hook-development

To create Claude Code hooks, you design prompt-based or command-based definitions for events like PreToolUse, PostToolUse, or SessionStart. This process automates safety checks, context loading, and workflow enforcement by validating tool use before changes land.

You need PreToolUse or PostToolUse plugin hooks when automating safety checks and validating tool use. PreToolUse blocks dangerous commands or protects sensitive paths before execution, while PostToolUse handles event-driven responses and context loading after operations complete.

The best way to validate Claude Code hook configurations is using the included validator and linter to check JSON structure, script quality, and sample hook behavior. Sample input testing and JSON schema validation ensure reliable plugin deployment.

Yes, you can use command-based hooks to block dangerous Bash commands in Claude Code. A PreToolUse guard can approve harmless commands, ask for confirmation on risky ones, and deny destructive operations to enforce safety policies.

Yes, you need jq and timeout installed as dependencies to develop Claude Code plugin hooks. These tools support the command-based hook definitions, JSON schema validation, and script execution workflows required for reliable plugin deployment.

You should use portable CLAUDE_PLUGIN_ROOT paths in Claude Code hook scripts to ensure reliable plugin deployment across different environments. Portable paths prevent fragile ad hoc scripts and maintain consistent hook behavior during testing and maintenance workflows.