Hook Development

Claude Code hooks automate workflows by attaching event-driven scripts to PreToolUse, PostToolUse, SessionStart, and Stop events, enabling validation, policy enforcement, and task automation.

A PreToolUse hook in Claude Code intercepts tool execution before it happens, allowing you to validate inputs, enforce security policies, and ensure conditions like required unit tests are met before proceeding.

Yes, you can validate code changes and enforce policies using prompt-based and command hooks, such as ensuring all file write operations include accompanying unit tests before allowing the agent to stop.

Debug Claude Code hooks by examining environment variables, input/output formats, and event handling logic for hook events, utilizing provided debugging techniques to trace execution and identify failures.

Claude Code hook development requires following security best practices for environment variables and event handling, alongside performance considerations to ensure hooks execute efficiently without blocking workflows.

No external dependencies are required to implement Claude Code hooks. The skill provides comprehensive guidance on configuration formats, hook types, and event handling using standard prompt-based and command approaches.