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fix: avoid mutating handoff message roles (#5808)

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Co-authored-by: Jacob Alber <jaalber@microsoft.com>
This commit is contained in:
Yufeng He
2026-05-13 18:52:19 +00:00
committed by GitHub
co-authored by Jacob Alber
parent bd0d6070f1
commit 9b9604ce18
4 changed files with 101 additions and 40 deletions
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dotnet/src/Microsoft.Agents.AI.Workflows/Specialized/HandoffAgentExecutor.cs
+3 -6
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@@ -235,11 +235,10 @@ internal sealed class HandoffAgentExecutor :
// This will not filter out tool responses and approval responses that are part of this agent's turn, which is
// the expected behavior since those are part of the agent's reasoning process.
HandoffMessagesFilter handoffMessagesFilter = new(this._options.ToolCallFilteringBehavior);
IEnumerable<ChatMessage> messagesForAgent = state.IncomingState.RequestedHandoffTargetAgentId is not null
List<ChatMessage> messagesForAgent = (state.IncomingState.RequestedHandoffTargetAgentId is not null
? handoffMessagesFilter.FilterMessages(incomingMessages)
: incomingMessages;
List<ChatMessage>? roleChanges = messagesForAgent.ChangeAssistantToUserForOtherParticipants(this._agent.Name ?? this._agent.Id);
: incomingMessages)
.CopyWithAssistantToUserForOtherParticipants(this._agent.Name ?? this._agent.Id);
bool emitUpdateEvents = state.IncomingState!.ShouldEmitStreamingEvents(this._options.EmitAgentResponseUpdateEvents);
AgentInvocationResult result = await this.InvokeAgentAsync(messagesForAgent, context, emitUpdateEvents, cancellationToken)
@@ -250,8 +249,6 @@ internal sealed class HandoffAgentExecutor :
throw new InvalidOperationException("Cannot request a handoff while holding pending requests.");
}
roleChanges.ResetUserToAssistantForChangedRoles();
int newConversationBookmark = state.ConversationBookmark;
await this._sharedStateRef.InvokeWithStateAsync(
(sharedState, ctx, ct) =>