A2A Task Lifecycle

Before writing code

Fetch live docs:

1. Fetch https://a2a-protocol.org/latest/specification/ for the Task object schema and state machine
2. Web-search site:github.com a2aproject A2A task lifecycle states for state transition rules
3. Web-search site:github.com a2aproject a2a-samples task for task handling examples
4. Fetch SDK docs for task-related classes and state management utilities

Conceptual Architecture

What a Task Is

A Task is the central unit of work in A2A. It represents a request from a client agent to a server agent, tracks progress through well-defined states, accumulates messages and artifacts, and reaches a terminal state when complete.

Task Structure