What are Claude Hooks used for?

Claude Hooks allow you to execute custom scripts or logic at specific moments in the Claude Code lifecycle, such as before a tool is used, after a command finishes, or when a session begins.

Do I need to restart Claude to apply hook changes?

Yes, because hooks are snapshotted at the start of a session, any new hooks or configuration changes in settings.json require starting a new Claude Code session to take effect.

How do I ensure my hooks are working correctly?

The skill supports a two-phase testing workflow: development testing using piped JSON to verify logic, and integration testing where you perform real actions in a new Claude session.

What is the difference between a Rule and a Warning hook?

A Rule (.rule.ts) is typically a blocking enforcement used before a tool runs, while a Warning (.warn.ts) is a post-execution notification used to flag bad practices without stopping the workflow.

Can I block specific actions using hooks?

Yes, by using the .rule.ts classification with PreToolUse events, you can create hooks that automatically deny, allow, or ask for user confirmation based on custom logic.

Claude Code Lifecycle Hooks

Name: Claude Code Lifecycle Hooks
Author: constellos

byconstellos

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Herramientas para Desarrolladores

Manages custom lifecycle hooks for Claude Code to automate workflows, enforce rules, and provide real-time guidance.

Acerca de

Claude Code Lifecycle Hooks provides a comprehensive framework for extending Claude's behavior during critical stages of the AI development process. By utilizing TypeScript-based hooks, developers can implement deterministic execution rules, validation logic, and automated guidance triggered by events like tool usage, session starts, or prompt submissions. This skill allows for a governed coding environment where you can block dangerous commands with rules, provide best-practice warnings, and ensure architectural consistency through automated format validation, all backed by robust type safety and integrated testing utilities.

Características Principales

3 GitHub stars
Specialized format hooks for automated markdown and documentation structure validation
Three-tier classification system for blocking Rules, soft Warnings, and helpful Notes
Comprehensive event triggers including Pre/PostToolUse, SessionStart/End, and UserPromptSubmit
Integrated testing workflow featuring Vitest helpers and manual integration templates
Full TypeScript support with pre-defined types for system tools, MCP tools, and session transcripts

Casos de Uso

Automating repetitive setup tasks or environment checks at the beginning of every Claude session
Enforcing security policies by blocking or requesting permission for specific shell commands
Providing real-time architectural guidance and linting feedback after file modifications

Acerca de

Características Principales

3 GitHub stars
Specialized format hooks for automated markdown and documentation structure validation
Three-tier classification system for blocking Rules, soft Warnings, and helpful Notes
Comprehensive event triggers including Pre/PostToolUse, SessionStart/End, and UserPromptSubmit
Integrated testing workflow featuring Vitest helpers and manual integration templates
Full TypeScript support with pre-defined types for system tools, MCP tools, and session transcripts

Casos de Uso

Automating repetitive setup tasks or environment checks at the beginning of every Claude session
Enforcing security policies by blocking or requesting permission for specific shell commands
Providing real-time architectural guidance and linting feedback after file modifications