automation control

ユースケース

Blocking dangerous shell operations and enforcing security guardrails via validation scripts
Automating code quality checks by running linters and formatters immediately after file edits
Integrating external CI/CD pipelines or logging systems to track AI-driven project changes

概要

主な機能

Standardized JSON interface for cross-language hook script implementation
Multi-event lifecycle triggers including PreToolUse, PostToolUse, and SessionStart
Decision control logic to block, allow, or require confirmation for actions
Context enrichment capabilities to inject external data directly into sessions
4 GitHub stars
Granular tool matching using regex patterns for precise automation control

ユースケース

Blocking dangerous shell operations and enforcing security guardrails via validation scripts
Automating code quality checks by running linters and formatters immediately after file edits
Integrating external CI/CD pipelines or logging systems to track AI-driven project changes