claude-hooks

Hooks automate Claude Code workflows by executing custom logic at key points in tool execution. Configure PreToolUse hooks to validate tools before execution, PostToolUse hooks to log results, and Notification hooks to alert on specific events. Store configurations in ~/.claude/settings.json under the hooks key, keeping execution under 1 second and testing independently.

PreToolUse hooks run before tool execution to validate requests and enforce security controls. PostToolUse hooks run after execution to capture audit logs and trigger notifications. Both use precise matchers to target specific tools and handle errors gracefully without verbose output.

Define hooks in ~/.claude/settings.json under the hooks key with PreToolUse, PostToolUse, Notification, and Stop hook types. Each hook specifies matchers, actions, and error handling. Test configurations independently to ensure they run quickly and respond as expected before deploying.

Yes, hooks enable audit logging through PostToolUse hooks that capture tool execution results, and security controls through PreToolUse hooks that validate requests before execution. Combine with Notification hooks to alert on security events or policy violations in real time.

Hooks are designed to handle errors gracefully without blocking tool execution. Configure error handling in your hook definitions to log failures or trigger fallback actions. Keep hook execution under 1 second to avoid timeouts and test error paths independently.

Notification hooks trigger alerts based on tool execution events, workflow milestones, or security conditions. Use them to integrate with external systems, send alerts on policy violations, or coordinate multi-step automation. Configure precise matchers to target specific scenarios.