A2A Task

Coordinate An A2A Task is the core stateful unit of work in the Agent2Agent (A2A) protocol. When a client agent sends a message to a remote agent, the server tracks execution through a deterministic state machine (submitted, working, input-required, auth-required, completed, failed, canceled, rejected), streaming incremental status events and emitting immutable output Artifacts composed of typed content Part objects. Used by: a2a.