Claude Hook Writer

Claude Hook Writer Skill

Production-ready skill for writing secure, reliable, and performant Claude Code hooks.

Auto-Trigger Keywords

• Claude Code hooks
• hook writer
• PreToolUse hook
• PostToolUse hook
• UserPromptSubmit hook
• SessionStart hook
• hook security
• hook validation
• PRPM package
• bash hook
• hook configuration
• hook testing

When to Use

• Creating new Claude Code hooks
• Reviewing hook code for security issues
• Debugging hook failures
• Optimizing slow hooks
• Publishing hooks as PRPM packages
• Understanding hook exit codes and behavior

Key Features

• Security Requirements: Input validation, path sanitization, sensitive file protection
• Reliability Patterns: Handle missing dependencies, set timeouts, log properly
• Performance Guidelines: Keep hooks fast, use specific matchers, dedupe operations
• Code Templates: Format on save, block sensitive files, command logger, security hooks
• Testing Strategies: Manual testing, edge cases, integration testing
• PRPM Publishing: Package structure, configuration, advanced options

Common Pitfalls Covered

• Not quoting variables (breaks on spaces)
• Trusting input without validation
• Blocking operations too long
• Using wrong exit codes
• Logging to stdout instead of stderr
• Assuming tools exist

Source

Adapted from PRPM claude-hook-writer

License

MIT