hook-development

To create Claude Code plugin hooks for event-driven automation, you configure scripts for specific events like PreToolUse or PostToolUse. You can use command hooks for deterministic tasks or prompt-based hooks for LLM-driven validation within your development workflow.

Prompt-based hooks utilize LLM-driven decision-making for complex validation logic, whereas command hooks execute deterministic tasks. Both hook types can be configured for events like SessionStart and Stop using plugin or settings formats to automate your workflow.

PreToolUse hooks validate file write operations by intercepting tool calls before execution. You configure matcher patterns to target specific file operations, then use hook output formats and environment variables to block sensitive files from being modified.

You configure Claude Code hook settings for the Stop event by defining hook configurations in either plugin or settings formats. This allows you to trigger automated processes or notifications when a session or task reaches its completion state.

Security best practices for Claude Code hooks involve validating inputs and restricting sensitive file access via PreToolUse matchers. Performance considerations require optimizing command hook execution times to prevent workflow latency during event-driven automation.

Claude Code hook development requires no external dependencies, relying on standard scripts and references. You need to understand hook configuration formats, environment variables, and debugging techniques to implement event-driven automation successfully in your environment.