> ## Documentation Index
> Fetch the complete documentation index at: https://docs.agno.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Hooks

> Examples for pre-hooks, post-hooks, tool hooks, and stream lifecycle hooks.

| Example                                                                                              | Description                                                                                                 |
| ---------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------- |
| [Post Hook Output](/examples/agents/hooks/post-hook-output)                                          | Example demonstrating output validation using post-hooks with Agno Agent.                                   |
| [Pre Hook Input](/examples/agents/hooks/pre-hook-input)                                              | Example demonstrating how to use a pre\_hook to perform comprehensive input validation for your Agno Agent. |
| [Session State Hooks](/examples/agents/hooks/session-state-hooks)                                    | Example demonstrating how to use a pre\_hook to update the session\_state.                                  |
| [Stream Hook](/examples/agents/hooks/stream-hook)                                                    | Example demonstrating sending a notification to the user after an agent generates a response.               |
| [Tool Hooks](/examples/agents/hooks/tool-hooks)                                                      | Use tool\_hooks to add middleware that wraps every tool call.                                               |
| [Few Shot Learning](/examples/agents/context-management/few-shot-learning)                           | This example demonstrates how to use additional\_input with an Agent.                                       |
| [Filter Tool Calls From History](/examples/agents/context-management/filter-tool-calls-from-history) | Demonstrates `max_tool_calls_from_history` by showing that tool-call filtering only.                        |
| [Instructions With State](/examples/agents/context-management/instructions-with-state)               | Example demonstrating how to use a function as instructions for an agent.                                   |
| [Instructions](/examples/agents/context-management/instructions)                                     | Manage agent instructions and context.                                                                      |
| [Introduction Message](/examples/agents/context-management/introduction-message)                     | Use the introduction parameter to set an initial greeting message.                                          |
| [System Message](/examples/agents/context-management/system-message)                                 | Customize the agent's system message and role.                                                              |