Hooks

Example	Description
Post Hook Output	Example demonstrating output validation using post-hooks with Agno Agent.
Pre Hook Input	Example demonstrating how to use a pre_hook to perform comprehensive input validation for your Agno Agent.
Session State Hooks	Example demonstrating how to use a pre_hook to update the session_state.
Stream Hook	Example demonstrating sending a notification to the user after an agent generates a response.
Tool Hooks	Use tool_hooks to add middleware that wraps every tool call.
Few Shot Learning	Use additional_input with an Agent.
Filter Tool Calls From History	Demonstrates `max_tool_calls_from_history` by showing that tool-call filtering only affects model input history while full run history remains in storage.
Instructions With State	Example demonstrating how to use a function as instructions for an agent.
Instructions	Add the current date and time to the agent’s context with add_datetime_to_context and a timezone.
Introduction Message	Use the introduction parameter to set an initial greeting message.
System Message	Customize the agent’s system message and role.
Custom Datetime Format	Customize the datetime format injected into the agent’s system context.
Message History Hooks	Access the current run’s message history inside tool pre/post hooks via run_context.messages.