PreToolUse
01Hook Claude Code
One of 8 in hooks.json
Runs before the agent uses a tool for Write, Edit, MultiEdit, Write, Edit, MultiEdit, Bash, Write, Edit, Write, Bash, Write, Edit, MultiEdit, Write, Edit, MultiEdit, Edit, Write, MultiEdit, Bash, Write, Edit and MultiEdit tool calls, executing utils.js via node (12 commands). From Fmarzochi/EGC.