hook-authoring

Complete guide for writing Claude Code and SDK hooks with security-first design.Triggers: hook creation, hook writing, PreToolUse, PostToolUse, UserPromptSubmit,tool validation, logging hooks, context injection, workflow automationUse when: creating new hooks for tool validation, logging operations for audit,injecting context before prompts, enforcing project-specific workflows,preventing dangerous operations in productionDO NOT use when: logic belongs in core skill - use Skills instead.DO NOT use when: complex multi-step workflows needed - use Agents instead.DO NOT use when: behavior better suited for custom tool.Use this skill BEFORE writing any hook. Check even if unsure.