Since PR #1984 the HostedAgentResponseExecutor expects either agent.name or metadata["entity_id"] to be sent by the requesting client.

Unfortunately this breaks the AgentWebChat (for all OpenAI clients - also the A2A is not working but I don't know if this is related)

The current IChatClient abstractions of OpenAI.ChatClient and OpenAIResponseClient don't allow passing either an Agent nor metadata.

More notes:

• OpenAI.ChatClient allows metadata via the OpenAI.Chat.ChatClientOptions parameter in the GetChatCompletionAsync method
• OpenAI.ChatClient allows metadata via the OpenAI.Responses.ResponseCreationOptions parameter in the CreateResponseStreamingAsync method

I currently see two possible solutions:

• Roll back the requirement for agent.name or metadata["entity_id"]
• MEAI has to add support so that we can pass metadata via the IChatClient abstractions