Writing Hookify Rules

About

Leverage this skill to create and manage Hookify rules, which are powerful, repository-specific guardrails for Claude. These rules, defined in simple markdown files with YAML frontmatter, allow you to monitor shell commands and file edits for specific patterns. You can use them to automatically warn against common mistakes, block dangerous operations like `rm -rf`, enforce coding standards like preventing `console.log` in production code, or provide project-specific checklists before completion. This skill provides comprehensive guidance on rule syntax, from simple regex patterns to complex multi-condition logic, enabling you to codify your team's best practices directly into the development workflow.

Key Features

• Guidance on YAML frontmatter and markdown structure for rule creation.
• 46,250 GitHub stars
• Instructions for targeting events like shell commands, file edits, and agent completion.
• Support for defining trigger conditions using simple regex or complex multi-field logic.
• Best practices for writing effective rule messages, regex patterns, and file organization.
• Control over rule actions to either warn developers or block operations.

Use Cases

• Enforcing project-specific coding standards, such as flagging the use of `console.log`.
• Preventing dangerous or destructive shell commands like `rm -rf` or `chmod 777`.
• Creating pre-completion checklists to ensure tests are run and documentation is updated.