.NET: [Bug]: AgentSession ignored by agent.RunStreamingAsync after upgrade from 1.0.0-preview.260205.1 to 1.0.0-preview.260209.1

[IharYakimush]

Description

looks like streaming invocation of agent ignores session.

1. Tell me a joke about a pirate. -> any joke
2. repeat last joke -> It seems I haven't told a joke yet...

see code sample for details

Code Sample

IChatClient chatClient = this.ServiceProvider.GetRequiredKeyedService<IChatClient>("default");

var agent = chatClient.AsAIAgent(instructions: "You are good at telling jokes.", name: "Joker");

AgentSession session = await agent.CreateSessionAsync();

// Invoke the agent and output the text result.
AgentResponse response = await agent.RunAsync("Tell me a joke about a pirate.",session: session);
this.Output.WriteLine(response.ToString());

StringBuilder sb = new();
// Invoke the agent with streaming support.
await foreach (var update in agent.RunStreamingAsync("repeat last joke", session: session))
{
    sb.Append(update);
}

this.Output.WriteLine(sb.ToString());

Error Messages / Stack Traces

Package Versions

1.0.0-preview.260209.1

.NET Version

.NET 10

Additional Context

No response

[marcominerva]

I’m experiencing the same issue, and it only affects RunStreamingAsync. The RunAsync method works correctly with agent session.

Downgrading to version 1.0.0-preview.260205.1 resolves the issue, so this appears to be a regression.

[rogerbarreto]

The regression was addressed in this PR

• .NET: Fix RunStreamingAsync not including chat history in messages sent to chat client #3798

And will be available in the next release.