Hooks

Pre- and post-tool hooks — run custom shell commands in response to Claude Code events.

What You Will Learn

• What hooks are and when they fire (PreToolUse, PostToolUse)
• Configuring hooks in settings.json
• Use cases: auto-format on write, log tool calls, run tests on edit
• Writing hook scripts: shell commands and exit code semantics
• Security considerations: hooks have full shell access