creating-hooks

Block dangerous file edits by creating rules with the /hookify command. Define file patterns using regex or text matching operators, set the action to block or warn, and Claude Code will prevent or alert on matching operations before they execute.

Hook rules use Markdown with YAML frontmatter. Specify the event type (file, bash, stop, or prompt), pattern operators (regex_match, contains, equals, starts_with, ends_with), and action (block or warn) to control how Claude Code handles detected operations.

Yes. Hook rules support bash events alongside file operations. Use pattern matching on command text to block or warn on specific bash commands, enabling enforcement of coding standards and prevention of unwanted shell execution.

Set the action field to warn in your hook rule instead of block. Warn actions alert you when a pattern matches without stopping the operation, allowing review of risky behaviors while maintaining workflow flexibility.

Hook rules monitor file edits, bash commands, stop events, prompts, and all events combined. This scope lets you enforce standards across file modifications, shell commands, workflow interruptions, and user input simultaneously.

Basic familiarity with regex and YAML syntax helps, but /hookify provides templates and guided rule creation. The Markdown format with pattern operators is designed for incremental learning as you define more complex rules.