Hook Development

Building Claude Code hooks requires YAML frontmatter with a name and description, supporting event types like PreToolUse, PostToolUse, Stop, and SessionStart. You can implement validation, logging, and safety checks using either prompt-based or command hook formats.

Claude Code hook automation supports PreToolUse, PostToolUse, Stop, SessionStart, SubagentStop, UserPromptSubmit, and notification events. These event-driven hooks enable validation, logging, and safety checks across plugin development, testing, and deployment scenarios.

Claude Code hooks are configured using hooks.json or settings.json files with defined prompt and command formats. Testing involves following templates, loading Claude Code to verify event triggers, and debugging timeout handling alongside parallel execution considerations.

Claude Code supports both prompt-based and command hook formats within the same plugin. Enforcing prompt and command hook formats requires handling timeout constraints and parallel execution considerations to ensure reliable event-driven automation.

Securing and debugging Claude Code hooks involves following best practices for security, testing, debugging, and tracing. Implement safety checks across development and deployment scenarios while managing timeout handling and parallel execution considerations.

Claude Code hooks timing out during parallel execution indicates unmanaged timeout handling considerations. Ensure your event-driven hooks enforce proper prompt and command formats, and verify configuration in hooks.json or settings.json to resolve execution bottlenecks.