writing-hookify-rulespor anthropic

Define patterns and messages that trigger contextual warnings or blocks during agent tool use. Rules are markdown files with YAML frontmatter stored in .claude/hookify.{rule-name}.local.md that match against bash commands, file edits, agent stops, or user prompts Supports simple regex patterns or advanced multi-condition rules with operators like regex_match, contains, equals, and starts_with Actions include warn (show message, allow operation) or block (prevent operation or stop session)...