Get Task and List Tasks

GetTask retrieves a single task by ID. ListTasks returns a paginated list of tasks through the client abstraction and supported transports.

GetTask flow

1. Store the task ID from SendMessage or a stream event.
2. Build lf::a2a::v1::GetTaskRequest.
3. Call A2AClient::GetTask.
4. Interpret task status, artifacts, and history according to your application policy.

ListTasks flow

a2a::client::ListTasksRequest contains:

• page_size
• page_token

The response includes task values plus next_page_token.

Operational guidance

• Use bounded polling with backoff when not using streaming.
• Enforce authorization checks on server-side task visibility.
• Avoid exposing full task history to clients that do not need it.