ai-elements-a2a/dev.ai.elements.a2a/A2aBackend

A2aBackend

class A2aBackend(agent: A2aAgent) : ChatBackend(source)

A remote A2A agent as a chat provider.

Each turn sends the last user message with the conversation's A2A contextId; when the previous reply left the task input-required (or auth-required), the answer continues that task. Both ids are kept in the reply's ChatMessage.metadata under a2a.

Mapping to the UI: artifacts and the agent's final message become text, files and data parts; progress messages while the task is working show as a data-task checklist; failed / rejected / canceled end the turn with an error.

Constructors

A2aBackend

constructor(agent: A2aAgent)

Types

Companion

object Companion

Functions

stream

open override fun stream(history: List<Message>): Flow<ChatEvent>