Type Alias AfterAgentCallback 

pub type AfterAgentCallback = Box<dyn Fn(Arc<dyn CallbackContext>) -> Pin<Box<dyn Future<Output = Result<Option<Content>, AdkError>> + Send>> + Send + Sync>;

Core traits and types.

Always available regardless of feature flags. Includes:

• Agent - The fundamental trait for all agents
• Tool / Toolset - For extending agents with capabilities
• Session / State - For managing conversation context
• Event - For streaming agent responses
• AdkError / Result - Unified error handling Callback invoked after an agent completes. Return Ok(Some(content)) to override.

Aliased Type

pub struct AfterAgentCallback(/* private fields */);