> ## Documentation Index > Fetch the complete documentation index at: https://praison.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # types • AI Agent SDK > Hook Types for PraisonAI Agents. # types AI Agent Hook Types for PraisonAI Agents. Defines the core types, enums, and dataclasses for the hook system. ## Import ```python theme={"theme":{"light":"vitesse-light","dark":"vitesse-dark"}} from praisonaiagents.hooks import types ``` ## Classes Event names for the hook system. Base hook input - common fields for all events. Base hook output - common fields for all events. Result from a hook execution. Hook definition with matcher and configuration. Hook that executes a shell command. Hook that executes a Python function. Result of executing a single hook.