Function boxed_future 

pub fn boxed_future<'a, T>(
    fut: impl Future<Output = T> + Send + 'a,
) -> Pin<Box<dyn Future<Output = T> + Send + 'a>>

Wraps an async expression into Pin<Box<dyn Future<Output = T> + Send + 'a>>.

This is the minimal helper for reducing AgentExecutor boilerplate. Instead of:

fn execute<'a>(...) -> Pin<Box<dyn Future<Output = A2aResult<()>> + Send + 'a>> {
    Box::pin(async move { ... })
}

You can write:

fn execute<'a>(...) -> Pin<Box<dyn Future<Output = A2aResult<()>> + Send + 'a>> {
    boxed_future(async move { ... })
}