Authoritative guide to Claude Code hooks — event-driven scripts that execute before or after tool calls, session events, file changes, and more. Use when writing a PreToolUse hook to block dangerous commands, a PostToolUse hook to auto-format after edits, a SessionStart hook to inject context, a Sto
Authoritative guide to Claude Code hooks — event-driven scripts that execute before or after tool calls, session events, file changes, and more. Use when writing a PreToolUse hook to block dangerous commands, a PostToolUse hook to auto-format after edits, a SessionStart hook to inject context, a Stop hook for session loops, a Notification hook for desktop alerts, a FileChanged hook for reactive en