Writing Hookify Rules

Hookify rules use regex patterns in YAML frontmatter to monitor bash commands. Define a pattern matching `rm -rf` or similar destructive operations, set the event type to capture command execution, and specify a warning message that displays when Claude attempts the matched pattern.

Yes. Write a rule with a regex pattern targeting `console.log` in TypeScript or JavaScript files, set the event to file edits, add conditions filtering for production paths, and trigger a reminder message when the pattern matches during code modifications.

Hookify rules are Markdown files with YAML frontmatter containing name, enabled status, event type, regex pattern, optional conditions for multi-condition logic, and a message body. The frontmatter specifies what to watch; the message tells Claude what to do when a rule triggers.

Multi-condition rules combine multiple patterns or checks in the conditions field of the YAML frontmatter. All conditions must match for the rule to trigger, enabling precise targeting—for example, flagging file edits only in sensitive directories or specific file types.

Hookify rules monitor bash commands, file edits, and user prompts. Each rule specifies an event type in its frontmatter to determine what triggers pattern matching—allowing safety enforcement across command execution, code changes, and user interactions.

Basic regex knowledge helps but isn't required for simple patterns. Hookify rules use straightforward YAML syntax and plain-text regex; you can start with common patterns like exact strings or character classes and expand as needed for complex matching logic.